lexique logoPlayer_lexique {

# Identifiers and keywords

@string tokenString

style keywordsStyle -> "Keywords"

$identifier$ ! tokenString error message "an identifier"

#--- This is the keyword list
list keyWordList style keywordsStyle error message "the '%K' keyword" {
    "PROGRAM",
    "ROUTIN",
    "BEGIN",
    "END",
    "FORWARD",
    "ROTATE",
    "PEN",
    "UP",
    "DOWN",
    "CALL"
}

rule 'a'->'z' |  'A'->'Z' {
  repeat
    enterCharacterIntoString (!?tokenString !*)
  while 'a'->'z' | 'A'->'Z' | '_' | '0'->'9' :
  end
  send search tokenString in keyWordList default $identifier$
}

# Literal decimal integers

style integerStyle -> "Integer Constants"
@uint uint32value
$integer$ !uint32value style integerStyle error message "a 32-bit unsigned decimal number"

message decimalNumberTooLarge : "decimal number too large"
message internalError : "internal error"

rule '0'->'9' {
  enterCharacterIntoString (!?tokenString !*)
  repeat
  while '0'->'9' :
    enterCharacterIntoString (!?tokenString !*)
  while '_' :
  end
  convertDecimalStringIntoUInt (!tokenString !?uint32value error decimalNumberTooLarge, internalError)
  send $integer$
}

# Literal character strings

style stringStyle -> "String Constants"
$"string"$ ! tokenString style stringStyle %nonAtomicSelection error message "a character string constant \"...\""


message incorrectStringEnd : "string does not end with '\"'"

rule '"' {
  repeat
   while ' ' | '!' | '#'-> '\uFFFD' :
    enterCharacterIntoString (!?tokenString !*)
  end
  select
  case '"' :
    send $"string"$
  default
    error incorrectStringEnd
  end
}

# Delimiters

style delimitersStyle -> "Delimiters"
list delimitorsList style delimitersStyle error message "the '%K' delimitor" {
  ":",    ",",    ";",   "!",  "{",  "}", "->", "@", "*", "-"
}

rule list delimitorsList

# Comments

style commentStyle -> "Comments"
$comment$ style commentStyle %nonAtomicSelection error message "a comment"
rule '#' {
  repeat
  while '\u0001' -> '\u0009' | '\u000B' | '\u000C' | '\u000E' -> '\uFFFD' :
  end
  drop $comment$
}

# Separators

rule '\u0001' -> ' ' {
}

}