AST2UtilTests.java example

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/*******************************************************************************
 * Copyright (c) 2005, 2010 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:
 *     Rational Software - initial implementation
 *******************************************************************************/
package org.eclipse.cdt.core.parser.tests.ast2;

import org.eclipse.cdt.core.dom.ast.IASTCastExpression;
import org.eclipse.cdt.core.dom.ast.IASTCompoundStatement;
import org.eclipse.cdt.core.dom.ast.IASTDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTEqualsInitializer;
import org.eclipse.cdt.core.dom.ast.IASTFunctionDefinition;
import org.eclipse.cdt.core.dom.ast.IASTReturnStatement;
import org.eclipse.cdt.core.dom.ast.IASTSimpleDeclaration;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
import org.eclipse.cdt.core.dom.ast.IASTTypeIdExpression;
import org.eclipse.cdt.core.dom.ast.IFunction;
import org.eclipse.cdt.core.parser.ParserLanguage;
import org.eclipse.cdt.internal.core.model.ASTStringUtil;
import org.eclipse.cdt.internal.core.parser.scanner.ExpressionEvaluator;

/**
 * @author dsteffle
 */
public class AST2UtilTests extends AST2BaseTest {
	public AST2UtilTests() {
	}

	public AST2UtilTests(String name) {
		super(name);
	}

	public void testSimpleSignature() throws Exception {
	    StringBuffer buff = new StringBuffer();
	    buff.append("int l, m, n=0;\n"); //$NON-NLS-1$
		buff.append("int j = l ? m : n;\n"); //$NON-NLS-1$
		buff.append("int i = l^m;\n"); //$NON-NLS-1$
		buff.append("int g = i<<=j;\n"); //$NON-NLS-1$
		buff.append("int f = sizeof( int );\n"); //$NON-NLS-1$
		buff.append("int e = ~f;\n"); //$NON-NLS-1$
		buff.append("int d = ++e;\n"); //$NON-NLS-1$
		buff.append("int b = d++;\n"); //$NON-NLS-1$
		buff.append("int c = sizeof b;\n"); //$NON-NLS-1$
		buff.append("int a = b + c;\n"); //$NON-NLS-1$
	    
	    IASTTranslationUnit tu = parse(buff.toString(), ParserLanguage.C);
		IASTDeclaration[] d = tu.getDeclarations();
		
		isExpressionStringEqual(((IASTEqualsInitializer)((IASTSimpleDeclaration)d[0]).getDeclarators()[2].getInitializer()).getInitializerClause(), "0"); //$NON-NLS-1$
		isExpressionStringEqual(((IASTEqualsInitializer)((IASTSimpleDeclaration)d[1]).getDeclarators()[0].getInitializer()).getInitializerClause(), "l ? m : n"); //$NON-NLS-1$
		isExpressionStringEqual(((IASTEqualsInitializer)((IASTSimpleDeclaration)d[2]).getDeclarators()[0].getInitializer()).getInitializerClause(), "l ^ m"); //$NON-NLS-1$
		isExpressionStringEqual(((IASTEqualsInitializer)((IASTSimpleDeclaration)d[3]).getDeclarators()[0].getInitializer()).getInitializerClause(), "i <<= j"); //$NON-NLS-1$
		isExpressionStringEqual(((IASTEqualsInitializer)((IASTSimpleDeclaration)d[4]).getDeclarators()[0].getInitializer()).getInitializerClause(), "sizeof(int)"); //$NON-NLS-1$
		isExpressionStringEqual(((IASTEqualsInitializer)((IASTSimpleDeclaration)d[5]).getDeclarators()[0].getInitializer()).getInitializerClause(), "~f"); //$NON-NLS-1$
		isExpressionStringEqual(((IASTEqualsInitializer)((IASTSimpleDeclaration)d[6]).getDeclarators()[0].getInitializer()).getInitializerClause(), "++e"); //$NON-NLS-1$
		isExpressionStringEqual(((IASTEqualsInitializer)((IASTSimpleDeclaration)d[7]).getDeclarators()[0].getInitializer()).getInitializerClause(), "d++"); //$NON-NLS-1$
		isExpressionStringEqual(((IASTEqualsInitializer)((IASTSimpleDeclaration)d[8]).getDeclarators()[0].getInitializer()).getInitializerClause(), "sizeof b"); //$NON-NLS-1$
		isExpressionStringEqual(((IASTEqualsInitializer)((IASTSimpleDeclaration)d[9]).getDeclarators()[0].getInitializer()).getInitializerClause(), "b + c"); //$NON-NLS-1$
	}
	
	public void testSimpleParameter() throws Exception {
	    StringBuffer buff = new StringBuffer();
	    buff.append("int a(int x);\n"); //$NON-NLS-1$
		buff.append("int * b(char y, int x);\n"); //$NON-NLS-1$
		buff.append("void c(int * z, float **b);\n"); //$NON-NLS-1$
		buff.append("static int d(int a[restrict]);\n"); //$NON-NLS-1$
        buff.append("void e(const char* const);\n"); //$NON-NLS-1$
	    
	    IASTTranslationUnit tu = parse(buff.toString(), ParserLanguage.C);
		IASTDeclaration[] d = tu.getDeclarations();
		
		isParameterSignatureEqual(((IASTSimpleDeclaration)d[0]).getDeclarators()[0], "(int)"); //$NON-NLS-1$
		isParameterSignatureEqual(((IASTSimpleDeclaration)d[1]).getDeclarators()[0], "(char, int)"); //$NON-NLS-1$
		isParameterSignatureEqual(((IASTSimpleDeclaration)d[2]).getDeclarators()[0], "(int*, float**)"); //$NON-NLS-1$
		isParameterSignatureEqual(((IASTSimpleDeclaration)d[3]).getDeclarators()[0], "(int[])"); //$NON-NLS-1$
        isParameterSignatureEqual(((IASTSimpleDeclaration)d[4]).getDeclarators()[0], "(const char* const)"); //$NON-NLS-1$
		
		isSignatureEqual(((IASTSimpleDeclaration)d[0]).getDeclarators()[0], "int(int)"); //$NON-NLS-1$
		isSignatureEqual(((IASTSimpleDeclaration)d[1]).getDeclarators()[0], "int*(char, int)"); //$NON-NLS-1$
		isSignatureEqual(((IASTSimpleDeclaration)d[2]).getDeclarators()[0], "void(int*, float**)"); //$NON-NLS-1$
		isSignatureEqual(((IASTSimpleDeclaration)d[3]).getDeclarators()[0], "int(int[])"); //$NON-NLS-1$
        isSignatureEqual(((IASTSimpleDeclaration)d[4]).getDeclarators()[0], "void(const char* const)"); //$NON-NLS-1$
		
		isSignatureEqual(((IASTSimpleDeclaration)d[0]).getDeclSpecifier(), "int"); //$NON-NLS-1$
		isSignatureEqual(((IASTSimpleDeclaration)d[1]).getDeclSpecifier(), "int"); //$NON-NLS-1$
		isSignatureEqual(((IASTSimpleDeclaration)d[2]).getDeclSpecifier(), "void"); //$NON-NLS-1$
		isSignatureEqual(((IASTSimpleDeclaration)d[3]).getDeclSpecifier(), "int"); //$NON-NLS-1$
        isSignatureEqual(((IASTSimpleDeclaration)d[4]).getDeclSpecifier(), "void"); //$NON-NLS-1$
		
		isTypeEqual(((IASTSimpleDeclaration)d[0]).getDeclarators()[0], "int (int)"); //$NON-NLS-1$
		isTypeEqual(((IASTSimpleDeclaration)d[1]).getDeclarators()[0], "int * (char, int)"); //$NON-NLS-1$
		isTypeEqual(((IASTSimpleDeclaration)d[2]).getDeclarators()[0], "void (int *, float * *)"); //$NON-NLS-1$
		isTypeEqual(((IASTSimpleDeclaration)d[3]).getDeclarators()[0], "int (int * restrict)"); //$NON-NLS-1$
        isTypeEqual(((IASTSimpleDeclaration)d[4]).getDeclarators()[0], "void (const char * const)"); //$NON-NLS-1$
		
		isTypeEqual(((IFunction)((IASTSimpleDeclaration)d[0]).getDeclarators()[0].getName().resolveBinding()).getType(), "int (int)"); //$NON-NLS-1$
		isTypeEqual(((IFunction)((IASTSimpleDeclaration)d[1]).getDeclarators()[0].getName().resolveBinding()).getType(), "int * (char, int)"); //$NON-NLS-1$
		isTypeEqual(((IFunction)((IASTSimpleDeclaration)d[2]).getDeclarators()[0].getName().resolveBinding()).getType(), "void (int *, float * *)"); //$NON-NLS-1$
		isTypeEqual(((IFunction)((IASTSimpleDeclaration)d[3]).getDeclarators()[0].getName().resolveBinding()).getType(), "int (int * restrict)"); //$NON-NLS-1$
        isTypeEqual(((IFunction)((IASTSimpleDeclaration)d[4]).getDeclarators()[0].getName().resolveBinding()).getType(), "void (const char * const)"); //$NON-NLS-1$
		
		isParameterTypeEqual(((IFunction)((IASTSimpleDeclaration)d[0]).getDeclarators()[0].getName().resolveBinding()).getType(), "(int)"); //$NON-NLS-1$
		isParameterTypeEqual(((IFunction)((IASTSimpleDeclaration)d[1]).getDeclarators()[0].getName().resolveBinding()).getType(), "(char, int)"); //$NON-NLS-1$
		isParameterTypeEqual(((IFunction)((IASTSimpleDeclaration)d[2]).getDeclarators()[0].getName().resolveBinding()).getType(), "(int *, float * *)"); //$NON-NLS-1$
		isParameterTypeEqual(((IFunction)((IASTSimpleDeclaration)d[3]).getDeclarators()[0].getName().resolveBinding()).getType(), "(int * restrict)"); //$NON-NLS-1$
        isParameterTypeEqual(((IFunction)((IASTSimpleDeclaration)d[4]).getDeclarators()[0].getName().resolveBinding()).getType(), "(const char * const)"); //$NON-NLS-1$
	}
	
	public void testSimpleCParameterSignature() throws Exception {
	    StringBuffer buff = new StringBuffer();
	    buff.append("int a(int x);\n"); //$NON-NLS-1$
		buff.append("int * b(char y, int x);\n"); //$NON-NLS-1$
		buff.append("void c(int * z, float **b);\n"); //$NON-NLS-1$
		buff.append("static int d(int a[restrict]);\n"); //$NON-NLS-1$
	    
	    IASTTranslationUnit tu = parse(buff.toString(), ParserLanguage.C);
		IASTDeclaration[] d = tu.getDeclarations();
		
		isParameterSignatureEqual(((IASTSimpleDeclaration)d[0]).getDeclarators()[0], "(int)"); //$NON-NLS-1$
		isParameterSignatureEqual(((IASTSimpleDeclaration)d[1]).getDeclarators()[0], "(char, int)"); //$NON-NLS-1$
		isParameterSignatureEqual(((IASTSimpleDeclaration)d[2]).getDeclarators()[0], "(int*, float**)"); //$NON-NLS-1$
		isParameterSignatureEqual(((IASTSimpleDeclaration)d[3]).getDeclarators()[0], "(int[])"); //$NON-NLS-1$
	}
	
	public void testSimpleTypeId() throws Exception {
		StringBuffer buff = new StringBuffer();
	    buff.append("int x = sizeof( int );\n"); //$NON-NLS-1$
		buff.append("union Squaw { int x; double u; };\n"); //$NON-NLS-1$
		buff.append("int main(int argc, char **argv) {\n"); //$NON-NLS-1$
		buff.append("return sizeof( union Squaw );\n}\n"); //$NON-NLS-1$
		buff.append("typedef short Z; typedef Z jc;\n"); //$NON-NLS-1$
		buff.append("int y = 4;\n"); //$NON-NLS-1$
		buff.append("jc myJc = (jc)y;\n"); //$NON-NLS-1$
	    
	    IASTTranslationUnit tu = parse(buff.toString(), ParserLanguage.C);
		IASTDeclaration[] d = tu.getDeclarations();
		
		// verify signatures
		isSignatureEqual( ((IASTTypeIdExpression)((IASTEqualsInitializer)((IASTSimpleDeclaration)d[0]).getDeclarators()[0].getInitializer()).getInitializerClause()).getTypeId(), "int"); //$NON-NLS-1$
		isSignatureEqual( ((IASTTypeIdExpression)((IASTReturnStatement)((IASTCompoundStatement)((IASTFunctionDefinition)d[2]).getBody()).getStatements()[0]).getReturnValue()).getTypeId(), "union Squaw"); //$NON-NLS-1$
		isSignatureEqual( ((IASTCastExpression)((IASTEqualsInitializer)((IASTSimpleDeclaration)d[6]).getDeclarators()[0].getInitializer()).getInitializerClause()).getTypeId() , "jc"); //$NON-NLS-1$
		
		// verify types
		isTypeEqual( ((IASTTypeIdExpression)((IASTEqualsInitializer)((IASTSimpleDeclaration)d[0]).getDeclarators()[0].getInitializer()).getInitializerClause()).getTypeId(), "int"); //$NON-NLS-1$
		isTypeEqual( ((IASTTypeIdExpression)((IASTReturnStatement)((IASTCompoundStatement)((IASTFunctionDefinition)d[2]).getBody()).getStatements()[0]).getReturnValue()).getTypeId(), "Squaw"); //$NON-NLS-1$
		isTypeEqual( ((IASTCastExpression)((IASTEqualsInitializer)((IASTSimpleDeclaration)d[6]).getDeclarators()[0].getInitializer()).getInitializerClause()).getTypeId() , "short int"); //$NON-NLS-1$
	}
	
	public void testKnRC() throws Exception {
		StringBuffer buff = new StringBuffer();
	    buff.append("int foo(x, y) char x; int y; {}\n"); //$NON-NLS-1$
		buff.append("int foo2(char x, int y) {}\n"); //$NON-NLS-1$
		
		IASTTranslationUnit tu = parse(buff.toString(), ParserLanguage.C, true);
		IASTDeclaration[] d = tu.getDeclarations();
		
		String fooSignature = ASTStringUtil.getSignatureString(((IASTFunctionDefinition)d[0]).getDeclarator());
		String foo2Signature = ASTStringUtil.getSignatureString(((IASTFunctionDefinition)d[1]).getDeclarator());
		
		assertEquals(fooSignature, foo2Signature);
	}
	
	public void testParseIntegral() throws Exception {
		assertEquals(0, ExpressionEvaluator.getNumber("0".toCharArray()));
		assertEquals(0, ExpressionEvaluator.getNumber("0x0".toCharArray()));
		assertEquals(0, ExpressionEvaluator.getNumber("00".toCharArray()));
		assertEquals(0, ExpressionEvaluator.getNumber("000".toCharArray()));
		assertEquals(0, ExpressionEvaluator.getNumber("0L".toCharArray()));
		assertEquals(0, ExpressionEvaluator.getNumber("0LL".toCharArray()));
		
		assertEquals(1, ExpressionEvaluator.getNumber("1".toCharArray()));
		assertEquals(1, ExpressionEvaluator.getNumber("01".toCharArray()));
		assertEquals(1, ExpressionEvaluator.getNumber("0x1".toCharArray()));
				
		assertEquals(10, ExpressionEvaluator.getNumber("10".toCharArray()));
		assertEquals(8, ExpressionEvaluator.getNumber("010".toCharArray()));
		assertEquals(16, ExpressionEvaluator.getNumber("0x10".toCharArray()));

		assertEquals(10, ExpressionEvaluator.getNumber("10LLL".toCharArray()));
		assertEquals(8, ExpressionEvaluator.getNumber("010LLL".toCharArray()));
		assertEquals(16, ExpressionEvaluator.getNumber("0x10LLL".toCharArray()));
	}
}