Implement C++ DR299, which allows an implicit conversion from a class

type to an integral or enumeration type in the size of an array new
expression, e.g.,

  new int[ConvertibleToInt(10)];

This is a GNU and C++0x extension.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@107229 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 27 insertions, 0 deletions

diff --git a/test/SemaCXX/new-array-size-conv.cpp b/test/SemaCXX/new-array-size-conv.cpp
new file mode 100644
index 0000000000..80219a9062
--- /dev/null
+++ b/test/SemaCXX/new-array-size-conv.cpp
@@ -0,0 +1,27 @@
+// RUN: %clang_cc1 -fsyntax-only -pedantic -verify %s
+
+struct ValueInt
+{
+  ValueInt(int v = 0) : ValueLength(v) {}
+  operator int () const { return ValueLength; } // expected-note 3{{conversion to integral type 'int' declared here}}
+private:
+  int ValueLength;
+};
+
+enum E { e };
+struct ValueEnum {
+  operator E() const; // expected-note{{conversion to enumeration type 'E' declared here}}
+};
+
+struct ValueBoth : ValueInt, ValueEnum { };
+
+struct IndirectValueInt : ValueInt { };
+struct TwoValueInts : ValueInt, IndirectValueInt { };
+
+void test() {
+  (void)new int[ValueInt(10)]; // expected-warning{{implicit conversion from array size expression of type 'ValueInt' to integral type 'int' is a C++0x extension}}
+  (void)new int[ValueEnum()]; // expected-warning{{implicit conversion from array size expression of type 'ValueEnum' to enumeration type 'E' is a C++0x extension}}
+  (void)new int[ValueBoth()]; // expected-error{{ambiguous conversion of array size expression of type 'ValueBoth' to an integral or enumeration type}}
+
+  (void)new int[TwoValueInts()]; // expected-error{{ambiguous conversion of array size expression of type 'TwoValueInts' to an integral or enumeration type}}
+}