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|
# token
--
import "github.com/robertkrimen/otto/token"
Package token defines constants representing the lexical tokens of JavaScript
(ECMA5).
## Usage
```go
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
```go
type Token int
```
Token is the set of lexical tokens in JavaScript (ECMA5).
#### func IsKeyword
```go
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
```go
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://github.com/robertkrimen/godocdown
|
