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[272995] - fixed f.p. and f.n

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Alena Laskavaia 2009-04-21 00:37:15 +00:00
parent eaf73307bc
commit d02fb6433d
1 changed files with 24 additions and 1 deletions
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25
codan/org.eclipse.cdt.codan.checkers/src/org/eclipse/cdt/codan/checkers/sample/StatementHasNoEffectChecker.java
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@ -15,9 +15,14 @@ import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTBinaryExpression; import org.eclipse.cdt.core.dom.ast.IASTBinaryExpression;
import org.eclipse.cdt.core.dom.ast.IASTExpression; import org.eclipse.cdt.core.dom.ast.IASTExpression;
import org.eclipse.cdt.core.dom.ast.IASTExpressionStatement; import org.eclipse.cdt.core.dom.ast.IASTExpressionStatement;
import org.eclipse.cdt.core.dom.ast.IASTIdExpression;
import org.eclipse.cdt.core.dom.ast.IASTStatement; import org.eclipse.cdt.core.dom.ast.IASTStatement;
import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit; import org.eclipse.cdt.core.dom.ast.IASTTranslationUnit;
import org.eclipse.cdt.core.dom.ast.IASTUnaryExpression; import org.eclipse.cdt.core.dom.ast.IASTUnaryExpression;
import org.eclipse.cdt.core.dom.ast.IBasicType;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPFunction;
import org.eclipse.cdt.internal.core.dom.parser.cpp.CPPASTBinaryExpression;
/** /**
* Checker that detects statements without effect such as * Checker that detects statements without effect such as
@ -66,7 +71,21 @@ public class StatementHasNoEffectChecker extends AbstractIndexAstChecker {
private boolean hasNoEffect(IASTExpression e) { private boolean hasNoEffect(IASTExpression e) {
if (e instanceof IASTBinaryExpression) { if (e instanceof IASTBinaryExpression) {
IASTBinaryExpression binExpr = (IASTBinaryExpression) e; IASTBinaryExpression binExpr = (IASTBinaryExpression) e;
return binExpr.getOperator() != IASTBinaryExpression.op_assign; if (binExpr.getOperator() == IASTBinaryExpression.op_assign)
return false;
if (binExpr instanceof CPPASTBinaryExpression) {
CPPASTBinaryExpression cppBin = (CPPASTBinaryExpression) binExpr;
ICPPFunction overload = cppBin.getOverload();
if (overload != null)
return false;
IType expressionType = binExpr.getOperand1()
.getExpressionType();
if (!(expressionType instanceof IBasicType)) {
return false; // must be overloaded but parser could not
// find it
}
}
return true;
} }
if (e instanceof IASTUnaryExpression) { if (e instanceof IASTUnaryExpression) {
IASTUnaryExpression unaryExpr = (IASTUnaryExpression) e; IASTUnaryExpression unaryExpr = (IASTUnaryExpression) e;
@ -80,6 +99,10 @@ public class StatementHasNoEffectChecker extends AbstractIndexAstChecker {
} }
return true; return true;
} }
if (e instanceof IASTIdExpression) {
// simply a;
return true;
}
return false; return false;
} }
} }