public int getOffset() { return scanner.getOffset(); } public boolean atEnd() { return scanner.isEnd(); }
public int getOffset() { return scanner.getOffset(); } public boolean atEnd() { return scanner.isEnd(); }
public Maybe<String> stringFromStart(int start) { int end = getOffset() - getCurrent().getContent().length(); return start <= end ? new Maybe<>(input.rawSubstring(start, end)) : Maybe.noString; }
public Maybe<String> stringFromStart(int start) { int end = getOffset() - getCurrent().getContent().length(); return start <= end ? new Maybe<>(input.rawSubstring(start, end)) : Maybe.noString; }
public Symbol parse(Parser parser, Scanner scanner) { Symbol result = new Symbol(SymbolType.SymbolList); result.setStartOffset(scanner.getOffset()); while (true) { Maybe<Symbol> parsedSymbol = parseSymbol(parser, scanner); if (parsedSymbol.isNothing()) { break; } else { result.add(parsedSymbol.getValue()); } } result.setEndOffset(scanner.getOffset()); return result; }
public Symbol parse(Parser parser, Scanner scanner) { Symbol result = new Symbol(SymbolType.SymbolList); result.setStartOffset(scanner.getOffset()); while (true) { Maybe<Symbol> parsedSymbol = parseSymbol(parser, scanner); if (parsedSymbol.isNothing()) { break; } else { result.add(parsedSymbol.getValue()); } } result.setEndOffset(scanner.getOffset()); return result; }
public Maybe<String> parseToAsString(SymbolType terminator) { int start = scanner.getOffset(); scanner.markStart(); parseTo(terminator); if (!atEnd() && !getCurrent().isType(terminator)) return Maybe.noString; return scanner.stringFromStart(start); }
public Maybe<String> parseToAsString(SymbolType terminator) { int start = scanner.getOffset(); scanner.markStart(); parseTo(terminator); if (!atEnd() && !getCurrent().isType(terminator)) return Maybe.noString; return scanner.stringFromStart(start); }
/** * * @param parser parser * @param scanner scanner * @return a possible value if parser should stop. */ public Maybe<Symbol> parseSymbol(Parser parser, Scanner scanner) { while (true) { Scanner backup = new Scanner(scanner); scanner.moveNextIgnoreFirst(this); if (scanner.isEnd()) return Maybe.nothingBecause("scanner is at end of buffer"); Symbol currentToken = scanner.getCurrent(); int startOffset = currentToken.getStartOffset(); if (endsOn(currentToken.getType()) || parser.parentOwns(currentToken.getType(), this)) { scanner.copy(backup); return Maybe.nothingBecause("At termination symbol or parent owns symbol"); } if (terminatesOn(currentToken.getType())) return Maybe.nothingBecause("At termination symbol"); Rule currentRule = currentToken.getType().getWikiRule(); Maybe<Symbol> parsedSymbol = currentRule.parse(currentToken, parser); if (parsedSymbol.isNothing()) { ignoreFirst(currentToken.getType()); scanner.copy(backup); } else { parsedSymbol.getValue().setStartOffset(startOffset).setEndOffset(scanner.getOffset()); clearIgnoresFirst(); return parsedSymbol; } } }
/** * * @param parser parser * @param scanner scanner * @return a possible value if parser should stop. */ public Maybe<Symbol> parseSymbol(Parser parser, Scanner scanner) { while (true) { Scanner backup = new Scanner(scanner); scanner.moveNextIgnoreFirst(this); if (scanner.isEnd()) return Maybe.nothingBecause("scanner is at end of buffer"); Symbol currentToken = scanner.getCurrent(); int startOffset = currentToken.getStartOffset(); if (endsOn(currentToken.getType()) || parser.parentOwns(currentToken.getType(), this)) { scanner.copy(backup); return Maybe.nothingBecause("At termination symbol or parent owns symbol"); } if (terminatesOn(currentToken.getType())) return Maybe.nothingBecause("At termination symbol"); Rule currentRule = currentToken.getType().getWikiRule(); Maybe<Symbol> parsedSymbol = currentRule.parse(currentToken, parser); if (parsedSymbol.isNothing()) { ignoreFirst(currentToken.getType()); scanner.copy(backup); } else { parsedSymbol.getValue().setStartOffset(startOffset).setEndOffset(scanner.getOffset()); clearIgnoresFirst(); return parsedSymbol; } } }