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Add unused result attr to the casting templates
This helped catch a couple of bugs locally. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199793 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -15,6 +15,7 @@
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#ifndef LLVM_SUPPORT_CASTING_H
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#define LLVM_SUPPORT_CASTING_H
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/type_traits.h"
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#include <cassert>
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@ -131,7 +132,7 @@ struct isa_impl_wrap<To, FromTy, FromTy> {
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// if (isa<Type>(myVal)) { ... }
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//
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template <class X, class Y>
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inline bool isa(const Y &Val) {
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LLVM_ATTRIBUTE_UNUSED_RESULT inline bool isa(const Y &Val) {
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return isa_impl_wrap<X, const Y,
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typename simplify_type<const Y>::SimpleType>::doit(Val);
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}
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@ -245,7 +246,8 @@ inline typename cast_retty<X, Y *>::ret_type cast(Y *Val) {
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// accepted.
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//
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template <class X, class Y>
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inline typename cast_retty<X, Y*>::ret_type cast_or_null(Y *Val) {
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LLVM_ATTRIBUTE_UNUSED_RESULT inline typename cast_retty<X, Y *>::ret_type
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cast_or_null(Y *Val) {
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if (Val == 0) return 0;
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assert(isa<X>(Val) && "cast_or_null<Ty>() argument of incompatible type!");
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return cast<X>(Val);
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@ -261,19 +263,21 @@ inline typename cast_retty<X, Y*>::ret_type cast_or_null(Y *Val) {
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//
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template <class X, class Y>
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inline typename enable_if_c<!is_simple_type<Y>::value,
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typename cast_retty<X, const Y>::ret_type>::type
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LLVM_ATTRIBUTE_UNUSED_RESULT inline typename enable_if_c<
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!is_simple_type<Y>::value, typename cast_retty<X, const Y>::ret_type>::type
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dyn_cast(const Y &Val) {
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return isa<X>(Val) ? cast<X>(Val) : 0;
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}
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template <class X, class Y>
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inline typename cast_retty<X, Y>::ret_type dyn_cast(Y &Val) {
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LLVM_ATTRIBUTE_UNUSED_RESULT inline typename cast_retty<X, Y>::ret_type
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dyn_cast(Y &Val) {
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return isa<X>(Val) ? cast<X>(Val) : 0;
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}
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template <class X, class Y>
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inline typename cast_retty<X, Y *>::ret_type dyn_cast(Y *Val) {
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LLVM_ATTRIBUTE_UNUSED_RESULT inline typename cast_retty<X, Y *>::ret_type
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dyn_cast(Y *Val) {
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return isa<X>(Val) ? cast<X>(Val) : 0;
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}
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@ -281,7 +285,8 @@ inline typename cast_retty<X, Y *>::ret_type dyn_cast(Y *Val) {
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// value is accepted.
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//
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template <class X, class Y>
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inline typename cast_retty<X, Y*>::ret_type dyn_cast_or_null(Y *Val) {
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LLVM_ATTRIBUTE_UNUSED_RESULT inline typename cast_retty<X, Y *>::ret_type
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dyn_cast_or_null(Y *Val) {
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return (Val && isa<X>(Val)) ? cast<X>(Val) : 0;
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}
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