经典代码JSKeyword查看（M。。。$）的哦！
namespace ----
{
internal sealed class JSKeyword{
private JSKeyword next;
private JSToken token;
private string name;
private int length;
private JSKeyword(JSToken token, string name){
this.name = name;
this.next = null;
this.token = token;
this.length = this.name.Length;
}
private JSKeyword(JSToken token, string name, JSKeyword next){
this.name = name;
this.next = next;
this.token = token;
this.length = this.name.Length;
}
internal static string CanBeIdentifier(JSToken keyword){
switch (keyword){
case JSToken.Abstract: return "abstract";
case JSToken.Assert: return "assert";
case JSToken.Boolean: return "boolean";
case JSToken.Byte: return "byte";
case JSToken.Char: return "char";
case JSToken.Decimal: return "decimal";
case JSToken.Double: return "double";
case JSToken.Ensure: return "ensure";
case JSToken.Enum: return "enum";
case JSToken.Event: return "event";
case JSToken.Final: return "final";
case JSToken.Float: return "float";
case JSToken.Get: return "get";
case JSToken.Goto: return "goto";
case JSToken.Implements: return "implements";
case JSToken.Int: return "int";
case JSToken.Interface: return "interface";
case JSToken.Internal: return "internal";
case JSToken.Invariant: return "invariant";
case JSToken.Long: return "long";
case JSToken.Namespace: return "namespace";
case JSToken.Native: return "native";
case JSToken.Package: return "package";
case JSToken.Private: return "private";
case JSToken.Protected: return "protected";
case JSToken.Public: return "public";
case JSToken.Require: return "require";
case JSToken.Sbyte: return "sbyte";
case JSToken.Set: return "set";
case JSToken.Short: return "short";
case JSToken.Static: return "static";
case JSToken.Synchronized: return "synchronized";
case JSToken.Throws: return "throws";
case JSToken.Transient: return "transient";
case JSToken.Void: return "void";
case JSToken.Volatile: return "volatile";
case JSToken.Uint : return "uint";
case JSToken.Ulong : return "ulong";
case JSToken.Ushort : return "ushort";
case JSToken.Use : return "use";
default: return null;
}
}
internal JSToken GetKeyword(Context token, int length){
JSKeyword keyword = this;
nextToken:
while (null != keyword){
if (length == keyword.length){
// we know the first char has to match
for (int i = 1, j = token.startPos + 1; i < length; i++, j++){
char ch1 = keyword.name[i];
char ch2 = token.source_string[j];
if (ch1 == ch2)
continue;
else if (ch2 < ch1)
return JSToken.Identifier;
else{
keyword = keyword.next;
goto nextToken;
}
}
return keyword.token;
}else if (length < keyword.length)
return JSToken.Identifier;
keyword = keyword.next;
}
return JSToken.Identifier;
}
internal static JSKeyword[] InitKeywords(){
JSKeyword[] keywords = new JSKeyword[26];
JSKeyword keyword;
// a
keyword = new JSKeyword(JSToken.Abstract, "abstract");
keyword = new JSKeyword(JSToken.Assert, "assert", keyword);
keywords['a' - 'a'] = keyword;
// b
keyword = new JSKeyword(JSToken.Boolean, "boolean");
keyword = new JSKeyword(JSToken.Break, "break", keyword);
keyword = new JSKeyword(JSToken.Byte, "byte", keyword);
keywords['b' - 'a'] = keyword;
// c
keyword = new JSKeyword(JSToken.Continue, "continue");
keyword = new JSKeyword(JSToken.Const, "const", keyword);
keyword = new JSKeyword(JSToken.Class, "class", keyword);
keyword = new JSKeyword(JSToken.Catch, "catch", keyword);
keyword = new JSKeyword(JSToken.Char, "char", keyword);
keyword = new JSKeyword(JSToken.Case, "case", keyword);
keywords['c' - 'a'] = keyword;
// d
keyword= new JSKeyword(JSToken.Debugger, "debugger");
keyword = new JSKeyword(JSToken.Default, "default", keyword);
keyword = new JSKeyword(JSToken.Double, "double", keyword);
keyword = new JSKeyword(JSToken.Delete, "delete", keyword);
keyword = new JSKeyword(JSToken.Do, "do", keyword);
keywords['d' - 'a'] = keyword;
// e
keyword = new JSKeyword(JSToken.Extends, "extends");
keyword = new JSKeyword(JSToken.Export, "export", keyword);
keyword = new JSKeyword(JSToken.Ensure, "ensure", keyword);
keyword = new JSKeyword(JSToken.Event, "event", keyword);
keyword = new JSKeyword(JSToken.Enum, "enum", keyword);
keyword = new JSKeyword(JSToken.Else, "else", keyword);
keywords['e' - 'a'] = keyword;
// f
keyword = new JSKeyword(JSToken.Function, "function");
keyword = new JSKeyword(JSToken.Finally, "finally", keyword);
keyword = new JSKeyword(JSToken.Float, "float", keyword);
keyword = new JSKeyword(JSToken.Final, "final", keyword);
keyword = new JSKeyword(JSToken.False, "false", keyword);
keyword = new JSKeyword(JSToken.For, "for", keyword);
keywords['f' - 'a'] = keyword;
// g
keyword = new JSKeyword(JSToken.Goto, "goto");
keyword = new JSKeyword(JSToken.Get, "get", keyword);
keywords['g' - 'a'] = keyword;
// i
keyword = new JSKeyword(JSToken.Instanceof, "instanceof");
keyword = new JSKeyword(JSToken.Implements, "implements", keyword);
keyword = new JSKeyword(JSToken.Invariant, "invariant", keyword);
keyword = new JSKeyword(JSToken.Interface, "interface", keyword);
keyword = new JSKeyword(JSToken.Internal, "internal", keyword);
keyword = new JSKeyword(JSToken.Import, "import", keyword);
keyword = new JSKeyword(JSToken.Int, "int", keyword);
keyword = new JSKeyword(JSToken.In, "in", keyword);
keyword = new JSKeyword(JSToken.If, "if", keyword);
keywords['i' - 'a'] = keyword;
// l
keyword = new JSKeyword(JSToken.Long, "long");
keywords['l' - 'a'] = keyword;
// n
keyword = new JSKeyword(JSToken.Namespace, "namespace");
keyword = new JSKeyword(JSToken.Native, "native", keyword);
keyword = new JSKeyword(JSToken.Null, "null", keyword);
keyword = new JSKeyword(JSToken.New, "new", keyword);
keywords['n' - 'a'] = keyword;
// p
keyword = new JSKeyword(JSToken.Protected, "protected");
keyword = new JSKeyword(JSToken.Private, "private", keyword);
keyword = new JSKeyword(JSToken.Package, "package", keyword);
keyword = new JSKeyword(JSToken.Public, "public", keyword);
keywords['p' - 'a'] = keyword;
// r
keyword = new JSKeyword(JSToken.Require, "require");
keyword = new JSKeyword(JSToken.Return, "return", keyword);
keywords['r' - 'a'] = keyword;
// s
keyword = new JSKeyword(JSToken.Synchronized, "synchronized");
keyword = new JSKeyword(JSToken.Switch, "switch", keyword);
keyword = new JSKeyword(JSToken.Static, "static", keyword);
keyword = new JSKeyword(JSToken.Super, "super", keyword);
keyword = new JSKeyword(JSToken.Short, "short", keyword);
keyword = new JSKeyword(JSToken.Set, "set", keyword);
keywords['s' - 'a'] = keyword;
// t
keyword = new JSKeyword(JSToken.Transient, "transient");
keyword = new JSKeyword(JSToken.Typeof, "typeof", keyword);
keyword = new JSKeyword(JSToken.Throws, "throws", keyword);
keyword = new JSKeyword(JSToken.Throw, "throw", keyword);
keyword = new JSKeyword(JSToken.True, "true", keyword);
keyword = new JSKeyword(JSToken.This, "this", keyword);
keyword = new JSKeyword(JSToken.Try, "try", keyword);
keywords['t' - 'a'] = keyword;
// v
keyword = new JSKeyword(JSToken.Volatile, "volatile");
keyword = new JSKeyword(JSToken.Void, "void", keyword);
keyword = new JSKeyword(JSToken.Var, "var", keyword);
keywords['v' - 'a'] = keyword;
// u
keyword = new JSKeyword(JSToken.Use, "use");
keywords['u' - 'a'] = keyword;
// w
keyword = new JSKeyword(JSToken.While, "while");
keyword = new JSKeyword(JSToken.With, "with", keyword);
keywords['w' - 'a'] = keyword;
return keywords;
}
}
}
