# Syntax Highlighting for 6502 programming with DASM
# Improvements: absolut addresses/numbers, equ, seg, ds, word
# Not working: labels

scopeName: 'source.assembly.6502.dasm-6502'   # Prevents conflicts with other architectures supported by dasm
name: '6502 Assembly (DASM)'    # Name shown in Atom Editor grammar selection'fileTypes': []
foldingStartMarker: '/\\*\\*|\\{\\s*$'
foldingStopMarker: '\\*\\*/|^\\s*\\}'
# File extensions associated with this grammar
fileTypes: []
# include all opcodes and directives the toolchain supports
patterns: [
  { include:  'source.6502-opcodes' }   # include basic 6502 instruction set
  { include:  '#comments' }
  { include:  '#directives' }
  { include:  '#symbols' }
]


# Repository starts here ------------------------------------------------------
repository:

  # comments
  comments:
    patterns: [
      # semicolon comments
      {
        # captures:
        #   1:
        #     name: 'punctuation.definition.comment'
          match: '(;).*$\\n?'
          name: 'comment.line.semicolon.dasm-6502'
      }
    ]

  # symbols
  symbols:
    patterns: [
      # strings
      {
        begin: '"'
        end: '"'
        name: 'string.quoted.double.untitled.dasm-6502'
        patterns: [
          {
            match: '\\\\.'
            name: 'constant.character.escape.untitled.dasm-6502'
          }
        ]
      }
      # labels
      {
        match: '^[A-Za-z_][A-Za-z0-9_]*'
        name: 'entity.name.label.dasm-6502'
      }
      # local labels
      {
        match: '^\\.[A-Za-z_][A-Za-z0-9_]*'
        name: 'entity.name.label.local.dasm-6502'
      }
      # absolut address/number
      {
        match: '\\#(\'.\'|[^\\s\']+)'
        name: 'constant.numeric.hex.cc65-directives'
      }
      # binary numbers
      {
        match:  '%[01]+'
        name:   'constant.numeric.binary.dasm-6502'
      }
      # decimal numbers
      {
        match:  '\\b([0-9]+)\\b'
        name:   'constant.numeric.decimal.dasm-6502'
      }
      # hex numbers
      {
        match: '\\$[0-9a-fA-F]+'
        name: 'constant.numeric.hex.dasm-6502'
      }
      # macro parameters
      {
        match: '{[0-9]+}'
        name: 'variable.parameter.macro.dasm-6502'
      }
    ]
  #
  # assembler directives
  directives:
    patterns: [
      # data directives
      {
        match: '\\b(?i:SET|WORD|.?BYTE|HEX|DS|.?WORD)\\b'
        name: 'storage.type.dasm-6502'
      }
      # linker directives
      {
        match: '\\b(?i:ALIGN)\\b'
        name: 'storage.modifier.dasm-6502'
      }
      # subroutines and macros
      {
        match: '\\b(?i:REPEAT|REPEND|MAC|ENDM|SUBROUTINE|INCLUDE)\\b'
        name: 'support.function.dasm-6502'
      }
      # processor and org
      {
        match: '\\b(?i:processor|org)\\b'
        name: 'constant.language.dasm-6502'
      }
      # pseudo opcodes
      {
        match:  '\\b(?i:equ|seg(\\.u)?)\\b'
        name:   'support.function.pseudo.dasm-6502'
      }
    ]