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Merged
alecthomas merged 4 commits into from
Dec 20, 2025
Merged

Add lexer for microcad #1171

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a3fa9fa
Add lexer for microcad
WilstonOreo Dec 7, 2025
ebdcd5b
Fix operators
WilstonOreo Dec 18, 2025
d0babb7
Some lexer improvement
WilstonOreo Dec 19, 2025
2317356
Test data
WilstonOreo Dec 19, 2025
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139 changes: 139 additions & 0 deletions lexers/embedded/microcad.xml
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<lexer>
<config>
<name>microcad</name>
<alias>µcad</alias>
<filename>*.µcad</filename>
<filename>*.ucad</filename>
<filename>*.mcad</filename>
<mime_type>text/microcad</mime_type>
<ensure_nl>true</ensure_nl>
</config>

<rules>
<!-- Root state -->
<state name="root">
<rule pattern="\n">
<token type="TextWhitespace"/>
</rule>
<rule pattern="\s+">
<token type="TextWhitespace"/>
</rule>

<!-- COMMENTS -->
<rule pattern="///.*">
<token type="LiteralStringDoc"/>
</rule>

<rule pattern="//.*">
<token type="CommentSingle"/>
</rule>

<rule pattern="/\*.*">
<token type="CommentMultiline"/>
<push state="comment"/>
</rule>

<!-- KEYWORDS -->
<rule pattern="\b(pub|sketch|part|op|mod|use|fn|const|prop|init|return|if|else|mat|__builtin|or|and|not|as)\b">
<token type="Keyword"/>
</rule>

<!-- TYPES -->
<rule pattern="\b(Integer|Scalar|String|Color|Length|Area|Volume|Angle|Weight|Density|Bool|Matrix[0-9])\b">
<token type="KeywordType"/>
</rule>

<!-- FUNCTION NAMES -->
<rule pattern="\b([a-z_][a-zA-Z0-9_]*)\s*(?=\()">
<token type="NameFunction"/>
</rule>

<!-- OPERATORS -->
<rule pattern="[+\-*/%&amp;|&lt;&gt;^!@=]">
<token type="Operator"/>
</rule>

<!-- NUMBERS + UNITS -->
<rule pattern="\b(([0-9]+(\.[0-9]+)?)(%|m²|cm²|mm²|µm²|in²|ft²|yd²|m³|cm³|mm³|µm³|in³|ft³|yd³|ml|cl|l|µl|cm|mm|m|µm|in|ft|yd|deg|°|grad|turn|rad|g|kg|lb|oz)?)|true|false\b">
<token type="LiteralNumber"/>
</rule>

<!-- NAMESPACES -->
<rule pattern="([a-z_][a-z0-9_]*)(::)">
<bygroups>
<token type="NameNamespace"/>
<token type="Operator"/>
</bygroups>
</rule>

<!-- CONSTANTS (ALL CAPS) -->
<rule pattern="\b([A-Z_][A-Z0-9_]*)\b">
<token type="NameConstant"/>
</rule>

<!-- CUSTOM TYPES (Capitalized identifiers) -->
<rule pattern="\b([A-Z_][a-zA-Z0-9_]*)\b">
<token type="NameClass"/>
</rule>

<!-- VARIABLES -->
<rule pattern="\b([a-z_][a-zA-Z0-9_]*)\b">
<token type="Name"/>
</rule>

<!-- STRINGS -->
<rule pattern="&quot;[^&quot;]*&quot;">
<token type="LiteralString"/>
</rule>

<!-- PAREN GROUP -->
<rule pattern="[{}()\[\],.;:]">
<token type="Punctuation"/>
</rule>


<!-- BRACE GROUP -->
<rule pattern="\{">
<token type="Punctuation"/>
<push state="brace"/>
</rule>

<rule pattern="[\}\)]">
<token type="Punctuation"/>
</rule>

</state>

<!-- Parenthesized expression -->
<state name="paren">
<rule pattern="\)">
<token type="Punctuation"/>
<pop/>
</rule>
<rule>
<include state="root"/>
</rule>
</state>

<!-- Braced expression -->
<state name="brace">
<rule pattern="\}">
<token type="Punctuation"/>
<pop/>
</rule>
<rule>
<include state="root"/>
</rule>
</state>

<state name="comment">
<!-- End of comment -->
<rule pattern="\*/">
<token type="CommentMultiline"/>
<pop/>
</rule>
</state>


</rules>
</lexer>
16 changes: 16 additions & 0 deletions lexers/testdata/microcad.actual
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// Copyright © 2025 The µcad authors <[email protected]>
// SPDX-License-Identifier: AGPL-3.0-or-later

use std::math::*;
use std::ops::*;
use std::geo3d::*;

/// A CSG cube.
part CsgCube(size: Length) {
s = size / sqrt(2.1); /* Inline comment */
body = Sphere(r = s) & Cube(size);
holes = Cylinder(h = size, d = s).orient([X,Y,Z]);
body - holes;
}

CsgCube(50mm);
121 changes: 121 additions & 0 deletions lexers/testdata/microcad.expected
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[
{"type":"CommentSingle","value":"// Copyright © 2025 The µcad authors \[email protected]\u003e"},
{"type":"TextWhitespace","value":"\n"},
{"type":"CommentSingle","value":"// SPDX-License-Identifier: AGPL-3.0-or-later"},
{"type":"TextWhitespace","value":"\n\n"},
{"type":"Keyword","value":"use"},
{"type":"TextWhitespace","value":" "},
{"type":"NameNamespace","value":"std"},
{"type":"Operator","value":"::"},
{"type":"NameNamespace","value":"math"},
{"type":"Operator","value":"::*"},
{"type":"Punctuation","value":";"},
{"type":"TextWhitespace","value":"\n"},
{"type":"Keyword","value":"use"},
{"type":"TextWhitespace","value":" "},
{"type":"NameNamespace","value":"std"},
{"type":"Operator","value":"::"},
{"type":"NameNamespace","value":"ops"},
{"type":"Operator","value":"::*"},
{"type":"Punctuation","value":";"},
{"type":"TextWhitespace","value":"\n"},
{"type":"Keyword","value":"use"},
{"type":"TextWhitespace","value":" "},
{"type":"NameNamespace","value":"std"},
{"type":"Operator","value":"::"},
{"type":"NameNamespace","value":"geo3d"},
{"type":"Operator","value":"::*"},
{"type":"Punctuation","value":";"},
{"type":"TextWhitespace","value":"\n\n"},
{"type":"LiteralStringDoc","value":"/// A CSG cube."},
{"type":"TextWhitespace","value":"\n"},
{"type":"Keyword","value":"part"},
{"type":"TextWhitespace","value":" "},
{"type":"NameClass","value":"CsgCube"},
{"type":"Punctuation","value":"("},
{"type":"Name","value":"size"},
{"type":"Punctuation","value":":"},
{"type":"TextWhitespace","value":" "},
{"type":"KeywordType","value":"Length"},
{"type":"Punctuation","value":")"},
{"type":"TextWhitespace","value":" "},
{"type":"Punctuation","value":"{"},
{"type":"TextWhitespace","value":"\n "},
{"type":"Name","value":"s"},
{"type":"TextWhitespace","value":" "},
{"type":"Operator","value":"="},
{"type":"TextWhitespace","value":" "},
{"type":"Name","value":"size"},
{"type":"TextWhitespace","value":" "},
{"type":"Operator","value":"/"},
{"type":"TextWhitespace","value":" "},
{"type":"NameFunction","value":"sqrt"},
{"type":"Punctuation","value":"("},
{"type":"LiteralNumber","value":"2.1"},
{"type":"Punctuation","value":");"},
{"type":"TextWhitespace","value":" "},
{"type":"CommentMultiline","value":"/* Inline comment */"},
{"type":"TextWhitespace","value":"\n "},
{"type":"Name","value":"body"},
{"type":"TextWhitespace","value":" "},
{"type":"Operator","value":"="},
{"type":"TextWhitespace","value":" "},
{"type":"NameClass","value":"Sphere"},
{"type":"Punctuation","value":"("},
{"type":"Name","value":"r"},
{"type":"TextWhitespace","value":" "},
{"type":"Operator","value":"="},
{"type":"TextWhitespace","value":" "},
{"type":"Name","value":"s"},
{"type":"Punctuation","value":")"},
{"type":"TextWhitespace","value":" "},
{"type":"Operator","value":"\u0026"},
{"type":"TextWhitespace","value":" "},
{"type":"NameClass","value":"Cube"},
{"type":"Punctuation","value":"("},
{"type":"Name","value":"size"},
{"type":"Punctuation","value":");"},
{"type":"TextWhitespace","value":"\n "},
{"type":"Name","value":"holes"},
{"type":"TextWhitespace","value":" "},
{"type":"Operator","value":"="},
{"type":"TextWhitespace","value":" "},
{"type":"NameClass","value":"Cylinder"},
{"type":"Punctuation","value":"("},
{"type":"Name","value":"h"},
{"type":"TextWhitespace","value":" "},
{"type":"Operator","value":"="},
{"type":"TextWhitespace","value":" "},
{"type":"Name","value":"size"},
{"type":"Punctuation","value":","},
{"type":"TextWhitespace","value":" "},
{"type":"Name","value":"d"},
{"type":"TextWhitespace","value":" "},
{"type":"Operator","value":"="},
{"type":"TextWhitespace","value":" "},
{"type":"Name","value":"s"},
{"type":"Punctuation","value":")."},
{"type":"NameFunction","value":"orient"},
{"type":"Punctuation","value":"(["},
{"type":"NameConstant","value":"X"},
{"type":"Punctuation","value":","},
{"type":"NameConstant","value":"Y"},
{"type":"Punctuation","value":","},
{"type":"NameConstant","value":"Z"},
{"type":"Punctuation","value":"]);"},
{"type":"TextWhitespace","value":"\n "},
{"type":"Name","value":"body"},
{"type":"TextWhitespace","value":" "},
{"type":"Operator","value":"-"},
{"type":"TextWhitespace","value":" "},
{"type":"Name","value":"holes"},
{"type":"Punctuation","value":";"},
{"type":"TextWhitespace","value":"\n"},
{"type":"Punctuation","value":"}"},
{"type":"TextWhitespace","value":"\n\n"},
{"type":"NameClass","value":"CsgCube"},
{"type":"Punctuation","value":"("},
{"type":"LiteralNumber","value":"50mm"},
{"type":"Punctuation","value":");"},
{"type":"TextWhitespace","value":"\n"}
]