85 lines
2.0 KiB
TypeScript
85 lines
2.0 KiB
TypeScript
|
|
||
|
|
import { RegExpUtility } from "../RegExpUtitlity";
|
||
|
|
import { Lexer } from "./Lexer";
|
||
|
|
|
||
|
|
export class LexerMatcher
|
||
|
|
{
|
||
|
|
_mode:string;
|
||
|
|
_type:string;
|
||
|
|
_nextMode:string;
|
||
|
|
_matcher:RegExp;
|
||
|
|
compressTokens:boolean = false;
|
||
|
|
|
||
|
|
get mode(){ return this._mode; }
|
||
|
|
get type(){ return this._type; }
|
||
|
|
get nextMode(){ return this._nextMode ? this._nextMode : this._mode; }
|
||
|
|
get matcher() { return this._matcher; }
|
||
|
|
|
||
|
|
constructor( type:string, matcher:RegExp, mode:string = Lexer.defaultMode, nextMode:string=null )
|
||
|
|
{
|
||
|
|
this._type = type;
|
||
|
|
this._matcher = RegExpUtility.makeSticky( matcher );
|
||
|
|
this._mode = mode;
|
||
|
|
this._nextMode = nextMode;
|
||
|
|
}
|
||
|
|
|
||
|
|
getMatch( value:string, index:number = 0, alternative:string = null)
|
||
|
|
{
|
||
|
|
let result = this._matcher.exec( value );
|
||
|
|
|
||
|
|
if ( ! result || result.length <= index )
|
||
|
|
{
|
||
|
|
return alternative;
|
||
|
|
}
|
||
|
|
|
||
|
|
return result[ index ];
|
||
|
|
}
|
||
|
|
|
||
|
|
matchLength( source:string, offset:number )
|
||
|
|
{
|
||
|
|
this._matcher.lastIndex = offset;
|
||
|
|
var result = this._matcher.exec( source );
|
||
|
|
|
||
|
|
if ( result && result.index != offset )
|
||
|
|
{
|
||
|
|
var message = "Illegal match index! Not a sticky matcher: " + this._matcher + ".";
|
||
|
|
message += "Offset: " + offset + " Matched Index: " + result.index ;
|
||
|
|
throw message;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( result )
|
||
|
|
{
|
||
|
|
return result[ 0 ].length;
|
||
|
|
}
|
||
|
|
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
getMatchResult( source:string, offset:number )
|
||
|
|
{
|
||
|
|
this._matcher.lastIndex = offset;
|
||
|
|
var result = this._matcher.exec( source );
|
||
|
|
|
||
|
|
if ( result && result.index != offset )
|
||
|
|
{
|
||
|
|
var message = "Illegal match index! Not a sticky matcher: " + this._matcher + ".";
|
||
|
|
message += "Offset: " + offset + " Matched Index: " + result.index ;
|
||
|
|
throw message;
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
isMatching( source:string )
|
||
|
|
{
|
||
|
|
let matchLength = this.matchLength( source, 0 );
|
||
|
|
|
||
|
|
if ( matchLength === source.length )
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|