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README.markdown

token

-- import "github.com/robertkrimen/otto/token"

Package token defines constants representing the lexical tokens of JavaScript (ECMA5).

Usage

const (
	ILLEGAL
	EOF
	COMMENT
	KEYWORD

	STRING
	BOOLEAN
	NULL
	NUMBER
	IDENTIFIER

	PLUS      // +
	MINUS     // -
	MULTIPLY  // *
	SLASH     // /
	REMAINDER // %

	AND                  // &
	OR                   // |
	EXCLUSIVE_OR         // ^
	SHIFT_LEFT           // <<
	SHIFT_RIGHT          // >>
	UNSIGNED_SHIFT_RIGHT // >>>
	AND_NOT              // &^

	ADD_ASSIGN       // +=
	SUBTRACT_ASSIGN  // -=
	MULTIPLY_ASSIGN  // *=
	QUOTIENT_ASSIGN  // /=
	REMAINDER_ASSIGN // %=

	AND_ASSIGN                  // &=
	OR_ASSIGN                   // |=
	EXCLUSIVE_OR_ASSIGN         // ^=
	SHIFT_LEFT_ASSIGN           // <<=
	SHIFT_RIGHT_ASSIGN          // >>=
	UNSIGNED_SHIFT_RIGHT_ASSIGN // >>>=
	AND_NOT_ASSIGN              // &^=

	LOGICAL_AND // &&
	LOGICAL_OR  // ||
	INCREMENT   // ++
	DECREMENT   // --

	EQUAL        // ==
	STRICT_EQUAL // ===
	LESS         // <
	GREATER      // >
	ASSIGN       // =
	NOT          // !

	BITWISE_NOT // ~

	NOT_EQUAL        // !=
	STRICT_NOT_EQUAL // !==
	LESS_OR_EQUAL    // <=
	GREATER_OR_EQUAL // >=

	LEFT_PARENTHESIS // (
	LEFT_BRACKET     // [
	LEFT_BRACE       // {
	COMMA            // ,
	PERIOD           // .

	RIGHT_PARENTHESIS // )
	RIGHT_BRACKET     // ]
	RIGHT_BRACE       // }
	SEMICOLON         // ;
	COLON             // :
	QUESTION_MARK     // ?

	IF
	IN
	DO

	VAR
	FOR
	NEW
	TRY

	THIS
	ELSE
	CASE
	VOID
	WITH

	WHILE
	BREAK
	CATCH
	THROW

	RETURN
	TYPEOF
	DELETE
	SWITCH

	DEFAULT
	FINALLY

	FUNCTION
	CONTINUE
	DEBUGGER

	INSTANCEOF
)

type Token

type Token int

Token is the set of lexical tokens in JavaScript (ECMA5).

func IsKeyword

func IsKeyword(literal string) (Token, bool)

IsKeyword returns the keyword token if literal is a keyword, a KEYWORD token if the literal is a future keyword (const, let, class, super, ...), or 0 if the literal is not a keyword.

If the literal is a keyword, IsKeyword returns a second value indicating if the literal is considered a future keyword in strict-mode only.

7.6.1.2 Future Reserved Words:

const
class
enum
export
extends
import
super

7.6.1.2 Future Reserved Words (strict):

implements
interface
let
package
private
protected
public
static

func (Token) String

func (tkn Token) String() string

String returns the string corresponding to the token. For operators, delimiters, and keywords the string is the actual token string (e.g., for the token PLUS, the String() is "+"). For all other tokens the string corresponds to the token name (e.g. for the token IDENTIFIER, the string is "IDENTIFIER").

-- godocdown http:https://github.com/robertkrimen/godocdown