# Google Go (golang) syntax
# (c) 2012 Matthias S. Benkmann
# License: http://creativecommons.org/licenses/by/3.0/deed.en_US

# Small modifications by jjjordan to better suit white backgrounds and 16-color
# consoles.  (Original colors commented out below)

# Standard colors:
#
# Foreground:
#   white cyan magenta blue yellow green red black
#
# Background:
#   bg_white bg_cyan bg_magenta bg_blue bg_yellow bg_green bg_red bg_black
#
#
# For 16 color and 256 color xterms: "export TERM=xterm-16color", the following
# brighter than normal colors are available ( Note that you need an xterm which
# was compiled to support 16 or 256 colors and a matching termcap/terminfo entry
# for it.)
#
# Foreground:
#   WHITE CYAN MAGENTA BLUE YELLOW GREEN RED BLACK
#
# Background:
#   bg_WHITE bg_CYAN bg_MAGENTA bg_BLUE bg_YELLOW bg_GREEN bg_RED bg_BLACK
#
#
# For 256 color xterm: "export TERM=xterm-256color", the following become available
# ( Note that you need an xterm which was compiled to support 256 colors and a
# matching termcap/terminfo entry for it. )
#
# fg_RGB and bg_RGB, where R, G, and B range from 0 - 5.  So: fg_500 is bright red.
#
# fg_NN and bg_NN give shades of grey, where the intensity, NN, ranges from 0 - 23.


=Idle
=Error          red bold
=ErrorDigit     yellow bold bg_red
=Comment        green
=SingleQuoted   cyan
=DoubleQuoted   cyan
=BackQuoted     cyan
=Escape         bold cyan
=Operator       bold cyan
=Parentheses    #bold yellow
=Brackets       yellow
=Brace          magenta
=Semicolon      #bold yellow
=Period         bold
=PeriodDecimal  red
=Number         red
=Constant       red
=Comma          #bold yellow
=Identifier     #fg_333
=ExportedIdentifier #fg_444
=Keyword        bold
=Type           bold
=BuiltinFunction bold

##################### main #########################
:main Idle
  *             keyword_or_identifier   noeat buffer
  " \t"         main
  "\n"          main
  "/"           maybe_comment recolor=-1
  "'"           single_quoted recolor=-1
  "\""          double_quoted recolor=-1
  "`"           back_quoted   recolor=-1
  "+&=!|*^<>:%-" operator    noeat
  "()"          parentheses   noeat
  "[]"          brackets      noeat
  "{}"          curlies       noeat
  ";"           semicolon     noeat
  ","           comma         noeat
  "."           period
  "0"           number0       recolor=-1
  "1-9"         float         noeat
  "#$@~"        error         noeat

#################### error ##########################
:error Error
  *             error
  "\n"          main
  "/"           maybe_comment_err  recolor=-1

:maybe_comment_err Operator
  *             error noeat recolor=-2
  "/"           line_comment  recolor=-2
  "*"           block_comment recolor=-2

################## comments #########################
:maybe_comment Operator
  *             main noeat
  "/"           line_comment  recolor=-2
  "*"           block_comment recolor=-2

:line_comment Comment
  *             line_comment
  "\n"          main

:block_comment Comment
  *            block_comment
  "*"          maybe_end_block_comment

:maybe_end_block_comment Comment
  *            block_comment noeat
  "/"          main

################ strings ############################
:single_quoted SingleQuoted
  *            single_quoted
  "'"          main
  "\\"         single_quoted call=.escape() recolor=-1
  "\n"         error

:double_quoted DoubleQuoted
  *            double_quoted
  "\""         main
  "\\"         double_quoted call=.escape() recolor=-1
  "\n"         error

:back_quoted BackQuoted
  *            back_quoted
  "`"          main

################### operators #######################
:operator Operator
  *            main

:parentheses Parentheses
  *            main

:brackets Brackets
  *            main

:curlies  Brace
  *            main

:semicolon Semicolon
  *            main

:comma Comma
  *            main

##################### period #######################

:period Period
  *            period_other    noeat recolor=-2
  "0-9"        period_decimal  noeat recolor=-2

:period_other Period
  *            main noeat

:period_decimal PeriodDecimal
  *            float_no_period noeat

###### START .subr for underscores in decimal, hexadecimal, octal, and binary constants ######
.subr uscore_num
:uscore_num Number
  *            error_digit     noeat recolor=-2
.ifdef dec
  "0-9"        uscore_num_end  return noeat
.endif
.ifdef hex
  "0-9a-fA-F"  uscore_num_end  return noeat
.endif
.ifdef oct
  "0-7"        uscore_num_end  return noeat
.endif
.ifdef bin
  "01"         uscore_num_end  return noeat
.endif

:error_digit ErrorDigit
  *            uscore_num_end  noeat
  "0-9a-fA-F_" error_digit

:uscore_num_end Number
  *            main            return noeat

.end
###### END .subr for underscores in decimal, hexadecimal, octal, and binary constants ######

################### numbers ####################

:float_no_period Number
  *            end_of_number   noeat
  "0-9"        float_no_period
  "_"          float_no_period call=.uscore_num(dec)
  "eE"         integer

:integer Number
  *            error     noeat
  "+-"         unsigned
  "0-9"        unsigned_or_end

:unsigned Number
  *            error     noeat
  "0-9"        unsigned_or_end
  "_"          float_no_period call=.uscore_num(dec)

:unsigned_or_end Number
  *            end_of_number noeat
  "0-9"        unsigned_or_end
  "_"          unsigned_or_end call=.uscore_num(dec)

:end_of_number Number
  *            main  noeat
  "i"          main   # imaginary number suffix

:number0 Number
  *            end_of_number  noeat
  "xX"         hex
  "oO"         oct
  "bB"         bin
  "."          period_decimal recolor=-1
    # 099i is a valid imaginary number, 099.0 is a valid float,
    # but 099 is an invalid octal.
    #We don't check for this and simply lump both cases together.
  "0-9"        imaginary_or_octal
   "_"         imaginary_or_octal call=.uscore_num(dec)

:imaginary_or_octal Number
  *            float          noeat
  "i"          end_of_number  noeat
  "0-7"        imaginary_or_octal
  "8-9"        imaginary_or_float mark
  "_"          imaginary_or_octal call=.uscore_num(dec)

:imaginary_or_float Number
  *            broken_octal   noeat
  "."          period_decimal recolor=-1
  "i"          end_of_number  noeat
  "0-9"        imaginary_or_float
  "_"          imaginary_or_octal call=.uscore_num(dec)

:broken_octal ErrorDigit
  *            broken_octal_2 noeat recolormark

:broken_octal_2 ErrorDigit
  *            end_of_number  noeat call=.uscore_num()

:hex Number
  *            end_of_number  noeat
  "pP"         integer
  "0-9a-fA-F"  hex
  "_"          hex            call=.uscore_num(hex)
  "."          maybe_radix    mark

:maybe_radix Number
  *            end_of_number  noeat
  "0-9a-fA-F"  hex
  "_"          hex            call=.uscore_num(hex)
  "pP"         integer        call=.uscore_num(dec)

:oct Number
  *            end_of_number  noeat
  "0-7"        oct
  "8-9a-fA-F"  end_of_number  call=.uscore_num()
  "_"          oct            call=.uscore_num(oct)

:bin Number
  *            end_of_number  noeat
  "01"         bin
  "2-9a-fA-F"  end_of_number  call=.uscore_num()
  "_"          bin            call=.uscore_num(bin)

:float Number
  *            end_of_number  noeat
  "0-9"        float
  "_"          float          call=.uscore_num(dec)
  "."          period_decimal recolor=-1
  "eEpP"       integer
  "a-dfA-DF"   end_of_number  call=.uscore_num()

################# keywords and identifiers ##########################
:keyword_or_identifier Identifier
  *            identifier
  "A-Z"        exported_identifier recolor=-1
  "a-z_"       keyword_or_identifier2

:exported_identifier  ExportedIdentifier
  *                         exported_identifier
  "\x01-/:-@[-^`{-\x7f"      main noeat

:identifier Identifier
  *                         identifier
  "\x01-/:-@[-^`{-\x7f"     main noeat

:keyword_or_identifier2 Identifier
  *                 identifier
  "a-zA-Z_0-9"      keyword_or_identifier2
  "\x01-/:-@[-^`{-\x7f"      main noeat hold strings
      "_"           keyword
      "break"       keyword
      "default"     keyword
      "func"        keyword
      "interface"   keyword
      "select"      keyword
      "case"        keyword
      "defer"       keyword
      "go"          keyword
      "map"         keyword
      "struct"      keyword
      "chan"        keyword
      "else"        keyword
      "goto"        keyword
      "package"     keyword
      "switch"      keyword
      "const"       keyword
      "fallthrough" keyword
      "if"          keyword
      "range"       keyword
      "type"        keyword
      "continue"    keyword
      "for"         keyword
      "import"      keyword
      "return"      keyword
      "var"         keyword

      "true"        constant
      "false"       constant
      "nil"         constant
      "iota"        constant

      "byte"        type
      "rune"        type
      "int"         type
      "uint"        type
      "uintptr"     type
      "uint8"       type
      "uint16"      type
      "uint32"      type
      "uint64"      type
      "int8"        type
      "int16"       type
      "int32"       type
      "int64"       type
      "float32"     type
      "float64"     type
      "complex64"   type
      "complex128"  type
      "bool"        type
      "string"      type
      "error"       type

      "delete"      builtin
      "make"        builtin
      "len"         builtin
      "cap"         builtin
      "new"         builtin
      "copy"        builtin
      "append"      builtin
      "close"       builtin
      "complex"     builtin
      "imag"        builtin
      "panic"       builtin
      "print"       builtin
      "println"     builtin
      "real"        builtin
      "recover"     builtin
  done

:keyword Keyword
  *            main  noeat

:constant Constant
  *            main  noeat

:type Type
  *            main  noeat

:builtin BuiltinFunction
  *            main  noeat




########################## .subr escape START ######################################
.subr escape
:esc Escape
  *              esc_err    noeat
  "abfnrtv'\"" whatever return
    # For some reason joe doesn't interpret \\ properly if merged with the
    # previous case. So create a separate case for it.
  "\\"         whatever return
  "x"            hex2
  "u"            hex4
  "U"            hex8
  "0-3"          oct2

:hex8 Escape
  *              esc_err noeat
  "a-fA-F0-9"    hex7

:hex7 Escape
  *              esc_err    noeat
  "a-fA-F0-9"    hex6

:hex6 Escape
  *              esc_err noeat
  "a-fA-F0-9"    hex5

:hex5 Escape
  *              esc_err    noeat
  "a-fA-F0-9"    hex4

:hex4 Escape
  *              esc_err noeat
  "a-fA-F0-9"    hex3

:hex3 Escape
  *              esc_err    noeat
  "a-fA-F0-9"    hex2

:hex2 Escape
  *              esc_err noeat
  "a-fA-F0-9"    hex1

:hex1 Escape
  *              esc_err    noeat
  "a-fA-F0-9"    whatever return

:oct2 Escape
  *              esc_err noeat
  "0-7"          oct1

:oct1 Escape
  *              esc_err noeat
  "0-7"          whatever return

:esc_err Error
  *              esc_err return
  "\n"           esc_err_newline noeat recolor=-2

:esc_err_newline Error
  *              esc_err return noeat


.end
########################## .subr escape END ######################################


