Documentation
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Overview ¶
Package token defines constants representing the lexical tokens of JavaScript (ECMA5).
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type Token ¶
type Token int
Token is the set of lexical tokens in JavaScript (ECMA5).
const ( // Control. ILLEGAL Token EOF COMMENT KEYWORD // Types. STRING BOOLEAN NULL NUMBER IDENTIFIER // Maths. PLUS // + MINUS // - MULTIPLY // * SLASH // / REMAINDER // % // Logical and bitwise operators. AND // & OR // | EXCLUSIVE_OR // ^ SHIFT_LEFT // << SHIFT_RIGHT // >> UNSIGNED_SHIFT_RIGHT // >>> AND_NOT // &^ // Math assignments. ADD_ASSIGN // += SUBTRACT_ASSIGN // -= MULTIPLY_ASSIGN // *= QUOTIENT_ASSIGN // /= REMAINDER_ASSIGN // %= // Math and bitwise assignments. AND_ASSIGN // &= OR_ASSIGN // |= EXCLUSIVE_OR_ASSIGN // ^= SHIFT_LEFT_ASSIGN // <<= SHIFT_RIGHT_ASSIGN // >>= UNSIGNED_SHIFT_RIGHT_ASSIGN // >>>= AND_NOT_ASSIGN // &^= // Logical operators and decrement / increment. LOGICAL_AND // && LOGICAL_OR // || INCREMENT // ++ DECREMENT // -- // Comparison operators. EQUAL // == STRICT_EQUAL // === LESS // < GREATER // > ASSIGN // = NOT // ! // Bitwise not. BITWISE_NOT // ~ // Comparison operators. NOT_EQUAL // != STRICT_NOT_EQUAL // !== LESS_OR_EQUAL // <= GREATER_OR_EQUAL // >= // Left operators. LEFT_PARENTHESIS // ( LEFT_BRACKET // [ LEFT_BRACE // { COMMA // , PERIOD // . // Right operators. RIGHT_PARENTHESIS // ) RIGHT_BRACKET // ] RIGHT_BRACE // } SEMICOLON // ; COLON // : QUESTION_MARK // ? IF IN DO // Declarations. VAR FOR NEW TRY // Advanced flow. THIS ELSE CASE VOID WITH // Loops. WHILE BREAK CATCH THROW // Functions. RETURN TYPEOF DELETE SWITCH // Fallback identifiers. DEFAULT FINALLY // Miscellaneous. FUNCTION CONTINUE DEBUGGER // Instance of. INSTANCEOF )
func IsKeyword ¶
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 ¶
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").
Source Files