Mercurial Hosting > luan
diff src/luan/impl/ParseException.java @ 775:1a68fc55a80c
simplify dir structure
author | Franklin Schmidt <fschmidt@gmail.com> |
---|---|
date | Fri, 26 Aug 2016 14:36:40 -0600 |
parents | core/src/luan/impl/ParseException.java@b620b8e1010f |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/luan/impl/ParseException.java Fri Aug 26 14:36:40 2016 -0600 @@ -0,0 +1,57 @@ +package luan.impl; + + +public final class ParseException extends Exception { +// public final LuanSource src; + public final String sourceName; + public final String text; + public final int iCurrent; + public final int iHigh; + + ParseException(String msg,String text,String sourceName,int iCurrent,int iHigh) { + super(msg); +// this.src = src; + this.text = text; + this.sourceName = sourceName; + this.iCurrent = iCurrent; + this.iHigh = iHigh; +//System.out.println("iCurrent = "+iCurrent); +//System.out.println("iHigh = "+iHigh); + } + + private class Location { + final int line; + final int pos; + + Location(int index) { + int line = 0; + int i = -1; + while(true) { + int j = text.indexOf('\n',i+1); + if( j == -1 || j >= index ) + break; + i = j; + line++; + } + this.line = line; + this.pos = index - i - 1; + } + } + + private String[] lines() { + return text.split("\n",-1); + } + + public String getFancyMessage() { + Location loc = new Location(iCurrent); + String line = lines()[loc.line]; + String msg = getMessage() + " (line " + (loc.line+1) + ", pos " + (loc.pos+1) + ") in " + sourceName + "\n"; + StringBuilder sb = new StringBuilder(msg); + sb.append( line + "\n" ); + for( int i=0; i<loc.pos; i++ ) { + sb.append( line.charAt(i)=='\t' ? '\t' : ' ' ); + } + sb.append("^\n"); + return sb.toString(); + } +}