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/*******************************************************************************
* Copyright (c) 2006, 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.core.dom.lrparser;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.Set;
import org.eclipse.cdt.core.dom.ICodeReaderFactory;
import org.eclipse.cdt.core.dom.ast.IASTCompletionNode;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
import org.eclipse.cdt.core.dom.ast.gnu.c.GCCLanguage;
import org.eclipse.cdt.core.dom.ast.gnu.cpp.GPPLanguage;
import org.eclipse.cdt.core.dom.parser.CLanguageKeywords;
import org.eclipse.cdt.core.dom.parser.IScannerExtensionConfiguration;
import org.eclipse.cdt.core.index.IIndex;
import org.eclipse.cdt.core.model.AbstractLanguage;
import org.eclipse.cdt.core.model.ICLanguageKeywords;
import org.eclipse.cdt.core.model.ILanguage;
import org.eclipse.cdt.core.parser.CodeReader;
import org.eclipse.cdt.core.parser.IParserLogService;
import org.eclipse.cdt.core.parser.IScanner;
import org.eclipse.cdt.core.parser.IScannerInfo;
import org.eclipse.cdt.core.parser.ParserLanguage;
import org.eclipse.cdt.core.parser.util.ASTPrinter;
import org.eclipse.cdt.core.parser.util.DebugUtil;
import org.eclipse.cdt.internal.core.dom.parser.ASTNode;
import org.eclipse.cdt.internal.core.dom.parser.ASTTranslationUnit;
import org.eclipse.cdt.internal.core.dom.parser.c.CASTTranslationUnit;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTTranslationUnit;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPNodeFactory;
import org.eclipse.cdt.internal.core.parser.scanner.CPreprocessor;
import org.eclipse.cdt.internal.core.pdom.dom.IPDOMLinkageFactory;
import org.eclipse.cdt.internal.core.pdom.dom.c.PDOMCLinkageFactory;
import org.eclipse.cdt.internal.core.pdom.dom.cpp.PDOMCPPLinkageFactory;
import org.eclipse.core.runtime.CoreException;
/**
* Implementation of the ILanguage extension point,
* provides the ability to add LPG based languages to CDT.
*
* @author Mike Kucera
*/
@SuppressWarnings("restriction")
public abstract class BaseExtensibleLanguage extends AbstractLanguage {
private static final boolean DEBUG_PRINT_GCC_AST = false;
private static final boolean DEBUG_PRINT_AST = false;
/**
* Retrieve the parser (runs after the preprocessor runs).
*
* Can be overridden in subclasses to provide a different parser
* for a language extension.
*/
protected abstract IParser getParser();
/**
* A token map is used to map tokens from the DOM preprocessor
* to the tokens defined by an LPG parser.
*/
protected abstract IDOMTokenMap getTokenMap();
/**
* Normally all the AST nodes are created by the parser, but we
* need the root node ahead of time.
*
* The preprocessor is responsible for creating preprocessor AST nodes,
* so the preprocessor needs access to the translation unit so that it can
* set the parent pointers on the AST nodes it creates.
*
* @return an IASTTranslationUnit object thats empty and will be filled in by the parser
*/
protected abstract IASTTranslationUnit createASTTranslationUnit();
/**
* Returns the ParserLanguage value that is to be used when creating
* an instance of CPreprocessor.
*
*/
protected abstract ParserLanguage getParserLanguage();
/**
* Returns the scanner extension configuration for this language, may not return null
*/
protected abstract IScannerExtensionConfiguration getScannerExtensionConfiguration();
@SuppressWarnings("nls")
@Override
public IASTTranslationUnit getASTTranslationUnit(CodeReader reader, IScannerInfo scanInfo,
ICodeReaderFactory fileCreator, IIndex index, int options, IParserLogService log) throws CoreException {
IASTTranslationUnit gtu = null;
if(DEBUG_PRINT_GCC_AST) {
System.out.println();
System.out.println("********************************************************");
System.out.println("Parsing");
System.out.println("Options: " + options);
ILanguage gppLanguage = getParserLanguage() == ParserLanguage.CPP ? GPPLanguage.getDefault() : GCCLanguage.getDefault();
gtu = gppLanguage.getASTTranslationUnit(reader, scanInfo, fileCreator, index, options, log);
System.out.println("GPP AST:");
ASTPrinter.print(gtu);
System.out.println();
}
IScannerExtensionConfiguration config = getScannerExtensionConfiguration();
ParserLanguage pl = getParserLanguage();
IScanner preprocessor = new CPreprocessor(reader, scanInfo, pl, log, config, fileCreator);
preprocessor.setScanComments((options & OPTION_ADD_COMMENTS) != 0);
preprocessor.setComputeImageLocations((options & ILanguage.OPTION_NO_IMAGE_LOCATIONS) == 0);
// The translation unit has to be created here so that the preprocessor
// can fill in the preprocessor AST nodes.
IASTTranslationUnit tu = getASTTranslationUnit(index, preprocessor);
IParser parser = getParser();
CPreprocessorAdapter.runCPreprocessor(preprocessor, parser, getTokenMap(), tu);
Set<IParser.Options> parserOptions = new HashSet<IParser.Options>();
//if((options & OPTION_SKIP_FUNCTION_BODIES) != 0)
// parserOptions.add(IParser.Options.OPTION_SKIP_FUNCTION_BODIES);
if((options & OPTION_SKIP_TRIVIAL_EXPRESSIONS_IN_AGGREGATE_INITIALIZERS) != 0)
parserOptions.add(IParser.Options.OPTION_SKIP_TRIVIAL_EXPRESSIONS_IN_AGGREGATE_INITIALIZERS);
if(!parserOptions.isEmpty())
parserOptions = EnumSet.copyOf(parserOptions);
parser.parse(tu, parserOptions); // The parser will fill in the rest of the AST
// the TU is marked as either a source file or a header file
tu.setIsHeaderUnit((options & OPTION_IS_SOURCE_UNIT) == 0);
if(DEBUG_PRINT_AST) {
System.out.println("Base Extensible Language AST:");
ASTPrinter.print(tu);
}
return tu;
}
public IASTTranslationUnit getASTTranslationUnit(CodeReader reader,
IScannerInfo scanInfo, ICodeReaderFactory fileCreator,
IIndex index, IParserLogService log) throws CoreException {
return getASTTranslationUnit(reader, scanInfo, fileCreator, index, 0, log);
}
@SuppressWarnings("nls")
public IASTCompletionNode getCompletionNode(CodeReader reader,
IScannerInfo scanInfo, ICodeReaderFactory fileCreator,
IIndex index, IParserLogService log, int offset) throws CoreException {
IASTCompletionNode cn;
if(DEBUG_PRINT_GCC_AST) {
ILanguage gppLanguage = GCCLanguage.getDefault();
cn = gppLanguage.getCompletionNode(reader, scanInfo, fileCreator, index, log, offset);
System.out.println();
System.out.println("********************************************************");
System.out.println("GPP AST:");
printCompletionNode(cn);
}
IScannerExtensionConfiguration config = getScannerExtensionConfiguration();
ParserLanguage pl = getParserLanguage();
IScanner preprocessor = new CPreprocessor(reader, scanInfo, pl, log, config, fileCreator);
preprocessor.setContentAssistMode(offset);
IParser parser = getParser();
IASTTranslationUnit tu = getASTTranslationUnit(index, preprocessor);
CPreprocessorAdapter.runCPreprocessor(preprocessor, parser, getTokenMap(), tu);
// the parser will fill in the rest of the AST
Set<IParser.Options> parserOptions = EnumSet.of(IParser.Options.OPTION_SKIP_TRIVIAL_EXPRESSIONS_IN_AGGREGATE_INITIALIZERS);
IASTCompletionNode completionNode = parser.parse(tu, parserOptions);
if(DEBUG_PRINT_AST) {
System.out.println("Base Extensible Language AST:");
printCompletionNode(completionNode);
}
return completionNode;
}
private IASTTranslationUnit getASTTranslationUnit(IIndex index, IScanner preprocessor) {
IASTTranslationUnit tu = createASTTranslationUnit();
tu.setIndex(index);
if(tu instanceof ASTTranslationUnit) {
((ASTTranslationUnit)tu).setLocationResolver(preprocessor.getLocationResolver());
}
return tu;
}
/*
* For debugging.
*/
@SuppressWarnings("nls")
private static void printCompletionNode(IASTCompletionNode cn) {
if(cn == null) {
System.out.println("Completion node is null");
return;
}
ASTPrinter.print(cn.getTranslationUnit());
for(IASTName name : cn.getNames()) {
ASTNode context = (ASTNode)name.getCompletionContext();
System.out.printf("Name: %s, Context: %s, At: %d",
name, DebugUtil.safeClassName(context), context == null ? null : context.getOffset());
if(name.getTranslationUnit() == null) // some name nodes are not hooked up to the AST
System.out.print(", not hooked up");
System.out.println();
}
System.out.println();
}
public IASTName[] getSelectedNames(IASTTranslationUnit ast, int start, int length) {
return GCCLanguage.getDefault().getSelectedNames(ast, start, length);
}
private ICLanguageKeywords cLanguageKeywords = new CLanguageKeywords(getParserLanguage(), getScannerExtensionConfiguration());
@SuppressWarnings("unchecked")
@Override
public Object getAdapter(Class adapter) {
if(ICLanguageKeywords.class.equals(adapter))
return cLanguageKeywords;
if(IPDOMLinkageFactory.class.equals(adapter)) {
if(getParserLanguage().isCPP())
return new PDOMCPPLinkageFactory();
return new PDOMCLinkageFactory();
}
return super.getAdapter(adapter);
}
}
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