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Code Issues Wiki Activity

Bug 294730: Default template arguments for function templates.

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This commit is contained in:
Markus Schorn 2010-02-08 13:22:48 +00:00
parent 84a04a9f2a
commit c6176c6b67
3 changed files with 27 additions and 1 deletions
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2
core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2BaseTest.java
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@ -497,7 +497,7 @@ public class AST2BaseTest extends BaseTestCase {
public <T extends IBinding> T assertNonProblem(String section, int len) {
if (len <= 0)
len= section.length()-len;
len= section.length()+len;
IBinding binding= binding(section, len);
if (binding instanceof IProblemBinding) {
IProblemBinding problem= (IProblemBinding) binding;

23
core/org.eclipse.cdt.core.tests/parser/org/eclipse/cdt/core/parser/tests/ast2/AST2TemplateTests.java
View file

@ -4754,4 +4754,27 @@ public class AST2TemplateTests extends AST2BaseTest {
final String code= getAboveComment();
parseAndCheckBindings(code, ParserLanguage.CPP);
}
// template <class T, class U = double> void f(T t = 0, U u = 0);
// void g() {
// f(1, 'c'); // f<int,char>(1,'c')
// f(1); // f<int,double>(1,0)
// f(); // error: T cannot be deduced
// f<int>(); // f<int,double>(0,0)
// f<int,char>(); // f<int,char>(0,0)
// }
public void testDefaultTemplateArgsForFunctionTemplates_294730() throws Exception {
final String code= getAboveComment();
BindingAssertionHelper bh= new BindingAssertionHelper(code, true);
ICPPTemplateInstance f= bh.assertNonProblem("f(1, 'c');", 1);
assertEquals("<int,char>", ASTTypeUtil.getArgumentListString(f.getTemplateArguments(), true));
f= bh.assertNonProblem("f(1);", 1);
assertEquals("<int,double>", ASTTypeUtil.getArgumentListString(f.getTemplateArguments(), true));
bh.assertProblem("f();", 1);
f= bh.assertNonProblem("f<int>();", -3);
assertEquals("<int,double>", ASTTypeUtil.getArgumentListString(f.getTemplateArguments(), true));
f= bh.assertNonProblem("f<int,char>();", -3);
assertEquals("<int,char>", ASTTypeUtil.getArgumentListString(f.getTemplateArguments(), true));
}
}

3
core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/dom/parser/cpp/semantics/TemplateArgumentDeduction.java
View file

@ -364,6 +364,9 @@ public class TemplateArgumentDeduction {
deducedArg= tpar.getDefaultValue();
if (deducedArg != null) {
deducedArg= CPPTemplates.instantiateArgument(deducedArg, tpMap, -1, null);
if (deducedArg != null) {
tpMap.put(tpar, deducedArg);
}
}
}
if (deducedArg == null)