Repository files navigation

The Cypher Front End Modules

Build Status

This repository holds a fully functional front end for the Cypher Property Graph Query Language. This includes a parser, an AST, semantic checking and analysis, and AST rewriting support. Its purpose is to assist anyone wanting to build tools, or working on implementing Cypher for database systems.

It is also the shared front end for Neo4j and Morpheus.

Overview of the included modules

  • AST

    • Contains the AST classes (except expressions), and the semantic analysis.

  • Expressions

    • This contains all expressions.

  • Front End

    • This module contains a prettifier for the AST, and infrastructure data structures for compiler pipelines.

  • Parser

    • Contains a parser for the Cypher Query Language.

  • Rewriting

    • This contains a set of AST rewriters that simplify and canonicalize the tree before further processing.

  • Util

    • Contains shared code and test utilities.

Why do the modules have the version number in the name?

A common feature for database systems is to allow backwards compatability for older releases of the software. This makes it possible to move over systems query by query to an updated version of the database. The names allow for two or more versions of compiler pipelines loaded at the same time. It makes it possible for us to release updated, binary incompatible versions of the front ends.

Disclaimer

This repository is not an official Neo4j product or project. It is maintained by Neo4j employees or contributors in a personal or experimental capacity. The content here is provided “as is,” comes with no guarantees, and is unsupported.

License

The openCypher project is licensed under the Apache license 2.0.

About

Parsing, AST and semantic analysis for the Cypher Query Language

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, '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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Repository files navigation

The Cypher Front End Modules

Build Status

This repository holds a fully functional front end for the Cypher Property Graph Query Language. This includes a parser, an AST, semantic checking and analysis, and AST rewriting support. Its purpose is to assist anyone wanting to build tools, or working on implementing Cypher for database systems.

It is also the shared front end for Neo4j and Morpheus.

Overview of the included modules

  • AST

    • Contains the AST classes (except expressions), and the semantic analysis.

  • Expressions

    • This contains all expressions.

  • Front End

    • This module contains a prettifier for the AST, and infrastructure data structures for compiler pipelines.

  • Parser

    • Contains a parser for the Cypher Query Language.

  • Rewriting

    • This contains a set of AST rewriters that simplify and canonicalize the tree before further processing.

  • Util

    • Contains shared code and test utilities.

Why do the modules have the version number in the name?

A common feature for database systems is to allow backwards compatability for older releases of the software. This makes it possible to move over systems query by query to an updated version of the database. The names allow for two or more versions of compiler pipelines loaded at the same time. It makes it possible for us to release updated, binary incompatible versions of the front ends.

Disclaimer

This repository is not an official Neo4j product or project. It is maintained by Neo4j employees or contributors in a personal or experimental capacity. The content here is provided “as is,” comes with no guarantees, and is unsupported.

License

The openCypher project is licensed under the Apache license 2.0.

About

Parsing, AST and semantic analysis for the Cypher Query Language

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60 stars

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18 watching

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, '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

Repository files navigation

The Cypher Front End Modules

Build Status

This repository holds a fully functional front end for the Cypher Property Graph Query Language. This includes a parser, an AST, semantic checking and analysis, and AST rewriting support. Its purpose is to assist anyone wanting to build tools, or working on implementing Cypher for database systems.

It is also the shared front end for Neo4j and Morpheus.

Overview of the included modules

  • AST

    • Contains the AST classes (except expressions), and the semantic analysis.

  • Expressions

    • This contains all expressions.

  • Front End

    • This module contains a prettifier for the AST, and infrastructure data structures for compiler pipelines.

  • Parser

    • Contains a parser for the Cypher Query Language.

  • Rewriting

    • This contains a set of AST rewriters that simplify and canonicalize the tree before further processing.

  • Util

    • Contains shared code and test utilities.

Why do the modules have the version number in the name?

A common feature for database systems is to allow backwards compatability for older releases of the software. This makes it possible to move over systems query by query to an updated version of the database. The names allow for two or more versions of compiler pipelines loaded at the same time. It makes it possible for us to release updated, binary incompatible versions of the front ends.

Disclaimer

This repository is not an official Neo4j product or project. It is maintained by Neo4j employees or contributors in a personal or experimental capacity. The content here is provided “as is,” comes with no guarantees, and is unsupported.

License

The openCypher project is licensed under the Apache license 2.0.

About

Parsing, AST and semantic analysis for the Cypher Query Language

Resources

Security policy

Stars

60 stars

Watchers

18 watching

Forks

Releases

Packages

Used by

Contributors

Languages

, '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

Repository files navigation

The Cypher Front End Modules

Build Status

This repository holds a fully functional front end for the Cypher Property Graph Query Language. This includes a parser, an AST, semantic checking and analysis, and AST rewriting support. Its purpose is to assist anyone wanting to build tools, or working on implementing Cypher for database systems.

It is also the shared front end for Neo4j and Morpheus.

Overview of the included modules

  • AST

    • Contains the AST classes (except expressions), and the semantic analysis.

  • Expressions

    • This contains all expressions.

  • Front End

    • This module contains a prettifier for the AST, and infrastructure data structures for compiler pipelines.

  • Parser

    • Contains a parser for the Cypher Query Language.

  • Rewriting

    • This contains a set of AST rewriters that simplify and canonicalize the tree before further processing.

  • Util

    • Contains shared code and test utilities.

Why do the modules have the version number in the name?

A common feature for database systems is to allow backwards compatability for older releases of the software. This makes it possible to move over systems query by query to an updated version of the database. The names allow for two or more versions of compiler pipelines loaded at the same time. It makes it possible for us to release updated, binary incompatible versions of the front ends.

Disclaimer

This repository is not an official Neo4j product or project. It is maintained by Neo4j employees or contributors in a personal or experimental capacity. The content here is provided “as is,” comes with no guarantees, and is unsupported.

License

The openCypher project is licensed under the Apache license 2.0.

About

Parsing, AST and semantic analysis for the Cypher Query Language

Resources

Security policy

Stars

60 stars

Watchers

18 watching

Forks

Releases

Packages

Used by

Contributors

Languages

, '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

Repository files navigation

The Cypher Front End Modules

Build Status

This repository holds a fully functional front end for the Cypher Property Graph Query Language. This includes a parser, an AST, semantic checking and analysis, and AST rewriting support. Its purpose is to assist anyone wanting to build tools, or working on implementing Cypher for database systems.

It is also the shared front end for Neo4j and Morpheus.

Overview of the included modules

  • AST

    • Contains the AST classes (except expressions), and the semantic analysis.

  • Expressions

    • This contains all expressions.

  • Front End

    • This module contains a prettifier for the AST, and infrastructure data structures for compiler pipelines.

  • Parser

    • Contains a parser for the Cypher Query Language.

  • Rewriting

    • This contains a set of AST rewriters that simplify and canonicalize the tree before further processing.

  • Util

    • Contains shared code and test utilities.

Why do the modules have the version number in the name?

A common feature for database systems is to allow backwards compatability for older releases of the software. This makes it possible to move over systems query by query to an updated version of the database. The names allow for two or more versions of compiler pipelines loaded at the same time. It makes it possible for us to release updated, binary incompatible versions of the front ends.

Disclaimer

This repository is not an official Neo4j product or project. It is maintained by Neo4j employees or contributors in a personal or experimental capacity. The content here is provided “as is,” comes with no guarantees, and is unsupported.

License

The openCypher project is licensed under the Apache license 2.0.

About

Parsing, AST and semantic analysis for the Cypher Query Language

Resources

Security policy

Stars

60 stars

Watchers

18 watching

Forks

Releases

Packages

Used by

Contributors

Languages

, '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

Repository files navigation

The Cypher Front End Modules

Build Status

This repository holds a fully functional front end for the Cypher Property Graph Query Language. This includes a parser, an AST, semantic checking and analysis, and AST rewriting support. Its purpose is to assist anyone wanting to build tools, or working on implementing Cypher for database systems.

It is also the shared front end for Neo4j and Morpheus.

Overview of the included modules

  • AST

    • Contains the AST classes (except expressions), and the semantic analysis.

  • Expressions

    • This contains all expressions.

  • Front End

    • This module contains a prettifier for the AST, and infrastructure data structures for compiler pipelines.

  • Parser

    • Contains a parser for the Cypher Query Language.

  • Rewriting

    • This contains a set of AST rewriters that simplify and canonicalize the tree before further processing.

  • Util

    • Contains shared code and test utilities.

Why do the modules have the version number in the name?

A common feature for database systems is to allow backwards compatability for older releases of the software. This makes it possible to move over systems query by query to an updated version of the database. The names allow for two or more versions of compiler pipelines loaded at the same time. It makes it possible for us to release updated, binary incompatible versions of the front ends.

Disclaimer

This repository is not an official Neo4j product or project. It is maintained by Neo4j employees or contributors in a personal or experimental capacity. The content here is provided “as is,” comes with no guarantees, and is unsupported.

License

The openCypher project is licensed under the Apache license 2.0.

About

Parsing, AST and semantic analysis for the Cypher Query Language

Resources

Security policy

Stars

60 stars

Watchers

18 watching

Forks

Releases

Packages

Used by

Contributors

Languages

, '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

Repository files navigation

The Cypher Front End Modules

Build Status

This repository holds a fully functional front end for the Cypher Property Graph Query Language. This includes a parser, an AST, semantic checking and analysis, and AST rewriting support. Its purpose is to assist anyone wanting to build tools, or working on implementing Cypher for database systems.

It is also the shared front end for Neo4j and Morpheus.

Overview of the included modules

  • AST

    • Contains the AST classes (except expressions), and the semantic analysis.

  • Expressions

    • This contains all expressions.

  • Front End

    • This module contains a prettifier for the AST, and infrastructure data structures for compiler pipelines.

  • Parser

    • Contains a parser for the Cypher Query Language.

  • Rewriting

    • This contains a set of AST rewriters that simplify and canonicalize the tree before further processing.

  • Util

    • Contains shared code and test utilities.

Why do the modules have the version number in the name?

A common feature for database systems is to allow backwards compatability for older releases of the software. This makes it possible to move over systems query by query to an updated version of the database. The names allow for two or more versions of compiler pipelines loaded at the same time. It makes it possible for us to release updated, binary incompatible versions of the front ends.

Disclaimer

This repository is not an official Neo4j product or project. It is maintained by Neo4j employees or contributors in a personal or experimental capacity. The content here is provided “as is,” comes with no guarantees, and is unsupported.

License

The openCypher project is licensed under the Apache license 2.0.

About

Parsing, AST and semantic analysis for the Cypher Query Language

Resources

Security policy

Stars

60 stars

Watchers

18 watching

Forks

Releases

Packages

Used by

Contributors

Languages

, '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); } })(); })();
Skip to content

Repository files navigation

The Cypher Front End Modules

Build Status

This repository holds a fully functional front end for the Cypher Property Graph Query Language. This includes a parser, an AST, semantic checking and analysis, and AST rewriting support. Its purpose is to assist anyone wanting to build tools, or working on implementing Cypher for database systems.

It is also the shared front end for Neo4j and Morpheus.

Overview of the included modules

  • AST

    • Contains the AST classes (except expressions), and the semantic analysis.

  • Expressions

    • This contains all expressions.

  • Front End

    • This module contains a prettifier for the AST, and infrastructure data structures for compiler pipelines.

  • Parser

    • Contains a parser for the Cypher Query Language.

  • Rewriting

    • This contains a set of AST rewriters that simplify and canonicalize the tree before further processing.

  • Util

    • Contains shared code and test utilities.

Why do the modules have the version number in the name?

A common feature for database systems is to allow backwards compatability for older releases of the software. This makes it possible to move over systems query by query to an updated version of the database. The names allow for two or more versions of compiler pipelines loaded at the same time. It makes it possible for us to release updated, binary incompatible versions of the front ends.

Disclaimer

This repository is not an official Neo4j product or project. It is maintained by Neo4j employees or contributors in a personal or experimental capacity. The content here is provided “as is,” comes with no guarantees, and is unsupported.

License

The openCypher project is licensed under the Apache license 2.0.

About

Parsing, AST and semantic analysis for the Cypher Query Language

Resources

Security policy

Stars

60 stars

Watchers

18 watching

Forks

Releases

Packages

Used by

Contributors

Languages