Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/expression/Parser.frame @ 21281:326a1f374198
fixed command line parsing for ctw command
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 11 May 2015 12:21:04 +0200 |
parents | 08aa0372dad4 |
children |
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/*------------------------------------------------------------------------- Compiler Generator Coco/R, Copyright (c) 1990, 2004 Hanspeter Moessenboeck, University of Linz extended by M. Loeberbauer & A. Woess, Univ. of Linz ported from C# to Java by Wolfgang Ahorner with improvements by Pat Terry, Rhodes University This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. As an exception, it is allowed to write an extension of Coco/R that is used as a plugin in non-free software. If not otherwise stated, any source code generated by Coco/R (other than Coco/R itself) does not fall under the GNU General Public License. ------------------------------------------------------------------------*/ -->begin package com.oracle.truffle.dsl.processor.expression; import java.util.*; import java.io.*; import java.nio.charset.*; import com.oracle.truffle.dsl.processor.expression.DSLExpression.*; // Checkstyle: stop // @formatter:off class Parser { -->constants static final boolean _T = true; static final boolean _x = false; static final int minErrDist = 2; public Token t; // last recognized token public Token la; // lookahead token int errDist = minErrDist; public final Scanner scanner; public final Errors errors; -->declarations public Parser(InputStream input) { this.scanner = new Scanner(input); errors = new Errors(); } void SynErr(int n) { if (errDist >= minErrDist) errors.SynErr(la.line, la.col, n); errDist = 0; } public void SemErr(String msg) { if (errDist >= minErrDist) errors.SemErr(t.line, t.col, msg); errDist = 0; } void Get() { for (;;) { t = la; la = scanner.Scan(); if (la.kind <= maxT) { ++errDist; break; } -->pragmas la = t; } } void Expect(int n) { if (la.kind == n) Get(); else { SynErr(n); } } boolean StartOf(int s) { return set[s][la.kind]; } void ExpectWeak(int n, int follow) { if (la.kind == n) Get(); else { SynErr(n); while (!StartOf(follow)) Get(); } } boolean WeakSeparator(int n, int syFol, int repFol) { int kind = la.kind; if (kind == n) { Get(); return true; } else if (StartOf(repFol)) return false; else { SynErr(n); while (!(set[syFol][kind] || set[repFol][kind] || set[0][kind])) { Get(); kind = la.kind; } return StartOf(syFol); } } -->productions private DSLExpression parseImpl() { la = new Token(); la.val = ""; Get(); DSLExpression result = -->parseRoot return result; } private static final boolean[][] set = { -->initialization }; public static DSLExpression parse(InputStream input) { Parser parser = new Parser(input); DSLExpression result = parser.parseImpl(); if (parser.errors.errors.size() > 0) { StringBuilder msg = new StringBuilder(); for (String error : parser.errors.errors) { msg.append(error).append("\n"); } throw new InvalidExpressionException(msg.toString()); } return result; } public static DSLExpression parse(String s) { return parse(new ByteArrayInputStream(s.getBytes(StandardCharsets.UTF_8))); } } // end Parser class Errors { protected final List<String> errors = new ArrayList<>(); public String errMsgFormat = "-- line {0} col {1}: {2}"; // 0=line, 1=column, 2=text protected void printMsg(int line, int column, String msg) { StringBuffer b = new StringBuffer(errMsgFormat); int pos = b.indexOf("{0}"); if (pos >= 0) { b.delete(pos, pos + 3); b.insert(pos, line); } pos = b.indexOf("{1}"); if (pos >= 0) { b.delete(pos, pos + 3); b.insert(pos, column); } pos = b.indexOf("{2}"); if (pos >= 0) b.replace(pos, pos + 3, msg); errors.add(b.toString()); } public void SynErr(int line, int col, int n) { String s; switch (n) {-->errors default: s = "error " + n; break; } printMsg(line, col, s); } public void SemErr(int line, int col, String s) { printMsg(line, col, s); } public void SemErr(String s) { errors.add(s); } public void Warning(int line, int col, String s) { printMsg(line, col, s); } public void Warning(String s) { errors.add(s); } } // Errors class FatalError extends RuntimeException { public static final long serialVersionUID = 1L; public FatalError(String s) { super(s); } }