java-projects/Own-Programming-Language-Tutorial
1
0
Fork 0
mirror of https://github.com/aNNiMON/Own-Programming-Language-Tutorial.git synced 2024-09-20 00:34:20 +03:00
Code Issues Packages Projects Releases Wiki Activity

Add parse errors formatter

Browse Source
This commit is contained in:
aNNiMON 2023-09-30 23:55:00 +03:00 committed by Victor Melnik
parent 0d820c8a91
commit 2578f0a6b4
2 changed files with 65 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
ownlang-desktop/src/main/java/com/annimon/ownlang/Main.java
View File

@ -154,7 +154,9 @@ public final class Main {
.then(scopedStages.create("Execution", new ExecutionStage()))
.perform(stagesData, input);
} catch (OwnLangParserException ex) {
System.err.println(ex.getParseErrors());
final var error = new ParseErrorsFormatterStage()
.perform(stagesData, ex.getParseErrors());
System.err.println(error);
} catch (StoppedException ex) {
// skip
} catch (Exception ex) {

62
ownlang-parser/src/main/java/com/annimon/ownlang/stages/ParseErrorsFormatterStage.java Normal file
View File

@ -0,0 +1,62 @@
package com.annimon.ownlang.stages;
import com.annimon.ownlang.Console;
import com.annimon.ownlang.parser.Pos;
import com.annimon.ownlang.parser.Range;
import com.annimon.ownlang.parser.error.ParseError;
import com.annimon.ownlang.parser.error.ParseErrors;
public class ParseErrorsFormatterStage implements Stage<ParseErrors, String> {
@Override
public String perform(StagesData stagesData, ParseErrors input) {
final var sb = new StringBuilder();
final String source = stagesData.get(SourceLoaderStage.TAG_SOURCE);
final var lines = source.split("\r?\n");
for (ParseError parseError : input) {
sb.append(Console.newline());
sb.append(parseError);
sb.append(Console.newline());
final Range range = parseError.range().normalize();
printPosition(sb, range, lines);
if (parseError.hasStackTrace()) {
sb.append("Stack trace:");
sb.append(Console.newline());
for (StackTraceElement el : parseError.stackTraceElements()) {
sb.append(" ").append(el).append(Console.newline());
}
}
}
return sb.toString();
}
private static void printPosition(StringBuilder sb, Range range, String[] lines) {
final Pos start = range.start();
final int linesCount = lines.length;;
if (range.isOnSameLine()) {
if (start.row() < linesCount) {
sb.append(lines[start.row()]);
sb.append(Console.newline());
sb.append(" ".repeat(start.col()));
sb.append("^".repeat(range.end().col() - start.col() + 1));
sb.append(Console.newline());
}
} else {
if (start.row() < linesCount) {
String line = lines[start.row()];
sb.append(line);
sb.append(Console.newline());
sb.append(" ".repeat(start.col()));
sb.append("^".repeat(Math.max(1, line.length() - start.col())));
sb.append(Console.newline());
}
final Pos end = range.end();
if (end.row() < linesCount) {
sb.append(lines[end.row()]);
sb.append(Console.newline());
sb.append("^".repeat(end.col()));
sb.append(Console.newline());
}
}
}
}