llvm-project/clang/test/Analysis/sizeofpack.cpp

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// RUN: %clang_analyze_cc1 -analyzer-checker=core,debug.ExprInspection \
// RUN: -verify %s
typedef __typeof(sizeof(int)) size_t;
void clang_analyzer_eval(bool);
template <int... N> size_t foo() {
return sizeof...(N);
}
void bar() {
clang_analyzer_eval(foo<>() == 0); // expected-warning{{TRUE}}
clang_analyzer_eval(foo<1, 2, 3>() == 3); // expected-warning{{TRUE}}
}