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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Narcissus JavaScript engine.
*
* The Initial Developer of the Original Code is
* Brendan Eich <brendan@mozilla.org>.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* Narcissus - JS implemented in JS.
*
* Well-known constants and lookup tables. Many consts are generated from the
* tokens table via eval to minimize redundancy, so consumers must be compiled
* separately to take advantage of the simple switch-case constant propagation
* done by SpiderMonkey.
*/
// jrh
//module('JS.Defs');
GLOBAL = this;
var tokens = [
// End of source.
"END",
// Operators and punctuators. Some pair-wise order matters, e.g. (+, -)
// and (UNARY_PLUS, UNARY_MINUS).
"\n", ";",
",",
"=",
"?", ":", "CONDITIONAL",
"||",
"&&",
"|",
"^",
"&",
"==", "!=", "===", "!==",
"<", "<=", ">=", ">",
"<<", ">>", ">>>",
"+", "-",
"*", "/", "%",
"!", "~", "UNARY_PLUS", "UNARY_MINUS",
"++", "--",
".",
"[", "]",
"{", "}",
"(", ")",
// Nonterminal tree node type codes.
"SCRIPT", "BLOCK", "LABEL", "FOR_IN", "CALL", "NEW_WITH_ARGS", "INDEX",
"ARRAY_INIT", "OBJECT_INIT", "PROPERTY_INIT", "GETTER", "SETTER",
"GROUP", "LIST",
// Terminals.
"IDENTIFIER", "NUMBER", "STRING", "REGEXP",
// Keywords.
"break",
"case", "catch", "const", "continue",
"debugger", "default", "delete", "do",
"else", "enum",
"false", "finally", "for", "function",
"if", "in", "instanceof",
"new", "null",
"return",
"switch",
"this", "throw", "true", "try", "typeof",
"var", "void",
"while", "with",
// Extensions
"require", "bless", "mixin", "import"
];
// Operator and punctuator mapping from token to tree node type name.
// NB: superstring tokens (e.g., ++) must come before their substring token
// counterparts (+ in the example), so that the opRegExp regular expression
// synthesized from this list makes the longest possible match.
var opTypeNames = {
'\n': "NEWLINE",
';': "SEMICOLON",
',': "COMMA",
'?': "HOOK",
':': "COLON",
'||': "OR",
'&&': "AND",
'|': "BITWISE_OR",
'^': "BITWISE_XOR",
'&': "BITWISE_AND",
'===': "STRICT_EQ",
'==': "EQ",
'=': "ASSIGN",
'!==': "STRICT_NE",
'!=': "NE",
'<<': "LSH",
'<=': "LE",
'<': "LT",
'>>>': "URSH",
'>>': "RSH",
'>=': "GE",
'>': "GT",
'++': "INCREMENT",
'--': "DECREMENT",
'+': "PLUS",
'-': "MINUS",
'*': "MUL",
'/': "DIV",
'%': "MOD",
'!': "NOT",
'~': "BITWISE_NOT",
'.': "DOT",
'[': "LEFT_BRACKET",
']': "RIGHT_BRACKET",
'{': "LEFT_CURLY",
'}': "RIGHT_CURLY",
'(': "LEFT_PAREN",
')': "RIGHT_PAREN"
};
// Hash of keyword identifier to tokens index. NB: we must null __proto__ to
// avoid toString, etc. namespace pollution.
var keywords = {__proto__: null};
// Define const END, etc., based on the token names. Also map name to index.
var consts = " ";
for (var i = 0, j = tokens.length; i < j; i++) {
if (i > 0)
consts += "; ";
var t = tokens[i];
if (/^[a-z]/.test(t)) {
consts += t.toUpperCase();
keywords[t] = i;
} else {
consts += (/^\W/.test(t) ? opTypeNames[t] : t);
}
consts += " = " + i;
tokens[t] = i;
}
eval(consts + ";");
// Map assignment operators to their indexes in the tokens array.
var assignOps = ['|', '^', '&', '<<', '>>', '>>>', '+', '-', '*', '/', '%'];
for (i = 0, j = assignOps.length; i < j; i++) {
t = assignOps[i];
assignOps[t] = tokens[t];
}
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