%YAML 1.2
---
name: EDAsm
file_extensions: []
scope: source.asm.65816.edasm

variables:
  ws: '[ \t]+'
  ident: '[A-Za-z][A-Za-z0-9.]*'

contexts:
  prototype:
    - include: comment
    - include: registers
    - include: eol

  main:
    - meta_include_prototype: false

    - match: '{{ws}}'
      push: opcode

    - match: '^{{ident}}'
      scope: entity.name.label

    - match: ^[*;]
      push:
        - meta_scope: comment.line
        - match: \n
          pop: true


  opcode:
    - match: '{{ws}}'
      set: operand


    - include: scope:source.asm.65816#mnemonics-6502
    - include: scope:source.asm.65816#mnemonics-65c02

    - match: \b((?i)ASC|STR|DCI|CHR)\b
      scope: keyword.directive
      set: operand-string

    - match: \b((?i)CHN|INCLUDE)\b
      scope: keyword.control.import
      set: operand-path

    - match: \b(?i:MSB)\b
      scope: keyword.directive
      set: operand-on-off

    - match: \b(?i:LST)\b
      scope: keyword.directive
      set: operand-lst


    - match: \b(?i:ASC|CHN|CHR|DATE|DB|DCI|DDB|DEF|DFB|DS|DSECT|DW|ENTRY|EQU|EXTRN|FAIL|FIN|IBUFSIZ|IDNUM|INCLUDE|INTERP|LST|MACLIB|MSB|OBJ|ORG|PAGE|REF|REL|REP|SBTL|SBUFSIZ|SKP|STR|SYS|TIME|ZDEF|ZREF|X6502|PAUSE|INBUFSIZ|SBUFSIZ)\b
      scope: keyword.directive

    - match: \b(?i:DO|ELSE|FIN|IFEQ|IFGE|IFGT|IFNE|IFLE|IFLT)\b
      scope: keyword.control.conditional


  operand:
      # #'x doesn't need a closing quote.
      - match: (#)(')([^'\n])('?)
        captures:
          2: string.quoted.single punctuation.definition.string.begin
          3: string.quoted.single
          4: string.quoted.single punctuation.definition.string.end
        set: expect-comment
      - include: strings
      - include: numbers

  operand-string:
      - include: strings

  operand-on-off:
    - match: \b(?i:ON|OFF)\b
      scope: constant.language
      set: expect-comment
    - include: expect-comment

  operand-lst:
    - match: \b(?i:ON|OFF)\b
      scope: constant.language
    - match: \b(?i:NO)?(?i:CYC|GEN|WARN|UNASM|ASYM|VSYM|SIXUP|EXP)\b
      scope: constant.language
    - match: ','
    - include: expect-comment

  operand-path:
    - match: ([^; \n\t]+)
      scope: string.unquoted

  registers:
    - match: \b(?i:A|X|Y)\b
      scope: variable.language.register


  expect-comment:
    - include: comment
    - match: \S
      scope: invalid.illegal


  comment:
    - match: ;
      push:
        - meta_scope: comment.line
        - match: \n
          pop: true
    - include: eol

  numbers:
    - match: \d+
      scope: constant.numeric
    - match: \$[0-9a-fA-F]+
      scope: constant.numeric.hex
    - match: \%[01]+
      scope: constant.numeric.binary
    - match: \@[0-7]+
      scope: constant.numeric.octal

  strings:
    - match: "'"
      scope: punctuation.definition.string.begin
      push:
        - meta_include_prototype: false
        - meta_scope: string.quoted.single
        - match: "'"
          scope: punctuation.definition.string.end
          pop: true
        - match: \n
          scope: invalid.illegal.newline.asm
          pop: true
    - match: '"'
      scope: punctuation.definition.string.begin
      push:
        - meta_include_prototype: false
        - meta_scope: string.quoted.double
        - match: '"'
          scope: punctuation.definition.string.end
          pop: true
        - match: \n
          scope: invalid.illegal.newline.asm
          pop: true

  eol:
    - match: '$'
      pop: true