172 lines
2.8 KiB
Markdown
172 lines
2.8 KiB
Markdown
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# token
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--
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import "github.com/dop251/goja/token"
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Package token defines constants representing the lexical tokens of JavaScript
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(ECMA5).
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## Usage
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```go
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const (
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ILLEGAL
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EOF
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COMMENT
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KEYWORD
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STRING
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BOOLEAN
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NULL
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NUMBER
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IDENTIFIER
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PLUS // +
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MINUS // -
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MULTIPLY // *
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SLASH // /
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REMAINDER // %
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AND // &
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OR // |
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EXCLUSIVE_OR // ^
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SHIFT_LEFT // <<
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SHIFT_RIGHT // >>
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UNSIGNED_SHIFT_RIGHT // >>>
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AND_NOT // &^
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ADD_ASSIGN // +=
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SUBTRACT_ASSIGN // -=
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MULTIPLY_ASSIGN // *=
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QUOTIENT_ASSIGN // /=
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REMAINDER_ASSIGN // %=
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AND_ASSIGN // &=
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OR_ASSIGN // |=
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EXCLUSIVE_OR_ASSIGN // ^=
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SHIFT_LEFT_ASSIGN // <<=
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SHIFT_RIGHT_ASSIGN // >>=
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UNSIGNED_SHIFT_RIGHT_ASSIGN // >>>=
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AND_NOT_ASSIGN // &^=
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LOGICAL_AND // &&
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LOGICAL_OR // ||
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INCREMENT // ++
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DECREMENT // --
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EQUAL // ==
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STRICT_EQUAL // ===
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LESS // <
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GREATER // >
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ASSIGN // =
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NOT // !
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BITWISE_NOT // ~
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NOT_EQUAL // !=
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STRICT_NOT_EQUAL // !==
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LESS_OR_EQUAL // <=
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GREATER_OR_EQUAL // >=
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LEFT_PARENTHESIS // (
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LEFT_BRACKET // [
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LEFT_BRACE // {
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COMMA // ,
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PERIOD // .
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RIGHT_PARENTHESIS // )
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RIGHT_BRACKET // ]
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RIGHT_BRACE // }
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SEMICOLON // ;
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COLON // :
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QUESTION_MARK // ?
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IF
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IN
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DO
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VAR
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FOR
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NEW
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TRY
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THIS
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ELSE
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CASE
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VOID
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WITH
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WHILE
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BREAK
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CATCH
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THROW
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RETURN
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TYPEOF
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DELETE
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SWITCH
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DEFAULT
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FINALLY
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FUNCTION
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CONTINUE
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DEBUGGER
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INSTANCEOF
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)
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```
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#### type Token
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```go
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type Token int
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```
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Token is the set of lexical tokens in JavaScript (ECMA5).
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#### func IsKeyword
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```go
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func IsKeyword(literal string) (Token, bool)
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```
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IsKeyword returns the keyword token if literal is a keyword, a KEYWORD token if
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the literal is a future keyword (const, let, class, super, ...), or 0 if the
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literal is not a keyword.
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If the literal is a keyword, IsKeyword returns a second value indicating if the
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literal is considered a future keyword in strict-mode only.
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7.6.1.2 Future Reserved Words:
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const
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class
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enum
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export
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extends
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import
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super
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7.6.1.2 Future Reserved Words (strict):
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implements
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interface
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let
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package
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private
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protected
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public
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static
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#### func (Token) String
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```go
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func (tkn Token) String() string
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```
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String returns the string corresponding to the token. For operators, delimiters,
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and keywords the string is the actual token string (e.g., for the token PLUS,
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the String() is "+"). For all other tokens the string corresponds to the token
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name (e.g. for the token IDENTIFIER, the string is "IDENTIFIER").
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--
|
||
|
|
**godocdown** http://github.com/robertkrimen/godocdown
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