Mercurial Hosting > luan
view core/src/luan/impl/ParseException.java @ 609:24b05963ba62
shell "clear" button now clears the session
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Wed, 09 Dec 2015 18:12:16 -0700 |
parents | 3dcb0f9bee82 |
children | 859c0dedc8b6 |
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package luan.impl; import luan.LuanSource; public final class ParseException extends Exception { public final LuanSource src; public final int iCurrent; public final int iHigh; ParseException(String msg,LuanSource src,int iCurrent,int iHigh) { super(msg); this.src = src; 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 = src.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 src.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 " + src.name + "\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(); } }