================
@@ -0,0 +1,141 @@
+// RUN: %clang_cc1 -fsyntax-only -fblocks -fcxx-exceptions -verify %s
+// RUN: %clang_cc1 -fsyntax-only -fblocks -verify -x c -std=c23 %s
+
+#if !__has_attribute(nonblocking)
+#error "the 'nonblocking' attribute is not available"
+#endif
+
+// --- ATTRIBUTE SYNTAX: SUBJECTS ---
+
+int nl_var [[clang::nonblocking]]; // expected-warning {{'nonblocking' only
applies to function types; type here is 'int'}}
+struct nl_struct {} [[clang::nonblocking]]; // expected-warning {{attribute
'nonblocking' is ignored, place it after "struct" to apply attribute to type
declaration}}
+struct [[clang::nonblocking]] nl_struct2 {}; // expected-error {{'nonblocking'
attribute cannot be applied to a declaration}}
+
+// Positive case
+typedef void (*fo)() [[clang::nonblocking]];
+void (*read_me_and_weep(
+ int val, void (*func)(int) [[clang::nonblocking]])
+ [[clang::nonblocking]]) (int)
+ [[clang::nonblocking]];
+
+// --- ATTRIBUTE SYNTAX: ARGUMENT COUNT ---
+void nargs_1() [[clang::nonblocking(1, 2)]]; // expected-error
{{'nonblocking' attribute takes no more than 1 argument}}
+void nargs_2() [[clang::nonallocating(1, 2)]]; // expected-error
{{'nonallocating' attribute takes no more than 1 argument}}
+void nargs_3() [[clang::blocking(1)]]; // expected-error {{'blocking'
attribute takes no arguments}}
+void nargs_4() [[clang::allocating(1)]]; // expected-error {{'allocating'
attribute takes no arguments}}
+
+// --- ATTRIBUTE SYNTAX: COMBINATIONS ---
+// Check invalid combinations of nonblocking/nonallocating attributes
+
+void nl_true_false_1() [[clang::nonblocking(true)]] [[clang::blocking]]; //
expected-error {{'blocking' and 'nonblocking' attributes are not compatible}}
----------------
dougsonos wrote:
done
https://github.com/llvm/llvm-project/pull/84983
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