token_type.go

package main

type TokenType string

const (
  // Single-character tokens.
  LEFT_PAREN TokenType = "LEFT_PAREN"
  RIGHT_PAREN TokenType = "RIGHT_PAREN"
  LEFT_BRACE TokenType = "LEFT_BRACE"
  RIGHT_BRACE TokenType = "RIGHT_BRACE" 
  COMMA TokenType = "COMMA"
  DOT TokenType = "DOT"
  MINUS TokenType = "MINUS"
  PLUS TokenType = "PLUS"
  SEMICOLON TokenType = "SEMICOLON"
  SLASH TokenType = "SLASH"
  STAR TokenType = "STAR"
  // One or two character tokens.
  BANG TokenType = "BANG"
  BANG_EQUAL TokenType = "BANG_EQUAL"
  EQUAL TokenType = "EQUAL"
  EQUAL_EQUAL TokenType = "EQUAL_EQUAL"
  GREATER TokenType = "GREATER"
  GREATER_EQUAL TokenType = "GREATER_EQUAL"
  LESS TokenType = "LESS"
  LESS_EQUAL TokenType = "LESS_EQUAL"
  // Literals.
  IDENTIFIER TokenType = "IDENTIFIER"
  STRING TokenType = "STRING"
  NUMBER TokenType = "NUMBER"
  // Keywords.
  AND TokenType = "AND"
  CLASS TokenType = "CLASS"
  ELSE TokenType = "ELSE"
  FALSE TokenType = "FALSE"
  FUN TokenType = "FUN"
  FOR TokenType = "FOR"
  IF TokenType = "IF"
  NIL TokenType = "NIL"
  OR TokenType = "OR"
  PRINT TokenType = "PRINT"
  RETURN TokenType = "RETURN"
  SUPER TokenType = "SUPER"
  THIS TokenType = "THIS"
  TRUE TokenType = "TRUE"
  VAR TokenType = "VAR"
  WHILE TokenType = "WHILE"
  EOF TokenType = "EOF"
)

func (t TokenType) String() string {
  return string(t)
}