Refine iteration variable validation in CEL macros.#1096

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copybara-service merged 1 commit into from
Jun 17, 2026
Merged

Refine iteration variable validation in CEL macros. #1096

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9 changes: 7 additions & 2 deletions extensions/src/main/java/dev/cel/extensions/CelComprehensionsExtensions.java
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Original file line numberDiff line numberDiff line change
Expand Up@@ -479,9 +479,8 @@ private static Optional<CelExpr> transformMapEntryMacro(

private static CelExpr validatedIterationVariable(
CelMacroExprFactory exprFactory, CelExpr argument) {

CelExpr arg = checkNotNull(argument);
if (arg.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
if (!isSimpleIdentifier(arg)) {
return reportArgumentError(exprFactory, arg);
} else if (arg.exprKind().ident().name().equals("__result__")) {
return reportAccumulatorOverwriteError(exprFactory, arg);
Expand All@@ -490,6 +489,12 @@ private static CelExpr validatedIterationVariable(
}
}

private static boolean isSimpleIdentifier(CelExpr expr) {
return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
&& !expr.ident().name().isEmpty()
&& !expr.ident().name().startsWith(".");
}

private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
return exprFactory.reportError(
CelIssue.formatError(
Expand Down
51 changes: 38 additions & 13 deletions parser/src/main/java/dev/cel/parser/CelStandardMacro.java
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Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -122,9 +122,9 @@ private static Optional<CelExpr> expandAllMacro(
checkNotNull(exprFactory);
checkNotNull(target);
checkArgument(arguments.size() == 2);
CelExpr arg0 = checkNotNull(arguments.get(0));
CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
return Optional.of(reportArgumentError(exprFactory, arg0));
return Optional.of(arg0);
}
CelExpr arg1 = checkNotNull(arguments.get(1));
CelExpr accuInit = exprFactory.newBoolLiteral(true);
Expand DownExpand Up@@ -155,9 +155,9 @@ private static Optional<CelExpr> expandExistsMacro(
checkNotNull(exprFactory);
checkNotNull(target);
checkArgument(arguments.size() == 2);
CelExpr arg0 = checkNotNull(arguments.get(0));
CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
return Optional.of(reportArgumentError(exprFactory, arg0));
return Optional.of(arg0);
}
CelExpr arg1 = checkNotNull(arguments.get(1));
CelExpr accuInit = exprFactory.newBoolLiteral(false);
Expand DownExpand Up@@ -190,9 +190,9 @@ private static Optional<CelExpr> expandExistsOneMacro(
checkNotNull(exprFactory);
checkNotNull(target);
checkArgument(arguments.size() == 2);
CelExpr arg0 = checkNotNull(arguments.get(0));
CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
return Optional.of(reportArgumentError(exprFactory, arg0));
return Optional.of(arg0);
}
CelExpr arg1 = checkNotNull(arguments.get(1));
CelExpr accuInit = exprFactory.newIntLiteral(0);
Expand DownExpand Up@@ -228,12 +228,9 @@ private static Optional<CelExpr> expandMapMacro(
checkNotNull(exprFactory);
checkNotNull(target);
checkArgument(arguments.size() == 2 || arguments.size() == 3);
CelExpr arg0 = checkNotNull(arguments.get(0));
CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
return Optional.of(
exprFactory.reportError(
CelIssue.formatError(
exprFactory.getSourceLocation(arg0), "argument is not an identifier")));
return Optional.of(arg0);
}
CelExpr arg1;
CelExpr arg2;
Expand DownExpand Up@@ -276,9 +273,9 @@ private static Optional<CelExpr> expandFilterMacro(
checkNotNull(exprFactory);
checkNotNull(target);
checkArgument(arguments.size() == 2);
CelExpr arg0 = checkNotNull(arguments.get(0));
CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
return Optional.of(reportArgumentError(exprFactory, arg0));
return Optional.of(arg0);
}
CelExpr arg1 = checkNotNull(arguments.get(1));
CelExpr accuInit = exprFactory.newList();
Expand All@@ -305,9 +302,37 @@ private static Optional<CelExpr> expandFilterMacro(
exprFactory.newIdentifier(exprFactory.getAccumulatorVarName())));
}

private static CelExpr validatedIterationVariable(
CelMacroExprFactory exprFactory, CelExpr argument) {
CelExpr arg = checkNotNull(argument);
if (!isSimpleIdentifier(arg)) {
return reportArgumentError(exprFactory, arg);
} else if (arg.exprKind().ident().name().equals("__result__")) {
return reportAccumulatorOverwriteError(exprFactory, arg);
} else {
return arg;
}
}

private static boolean isSimpleIdentifier(CelExpr expr) {
return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
&& !expr.ident().name().isEmpty()
&& !expr.ident().name().startsWith(".");
}

private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
return exprFactory.reportError(
CelIssue.formatError(
exprFactory.getSourceLocation(argument), "The argument must be a simple name"));
}

private static CelExpr reportAccumulatorOverwriteError(
CelMacroExprFactory exprFactory, CelExpr argument) {
return exprFactory.reportError(
CelIssue.formatError(
exprFactory.getSourceLocation(argument),
String.format(
"The iteration variable %s overwrites accumulator variable",
argument.ident().name())));
}
}
10 changes: 10 additions & 0 deletions parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -245,6 +245,16 @@ public void parser_errors() {
runTest(PARSER, "1 + $");
runTest(PARSER, "1.all(2, 3)");
runTest(PARSER, "1.exists(2, 3)");
runTest(PARSER, "[].all(__result__, x)");
runTest(PARSER, "[].exists(__result__, x)");
runTest(PARSER, "[].exists_one(__result__, x)");
runTest(PARSER, "[].map(__result__, x, x)");
runTest(PARSER, "[].filter(__result__, x)");
runTest(PARSER, "[].all(.x, x)");
runTest(PARSER, "[].exists(.x, x)");
runTest(PARSER, "[].exists_one(.x, x)");
runTest(PARSER, "[].map(.x, x, x)");
runTest(PARSER, "[].filter(.x, x)");
runTest(PARSER, "1 + +");
runTest(PARSER, "\"\\xFh\"");
runTest(PARSER, "\"\\a\\b\\f\\n\\r\\t\\v\\'\\\"\\\\\\? Illegal escape \\>\"");
Expand Down
64 changes: 62 additions & 2 deletions parser/src/test/resources/parser_errors.baseline
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -52,6 +52,66 @@ E: ERROR: <input>:1:10: The argument must be a simple name
| 1.exists(2, 3)
| .........^

I: [].all(__result__, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
| [].all(__result__, x)
| .......^

I: [].exists(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
| [].exists(__result__, x)
| ..........^

I: [].exists_one(__result__, x)
=====>
E: ERROR: <input>:1:15: The iteration variable __result__ overwrites accumulator variable
| [].exists_one(__result__, x)
| ..............^

I: [].map(__result__, x, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
| [].map(__result__, x, x)
| .......^

I: [].filter(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
| [].filter(__result__, x)
| ..........^

I: [].all(.x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
| [].all(.x, x)
| ........^

I: [].exists(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
| [].exists(.x, x)
| ...........^

I: [].exists_one(.x, x)
=====>
E: ERROR: <input>:1:16: The argument must be a simple name
| [].exists_one(.x, x)
| ...............^

I: [].map(.x, x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
| [].map(.x, x, x)
| ........^

I: [].filter(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
| [].filter(.x, x)
| ...........^

I: 1 + +
=====>
E: ERROR: <input>:1:5: mismatched input '+' expecting {'[', '{', '(', '.', '-', '!', 'true', 'false', 'null', NUM_FLOAT, NUM_INT, NUM_UINT, STRING, BYTES, IDENTIFIER}
Expand DownExpand Up@@ -219,7 +279,7 @@ I: [1, 2, 3].map(var, var * var)
E: ERROR: <input>:1:15: reserved identifier: var
| [1, 2, 3].map(var, var * var)
| ..............^
ERROR: <input>:1:15: argument is not an identifier
ERROR: <input>:1:15: The argument must be a simple name
| [1, 2, 3].map(var, var * var)
| ..............^
ERROR: <input>:1:20: reserved identifier: var
Expand DownExpand Up@@ -362,4 +422,4 @@ ERROR: <input>:1:6: unsupported syntax '`'
| .....^
ERROR: <input>:1:9: missing ')' at '<EOF>'
| has(.`.`
| ........^
| ........^
Loading
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
Refine iteration variable validation in CEL macros.#1096

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 Merged

copybara-service
merged 1 commit into

from

Jun 17, 2026
 Merged


Refine iteration variable validation in CEL macros.
#1096
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9 changes: 7 additions & 2 deletions
extensions/src/main/java/dev/cel/extensions/CelComprehensionsExtensions.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -479,9 +479,8 @@ private static Optional<CelExpr> transformMapEntryMacro(

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {

 CelExpr arg = checkNotNull(argument);
 if (arg.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
Expand All@@ -490,6 +489,12 @@ private static CelExpr validatedIterationVariable(
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
Expand Down

51 changes: 38 additions & 13 deletions
parser/src/main/java/dev/cel/parser/CelStandardMacro.java

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -122,9 +122,9 @@ private static Optional<CelExpr> expandAllMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(true);
Expand DownExpand Up@@ -155,9 +155,9 @@ private static Optional<CelExpr> expandExistsMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(false);
Expand DownExpand Up@@ -190,9 +190,9 @@ private static Optional<CelExpr> expandExistsOneMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newIntLiteral(0);
Expand DownExpand Up@@ -228,12 +228,9 @@ private static Optional<CelExpr> expandMapMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2 || arguments.size() == 3);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(
 exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(arg0), "argument is not an identifier")));
 return Optional.of(arg0);
 }
 CelExpr arg1;
 CelExpr arg2;
Expand DownExpand Up@@ -276,9 +273,9 @@ private static Optional<CelExpr> expandFilterMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newList();
Expand All@@ -305,9 +302,37 @@ private static Optional<CelExpr> expandFilterMacro(
 exprFactory.newIdentifier(exprFactory.getAccumulatorVarName())));
 }

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 CelExpr arg = checkNotNull(argument);
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
 } else {
 return arg;
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument), "The argument must be a simple name"));
 }

 private static CelExpr reportAccumulatorOverwriteError(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument),
 String.format(
 "The iteration variable %s overwrites accumulator variable",
 argument.ident().name())));
 }
}

10 changes: 10 additions & 0 deletions
parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -245,6 +245,16 @@ public void parser_errors() {
 runTest(PARSER, "1 + $");
 runTest(PARSER, "1.all(2, 3)");
 runTest(PARSER, "1.exists(2, 3)");
 runTest(PARSER, "[].all(__result__, x)");
 runTest(PARSER, "[].exists(__result__, x)");
 runTest(PARSER, "[].exists_one(__result__, x)");
 runTest(PARSER, "[].map(__result__, x, x)");
 runTest(PARSER, "[].filter(__result__, x)");
 runTest(PARSER, "[].all(.x, x)");
 runTest(PARSER, "[].exists(.x, x)");
 runTest(PARSER, "[].exists_one(.x, x)");
 runTest(PARSER, "[].map(.x, x, x)");
 runTest(PARSER, "[].filter(.x, x)");
 runTest(PARSER, "1 + +");
 runTest(PARSER, "\"\\xFh\"");
 runTest(PARSER, "\"\\a\\b\\f\\n\\r\\t\\v\\'\\\"\\\\\\? Illegal escape \\>\"");
Expand Down

64 changes: 62 additions & 2 deletions
parser/src/test/resources/parser_errors.baseline

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Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -52,6 +52,66 @@ E: ERROR: <input>:1:10: The argument must be a simple name
 | 1.exists(2, 3)
 | .........^

I: [].all(__result__, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].all(__result__, x)
 | .......^

I: [].exists(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].exists(__result__, x)
 | ..........^

I: [].exists_one(__result__, x)
=====>
E: ERROR: <input>:1:15: The iteration variable __result__ overwrites accumulator variable
 | [].exists_one(__result__, x)
 | ..............^

I: [].map(__result__, x, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].map(__result__, x, x)
 | .......^

I: [].filter(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].filter(__result__, x)
 | ..........^

I: [].all(.x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].all(.x, x)
 | ........^

I: [].exists(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].exists(.x, x)
 | ...........^

I: [].exists_one(.x, x)
=====>
E: ERROR: <input>:1:16: The argument must be a simple name
 | [].exists_one(.x, x)
 | ...............^

I: [].map(.x, x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].map(.x, x, x)
 | ........^

I: [].filter(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].filter(.x, x)
 | ...........^

I: 1 + +
=====>
E: ERROR: <input>:1:5: mismatched input '+' expecting {'[', '{', '(', '.', '-', '!', 'true', 'false', 'null', NUM_FLOAT, NUM_INT, NUM_UINT, STRING, BYTES, IDENTIFIER}
Expand DownExpand Up@@ -219,7 +279,7 @@ I: [1, 2, 3].map(var, var * var)
E: ERROR: <input>:1:15: reserved identifier: var
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:15: argument is not an identifier
ERROR: <input>:1:15: The argument must be a simple name
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:20: reserved identifier: var
Expand DownExpand Up@@ -362,4 +422,4 @@ ERROR: <input>:1:6: unsupported syntax '`'
 | .....^
ERROR: <input>:1:9: missing ')' at '<EOF>'
 | has(.`.`
 | ........^
 | ........^
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Refine iteration variable validation in CEL macros.#1096

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 Merged

copybara-service
merged 1 commit into

from

Jun 17, 2026
 Merged


Refine iteration variable validation in CEL macros.
#1096
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9 changes: 7 additions & 2 deletions
extensions/src/main/java/dev/cel/extensions/CelComprehensionsExtensions.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -479,9 +479,8 @@ private static Optional<CelExpr> transformMapEntryMacro(

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {

 CelExpr arg = checkNotNull(argument);
 if (arg.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
Expand All@@ -490,6 +489,12 @@ private static CelExpr validatedIterationVariable(
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
Expand Down

51 changes: 38 additions & 13 deletions
parser/src/main/java/dev/cel/parser/CelStandardMacro.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -122,9 +122,9 @@ private static Optional<CelExpr> expandAllMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(true);
Expand DownExpand Up@@ -155,9 +155,9 @@ private static Optional<CelExpr> expandExistsMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(false);
Expand DownExpand Up@@ -190,9 +190,9 @@ private static Optional<CelExpr> expandExistsOneMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newIntLiteral(0);
Expand DownExpand Up@@ -228,12 +228,9 @@ private static Optional<CelExpr> expandMapMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2 || arguments.size() == 3);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(
 exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(arg0), "argument is not an identifier")));
 return Optional.of(arg0);
 }
 CelExpr arg1;
 CelExpr arg2;
Expand DownExpand Up@@ -276,9 +273,9 @@ private static Optional<CelExpr> expandFilterMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newList();
Expand All@@ -305,9 +302,37 @@ private static Optional<CelExpr> expandFilterMacro(
 exprFactory.newIdentifier(exprFactory.getAccumulatorVarName())));
 }

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 CelExpr arg = checkNotNull(argument);
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
 } else {
 return arg;
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument), "The argument must be a simple name"));
 }

 private static CelExpr reportAccumulatorOverwriteError(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument),
 String.format(
 "The iteration variable %s overwrites accumulator variable",
 argument.ident().name())));
 }
}

10 changes: 10 additions & 0 deletions
parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -245,6 +245,16 @@ public void parser_errors() {
 runTest(PARSER, "1 + $");
 runTest(PARSER, "1.all(2, 3)");
 runTest(PARSER, "1.exists(2, 3)");
 runTest(PARSER, "[].all(__result__, x)");
 runTest(PARSER, "[].exists(__result__, x)");
 runTest(PARSER, "[].exists_one(__result__, x)");
 runTest(PARSER, "[].map(__result__, x, x)");
 runTest(PARSER, "[].filter(__result__, x)");
 runTest(PARSER, "[].all(.x, x)");
 runTest(PARSER, "[].exists(.x, x)");
 runTest(PARSER, "[].exists_one(.x, x)");
 runTest(PARSER, "[].map(.x, x, x)");
 runTest(PARSER, "[].filter(.x, x)");
 runTest(PARSER, "1 + +");
 runTest(PARSER, "\"\\xFh\"");
 runTest(PARSER, "\"\\a\\b\\f\\n\\r\\t\\v\\'\\\"\\\\\\? Illegal escape \\>\"");
Expand Down

64 changes: 62 additions & 2 deletions
parser/src/test/resources/parser_errors.baseline

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -52,6 +52,66 @@ E: ERROR: <input>:1:10: The argument must be a simple name
 | 1.exists(2, 3)
 | .........^

I: [].all(__result__, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].all(__result__, x)
 | .......^

I: [].exists(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].exists(__result__, x)
 | ..........^

I: [].exists_one(__result__, x)
=====>
E: ERROR: <input>:1:15: The iteration variable __result__ overwrites accumulator variable
 | [].exists_one(__result__, x)
 | ..............^

I: [].map(__result__, x, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].map(__result__, x, x)
 | .......^

I: [].filter(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].filter(__result__, x)
 | ..........^

I: [].all(.x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].all(.x, x)
 | ........^

I: [].exists(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].exists(.x, x)
 | ...........^

I: [].exists_one(.x, x)
=====>
E: ERROR: <input>:1:16: The argument must be a simple name
 | [].exists_one(.x, x)
 | ...............^

I: [].map(.x, x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].map(.x, x, x)
 | ........^

I: [].filter(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].filter(.x, x)
 | ...........^

I: 1 + +
=====>
E: ERROR: <input>:1:5: mismatched input '+' expecting {'[', '{', '(', '.', '-', '!', 'true', 'false', 'null', NUM_FLOAT, NUM_INT, NUM_UINT, STRING, BYTES, IDENTIFIER}
Expand DownExpand Up@@ -219,7 +279,7 @@ I: [1, 2, 3].map(var, var * var)
E: ERROR: <input>:1:15: reserved identifier: var
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:15: argument is not an identifier
ERROR: <input>:1:15: The argument must be a simple name
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:20: reserved identifier: var
Expand DownExpand Up@@ -362,4 +422,4 @@ ERROR: <input>:1:6: unsupported syntax '`'
 | .....^
ERROR: <input>:1:9: missing ')' at '<EOF>'
 | has(.`.`
 | ........^
 | ........^
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Refine iteration variable validation in CEL macros.#1096

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 Merged

copybara-service
merged 1 commit into

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Jun 17, 2026
 Merged


Refine iteration variable validation in CEL macros.
#1096
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9 changes: 7 additions & 2 deletions
extensions/src/main/java/dev/cel/extensions/CelComprehensionsExtensions.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -479,9 +479,8 @@ private static Optional<CelExpr> transformMapEntryMacro(

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {

 CelExpr arg = checkNotNull(argument);
 if (arg.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
Expand All@@ -490,6 +489,12 @@ private static CelExpr validatedIterationVariable(
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
Expand Down

51 changes: 38 additions & 13 deletions
parser/src/main/java/dev/cel/parser/CelStandardMacro.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -122,9 +122,9 @@ private static Optional<CelExpr> expandAllMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(true);
Expand DownExpand Up@@ -155,9 +155,9 @@ private static Optional<CelExpr> expandExistsMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(false);
Expand DownExpand Up@@ -190,9 +190,9 @@ private static Optional<CelExpr> expandExistsOneMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newIntLiteral(0);
Expand DownExpand Up@@ -228,12 +228,9 @@ private static Optional<CelExpr> expandMapMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2 || arguments.size() == 3);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(
 exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(arg0), "argument is not an identifier")));
 return Optional.of(arg0);
 }
 CelExpr arg1;
 CelExpr arg2;
Expand DownExpand Up@@ -276,9 +273,9 @@ private static Optional<CelExpr> expandFilterMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newList();
Expand All@@ -305,9 +302,37 @@ private static Optional<CelExpr> expandFilterMacro(
 exprFactory.newIdentifier(exprFactory.getAccumulatorVarName())));
 }

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 CelExpr arg = checkNotNull(argument);
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
 } else {
 return arg;
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument), "The argument must be a simple name"));
 }

 private static CelExpr reportAccumulatorOverwriteError(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument),
 String.format(
 "The iteration variable %s overwrites accumulator variable",
 argument.ident().name())));
 }
}

10 changes: 10 additions & 0 deletions
parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -245,6 +245,16 @@ public void parser_errors() {
 runTest(PARSER, "1 + $");
 runTest(PARSER, "1.all(2, 3)");
 runTest(PARSER, "1.exists(2, 3)");
 runTest(PARSER, "[].all(__result__, x)");
 runTest(PARSER, "[].exists(__result__, x)");
 runTest(PARSER, "[].exists_one(__result__, x)");
 runTest(PARSER, "[].map(__result__, x, x)");
 runTest(PARSER, "[].filter(__result__, x)");
 runTest(PARSER, "[].all(.x, x)");
 runTest(PARSER, "[].exists(.x, x)");
 runTest(PARSER, "[].exists_one(.x, x)");
 runTest(PARSER, "[].map(.x, x, x)");
 runTest(PARSER, "[].filter(.x, x)");
 runTest(PARSER, "1 + +");
 runTest(PARSER, "\"\\xFh\"");
 runTest(PARSER, "\"\\a\\b\\f\\n\\r\\t\\v\\'\\\"\\\\\\? Illegal escape \\>\"");
Expand Down

64 changes: 62 additions & 2 deletions
parser/src/test/resources/parser_errors.baseline

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -52,6 +52,66 @@ E: ERROR: <input>:1:10: The argument must be a simple name
 | 1.exists(2, 3)
 | .........^

I: [].all(__result__, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].all(__result__, x)
 | .......^

I: [].exists(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].exists(__result__, x)
 | ..........^

I: [].exists_one(__result__, x)
=====>
E: ERROR: <input>:1:15: The iteration variable __result__ overwrites accumulator variable
 | [].exists_one(__result__, x)
 | ..............^

I: [].map(__result__, x, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].map(__result__, x, x)
 | .......^

I: [].filter(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].filter(__result__, x)
 | ..........^

I: [].all(.x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].all(.x, x)
 | ........^

I: [].exists(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].exists(.x, x)
 | ...........^

I: [].exists_one(.x, x)
=====>
E: ERROR: <input>:1:16: The argument must be a simple name
 | [].exists_one(.x, x)
 | ...............^

I: [].map(.x, x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].map(.x, x, x)
 | ........^

I: [].filter(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].filter(.x, x)
 | ...........^

I: 1 + +
=====>
E: ERROR: <input>:1:5: mismatched input '+' expecting {'[', '{', '(', '.', '-', '!', 'true', 'false', 'null', NUM_FLOAT, NUM_INT, NUM_UINT, STRING, BYTES, IDENTIFIER}
Expand DownExpand Up@@ -219,7 +279,7 @@ I: [1, 2, 3].map(var, var * var)
E: ERROR: <input>:1:15: reserved identifier: var
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:15: argument is not an identifier
ERROR: <input>:1:15: The argument must be a simple name
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:20: reserved identifier: var
Expand DownExpand Up@@ -362,4 +422,4 @@ ERROR: <input>:1:6: unsupported syntax '`'
 | .....^
ERROR: <input>:1:9: missing ')' at '<EOF>'
 | has(.`.`
 | ........^
 | ........^
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
Refine iteration variable validation in CEL macros.#1096

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

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 Merged

copybara-service
merged 1 commit into

from

Jun 17, 2026
 Merged


Refine iteration variable validation in CEL macros.
#1096
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9 changes: 7 additions & 2 deletions
extensions/src/main/java/dev/cel/extensions/CelComprehensionsExtensions.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -479,9 +479,8 @@ private static Optional<CelExpr> transformMapEntryMacro(

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {

 CelExpr arg = checkNotNull(argument);
 if (arg.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
Expand All@@ -490,6 +489,12 @@ private static CelExpr validatedIterationVariable(
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
Expand Down

51 changes: 38 additions & 13 deletions
parser/src/main/java/dev/cel/parser/CelStandardMacro.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -122,9 +122,9 @@ private static Optional<CelExpr> expandAllMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(true);
Expand DownExpand Up@@ -155,9 +155,9 @@ private static Optional<CelExpr> expandExistsMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(false);
Expand DownExpand Up@@ -190,9 +190,9 @@ private static Optional<CelExpr> expandExistsOneMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newIntLiteral(0);
Expand DownExpand Up@@ -228,12 +228,9 @@ private static Optional<CelExpr> expandMapMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2 || arguments.size() == 3);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(
 exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(arg0), "argument is not an identifier")));
 return Optional.of(arg0);
 }
 CelExpr arg1;
 CelExpr arg2;
Expand DownExpand Up@@ -276,9 +273,9 @@ private static Optional<CelExpr> expandFilterMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newList();
Expand All@@ -305,9 +302,37 @@ private static Optional<CelExpr> expandFilterMacro(
 exprFactory.newIdentifier(exprFactory.getAccumulatorVarName())));
 }

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 CelExpr arg = checkNotNull(argument);
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
 } else {
 return arg;
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument), "The argument must be a simple name"));
 }

 private static CelExpr reportAccumulatorOverwriteError(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument),
 String.format(
 "The iteration variable %s overwrites accumulator variable",
 argument.ident().name())));
 }
}

10 changes: 10 additions & 0 deletions
parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -245,6 +245,16 @@ public void parser_errors() {
 runTest(PARSER, "1 + $");
 runTest(PARSER, "1.all(2, 3)");
 runTest(PARSER, "1.exists(2, 3)");
 runTest(PARSER, "[].all(__result__, x)");
 runTest(PARSER, "[].exists(__result__, x)");
 runTest(PARSER, "[].exists_one(__result__, x)");
 runTest(PARSER, "[].map(__result__, x, x)");
 runTest(PARSER, "[].filter(__result__, x)");
 runTest(PARSER, "[].all(.x, x)");
 runTest(PARSER, "[].exists(.x, x)");
 runTest(PARSER, "[].exists_one(.x, x)");
 runTest(PARSER, "[].map(.x, x, x)");
 runTest(PARSER, "[].filter(.x, x)");
 runTest(PARSER, "1 + +");
 runTest(PARSER, "\"\\xFh\"");
 runTest(PARSER, "\"\\a\\b\\f\\n\\r\\t\\v\\'\\\"\\\\\\? Illegal escape \\>\"");
Expand Down

64 changes: 62 additions & 2 deletions
parser/src/test/resources/parser_errors.baseline

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -52,6 +52,66 @@ E: ERROR: <input>:1:10: The argument must be a simple name
 | 1.exists(2, 3)
 | .........^

I: [].all(__result__, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].all(__result__, x)
 | .......^

I: [].exists(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].exists(__result__, x)
 | ..........^

I: [].exists_one(__result__, x)
=====>
E: ERROR: <input>:1:15: The iteration variable __result__ overwrites accumulator variable
 | [].exists_one(__result__, x)
 | ..............^

I: [].map(__result__, x, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].map(__result__, x, x)
 | .......^

I: [].filter(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].filter(__result__, x)
 | ..........^

I: [].all(.x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].all(.x, x)
 | ........^

I: [].exists(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].exists(.x, x)
 | ...........^

I: [].exists_one(.x, x)
=====>
E: ERROR: <input>:1:16: The argument must be a simple name
 | [].exists_one(.x, x)
 | ...............^

I: [].map(.x, x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].map(.x, x, x)
 | ........^

I: [].filter(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].filter(.x, x)
 | ...........^

I: 1 + +
=====>
E: ERROR: <input>:1:5: mismatched input '+' expecting {'[', '{', '(', '.', '-', '!', 'true', 'false', 'null', NUM_FLOAT, NUM_INT, NUM_UINT, STRING, BYTES, IDENTIFIER}
Expand DownExpand Up@@ -219,7 +279,7 @@ I: [1, 2, 3].map(var, var * var)
E: ERROR: <input>:1:15: reserved identifier: var
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:15: argument is not an identifier
ERROR: <input>:1:15: The argument must be a simple name
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:20: reserved identifier: var
Expand DownExpand Up@@ -362,4 +422,4 @@ ERROR: <input>:1:6: unsupported syntax '`'
 | .....^
ERROR: <input>:1:9: missing ')' at '<EOF>'
 | has(.`.`
 | ........^
 | ........^
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Refine iteration variable validation in CEL macros.#1096

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copybara-service
merged 1 commit into

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Jun 17, 2026
 Merged


Refine iteration variable validation in CEL macros.
#1096
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9 changes: 7 additions & 2 deletions
extensions/src/main/java/dev/cel/extensions/CelComprehensionsExtensions.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -479,9 +479,8 @@ private static Optional<CelExpr> transformMapEntryMacro(

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {

 CelExpr arg = checkNotNull(argument);
 if (arg.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
Expand All@@ -490,6 +489,12 @@ private static CelExpr validatedIterationVariable(
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
Expand Down

51 changes: 38 additions & 13 deletions
parser/src/main/java/dev/cel/parser/CelStandardMacro.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -122,9 +122,9 @@ private static Optional<CelExpr> expandAllMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(true);
Expand DownExpand Up@@ -155,9 +155,9 @@ private static Optional<CelExpr> expandExistsMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(false);
Expand DownExpand Up@@ -190,9 +190,9 @@ private static Optional<CelExpr> expandExistsOneMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newIntLiteral(0);
Expand DownExpand Up@@ -228,12 +228,9 @@ private static Optional<CelExpr> expandMapMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2 || arguments.size() == 3);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(
 exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(arg0), "argument is not an identifier")));
 return Optional.of(arg0);
 }
 CelExpr arg1;
 CelExpr arg2;
Expand DownExpand Up@@ -276,9 +273,9 @@ private static Optional<CelExpr> expandFilterMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newList();
Expand All@@ -305,9 +302,37 @@ private static Optional<CelExpr> expandFilterMacro(
 exprFactory.newIdentifier(exprFactory.getAccumulatorVarName())));
 }

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 CelExpr arg = checkNotNull(argument);
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
 } else {
 return arg;
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument), "The argument must be a simple name"));
 }

 private static CelExpr reportAccumulatorOverwriteError(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument),
 String.format(
 "The iteration variable %s overwrites accumulator variable",
 argument.ident().name())));
 }
}

10 changes: 10 additions & 0 deletions
parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -245,6 +245,16 @@ public void parser_errors() {
 runTest(PARSER, "1 + $");
 runTest(PARSER, "1.all(2, 3)");
 runTest(PARSER, "1.exists(2, 3)");
 runTest(PARSER, "[].all(__result__, x)");
 runTest(PARSER, "[].exists(__result__, x)");
 runTest(PARSER, "[].exists_one(__result__, x)");
 runTest(PARSER, "[].map(__result__, x, x)");
 runTest(PARSER, "[].filter(__result__, x)");
 runTest(PARSER, "[].all(.x, x)");
 runTest(PARSER, "[].exists(.x, x)");
 runTest(PARSER, "[].exists_one(.x, x)");
 runTest(PARSER, "[].map(.x, x, x)");
 runTest(PARSER, "[].filter(.x, x)");
 runTest(PARSER, "1 + +");
 runTest(PARSER, "\"\\xFh\"");
 runTest(PARSER, "\"\\a\\b\\f\\n\\r\\t\\v\\'\\\"\\\\\\? Illegal escape \\>\"");
Expand Down

64 changes: 62 additions & 2 deletions
parser/src/test/resources/parser_errors.baseline

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -52,6 +52,66 @@ E: ERROR: <input>:1:10: The argument must be a simple name
 | 1.exists(2, 3)
 | .........^

I: [].all(__result__, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].all(__result__, x)
 | .......^

I: [].exists(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].exists(__result__, x)
 | ..........^

I: [].exists_one(__result__, x)
=====>
E: ERROR: <input>:1:15: The iteration variable __result__ overwrites accumulator variable
 | [].exists_one(__result__, x)
 | ..............^

I: [].map(__result__, x, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].map(__result__, x, x)
 | .......^

I: [].filter(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].filter(__result__, x)
 | ..........^

I: [].all(.x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].all(.x, x)
 | ........^

I: [].exists(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].exists(.x, x)
 | ...........^

I: [].exists_one(.x, x)
=====>
E: ERROR: <input>:1:16: The argument must be a simple name
 | [].exists_one(.x, x)
 | ...............^

I: [].map(.x, x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].map(.x, x, x)
 | ........^

I: [].filter(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].filter(.x, x)
 | ...........^

I: 1 + +
=====>
E: ERROR: <input>:1:5: mismatched input '+' expecting {'[', '{', '(', '.', '-', '!', 'true', 'false', 'null', NUM_FLOAT, NUM_INT, NUM_UINT, STRING, BYTES, IDENTIFIER}
Expand DownExpand Up@@ -219,7 +279,7 @@ I: [1, 2, 3].map(var, var * var)
E: ERROR: <input>:1:15: reserved identifier: var
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:15: argument is not an identifier
ERROR: <input>:1:15: The argument must be a simple name
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:20: reserved identifier: var
Expand DownExpand Up@@ -362,4 +422,4 @@ ERROR: <input>:1:6: unsupported syntax '`'
 | .....^
ERROR: <input>:1:9: missing ')' at '<EOF>'
 | has(.`.`
 | ........^
 | ........^
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
Refine iteration variable validation in CEL macros.#1096

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Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

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privacy statement. We’ll occasionally send you account related emails.

Already on GitHub?
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to your account

 Merged

copybara-service
merged 1 commit into

from

Jun 17, 2026
 Merged


Refine iteration variable validation in CEL macros.
#1096
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9 changes: 7 additions & 2 deletions
extensions/src/main/java/dev/cel/extensions/CelComprehensionsExtensions.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -479,9 +479,8 @@ private static Optional<CelExpr> transformMapEntryMacro(

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {

 CelExpr arg = checkNotNull(argument);
 if (arg.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
Expand All@@ -490,6 +489,12 @@ private static CelExpr validatedIterationVariable(
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
Expand Down

51 changes: 38 additions & 13 deletions
parser/src/main/java/dev/cel/parser/CelStandardMacro.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -122,9 +122,9 @@ private static Optional<CelExpr> expandAllMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(true);
Expand DownExpand Up@@ -155,9 +155,9 @@ private static Optional<CelExpr> expandExistsMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(false);
Expand DownExpand Up@@ -190,9 +190,9 @@ private static Optional<CelExpr> expandExistsOneMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newIntLiteral(0);
Expand DownExpand Up@@ -228,12 +228,9 @@ private static Optional<CelExpr> expandMapMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2 || arguments.size() == 3);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(
 exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(arg0), "argument is not an identifier")));
 return Optional.of(arg0);
 }
 CelExpr arg1;
 CelExpr arg2;
Expand DownExpand Up@@ -276,9 +273,9 @@ private static Optional<CelExpr> expandFilterMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newList();
Expand All@@ -305,9 +302,37 @@ private static Optional<CelExpr> expandFilterMacro(
 exprFactory.newIdentifier(exprFactory.getAccumulatorVarName())));
 }

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 CelExpr arg = checkNotNull(argument);
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
 } else {
 return arg;
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument), "The argument must be a simple name"));
 }

 private static CelExpr reportAccumulatorOverwriteError(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument),
 String.format(
 "The iteration variable %s overwrites accumulator variable",
 argument.ident().name())));
 }
}

10 changes: 10 additions & 0 deletions
parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -245,6 +245,16 @@ public void parser_errors() {
 runTest(PARSER, "1 + $");
 runTest(PARSER, "1.all(2, 3)");
 runTest(PARSER, "1.exists(2, 3)");
 runTest(PARSER, "[].all(__result__, x)");
 runTest(PARSER, "[].exists(__result__, x)");
 runTest(PARSER, "[].exists_one(__result__, x)");
 runTest(PARSER, "[].map(__result__, x, x)");
 runTest(PARSER, "[].filter(__result__, x)");
 runTest(PARSER, "[].all(.x, x)");
 runTest(PARSER, "[].exists(.x, x)");
 runTest(PARSER, "[].exists_one(.x, x)");
 runTest(PARSER, "[].map(.x, x, x)");
 runTest(PARSER, "[].filter(.x, x)");
 runTest(PARSER, "1 + +");
 runTest(PARSER, "\"\\xFh\"");
 runTest(PARSER, "\"\\a\\b\\f\\n\\r\\t\\v\\'\\\"\\\\\\? Illegal escape \\>\"");
Expand Down

64 changes: 62 additions & 2 deletions
parser/src/test/resources/parser_errors.baseline

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Original file line numberDiff line numberDiff line change
Expand Up@@ -52,6 +52,66 @@ E: ERROR: <input>:1:10: The argument must be a simple name
 | 1.exists(2, 3)
 | .........^

I: [].all(__result__, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].all(__result__, x)
 | .......^

I: [].exists(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].exists(__result__, x)
 | ..........^

I: [].exists_one(__result__, x)
=====>
E: ERROR: <input>:1:15: The iteration variable __result__ overwrites accumulator variable
 | [].exists_one(__result__, x)
 | ..............^

I: [].map(__result__, x, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].map(__result__, x, x)
 | .......^

I: [].filter(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].filter(__result__, x)
 | ..........^

I: [].all(.x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].all(.x, x)
 | ........^

I: [].exists(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].exists(.x, x)
 | ...........^

I: [].exists_one(.x, x)
=====>
E: ERROR: <input>:1:16: The argument must be a simple name
 | [].exists_one(.x, x)
 | ...............^

I: [].map(.x, x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].map(.x, x, x)
 | ........^

I: [].filter(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].filter(.x, x)
 | ...........^

I: 1 + +
=====>
E: ERROR: <input>:1:5: mismatched input '+' expecting {'[', '{', '(', '.', '-', '!', 'true', 'false', 'null', NUM_FLOAT, NUM_INT, NUM_UINT, STRING, BYTES, IDENTIFIER}
Expand DownExpand Up@@ -219,7 +279,7 @@ I: [1, 2, 3].map(var, var * var)
E: ERROR: <input>:1:15: reserved identifier: var
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:15: argument is not an identifier
ERROR: <input>:1:15: The argument must be a simple name
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:20: reserved identifier: var
Expand DownExpand Up@@ -362,4 +422,4 @@ ERROR: <input>:1:6: unsupported syntax '`'
 | .....^
ERROR: <input>:1:9: missing ')' at '<EOF>'
 | has(.`.`
 | ........^
 | ........^
Loading

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Jun 17, 2026
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Refine iteration variable validation in CEL macros.
#1096
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9 changes: 7 additions & 2 deletions
extensions/src/main/java/dev/cel/extensions/CelComprehensionsExtensions.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -479,9 +479,8 @@ private static Optional<CelExpr> transformMapEntryMacro(

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {

 CelExpr arg = checkNotNull(argument);
 if (arg.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
Expand All@@ -490,6 +489,12 @@ private static CelExpr validatedIterationVariable(
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
Expand Down

51 changes: 38 additions & 13 deletions
parser/src/main/java/dev/cel/parser/CelStandardMacro.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -122,9 +122,9 @@ private static Optional<CelExpr> expandAllMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(true);
Expand DownExpand Up@@ -155,9 +155,9 @@ private static Optional<CelExpr> expandExistsMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newBoolLiteral(false);
Expand DownExpand Up@@ -190,9 +190,9 @@ private static Optional<CelExpr> expandExistsOneMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newIntLiteral(0);
Expand DownExpand Up@@ -228,12 +228,9 @@ private static Optional<CelExpr> expandMapMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2 || arguments.size() == 3);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(
 exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(arg0), "argument is not an identifier")));
 return Optional.of(arg0);
 }
 CelExpr arg1;
 CelExpr arg2;
Expand DownExpand Up@@ -276,9 +273,9 @@ private static Optional<CelExpr> expandFilterMacro(
 checkNotNull(exprFactory);
 checkNotNull(target);
 checkArgument(arguments.size() == 2);
 CelExpr arg0 = checkNotNull(arguments.get(0));
 CelExpr arg0 = validatedIterationVariable(exprFactory, arguments.get(0));
 if (arg0.exprKind().getKind() != CelExpr.ExprKind.Kind.IDENT) {
 return Optional.of(reportArgumentError(exprFactory, arg0));
 return Optional.of(arg0);
 }
 CelExpr arg1 = checkNotNull(arguments.get(1));
 CelExpr accuInit = exprFactory.newList();
Expand All@@ -305,9 +302,37 @@ private static Optional<CelExpr> expandFilterMacro(
 exprFactory.newIdentifier(exprFactory.getAccumulatorVarName())));
 }

 private static CelExpr validatedIterationVariable(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 CelExpr arg = checkNotNull(argument);
 if (!isSimpleIdentifier(arg)) {
 return reportArgumentError(exprFactory, arg);
 } else if (arg.exprKind().ident().name().equals("__result__")) {
 return reportAccumulatorOverwriteError(exprFactory, arg);
 } else {
 return arg;
 }
 }

 private static boolean isSimpleIdentifier(CelExpr expr) {
 return expr.getKind() == CelExpr.ExprKind.Kind.IDENT
 && !expr.ident().name().isEmpty()
 && !expr.ident().name().startsWith(".");
 }

 private static CelExpr reportArgumentError(CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument), "The argument must be a simple name"));
 }

 private static CelExpr reportAccumulatorOverwriteError(
 CelMacroExprFactory exprFactory, CelExpr argument) {
 return exprFactory.reportError(
 CelIssue.formatError(
 exprFactory.getSourceLocation(argument),
 String.format(
 "The iteration variable %s overwrites accumulator variable",
 argument.ident().name())));
 }
}

10 changes: 10 additions & 0 deletions
parser/src/test/java/dev/cel/parser/CelParserParameterizedTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -245,6 +245,16 @@ public void parser_errors() {
 runTest(PARSER, "1 + $");
 runTest(PARSER, "1.all(2, 3)");
 runTest(PARSER, "1.exists(2, 3)");
 runTest(PARSER, "[].all(__result__, x)");
 runTest(PARSER, "[].exists(__result__, x)");
 runTest(PARSER, "[].exists_one(__result__, x)");
 runTest(PARSER, "[].map(__result__, x, x)");
 runTest(PARSER, "[].filter(__result__, x)");
 runTest(PARSER, "[].all(.x, x)");
 runTest(PARSER, "[].exists(.x, x)");
 runTest(PARSER, "[].exists_one(.x, x)");
 runTest(PARSER, "[].map(.x, x, x)");
 runTest(PARSER, "[].filter(.x, x)");
 runTest(PARSER, "1 + +");
 runTest(PARSER, "\"\\xFh\"");
 runTest(PARSER, "\"\\a\\b\\f\\n\\r\\t\\v\\'\\\"\\\\\\? Illegal escape \\>\"");
Expand Down

64 changes: 62 additions & 2 deletions
parser/src/test/resources/parser_errors.baseline

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -52,6 +52,66 @@ E: ERROR: <input>:1:10: The argument must be a simple name
 | 1.exists(2, 3)
 | .........^

I: [].all(__result__, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].all(__result__, x)
 | .......^

I: [].exists(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].exists(__result__, x)
 | ..........^

I: [].exists_one(__result__, x)
=====>
E: ERROR: <input>:1:15: The iteration variable __result__ overwrites accumulator variable
 | [].exists_one(__result__, x)
 | ..............^

I: [].map(__result__, x, x)
=====>
E: ERROR: <input>:1:8: The iteration variable __result__ overwrites accumulator variable
 | [].map(__result__, x, x)
 | .......^

I: [].filter(__result__, x)
=====>
E: ERROR: <input>:1:11: The iteration variable __result__ overwrites accumulator variable
 | [].filter(__result__, x)
 | ..........^

I: [].all(.x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].all(.x, x)
 | ........^

I: [].exists(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].exists(.x, x)
 | ...........^

I: [].exists_one(.x, x)
=====>
E: ERROR: <input>:1:16: The argument must be a simple name
 | [].exists_one(.x, x)
 | ...............^

I: [].map(.x, x, x)
=====>
E: ERROR: <input>:1:9: The argument must be a simple name
 | [].map(.x, x, x)
 | ........^

I: [].filter(.x, x)
=====>
E: ERROR: <input>:1:12: The argument must be a simple name
 | [].filter(.x, x)
 | ...........^

I: 1 + +
=====>
E: ERROR: <input>:1:5: mismatched input '+' expecting {'[', '{', '(', '.', '-', '!', 'true', 'false', 'null', NUM_FLOAT, NUM_INT, NUM_UINT, STRING, BYTES, IDENTIFIER}
Expand DownExpand Up@@ -219,7 +279,7 @@ I: [1, 2, 3].map(var, var * var)
E: ERROR: <input>:1:15: reserved identifier: var
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:15: argument is not an identifier
ERROR: <input>:1:15: The argument must be a simple name
 | [1, 2, 3].map(var, var * var)
 | ..............^
ERROR: <input>:1:20: reserved identifier: var
Expand DownExpand Up@@ -362,4 +422,4 @@ ERROR: <input>:1:6: unsupported syntax '`'
 | .....^
ERROR: <input>:1:9: missing ')' at '<EOF>'
 | has(.`.`
 | ........^
 | ........^
Loading