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b92a1565c3
lvalue-to-rvalue conversion adjusts lvalues of qualified, non-class type to rvalue expressions of the unqualified variant of that type. For example, given: const int i; (void)(i + 17); the lvalue-to-rvalue conversion for the subexpression "i" will turn it from an lvalue expression (a DeclRefExpr) with type 'const int' into an rvalue expression with type 'int'. Both C and C++ mandate this conversion, and somehow we've slid through without implementing it. We now have both DefaultFunctionArrayConversion and DefaultFunctionArrayLvalueConversion, and which gets used depends on whether we do the lvalue-to-rvalue conversion or not. Generally, we do the lvalue-to-rvalue conversion, but there are a few notable exceptions: - the left-hand side of a '.' operator - the left-hand side of an assignment - a C++ throw expression - a subscript expression that's subscripting a vector Making this change exposed two issues with blocks: - we were deducing const-qualified return types of non-class type from a block return, which doesn't fit well - we weren't always setting the known return type of a block when it was provided with the ^return-type syntax Fixes the current Clang-on-Clang compile failure and PR6076. llvm-svn: 95167
74 lines
1.5 KiB
C++
74 lines
1.5 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -pedantic -std=c++98 -verify -triple x86_64-apple-darwin %s
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enum E {
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Val1,
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Val2
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};
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int& enumerator_type(int);
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float& enumerator_type(E);
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void f() {
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E e = Val1;
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float& fr = enumerator_type(Val2);
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}
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// <rdar://problem/6502934>
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typedef enum Foo {
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A = 0,
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B = 1
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} Foo;
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void bar() {
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Foo myvar = A;
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myvar = B;
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}
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/// PR3688
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struct s1 {
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enum e1 (*bar)(void); // expected-error{{ISO C++ forbids forward references to 'enum' types}}
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};
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enum e1 { YES, NO };
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static enum e1 badfunc(struct s1 *q) {
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return q->bar();
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}
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enum e2; // expected-error{{ISO C++ forbids forward references to 'enum' types}}
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namespace test1 {
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template <class A, class B> struct is_same { static const int value = -1; };
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template <class A> struct is_same<A,A> { static const int value = 1; };
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enum enum0 { v0 };
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int test0[is_same<__typeof(+v0), int>::value];
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enum enum1 { v1 = __INT_MAX__ };
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int test1[is_same<__typeof(+v1), int>::value];
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enum enum2 { v2 = __INT_MAX__ * 2U };
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int test2[is_same<__typeof(+v2), unsigned int>::value];
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enum enum3 { v3 = __LONG_MAX__ };
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int test3[is_same<__typeof(+v3), long>::value];
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enum enum4 { v4 = __LONG_MAX__ * 2UL };
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int test4[is_same<__typeof(+v4), unsigned long>::value];
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}
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// PR6061
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namespace PR6061 {
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struct A { enum { id }; };
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struct B { enum { id }; };
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struct C : public A, public B
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{
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enum { id };
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};
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}
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namespace Conditional {
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enum a { A }; a x(const enum a x) { return 1?x:A; }
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}
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