Mercurial > hg > graal-compiler
view graal/com.oracle.truffle.sl/src/com/oracle/truffle/sl/parser/Parser.frame @ 13654:32af063cc29c
Don't create null guards for values that are already known to be non-null.
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Thu, 16 Jan 2014 12:18:29 +0100 |
parents | 71991b7a0f14 |
children | 7c418666c6c9 |
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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.sl.parser; import java.util.*; import com.oracle.truffle.sl.*; import com.oracle.truffle.sl.nodes.*; // Checkstyle: stop // @formatter:off public 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; private final SLNodeFactory factory; -->declarations public Parser(Scanner scanner, SLNodeFactory factory) { this.scanner = scanner; this.factory = factory; 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 public void Parse() { la = new Token(); la.val = ""; Get(); -->parseRoot } private static final boolean[][] set = { -->initialization }; public String ParseErrors() { java.io.PrintStream oldStream = System.out; java.io.OutputStream out = new java.io.ByteArrayOutputStream(); java.io.PrintStream newStream = new java.io.PrintStream(out); errors.errorStream = newStream; Parse(); String errorStream = out.toString(); errors.errorStream = oldStream; return errorStream; } } // end Parser class Errors { public int count = 0; // number of errors detected public java.io.PrintStream errorStream = System.out; // error messages go to this stream 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); errorStream.println(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); count++; } public void SemErr(int line, int col, String s) { printMsg(line, col, s); count++; } public void SemErr(String s) { errorStream.println(s); count++; } public void Warning(int line, int col, String s) { printMsg(line, col, s); } public void Warning(String s) { errorStream.println(s); } } // Errors class FatalError extends RuntimeException { public static final long serialVersionUID = 1L; public FatalError(String s) { super(s); } }