Add an axiom for optional.ofZeroValue for verifier#1138

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copybara-service merged 1 commit into from
Jul 23, 2026
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Add an axiom for optional.ofZeroValue for verifier #1138

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38 changes: 38 additions & 0 deletions verifier/src/main/java/dev/cel/verifier/axioms/OptionalAxioms.java
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -15,13 +15,19 @@
package dev.cel.verifier.axioms;

import com.google.common.collect.ImmutableList;
import com.microsoft.z3.BoolExpr;
import com.microsoft.z3.Context;
import com.microsoft.z3.Expr;
import com.microsoft.z3.FPExpr;
import com.microsoft.z3.SeqExpr;
import dev.cel.common.CelFunctionDecl;
import dev.cel.extensions.CelOptionalLibrary;
import dev.cel.extensions.CelOptionalLibrary.Function;
import dev.cel.verifier.CelZ3TypeSystem;
import java.util.Optional;

/** Axiomatization for CEL's optional library functions. */
@SuppressWarnings({"unchecked", "rawtypes"}) // Z3 Java API uses raw types.
final class OptionalAxioms {

static final ImmutableList<CelZ3FunctionAxiom> ALL_AXIOMS =
Expand All@@ -40,6 +46,17 @@ final class OptionalAxioms {
sink.accept(ts.optHasValue(optRef));
return Optional.of(ts.mkOptionalOf(optRef));
}),
createUnaryAxiom(
Function.OPTIONAL_OF_NON_ZERO_VALUE,
"optional_ofNonZeroValue",
(ctx, ts, sink, value) -> {
Expr<?> optRef = ctx.mkApp(ts.optionalOfRefFunc(), value);
BoolExpr isZero = isZeroValue(ctx, ts, value);
sink.accept(
ctx.mkImplies(ctx.mkNot(isZero), ctx.mkEq(ts.getOptionalValue(optRef), value)));
sink.accept(ctx.mkImplies(ctx.mkNot(isZero), ts.optHasValue(optRef)));
return Optional.of(ctx.mkITE(isZero, ts.mkOptionalNone(), ts.mkOptionalOf(optRef)));
}),
createUnaryAxiom(
Function.HAS_VALUE,
"optional_hasValue",
Expand DownExpand Up@@ -69,6 +86,27 @@ final class OptionalAxioms {
return Optional.of(ctx.mkITE(ts.optHasValue(optRef), val, other));
}));

private static BoolExpr isZeroValue(Context ctx, CelZ3TypeSystem ts, Expr<?> val) {
return ctx.mkOr(
ts.isNull(val),
ctx.mkAnd(ts.isBool(val), ctx.mkEq(ts.unwrapBool(val), ctx.mkFalse())),
ctx.mkAnd(ts.isInt(val), ctx.mkEq(ts.getInt(val), ctx.mkInt(0))),
ctx.mkAnd(ts.isUint(val), ctx.mkEq(ts.getUint(val), ctx.mkInt(0))),
ctx.mkAnd(ts.isDouble(val), ctx.mkFPIsZero((FPExpr) ts.getDouble(val))),
ctx.mkAnd(ts.isString(val), ctx.mkEq(ts.getString(val), ctx.mkString(""))),
ctx.mkAnd(
ts.isBytes(val), ctx.mkEq(ctx.mkLength((SeqExpr) ts.getBytes(val)), ctx.mkInt(0))),
ctx.mkAnd(
ts.isList(val), ctx.mkEq(ctx.mkLength(ts.getSeq(ts.getListRef(val))), ctx.mkInt(0))),
ctx.mkAnd(
ts.isMap(val), ctx.mkEq(ctx.mkLength(ts.getMapKeys(ts.getMapRef(val))), ctx.mkInt(0))),
ctx.mkAnd(
ts.isMessage(val),
ctx.mkEq(
ts.getMsgPresence(ts.getMessageRef(val)),
ctx.mkConstArray(ctx.getStringSort(), ctx.mkFalse()))));
}

private static CelFunctionDecl getDecl(Function funcEnum) {
return CelOptionalLibrary.INSTANCE.functions().stream()
.filter(d -> d.name().equals(funcEnum.getFunction()))
Expand Down
25 changes: 25 additions & 0 deletions verifier/src/test/java/dev/cel/verifier/CelVerifierZ3ImplTest.java
View file
Open in desktop
Original file line numberDiff line numberDiff line change
Expand Up@@ -1393,6 +1393,31 @@ private enum EquivalenceTestCase {
OPTIONAL_VALUE_EQUIVALENCE("optional.of(x).value()", "x"),
OPTIONAL_HAS_VALUE_EQUIVALENCE("optional.of(x).hasValue()", "true"),
OPTIONAL_NONE_HAS_VALUE_EQUIVALENCE("optional.none().hasValue()", "false"),
OPTIONAL_OF_NON_ZERO_VALUE_ARITHMETIC_EQUIVALENCE(
"[optional.ofNonZeroValue(1 + 2 + 3)]", "[optional.of(6)]"),
OPTIONAL_OF_NON_ZERO_VALUE_INT_ZERO_EQUIVALENCE(
"optional.ofNonZeroValue(0)", "optional.none()"),
OPTIONAL_OF_NON_ZERO_VALUE_INT_NON_ZERO_EQUIVALENCE(
"optional.ofNonZeroValue(5)", "optional.of(5)"),
OPTIONAL_OF_NON_ZERO_VALUE_STRING_EMPTY_EQUIVALENCE(
"optional.ofNonZeroValue('')", "optional.none()"),
OPTIONAL_OF_NON_ZERO_VALUE_STRING_NON_EMPTY_EQUIVALENCE(
"optional.ofNonZeroValue('hi')", "optional.of('hi')"),
OPTIONAL_OF_NON_ZERO_VALUE_BOOL_FALSE_EQUIVALENCE(
"optional.ofNonZeroValue(false)", "optional.none()"),
OPTIONAL_OF_NON_ZERO_VALUE_BOOL_TRUE_EQUIVALENCE(
"optional.ofNonZeroValue(true)", "optional.of(true)"),
OPTIONAL_OF_NON_ZERO_VALUE_DOUBLE_ZERO_EQUIVALENCE(
"optional.ofNonZeroValue(0.0)", "optional.none()"),
OPTIONAL_OF_NON_ZERO_VALUE_UINT_ZERO_EQUIVALENCE(
"optional.ofNonZeroValue(0u)", "optional.none()"),
OPTIONAL_OF_NON_ZERO_VALUE_LIST_EMPTY_EQUIVALENCE(
"optional.ofNonZeroValue([])", "optional.none()"),
OPTIONAL_OF_NON_ZERO_VALUE_MAP_EMPTY_EQUIVALENCE(
"optional.ofNonZeroValue({})", "optional.none()"),
OPTIONAL_OF_NON_ZERO_VALUE_BYTES_EMPTY_EQUIVALENCE(
"optional.ofNonZeroValue(b'')", "optional.none()"),
OPTIONAL_OF_NON_ZERO_VALUE_NULL_EQUIVALENCE("optional.ofNonZeroValue(null)", "optional.none()"),
FUNCTIONS("size(\"abc\") == size(role)", "size(role) == size(\"abc\")"),
NOT_EQUALS("x != y", "!(x == y)"),
LESS("x < y", "y > x"),
Expand Down
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" + '

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Add an axiom for optional.ofZeroValue for verifier#1138

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 Merged

copybara-service
merged 1 commit into

from

Jul 23, 2026
 Merged


Add an axiom for optional.ofZeroValue for verifier
#1138
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38 changes: 38 additions & 0 deletions
verifier/src/main/java/dev/cel/verifier/axioms/OptionalAxioms.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,13 +15,19 @@
package dev.cel.verifier.axioms;

import com.google.common.collect.ImmutableList;
import com.microsoft.z3.BoolExpr;
import com.microsoft.z3.Context;
import com.microsoft.z3.Expr;
import com.microsoft.z3.FPExpr;
import com.microsoft.z3.SeqExpr;
import dev.cel.common.CelFunctionDecl;
import dev.cel.extensions.CelOptionalLibrary;
import dev.cel.extensions.CelOptionalLibrary.Function;
import dev.cel.verifier.CelZ3TypeSystem;
import java.util.Optional;

/** Axiomatization for CEL's optional library functions. */
@SuppressWarnings({"unchecked", "rawtypes"}) // Z3 Java API uses raw types.
final class OptionalAxioms {

 static final ImmutableList<CelZ3FunctionAxiom> ALL_AXIOMS =
Expand All@@ -40,6 +46,17 @@ final class OptionalAxioms {
 sink.accept(ts.optHasValue(optRef));
 return Optional.of(ts.mkOptionalOf(optRef));
 }),
 createUnaryAxiom(
 Function.OPTIONAL_OF_NON_ZERO_VALUE,
 "optional_ofNonZeroValue",
 (ctx, ts, sink, value) -> {
 Expr<?> optRef = ctx.mkApp(ts.optionalOfRefFunc(), value);
 BoolExpr isZero = isZeroValue(ctx, ts, value);
 sink.accept(
 ctx.mkImplies(ctx.mkNot(isZero), ctx.mkEq(ts.getOptionalValue(optRef), value)));
 sink.accept(ctx.mkImplies(ctx.mkNot(isZero), ts.optHasValue(optRef)));
 return Optional.of(ctx.mkITE(isZero, ts.mkOptionalNone(), ts.mkOptionalOf(optRef)));
 }),
 createUnaryAxiom(
 Function.HAS_VALUE,
 "optional_hasValue",
Expand DownExpand Up@@ -69,6 +86,27 @@ final class OptionalAxioms {
 return Optional.of(ctx.mkITE(ts.optHasValue(optRef), val, other));
 }));

 private static BoolExpr isZeroValue(Context ctx, CelZ3TypeSystem ts, Expr<?> val) {
 return ctx.mkOr(
 ts.isNull(val),
 ctx.mkAnd(ts.isBool(val), ctx.mkEq(ts.unwrapBool(val), ctx.mkFalse())),
 ctx.mkAnd(ts.isInt(val), ctx.mkEq(ts.getInt(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isUint(val), ctx.mkEq(ts.getUint(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isDouble(val), ctx.mkFPIsZero((FPExpr) ts.getDouble(val))),
 ctx.mkAnd(ts.isString(val), ctx.mkEq(ts.getString(val), ctx.mkString(""))),
 ctx.mkAnd(
 ts.isBytes(val), ctx.mkEq(ctx.mkLength((SeqExpr) ts.getBytes(val)), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isList(val), ctx.mkEq(ctx.mkLength(ts.getSeq(ts.getListRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMap(val), ctx.mkEq(ctx.mkLength(ts.getMapKeys(ts.getMapRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMessage(val),
 ctx.mkEq(
 ts.getMsgPresence(ts.getMessageRef(val)),
 ctx.mkConstArray(ctx.getStringSort(), ctx.mkFalse()))));
 }

 private static CelFunctionDecl getDecl(Function funcEnum) {
 return CelOptionalLibrary.INSTANCE.functions().stream()
 .filter(d -> d.name().equals(funcEnum.getFunction()))
Expand Down

25 changes: 25 additions & 0 deletions
verifier/src/test/java/dev/cel/verifier/CelVerifierZ3ImplTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1393,6 +1393,31 @@ private enum EquivalenceTestCase {
 OPTIONAL_VALUE_EQUIVALENCE("optional.of(x).value()", "x"),
 OPTIONAL_HAS_VALUE_EQUIVALENCE("optional.of(x).hasValue()", "true"),
 OPTIONAL_NONE_HAS_VALUE_EQUIVALENCE("optional.none().hasValue()", "false"),
 OPTIONAL_OF_NON_ZERO_VALUE_ARITHMETIC_EQUIVALENCE(
 "[optional.ofNonZeroValue(1 + 2 + 3)]", "[optional.of(6)]"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_NON_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(5)", "optional.of(5)"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_NON_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('hi')", "optional.of('hi')"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_FALSE_EQUIVALENCE(
 "optional.ofNonZeroValue(false)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_TRUE_EQUIVALENCE(
 "optional.ofNonZeroValue(true)", "optional.of(true)"),
 OPTIONAL_OF_NON_ZERO_VALUE_DOUBLE_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0.0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_UINT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0u)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_LIST_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue([])", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_MAP_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue({})", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BYTES_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue(b'')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_NULL_EQUIVALENCE("optional.ofNonZeroValue(null)", "optional.none()"),
 FUNCTIONS("size(\"abc\") == size(role)", "size(role) == size(\"abc\")"),
 NOT_EQUALS("x != y", "!(x == y)"),
 LESS("x < y", "y > x"),
Expand Down
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('^' + ".*" + '

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Add an axiom for optional.ofZeroValue for verifier#1138

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 Merged

copybara-service
merged 1 commit into

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Jul 23, 2026
 Merged


Add an axiom for optional.ofZeroValue for verifier
#1138
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38 changes: 38 additions & 0 deletions
verifier/src/main/java/dev/cel/verifier/axioms/OptionalAxioms.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,13 +15,19 @@
package dev.cel.verifier.axioms;

import com.google.common.collect.ImmutableList;
import com.microsoft.z3.BoolExpr;
import com.microsoft.z3.Context;
import com.microsoft.z3.Expr;
import com.microsoft.z3.FPExpr;
import com.microsoft.z3.SeqExpr;
import dev.cel.common.CelFunctionDecl;
import dev.cel.extensions.CelOptionalLibrary;
import dev.cel.extensions.CelOptionalLibrary.Function;
import dev.cel.verifier.CelZ3TypeSystem;
import java.util.Optional;

/** Axiomatization for CEL's optional library functions. */
@SuppressWarnings({"unchecked", "rawtypes"}) // Z3 Java API uses raw types.
final class OptionalAxioms {

 static final ImmutableList<CelZ3FunctionAxiom> ALL_AXIOMS =
Expand All@@ -40,6 +46,17 @@ final class OptionalAxioms {
 sink.accept(ts.optHasValue(optRef));
 return Optional.of(ts.mkOptionalOf(optRef));
 }),
 createUnaryAxiom(
 Function.OPTIONAL_OF_NON_ZERO_VALUE,
 "optional_ofNonZeroValue",
 (ctx, ts, sink, value) -> {
 Expr<?> optRef = ctx.mkApp(ts.optionalOfRefFunc(), value);
 BoolExpr isZero = isZeroValue(ctx, ts, value);
 sink.accept(
 ctx.mkImplies(ctx.mkNot(isZero), ctx.mkEq(ts.getOptionalValue(optRef), value)));
 sink.accept(ctx.mkImplies(ctx.mkNot(isZero), ts.optHasValue(optRef)));
 return Optional.of(ctx.mkITE(isZero, ts.mkOptionalNone(), ts.mkOptionalOf(optRef)));
 }),
 createUnaryAxiom(
 Function.HAS_VALUE,
 "optional_hasValue",
Expand DownExpand Up@@ -69,6 +86,27 @@ final class OptionalAxioms {
 return Optional.of(ctx.mkITE(ts.optHasValue(optRef), val, other));
 }));

 private static BoolExpr isZeroValue(Context ctx, CelZ3TypeSystem ts, Expr<?> val) {
 return ctx.mkOr(
 ts.isNull(val),
 ctx.mkAnd(ts.isBool(val), ctx.mkEq(ts.unwrapBool(val), ctx.mkFalse())),
 ctx.mkAnd(ts.isInt(val), ctx.mkEq(ts.getInt(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isUint(val), ctx.mkEq(ts.getUint(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isDouble(val), ctx.mkFPIsZero((FPExpr) ts.getDouble(val))),
 ctx.mkAnd(ts.isString(val), ctx.mkEq(ts.getString(val), ctx.mkString(""))),
 ctx.mkAnd(
 ts.isBytes(val), ctx.mkEq(ctx.mkLength((SeqExpr) ts.getBytes(val)), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isList(val), ctx.mkEq(ctx.mkLength(ts.getSeq(ts.getListRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMap(val), ctx.mkEq(ctx.mkLength(ts.getMapKeys(ts.getMapRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMessage(val),
 ctx.mkEq(
 ts.getMsgPresence(ts.getMessageRef(val)),
 ctx.mkConstArray(ctx.getStringSort(), ctx.mkFalse()))));
 }

 private static CelFunctionDecl getDecl(Function funcEnum) {
 return CelOptionalLibrary.INSTANCE.functions().stream()
 .filter(d -> d.name().equals(funcEnum.getFunction()))
Expand Down

25 changes: 25 additions & 0 deletions
verifier/src/test/java/dev/cel/verifier/CelVerifierZ3ImplTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1393,6 +1393,31 @@ private enum EquivalenceTestCase {
 OPTIONAL_VALUE_EQUIVALENCE("optional.of(x).value()", "x"),
 OPTIONAL_HAS_VALUE_EQUIVALENCE("optional.of(x).hasValue()", "true"),
 OPTIONAL_NONE_HAS_VALUE_EQUIVALENCE("optional.none().hasValue()", "false"),
 OPTIONAL_OF_NON_ZERO_VALUE_ARITHMETIC_EQUIVALENCE(
 "[optional.ofNonZeroValue(1 + 2 + 3)]", "[optional.of(6)]"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_NON_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(5)", "optional.of(5)"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_NON_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('hi')", "optional.of('hi')"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_FALSE_EQUIVALENCE(
 "optional.ofNonZeroValue(false)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_TRUE_EQUIVALENCE(
 "optional.ofNonZeroValue(true)", "optional.of(true)"),
 OPTIONAL_OF_NON_ZERO_VALUE_DOUBLE_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0.0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_UINT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0u)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_LIST_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue([])", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_MAP_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue({})", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BYTES_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue(b'')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_NULL_EQUIVALENCE("optional.ofNonZeroValue(null)", "optional.none()"),
 FUNCTIONS("size(\"abc\") == size(role)", "size(role) == size(\"abc\")"),
 NOT_EQUALS("x != y", "!(x == y)"),
 LESS("x < y", "y > x"),
Expand Down
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('^' + ".*" + '

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Add an axiom for optional.ofZeroValue for verifier#1138

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Add an axiom for optional.ofZeroValue for verifier
#1138
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38 changes: 38 additions & 0 deletions
verifier/src/main/java/dev/cel/verifier/axioms/OptionalAxioms.java

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Original file line numberDiff line numberDiff line change
Expand Up@@ -15,13 +15,19 @@
package dev.cel.verifier.axioms;

import com.google.common.collect.ImmutableList;
import com.microsoft.z3.BoolExpr;
import com.microsoft.z3.Context;
import com.microsoft.z3.Expr;
import com.microsoft.z3.FPExpr;
import com.microsoft.z3.SeqExpr;
import dev.cel.common.CelFunctionDecl;
import dev.cel.extensions.CelOptionalLibrary;
import dev.cel.extensions.CelOptionalLibrary.Function;
import dev.cel.verifier.CelZ3TypeSystem;
import java.util.Optional;

/** Axiomatization for CEL's optional library functions. */
@SuppressWarnings({"unchecked", "rawtypes"}) // Z3 Java API uses raw types.
final class OptionalAxioms {

 static final ImmutableList<CelZ3FunctionAxiom> ALL_AXIOMS =
Expand All@@ -40,6 +46,17 @@ final class OptionalAxioms {
 sink.accept(ts.optHasValue(optRef));
 return Optional.of(ts.mkOptionalOf(optRef));
 }),
 createUnaryAxiom(
 Function.OPTIONAL_OF_NON_ZERO_VALUE,
 "optional_ofNonZeroValue",
 (ctx, ts, sink, value) -> {
 Expr<?> optRef = ctx.mkApp(ts.optionalOfRefFunc(), value);
 BoolExpr isZero = isZeroValue(ctx, ts, value);
 sink.accept(
 ctx.mkImplies(ctx.mkNot(isZero), ctx.mkEq(ts.getOptionalValue(optRef), value)));
 sink.accept(ctx.mkImplies(ctx.mkNot(isZero), ts.optHasValue(optRef)));
 return Optional.of(ctx.mkITE(isZero, ts.mkOptionalNone(), ts.mkOptionalOf(optRef)));
 }),
 createUnaryAxiom(
 Function.HAS_VALUE,
 "optional_hasValue",
Expand DownExpand Up@@ -69,6 +86,27 @@ final class OptionalAxioms {
 return Optional.of(ctx.mkITE(ts.optHasValue(optRef), val, other));
 }));

 private static BoolExpr isZeroValue(Context ctx, CelZ3TypeSystem ts, Expr<?> val) {
 return ctx.mkOr(
 ts.isNull(val),
 ctx.mkAnd(ts.isBool(val), ctx.mkEq(ts.unwrapBool(val), ctx.mkFalse())),
 ctx.mkAnd(ts.isInt(val), ctx.mkEq(ts.getInt(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isUint(val), ctx.mkEq(ts.getUint(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isDouble(val), ctx.mkFPIsZero((FPExpr) ts.getDouble(val))),
 ctx.mkAnd(ts.isString(val), ctx.mkEq(ts.getString(val), ctx.mkString(""))),
 ctx.mkAnd(
 ts.isBytes(val), ctx.mkEq(ctx.mkLength((SeqExpr) ts.getBytes(val)), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isList(val), ctx.mkEq(ctx.mkLength(ts.getSeq(ts.getListRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMap(val), ctx.mkEq(ctx.mkLength(ts.getMapKeys(ts.getMapRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMessage(val),
 ctx.mkEq(
 ts.getMsgPresence(ts.getMessageRef(val)),
 ctx.mkConstArray(ctx.getStringSort(), ctx.mkFalse()))));
 }

 private static CelFunctionDecl getDecl(Function funcEnum) {
 return CelOptionalLibrary.INSTANCE.functions().stream()
 .filter(d -> d.name().equals(funcEnum.getFunction()))
Expand Down

25 changes: 25 additions & 0 deletions
verifier/src/test/java/dev/cel/verifier/CelVerifierZ3ImplTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1393,6 +1393,31 @@ private enum EquivalenceTestCase {
 OPTIONAL_VALUE_EQUIVALENCE("optional.of(x).value()", "x"),
 OPTIONAL_HAS_VALUE_EQUIVALENCE("optional.of(x).hasValue()", "true"),
 OPTIONAL_NONE_HAS_VALUE_EQUIVALENCE("optional.none().hasValue()", "false"),
 OPTIONAL_OF_NON_ZERO_VALUE_ARITHMETIC_EQUIVALENCE(
 "[optional.ofNonZeroValue(1 + 2 + 3)]", "[optional.of(6)]"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_NON_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(5)", "optional.of(5)"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_NON_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('hi')", "optional.of('hi')"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_FALSE_EQUIVALENCE(
 "optional.ofNonZeroValue(false)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_TRUE_EQUIVALENCE(
 "optional.ofNonZeroValue(true)", "optional.of(true)"),
 OPTIONAL_OF_NON_ZERO_VALUE_DOUBLE_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0.0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_UINT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0u)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_LIST_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue([])", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_MAP_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue({})", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BYTES_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue(b'')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_NULL_EQUIVALENCE("optional.ofNonZeroValue(null)", "optional.none()"),
 FUNCTIONS("size(\"abc\") == size(role)", "size(role) == size(\"abc\")"),
 NOT_EQUALS("x != y", "!(x == y)"),
 LESS("x < y", "y > x"),
Expand Down
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" + '

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Add an axiom for optional.ofZeroValue for verifier#1138

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 Merged

copybara-service
merged 1 commit into

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Jul 23, 2026
 Merged


Add an axiom for optional.ofZeroValue for verifier
#1138
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38 changes: 38 additions & 0 deletions
verifier/src/main/java/dev/cel/verifier/axioms/OptionalAxioms.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,13 +15,19 @@
package dev.cel.verifier.axioms;

import com.google.common.collect.ImmutableList;
import com.microsoft.z3.BoolExpr;
import com.microsoft.z3.Context;
import com.microsoft.z3.Expr;
import com.microsoft.z3.FPExpr;
import com.microsoft.z3.SeqExpr;
import dev.cel.common.CelFunctionDecl;
import dev.cel.extensions.CelOptionalLibrary;
import dev.cel.extensions.CelOptionalLibrary.Function;
import dev.cel.verifier.CelZ3TypeSystem;
import java.util.Optional;

/** Axiomatization for CEL's optional library functions. */
@SuppressWarnings({"unchecked", "rawtypes"}) // Z3 Java API uses raw types.
final class OptionalAxioms {

 static final ImmutableList<CelZ3FunctionAxiom> ALL_AXIOMS =
Expand All@@ -40,6 +46,17 @@ final class OptionalAxioms {
 sink.accept(ts.optHasValue(optRef));
 return Optional.of(ts.mkOptionalOf(optRef));
 }),
 createUnaryAxiom(
 Function.OPTIONAL_OF_NON_ZERO_VALUE,
 "optional_ofNonZeroValue",
 (ctx, ts, sink, value) -> {
 Expr<?> optRef = ctx.mkApp(ts.optionalOfRefFunc(), value);
 BoolExpr isZero = isZeroValue(ctx, ts, value);
 sink.accept(
 ctx.mkImplies(ctx.mkNot(isZero), ctx.mkEq(ts.getOptionalValue(optRef), value)));
 sink.accept(ctx.mkImplies(ctx.mkNot(isZero), ts.optHasValue(optRef)));
 return Optional.of(ctx.mkITE(isZero, ts.mkOptionalNone(), ts.mkOptionalOf(optRef)));
 }),
 createUnaryAxiom(
 Function.HAS_VALUE,
 "optional_hasValue",
Expand DownExpand Up@@ -69,6 +86,27 @@ final class OptionalAxioms {
 return Optional.of(ctx.mkITE(ts.optHasValue(optRef), val, other));
 }));

 private static BoolExpr isZeroValue(Context ctx, CelZ3TypeSystem ts, Expr<?> val) {
 return ctx.mkOr(
 ts.isNull(val),
 ctx.mkAnd(ts.isBool(val), ctx.mkEq(ts.unwrapBool(val), ctx.mkFalse())),
 ctx.mkAnd(ts.isInt(val), ctx.mkEq(ts.getInt(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isUint(val), ctx.mkEq(ts.getUint(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isDouble(val), ctx.mkFPIsZero((FPExpr) ts.getDouble(val))),
 ctx.mkAnd(ts.isString(val), ctx.mkEq(ts.getString(val), ctx.mkString(""))),
 ctx.mkAnd(
 ts.isBytes(val), ctx.mkEq(ctx.mkLength((SeqExpr) ts.getBytes(val)), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isList(val), ctx.mkEq(ctx.mkLength(ts.getSeq(ts.getListRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMap(val), ctx.mkEq(ctx.mkLength(ts.getMapKeys(ts.getMapRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMessage(val),
 ctx.mkEq(
 ts.getMsgPresence(ts.getMessageRef(val)),
 ctx.mkConstArray(ctx.getStringSort(), ctx.mkFalse()))));
 }

 private static CelFunctionDecl getDecl(Function funcEnum) {
 return CelOptionalLibrary.INSTANCE.functions().stream()
 .filter(d -> d.name().equals(funcEnum.getFunction()))
Expand Down

25 changes: 25 additions & 0 deletions
verifier/src/test/java/dev/cel/verifier/CelVerifierZ3ImplTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1393,6 +1393,31 @@ private enum EquivalenceTestCase {
 OPTIONAL_VALUE_EQUIVALENCE("optional.of(x).value()", "x"),
 OPTIONAL_HAS_VALUE_EQUIVALENCE("optional.of(x).hasValue()", "true"),
 OPTIONAL_NONE_HAS_VALUE_EQUIVALENCE("optional.none().hasValue()", "false"),
 OPTIONAL_OF_NON_ZERO_VALUE_ARITHMETIC_EQUIVALENCE(
 "[optional.ofNonZeroValue(1 + 2 + 3)]", "[optional.of(6)]"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_NON_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(5)", "optional.of(5)"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_NON_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('hi')", "optional.of('hi')"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_FALSE_EQUIVALENCE(
 "optional.ofNonZeroValue(false)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_TRUE_EQUIVALENCE(
 "optional.ofNonZeroValue(true)", "optional.of(true)"),
 OPTIONAL_OF_NON_ZERO_VALUE_DOUBLE_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0.0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_UINT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0u)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_LIST_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue([])", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_MAP_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue({})", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BYTES_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue(b'')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_NULL_EQUIVALENCE("optional.ofNonZeroValue(null)", "optional.none()"),
 FUNCTIONS("size(\"abc\") == size(role)", "size(role) == size(\"abc\")"),
 NOT_EQUALS("x != y", "!(x == y)"),
 LESS("x < y", "y > x"),
Expand Down
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('^' + ".*" + '

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Add an axiom for optional.ofZeroValue for verifier#1138

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 Merged

copybara-service
merged 1 commit into

from

Jul 23, 2026
 Merged


Add an axiom for optional.ofZeroValue for verifier
#1138
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38 changes: 38 additions & 0 deletions
verifier/src/main/java/dev/cel/verifier/axioms/OptionalAxioms.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,13 +15,19 @@
package dev.cel.verifier.axioms;

import com.google.common.collect.ImmutableList;
import com.microsoft.z3.BoolExpr;
import com.microsoft.z3.Context;
import com.microsoft.z3.Expr;
import com.microsoft.z3.FPExpr;
import com.microsoft.z3.SeqExpr;
import dev.cel.common.CelFunctionDecl;
import dev.cel.extensions.CelOptionalLibrary;
import dev.cel.extensions.CelOptionalLibrary.Function;
import dev.cel.verifier.CelZ3TypeSystem;
import java.util.Optional;

/** Axiomatization for CEL's optional library functions. */
@SuppressWarnings({"unchecked", "rawtypes"}) // Z3 Java API uses raw types.
final class OptionalAxioms {

 static final ImmutableList<CelZ3FunctionAxiom> ALL_AXIOMS =
Expand All@@ -40,6 +46,17 @@ final class OptionalAxioms {
 sink.accept(ts.optHasValue(optRef));
 return Optional.of(ts.mkOptionalOf(optRef));
 }),
 createUnaryAxiom(
 Function.OPTIONAL_OF_NON_ZERO_VALUE,
 "optional_ofNonZeroValue",
 (ctx, ts, sink, value) -> {
 Expr<?> optRef = ctx.mkApp(ts.optionalOfRefFunc(), value);
 BoolExpr isZero = isZeroValue(ctx, ts, value);
 sink.accept(
 ctx.mkImplies(ctx.mkNot(isZero), ctx.mkEq(ts.getOptionalValue(optRef), value)));
 sink.accept(ctx.mkImplies(ctx.mkNot(isZero), ts.optHasValue(optRef)));
 return Optional.of(ctx.mkITE(isZero, ts.mkOptionalNone(), ts.mkOptionalOf(optRef)));
 }),
 createUnaryAxiom(
 Function.HAS_VALUE,
 "optional_hasValue",
Expand DownExpand Up@@ -69,6 +86,27 @@ final class OptionalAxioms {
 return Optional.of(ctx.mkITE(ts.optHasValue(optRef), val, other));
 }));

 private static BoolExpr isZeroValue(Context ctx, CelZ3TypeSystem ts, Expr<?> val) {
 return ctx.mkOr(
 ts.isNull(val),
 ctx.mkAnd(ts.isBool(val), ctx.mkEq(ts.unwrapBool(val), ctx.mkFalse())),
 ctx.mkAnd(ts.isInt(val), ctx.mkEq(ts.getInt(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isUint(val), ctx.mkEq(ts.getUint(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isDouble(val), ctx.mkFPIsZero((FPExpr) ts.getDouble(val))),
 ctx.mkAnd(ts.isString(val), ctx.mkEq(ts.getString(val), ctx.mkString(""))),
 ctx.mkAnd(
 ts.isBytes(val), ctx.mkEq(ctx.mkLength((SeqExpr) ts.getBytes(val)), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isList(val), ctx.mkEq(ctx.mkLength(ts.getSeq(ts.getListRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMap(val), ctx.mkEq(ctx.mkLength(ts.getMapKeys(ts.getMapRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMessage(val),
 ctx.mkEq(
 ts.getMsgPresence(ts.getMessageRef(val)),
 ctx.mkConstArray(ctx.getStringSort(), ctx.mkFalse()))));
 }

 private static CelFunctionDecl getDecl(Function funcEnum) {
 return CelOptionalLibrary.INSTANCE.functions().stream()
 .filter(d -> d.name().equals(funcEnum.getFunction()))
Expand Down

25 changes: 25 additions & 0 deletions
verifier/src/test/java/dev/cel/verifier/CelVerifierZ3ImplTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1393,6 +1393,31 @@ private enum EquivalenceTestCase {
 OPTIONAL_VALUE_EQUIVALENCE("optional.of(x).value()", "x"),
 OPTIONAL_HAS_VALUE_EQUIVALENCE("optional.of(x).hasValue()", "true"),
 OPTIONAL_NONE_HAS_VALUE_EQUIVALENCE("optional.none().hasValue()", "false"),
 OPTIONAL_OF_NON_ZERO_VALUE_ARITHMETIC_EQUIVALENCE(
 "[optional.ofNonZeroValue(1 + 2 + 3)]", "[optional.of(6)]"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_NON_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(5)", "optional.of(5)"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_NON_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('hi')", "optional.of('hi')"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_FALSE_EQUIVALENCE(
 "optional.ofNonZeroValue(false)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_TRUE_EQUIVALENCE(
 "optional.ofNonZeroValue(true)", "optional.of(true)"),
 OPTIONAL_OF_NON_ZERO_VALUE_DOUBLE_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0.0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_UINT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0u)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_LIST_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue([])", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_MAP_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue({})", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BYTES_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue(b'')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_NULL_EQUIVALENCE("optional.ofNonZeroValue(null)", "optional.none()"),
 FUNCTIONS("size(\"abc\") == size(role)", "size(role) == size(\"abc\")"),
 NOT_EQUALS("x != y", "!(x == y)"),
 LESS("x < y", "y > x"),
Expand Down
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('^' + ".*" + '

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Add an axiom for optional.ofZeroValue for verifier#1138

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 Merged

copybara-service
merged 1 commit into

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Jul 23, 2026
 Merged


Add an axiom for optional.ofZeroValue for verifier
#1138
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38 changes: 38 additions & 0 deletions
verifier/src/main/java/dev/cel/verifier/axioms/OptionalAxioms.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,13 +15,19 @@
package dev.cel.verifier.axioms;

import com.google.common.collect.ImmutableList;
import com.microsoft.z3.BoolExpr;
import com.microsoft.z3.Context;
import com.microsoft.z3.Expr;
import com.microsoft.z3.FPExpr;
import com.microsoft.z3.SeqExpr;
import dev.cel.common.CelFunctionDecl;
import dev.cel.extensions.CelOptionalLibrary;
import dev.cel.extensions.CelOptionalLibrary.Function;
import dev.cel.verifier.CelZ3TypeSystem;
import java.util.Optional;

/** Axiomatization for CEL's optional library functions. */
@SuppressWarnings({"unchecked", "rawtypes"}) // Z3 Java API uses raw types.
final class OptionalAxioms {

 static final ImmutableList<CelZ3FunctionAxiom> ALL_AXIOMS =
Expand All@@ -40,6 +46,17 @@ final class OptionalAxioms {
 sink.accept(ts.optHasValue(optRef));
 return Optional.of(ts.mkOptionalOf(optRef));
 }),
 createUnaryAxiom(
 Function.OPTIONAL_OF_NON_ZERO_VALUE,
 "optional_ofNonZeroValue",
 (ctx, ts, sink, value) -> {
 Expr<?> optRef = ctx.mkApp(ts.optionalOfRefFunc(), value);
 BoolExpr isZero = isZeroValue(ctx, ts, value);
 sink.accept(
 ctx.mkImplies(ctx.mkNot(isZero), ctx.mkEq(ts.getOptionalValue(optRef), value)));
 sink.accept(ctx.mkImplies(ctx.mkNot(isZero), ts.optHasValue(optRef)));
 return Optional.of(ctx.mkITE(isZero, ts.mkOptionalNone(), ts.mkOptionalOf(optRef)));
 }),
 createUnaryAxiom(
 Function.HAS_VALUE,
 "optional_hasValue",
Expand DownExpand Up@@ -69,6 +86,27 @@ final class OptionalAxioms {
 return Optional.of(ctx.mkITE(ts.optHasValue(optRef), val, other));
 }));

 private static BoolExpr isZeroValue(Context ctx, CelZ3TypeSystem ts, Expr<?> val) {
 return ctx.mkOr(
 ts.isNull(val),
 ctx.mkAnd(ts.isBool(val), ctx.mkEq(ts.unwrapBool(val), ctx.mkFalse())),
 ctx.mkAnd(ts.isInt(val), ctx.mkEq(ts.getInt(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isUint(val), ctx.mkEq(ts.getUint(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isDouble(val), ctx.mkFPIsZero((FPExpr) ts.getDouble(val))),
 ctx.mkAnd(ts.isString(val), ctx.mkEq(ts.getString(val), ctx.mkString(""))),
 ctx.mkAnd(
 ts.isBytes(val), ctx.mkEq(ctx.mkLength((SeqExpr) ts.getBytes(val)), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isList(val), ctx.mkEq(ctx.mkLength(ts.getSeq(ts.getListRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMap(val), ctx.mkEq(ctx.mkLength(ts.getMapKeys(ts.getMapRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMessage(val),
 ctx.mkEq(
 ts.getMsgPresence(ts.getMessageRef(val)),
 ctx.mkConstArray(ctx.getStringSort(), ctx.mkFalse()))));
 }

 private static CelFunctionDecl getDecl(Function funcEnum) {
 return CelOptionalLibrary.INSTANCE.functions().stream()
 .filter(d -> d.name().equals(funcEnum.getFunction()))
Expand Down

25 changes: 25 additions & 0 deletions
verifier/src/test/java/dev/cel/verifier/CelVerifierZ3ImplTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1393,6 +1393,31 @@ private enum EquivalenceTestCase {
 OPTIONAL_VALUE_EQUIVALENCE("optional.of(x).value()", "x"),
 OPTIONAL_HAS_VALUE_EQUIVALENCE("optional.of(x).hasValue()", "true"),
 OPTIONAL_NONE_HAS_VALUE_EQUIVALENCE("optional.none().hasValue()", "false"),
 OPTIONAL_OF_NON_ZERO_VALUE_ARITHMETIC_EQUIVALENCE(
 "[optional.ofNonZeroValue(1 + 2 + 3)]", "[optional.of(6)]"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_NON_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(5)", "optional.of(5)"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_NON_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('hi')", "optional.of('hi')"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_FALSE_EQUIVALENCE(
 "optional.ofNonZeroValue(false)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_TRUE_EQUIVALENCE(
 "optional.ofNonZeroValue(true)", "optional.of(true)"),
 OPTIONAL_OF_NON_ZERO_VALUE_DOUBLE_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0.0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_UINT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0u)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_LIST_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue([])", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_MAP_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue({})", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BYTES_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue(b'')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_NULL_EQUIVALENCE("optional.ofNonZeroValue(null)", "optional.none()"),
 FUNCTIONS("size(\"abc\") == size(role)", "size(role) == size(\"abc\")"),
 NOT_EQUALS("x != y", "!(x == y)"),
 LESS("x < y", "y > x"),
Expand Down
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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Add an axiom for optional.ofZeroValue for verifier#1138

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Jul 23, 2026
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Add an axiom for optional.ofZeroValue for verifier
#1138
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38 changes: 38 additions & 0 deletions
verifier/src/main/java/dev/cel/verifier/axioms/OptionalAxioms.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -15,13 +15,19 @@
package dev.cel.verifier.axioms;

import com.google.common.collect.ImmutableList;
import com.microsoft.z3.BoolExpr;
import com.microsoft.z3.Context;
import com.microsoft.z3.Expr;
import com.microsoft.z3.FPExpr;
import com.microsoft.z3.SeqExpr;
import dev.cel.common.CelFunctionDecl;
import dev.cel.extensions.CelOptionalLibrary;
import dev.cel.extensions.CelOptionalLibrary.Function;
import dev.cel.verifier.CelZ3TypeSystem;
import java.util.Optional;

/** Axiomatization for CEL's optional library functions. */
@SuppressWarnings({"unchecked", "rawtypes"}) // Z3 Java API uses raw types.
final class OptionalAxioms {

 static final ImmutableList<CelZ3FunctionAxiom> ALL_AXIOMS =
Expand All@@ -40,6 +46,17 @@ final class OptionalAxioms {
 sink.accept(ts.optHasValue(optRef));
 return Optional.of(ts.mkOptionalOf(optRef));
 }),
 createUnaryAxiom(
 Function.OPTIONAL_OF_NON_ZERO_VALUE,
 "optional_ofNonZeroValue",
 (ctx, ts, sink, value) -> {
 Expr<?> optRef = ctx.mkApp(ts.optionalOfRefFunc(), value);
 BoolExpr isZero = isZeroValue(ctx, ts, value);
 sink.accept(
 ctx.mkImplies(ctx.mkNot(isZero), ctx.mkEq(ts.getOptionalValue(optRef), value)));
 sink.accept(ctx.mkImplies(ctx.mkNot(isZero), ts.optHasValue(optRef)));
 return Optional.of(ctx.mkITE(isZero, ts.mkOptionalNone(), ts.mkOptionalOf(optRef)));
 }),
 createUnaryAxiom(
 Function.HAS_VALUE,
 "optional_hasValue",
Expand DownExpand Up@@ -69,6 +86,27 @@ final class OptionalAxioms {
 return Optional.of(ctx.mkITE(ts.optHasValue(optRef), val, other));
 }));

 private static BoolExpr isZeroValue(Context ctx, CelZ3TypeSystem ts, Expr<?> val) {
 return ctx.mkOr(
 ts.isNull(val),
 ctx.mkAnd(ts.isBool(val), ctx.mkEq(ts.unwrapBool(val), ctx.mkFalse())),
 ctx.mkAnd(ts.isInt(val), ctx.mkEq(ts.getInt(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isUint(val), ctx.mkEq(ts.getUint(val), ctx.mkInt(0))),
 ctx.mkAnd(ts.isDouble(val), ctx.mkFPIsZero((FPExpr) ts.getDouble(val))),
 ctx.mkAnd(ts.isString(val), ctx.mkEq(ts.getString(val), ctx.mkString(""))),
 ctx.mkAnd(
 ts.isBytes(val), ctx.mkEq(ctx.mkLength((SeqExpr) ts.getBytes(val)), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isList(val), ctx.mkEq(ctx.mkLength(ts.getSeq(ts.getListRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMap(val), ctx.mkEq(ctx.mkLength(ts.getMapKeys(ts.getMapRef(val))), ctx.mkInt(0))),
 ctx.mkAnd(
 ts.isMessage(val),
 ctx.mkEq(
 ts.getMsgPresence(ts.getMessageRef(val)),
 ctx.mkConstArray(ctx.getStringSort(), ctx.mkFalse()))));
 }

 private static CelFunctionDecl getDecl(Function funcEnum) {
 return CelOptionalLibrary.INSTANCE.functions().stream()
 .filter(d -> d.name().equals(funcEnum.getFunction()))
Expand Down

25 changes: 25 additions & 0 deletions
verifier/src/test/java/dev/cel/verifier/CelVerifierZ3ImplTest.java

View file


Open in desktop

Original file line numberDiff line numberDiff line change
Expand Up@@ -1393,6 +1393,31 @@ private enum EquivalenceTestCase {
 OPTIONAL_VALUE_EQUIVALENCE("optional.of(x).value()", "x"),
 OPTIONAL_HAS_VALUE_EQUIVALENCE("optional.of(x).hasValue()", "true"),
 OPTIONAL_NONE_HAS_VALUE_EQUIVALENCE("optional.none().hasValue()", "false"),
 OPTIONAL_OF_NON_ZERO_VALUE_ARITHMETIC_EQUIVALENCE(
 "[optional.ofNonZeroValue(1 + 2 + 3)]", "[optional.of(6)]"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_INT_NON_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(5)", "optional.of(5)"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_STRING_NON_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue('hi')", "optional.of('hi')"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_FALSE_EQUIVALENCE(
 "optional.ofNonZeroValue(false)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BOOL_TRUE_EQUIVALENCE(
 "optional.ofNonZeroValue(true)", "optional.of(true)"),
 OPTIONAL_OF_NON_ZERO_VALUE_DOUBLE_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0.0)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_UINT_ZERO_EQUIVALENCE(
 "optional.ofNonZeroValue(0u)", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_LIST_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue([])", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_MAP_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue({})", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_BYTES_EMPTY_EQUIVALENCE(
 "optional.ofNonZeroValue(b'')", "optional.none()"),
 OPTIONAL_OF_NON_ZERO_VALUE_NULL_EQUIVALENCE("optional.ofNonZeroValue(null)", "optional.none()"),
 FUNCTIONS("size(\"abc\") == size(role)", "size(role) == size(\"abc\")"),
 NOT_EQUALS("x != y", "!(x == y)"),
 LESS("x < y", "y > x"),
Expand Down
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