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%YAML 1.2
---
# http://www.sublimetext.com/docs/syntax.html
name: WGSL
file_extensions:
  - wgsl
scope: source.wgsl
contexts:
  main:
    - include: line_comments
    - include: block_comments
    - include: keywords
    - include: attributes
    - include: functions
    - include: function_calls
    - include: constants
    - include: types
    - include: variables
    - include: punctuation
  attributes:
    - match: '(@)([A-Za-z_]+)'
      comment: attribute declaration
      scope: meta.attribute.wgsl
      captures:
        1: keyword.operator.attribute.at
        2: entity.name.attribute.wgsl
  block_comments:
    - match: /\*\*/
      comment: empty block comments
      scope: comment.block.wgsl
    - match: /\*\*
      comment: block documentation comments
      push:
        - meta_scope: comment.block.documentation.wgsl
        - match: \*/
          pop: true
        - include: block_comments
    - match: /\*(?!\*)
      comment: block comments
      push:
        - meta_scope: comment.block.wgsl
        - match: \*/
          pop: true
        - include: block_comments
  constants:
    - match: '(-?\b[0-9][0-9]*\.[0-9][0-9]*)([eE][+-]?[0-9]+)?\b'
      comment: decimal float literal
      scope: constant.numeric.float.wgsl
    - match: '-?\b0x[0-9a-fA-F]+\b|\b0\b|-?\b[1-9][0-9]*\b'
      comment: int literal
      scope: constant.numeric.decimal.wgsl
    - match: '\b0x[0-9a-fA-F]+u\b|\b0u\b|\b[1-9][0-9]*u\b'
      comment: uint literal
      scope: constant.numeric.decimal.wgsl
    - match: \b(true|false)\b
      comment: boolean constant
      scope: constant.language.boolean.wgsl
  function_calls:
    - match: '([A-Za-z0-9_]+)(\()'
      comment: function/method calls
      captures:
        1: entity.name.function.wgsl
        2: punctuation.brackets.round.wgsl
      push:
        - meta_scope: meta.function.call.wgsl
        - match: \)
          captures:
            0: punctuation.brackets.round.wgsl
          pop: true
        - include: line_comments
        - include: block_comments
        - include: keywords
        - include: attributes
        - include: function_calls
        - include: constants
        - include: types
        - include: variables
        - include: punctuation
  functions:
    - match: '\b(fn)\s+([A-Za-z0-9_]+)((\()|(<))'
      comment: function definition
      captures:
        1: keyword.other.fn.wgsl
        2: entity.name.function.wgsl
        4: punctuation.brackets.round.wgsl
      push:
        - meta_scope: meta.function.definition.wgsl
        - match: '\{'
          captures:
            0: punctuation.brackets.curly.wgsl
          pop: true
        - include: line_comments
        - include: block_comments
        - include: keywords
        - include: attributes
        - include: function_calls
        - include: constants
        - include: types
        - include: variables
        - include: punctuation
  keywords:
    - match: \b(bitcast|block|break|case|continue|continuing|default|discard|else|elseif|enable|fallthrough|for|function|if|loop|private|read|read_write|return|storage|switch|uniform|while|workgroup|write)\b
      comment: other keywords
      scope: keyword.control.wgsl
    - match: \b(asm|const|do|enum|handle|mat|premerge|regardless|typedef|unless|using|vec|void)\b
      comment: reserved keywords
      scope: keyword.control.wgsl
    - match: \b(let|var)\b
      comment: storage keywords
      scope: keyword.other.wgsl storage.type.wgsl
    - match: \b(type)\b
      comment: type keyword
      scope: keyword.declaration.type.wgsl storage.type.wgsl
    - match: \b(enum)\b
      comment: enum keyword
      scope: keyword.declaration.enum.wgsl storage.type.wgsl
    - match: \b(struct)\b
      comment: struct keyword
      scope: keyword.declaration.struct.wgsl storage.type.wgsl
    - match: \bfn\b
      comment: fn
      scope: keyword.other.fn.wgsl
    - match: (\^|\||\|\||&&|<<|>>|!)(?!=)
      comment: logical operators
      scope: keyword.operator.logical.wgsl
    - match: '&(?![&=])'
      comment: logical AND, borrow references
      scope: keyword.operator.borrow.and.wgsl
    - match: (\+=|-=|\*=|/=|%=|\^=|&=|\|=|<<=|>>=)
      comment: assignment operators
      scope: keyword.operator.assignment.wgsl
    - match: '(?<![<>])=(?!=|>)'
      comment: single equal
      scope: keyword.operator.assignment.equal.wgsl
    - match: (=(=)?(?!>)|!=|<=|(?<!=)>=)
      comment: comparison operators
      scope: keyword.operator.comparison.wgsl
    - match: '(([+%]|(\*(?!\w)))(?!=))|(-(?!>))|(/(?!/))'
      comment: math operators
      scope: keyword.operator.math.wgsl
    - match: \.(?!\.)
      comment: dot access
      scope: keyword.operator.access.dot.wgsl
    - match: '->'
      comment: dashrocket, skinny arrow
      scope: keyword.operator.arrow.skinny.wgsl
  line_comments:
    - match: \s*//.*
      comment: single line comment
      scope: comment.line.double-slash.wgsl
  punctuation:
    - match: ','
      comment: comma
      scope: punctuation.comma.wgsl
    - match: '[{}]'
      comment: curly braces
      scope: punctuation.brackets.curly.wgsl
    - match: '[()]'
      comment: parentheses, round brackets
      scope: punctuation.brackets.round.wgsl
    - match: ;
      comment: semicolon
      scope: punctuation.semi.wgsl
    - match: '[\[\]]'
      comment: square brackets
      scope: punctuation.brackets.square.wgsl
    - match: '(?<![=-])[<>]'
      comment: angle brackets
      scope: punctuation.brackets.angle.wgsl
  types:
    - match: \b(bool|i32|u32|f32)\b
      comment: scalar Types
      scope: storage.type.wgsl
    - match: \b(i64|u64|f64)\b
      comment: reserved scalar Types
      scope: storage.type.wgsl
    - match: \b(vec2i|vec3i|vec4i|vec2u|vec3u|vec4u|vec2f|vec3f|vec4f|vec2h|vec3h|vec4h)\b
      comment: vector type aliasses
      scope: storage.type.wgsl
    - match: \b(mat2x2f|mat2x3f|mat2x4f|mat3x2f|mat3x3f|mat3x4f|mat4x2f|mat4x3f|mat4x4f|mat2x2h|mat2x3h|mat2x4h|mat3x2h|mat3x3h|mat3x4h|mat4x2h|mat4x3h|mat4x4h)\b
      comment: matrix type aliasses
      scope: storage.type.wgsl
    - match: '\b(vec[2-4]|mat[2-4]x[2-4])\b'
      comment: vector/matrix types
      scope: storage.type.wgsl
    - match: \b(atomic)\b
      comment: atomic types
      scope: storage.type.wgsl
    - match: \b(array)\b
      comment: array types
      scope: storage.type.wgsl
    - match: '\b([A-Z][A-Za-z0-9]*)\b'
      comment: Custom type
      scope: entity.name.type.wgsl
  variables:
    - match: '\b(?<!(?<!\.)\.)(?:r#(?!(crate|[Ss]elf|super)))?[a-z0-9_]+\b'
      comment: variables
      scope: variable.other.wgsl