refactor

client/src/BranFlakesParseRunner.ts

@@ -0,0 +1,56 @@
+import { CharStreams, CommonTokenStream, RecognitionException } from 'antlr4ts';
+import { DiagnosticSeverity } from 'vscode-languageserver-types';
+import { bfLexer } from './generated/bfLexer';
+import { bfParser } from './generated/bfParser';
+
+
+export interface TranslationError {
+    line: number;
+    charPositionInLine: number;
+    msg: string;
+    source?: any;
+    type: DiagnosticSeverity;
+    error?: RecognitionException;
+}
+
+export function getTree(str: string, fn: string) {
+	const charStreams = CharStreams.fromString(str, fn);
+	const lexer = new bfLexer(charStreams);
+	const issues: TranslationError[] = [];
+	// remove the error listener. We want to put our own
+	
+	lexer.removeErrorListeners();
+	lexer.addErrorListener({
+		syntaxError(source, o, line, charPositionInLine, msg, error) {
+			issues.push({
+				line,
+				charPositionInLine,
+				msg,
+				type: DiagnosticSeverity.Error,
+				source,
+				error,
+			});
+		},
+	});
+
+	const tokenStreams = new CommonTokenStream(lexer);
+	const parser = new bfParser(tokenStreams);
+
+	// remove the error listener. We want to put our own
+	parser.removeErrorListeners();
+	parser.addErrorListener({
+		syntaxError(source, o, line, charPositionInLine, msg, error) {
+			issues.push({
+				line,
+				charPositionInLine,
+				msg,
+				type: DiagnosticSeverity.Error,
+				source,
+				error,
+			});
+		},
+	});
+	const tree = parser.program();
+
+	return { tree, issues, tokenStreams, charStreams };
+}