r179688 - DR974: Lambdas can have default arguments.
Richard Smith
richard-llvm at metafoo.co.uk
Wed Apr 17 09:25:20 PDT 2013
Author: rsmith
Date: Wed Apr 17 11:25:20 2013
New Revision: 179688
URL: http://llvm.org/viewvc/llvm-project?rev=179688&view=rev
Log:
DR974: Lambdas can have default arguments.
Modified:
cfe/trunk/include/clang/Basic/DiagnosticGroups.td
cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
cfe/trunk/lib/Sema/SemaDeclCXX.cpp
cfe/trunk/test/CXX/expr/expr.prim/expr.prim.lambda/default-arguments.cpp
cfe/trunk/test/CXX/expr/expr.prim/expr.prim.lambda/p5.cpp
Modified: cfe/trunk/include/clang/Basic/DiagnosticGroups.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticGroups.td?rev=179688&r1=179687&r2=179688&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/DiagnosticGroups.td (original)
+++ cfe/trunk/include/clang/Basic/DiagnosticGroups.td Wed Apr 17 11:25:20 2013
@@ -254,7 +254,6 @@ def : DiagGroup<"strict-overflow=5">;
def : DiagGroup<"strict-overflow">;
def InvalidOffsetof : DiagGroup<"invalid-offsetof">;
-def LambdaExtensions : DiagGroup<"lambda-extensions">;
def : DiagGroup<"strict-prototypes">;
def StrictSelector : DiagGroup<"strict-selector-match">;
def MethodDuplicate : DiagGroup<"duplicate-method-match">;
Modified: cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=179688&r1=179687&r2=179688&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td (original)
+++ cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td Wed Apr 17 11:25:20 2013
@@ -4789,9 +4789,6 @@ let CategoryName = "Lambda Issue" in {
"incomplete result type %0 in lambda expression">;
def err_lambda_objc_object_result : Error<
"non-pointer Objective-C class type %0 in lambda expression result">;
- def ext_lambda_default_arguments : ExtWarn<
- "C++11 forbids default arguments for lambda expressions">,
- InGroup<LambdaExtensions>;
def err_noreturn_lambda_has_return_expr : Error<
"lambda declared 'noreturn' should not return">;
def warn_maybe_falloff_nonvoid_lambda : Warning<
Modified: cfe/trunk/lib/Sema/SemaDeclCXX.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclCXX.cpp?rev=179688&r1=179687&r2=179688&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaDeclCXX.cpp (original)
+++ cfe/trunk/lib/Sema/SemaDeclCXX.cpp Wed Apr 17 11:25:20 2013
@@ -636,22 +636,12 @@ void Sema::CheckCXXDefaultArguments(Func
bool IsLambda = FD->getOverloadedOperator() == OO_Call &&
isa<CXXMethodDecl>(FD) &&
cast<CXXMethodDecl>(FD)->getParent()->isLambda();
-
+
// Find first parameter with a default argument
for (p = 0; p < NumParams; ++p) {
ParmVarDecl *Param = FD->getParamDecl(p);
- if (Param->hasDefaultArg()) {
- // C++11 [expr.prim.lambda]p5:
- // [...] Default arguments (8.3.6) shall not be specified in the
- // parameter-declaration-clause of a lambda-declarator.
- //
- // FIXME: Core issue 974 strikes this sentence, we only provide an
- // extension warning.
- if (IsLambda)
- Diag(Param->getLocation(), diag::ext_lambda_default_arguments)
- << Param->getDefaultArgRange();
+ if (Param->hasDefaultArg())
break;
- }
}
// C++ [dcl.fct.default]p4:
Modified: cfe/trunk/test/CXX/expr/expr.prim/expr.prim.lambda/default-arguments.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/expr/expr.prim/expr.prim.lambda/default-arguments.cpp?rev=179688&r1=179687&r2=179688&view=diff
==============================================================================
--- cfe/trunk/test/CXX/expr/expr.prim/expr.prim.lambda/default-arguments.cpp (original)
+++ cfe/trunk/test/CXX/expr/expr.prim/expr.prim.lambda/default-arguments.cpp Wed Apr 17 11:25:20 2013
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -Wno-lambda-extensions -verify
+// RUN: %clang_cc1 -fsyntax-only -std=c++11 %s -verify
void defargs() {
auto l1 = [](int i, int j = 17, int k = 18) { return i + j + k; };
Modified: cfe/trunk/test/CXX/expr/expr.prim/expr.prim.lambda/p5.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/expr/expr.prim/expr.prim.lambda/p5.cpp?rev=179688&r1=179687&r2=179688&view=diff
==============================================================================
--- cfe/trunk/test/CXX/expr/expr.prim/expr.prim.lambda/p5.cpp (original)
+++ cfe/trunk/test/CXX/expr/expr.prim/expr.prim.lambda/p5.cpp Wed Apr 17 11:25:20 2013
@@ -39,12 +39,10 @@ void test_quals() {
bogus_override_if_virtual<decltype(l)> bogus;
}
-// Default arguments (8.3.6) shall not be specified in the
-// parameter-declaration-clause of a lambda- declarator.
-// Note: Removed by core issue 974.
+// Core issue 974: default arguments (8.3.6) may be specified in the
+// parameter-declaration-clause of a lambda-declarator.
int test_default_args() {
- return [](int i = 5, // expected-warning{{C++11 forbids default arguments for lambda expressions}}
- int j = 17) { return i+j;}(5, 6);
+ return [](int i = 5, int j = 17) { return i+j;}(5, 6);
}
// Any exception-specification specified on a lambda-expression
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