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carbon-lang/utils/vscode/carbon.tmLanguage.json
T
oli-ej 0553d5f165 Update Textmate for types in a list and add unused keyword (#7535) 
Setting "type" to bright red to make comparison obvious:
(screenshots taken from VSCode)
Before
<img width="446" height="150" alt="Screenshot 2026-07-20 135558"
src="https://github.com/user-attachments/assets/81249005-99f1-47bb-af4f-ad6e8f2404fb"
/>

After
<img width="429" height="149" alt="Screenshot 2026-07-20 135738"
src="https://github.com/user-attachments/assets/acc83086-fe19-4a18-a833-968daed56229"
/>

I'm not super familiar with textmate/highlightjs, but I think what was
happening on line 5 is that the "type" scope is being extended to the
`=` after `.y`.
Adding `,` as an "end" token fixes this, and I think this is what
highlightjs already does.

I've also added "unused" as a keyword.
2026-07-20 22:37:37 +00:00

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{
"$schema": "https://raw.githubusercontent.com/martinring/tmlanguage/master/tmlanguage.json",
"uuid": "4568a54d-9a79-41ac-a36b-05916252763b",
"name": "carbon",
"scopeName": "source.carbon",
"foldingStartMarker": "\\{\\s*$",
"foldingStopMarker": "^\\s*\\}",
"fileTypes": ["carbon"],
"patterns": [
{
"include": "#comments"
},
{
"include": "#cpp-inline"
},
{
"include": "#strings"
},
{
"include": "#types"
},
{
"include": "#functions"
},
{
"include": "#variables"
},
{
"include": "#operators"
},
{
"include": "#special-keywords"
},
{
"include": "#introducer-keywords"
},
{
"include": "#modifier-keywords"
},
{
"include": "#misc-keywords"
},
{
"include": "#self-keywords"
},
{
"include": "#underscore"
},
{
"include": "#true-false"
},
{
"include": "#type-literals"
},
{
"include": "#numbers"
},
{
"include": "#parameter-bindings"
},
{
"include": "#customs"
}
],
"repository": {
"cpp-inline": {
"patterns": [
{
"comment": "C++ inline import (triple-quoted)",
"begin": "\\b(import)\\b\\s+\\b(Cpp)\\b\\s+\\b(inline)\\b\\s*(''')([^\\s'#]*\\n)?",
"beginCaptures": {
"1": { "name": "storage.type.carbon" },
"2": { "name": "support.type.property-name.carbon" },
"3": { "name": "storage.type.carbon" },
"4": { "name": "string.quoted.triple.carbon" },
"5": { "name": "constant.character.escape.carbon" }
},
"end": "(''')\\s*(;)",
"endCaptures": {
"1": { "name": "string.quoted.triple.carbon" },
"2": { "name": "punctuation.terminator.carbon" }
},
"contentName": "meta.embedded.block.cpp",
"patterns": [
{
"include": "source.cpp"
}
]
},
{
"comment": "C++ inline import (double-quoted)",
"begin": "\\b(import)\\b\\s+\\b(Cpp)\\b\\s+\\b(inline)\\b\\s*(\")",
"beginCaptures": {
"1": { "name": "storage.type.carbon" },
"2": { "name": "support.type.property-name.carbon" },
"3": { "name": "storage.type.carbon" },
"4": { "name": "string.quoted.double.carbon" }
},
"end": "(\")\\s*(;)",
"endCaptures": {
"1": { "name": "string.quoted.double.carbon" },
"2": { "name": "punctuation.terminator.carbon" }
},
"contentName": "meta.embedded.inline.cpp",
"patterns": [
{
"include": "source.cpp"
}
]
},
{
"comment": "C++ inline block (triple-quoted)",
"begin": "\\b(inline)\\b\\s+\\b(Cpp)\\b\\s*(''')([^\\s'#]*\\n)?",
"beginCaptures": {
"1": { "name": "storage.type.carbon" },
"2": { "name": "support.type.property-name.carbon" },
"3": { "name": "string.quoted.triple.carbon" },
"4": { "name": "constant.character.escape.carbon" }
},
"end": "(''')\\s*(;)",
"endCaptures": {
"1": { "name": "string.quoted.triple.carbon" },
"2": { "name": "punctuation.terminator.carbon" }
},
"contentName": "meta.embedded.block.cpp",
"patterns": [
{
"include": "source.cpp"
}
]
},
{
"comment": "C++ inline block (double-quoted)",
"begin": "\\b(inline)\\b\\s+\\b(Cpp)\\b\\s*(\")",
"beginCaptures": {
"1": { "name": "storage.type.carbon" },
"2": { "name": "support.type.property-name.carbon" },
"3": { "name": "string.quoted.double.carbon" }
},
"end": "(\")\\s*(;)",
"endCaptures": {
"1": { "name": "string.quoted.double.carbon" },
"2": { "name": "punctuation.terminator.carbon" }
},
"contentName": "meta.embedded.inline.cpp",
"patterns": [
{
"include": "source.cpp"
}
]
}
]
},
"comments": {
"patterns": [
{
"name": "comment.line.carbon",
"match": "^\\s*(?=//\\s).*$"
},
{
"name": "comment.line.carbon",
"match": "^\\s*//@dump-sem-ir-(begin|end)\\s*$"
},
{
"name": "comment.line.carbon",
"match": "^\\s*//@include-in-dumps\\s*$"
}
]
},
"string_escapes": {
"patterns": [
{
"name": "constant.character.escape.carbon",
"match": "\\\\([tnr'\"0\\0]|x[0-9A-F]{2}|u\\{[0-9A-F]{4,}\\})"
}
]
},
"strings": {
"patterns": [
{
"name": "string.quoted.triple.carbon",
"begin": "'''([^\\s'#]*\\n)?",
"end": "'''",
"beginCaptures": {
"1": {
"name": "constant.character.escape.carbon"
}
},
"patterns": [
{
"include": "#string_escapes"
}
]
},
{
"name": "string.quoted.double.carbon",
"begin": "\"",
"end": "\"",
"patterns": [
{
"include": "#string_escapes"
}
]
}
]
},
"types": {
"name": "meta.type.carbon",
"patterns": [
{
"comment": "Matches type, constraint, and implementation declarations, and explicit casts.",
"begin": "\\b((adapt|alias|class|constraint|interface|impl)|(as|impls))\\b",
"beginCaptures": {
"2": { "name": "storage.type.carbon" },
"3": { "name": "keyword.control.carbon" }
},
"end": "(?=[;{])",
"patterns": [
{ "include": "#common" },
{ "include": "#parameter-bindings" },
{
"name": "support.type.carbon",
"match": "\\w+"
}
]
},
{
"comment": "Matches types in bindings.",
"begin": ":",
"end": "(?=([;{=,]|->|in|where))",
"patterns": [
{ "include": "#common" },
{ "include": "#variables" },
{ "include": "#parameter-bindings" },
{
"name": "support.type.carbon",
"match": "\\w+"
}
]
},
{
"comment": "Matches function return types.",
"begin": "->",
"end": "(?=([;{]|=>))",
"patterns": [
{ "include": "#common" },
{
"name": "support.type.carbon",
"match": "\\w+"
}
]
},
{
"comment": "Matches types in where clause.",
"begin": "\\bwhere\\b",
"beginCaptures": {
"0": { "name": "keyword.control.carbon" }
},
"end": "(?=[;{])",
"patterns": [
{ "include": "#common" },
{ "include": "#variables" },
{ "include": "#parameter-bindings" },
{
"name": "support.type.carbon",
"match": "\\w+"
}
]
},
{
"comment": "Matches choices.",
"begin": "\\bchoice\\b",
"beginCaptures": {
"0": { "name": "storage.type.carbon" }
},
"end": "(?=[;}])",
"patterns": [
{ "include": "#common" },
{ "include": "#variables" },
{ "include": "#parameter-bindings" },
{
"name": "support.type.carbon",
"match": "\\w+"
},
{
"comment": "Matches the choice values.",
"begin": "\\{",
"end": "(?=})",
"patterns": [
{ "include": "#common" },
{
"name": "variable.other.enummember.carbon",
"match": "\\w+"
}
]
}
]
}
]
},
"functions": {
"name": "meta.function.carbon",
"patterns": [
{
"comment": "Matches function declarations.",
"begin": "\\bfn\\b",
"beginCaptures": {
"0": { "name": "storage.type.carbon" }
},
"end": "(?=[\\[\\(])",
"patterns": [
{ "include": "#common" },
{
"name": "support.function.carbon",
"match": "\\w+"
}
]
}
]
},
"variables": {
"name": "meta.variable.carbon",
"patterns": [
{
"comment": "Matches variable declarations.",
"begin": "\\b(var|let)\\b",
"beginCaptures": {
"0": { "name": "storage.type.carbon" }
},
"end": "(?=:)",
"patterns": [
{ "include": "#common" },
{
"name": "support.variable.carbon",
"match": "\\w+"
}
]
}
]
},
"operators": {
"patterns": [
{
"name": "keyword.operator.carbon",
"match": "\\b(>>=|<=>|<<=|\\&=|==|!=|>=|>>|<=|<<|-=|->|--|%=|\\|=|\\+=|\\+\\+|/=|\\*=|\\&|\\^|=|>|<|-|%|\\.|\\||\\+|/|\\*)\\b"
},
{
"name": "keyword.control.carbon",
"match": "\\b(and|as|generic|impls|in|like|not|or|partial|ref|runtime|template|unused|where)\\b"
}
]
},
"special-keywords": {
"patterns": [
{
"name": "keyword.control.carbon",
"match": "\\b(break|case|continue|else|if|for|match|return|returned|then|while)\\b"
},
{
"name": "keyword.control.carbon",
"match": "\\b(default)\\b(?=\\s*=>)"
}
]
},
"introducer-keywords": {
"patterns": [
{
"name": "storage.type.carbon",
"match": "\\b(adapt|alias|choice|class|constraint|fn|import|inline|interface|let|library|namespace|var)\\b"
},
{
"name": "storage.type.carbon",
"match": "\\b(base)\\b(?!\\s*class\\b)"
},
{
"name": "storage.type.carbon",
"match": "\\b(export)\\b(?!\\s*import\\b)"
},
{
"name": "storage.type.carbon",
"match": "\\b(impl)\\b(?!\\s*(fn|library|package)\\b)"
},
{
"name": "storage.type.carbon",
"match": "\\b(package)\\b(?!\\.)"
}
]
},
"modifier-keywords": {
"patterns": [
{
"name": "storage.modifier.carbon",
"match": "\\b(abstract|const|extend|extern|final|private|protected|static|virtual)\\b"
},
{
"name": "storage.modifier.carbon",
"match": "\\b(base)\\b(?=\\s*class\\b)"
},
{
"name": "storage.modifier.carbon",
"match": "\\b(default)\\b(?!\\s*=>)"
},
{
"name": "storage.modifier.carbon",
"match": "\\b(export)\\b(?=\\s*import\\b)"
},
{
"name": "storage.modifier.carbon",
"match": "\\b(impl)\\b(?=\\s*(fn|library|package)\\b)"
}
]
},
"misc-keywords": {
"patterns": [
{
"name": "keyword.other.carbon",
"match": "\\b(auto|destructor|forall|friend|observe|override|require)\\b"
},
{
"name": "keyword.other.carbon",
"match": "(?<=\\.)\\b(base)\\b"
}
]
},
"self-keywords": {
"patterns": [
{
"name": "variable.language.carbon",
"match": "\\b(self|Self)\\b"
}
]
},
"underscore": {
"patterns": [
{
"name": "variable.language.carbon",
"match": "\\b(_)\\b"
}
]
},
"true-false": {
"patterns": [
{
"name": "constant.language.carbon",
"match": "\\b(true|false)\\b"
}
]
},
"type-literals": {
"patterns": [
{
"name": "constant.language.carbon",
"match": "\\b(array|bool|char|str|type)\\b"
},
{
"name": "constant.language.carbon",
"comment": "Match common numeric type literals. Language server should highlight other valid literals.",
"match": "\\b[iuf](8|16|32|64|128)\\b"
}
]
},
"numbers": {
"comment": "Invalid formats are also highlighted. Language server handles error highlighting",
"patterns": [
{
"name": "constant.numeric.carbon",
"match": "0x[_0-9a-fA-F]*(\\.[_0-9a-fA-F]+(p[-+]?[0-9]+)?)?"
},
{
"name": "constant.numeric.carbon",
"match": "0b[_01]*"
},
{
"name": "constant.numeric.carbon",
"match": "[0-9][_0-9]*(\\.[_0-9]+(e[-+]?[0-9]+)?)?"
}
]
},
"parameter-bindings": {
"patterns": [
{
"comment": "Matches parameter bindings.",
"match": "\\b(\\w+)\\s*(?=:)",
"captures": {
"1": { "name": "support.variable.carbon" }
}
}
]
},
"customs": {
"comment": "For rules that should be checked last.",
"patterns": [
{
"name": "support.class.carbon",
"match": "(?<=\\bpackage\\s)\\w+"
},
{
"name": "support.class.carbon",
"match": "(?<=\\bCore\\s)\\w+"
},
{
"name": "support.type.property-name.carbon",
"match": "(?<=\\bimport\\s)\\w+"
},
{
"comment": "Matches function calls.",
"name": "support.function.carbon",
"match": "\\b\\w+\\s*\\("
},
{
"comment": "Matches unidentified words as variables.",
"name": "support.variable.carbon",
"match": "\\b\\w+\\b"
}
]
},
"common": {
"comments": [
"For including comments, operators, keywords, literals, and language constants ",
"in other rules that use begin/end. This way we do not accidentally override their ",
"highlighting in complex rules."
],
"patterns": [
{ "include": "#comments" },
{ "include": "#strings" },
{ "include": "#operators" },
{ "include": "#special-keywords" },
{ "include": "#introducer-keywords" },
{ "include": "#modifier-keywords" },
{ "include": "#misc-keywords" },
{ "include": "#self-keywords" },
{ "include": "#true-false" },
{ "include": "#type-literals" },
{ "include": "#numbers" }
]
}
}
}
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