65 lines
1.6 KiB
Plaintext
65 lines
1.6 KiB
Plaintext
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// RUN: %clang_analyze_cc1 -Wno-unused -std=c++11 -analyzer-checker=core,debug.ExprInspection -verify %s
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// RUN: %clang_analyze_cc1 -Wno-unused -std=c++17 -analyzer-checker=core,debug.ExprInspection -verify %s
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// RUN: %clang_analyze_cc1 -Wno-unused -std=c++11 -analyzer-checker=core,debug.ExprInspection -DMOVES -verify %s
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// RUN: %clang_analyze_cc1 -Wno-unused -std=c++17 -analyzer-checker=core,debug.ExprInspection -DMOVES -verify %s
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void clang_analyzer_eval(bool);
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void clang_analyzer_checkInlined(bool);
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template <typename T> struct AddressVector {
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T *buf[10];
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int len;
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AddressVector() : len(0) {}
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void push(T *t) {
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buf[len] = t;
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++len;
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}
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};
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class C {
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AddressVector<C> &v;
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public:
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C(AddressVector<C> &v) : v(v) { v.push(this); }
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~C() { v.push(this); }
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#ifdef MOVES
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C(C &&c) : v(c.v) { v.push(this); }
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#endif
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// Note how return-statements prefer move-constructors when available.
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C(const C &c) : v(c.v) {
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#ifdef MOVES
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clang_analyzer_checkInlined(false); // no-warning
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#else
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v.push(this);
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#endif
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} // no-warning
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};
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@interface NSObject {}
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@end;
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@interface Foo: NSObject {}
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-(C) make: (AddressVector<C> &)v;
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@end
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@implementation Foo
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-(C) make: (AddressVector<C> &)v {
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return C(v);
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}
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@end
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void testReturnByValueFromMessage(Foo *foo) {
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AddressVector<C> v;
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{
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const C &c = [foo make: v];
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}
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// 0. Construct the return value of -make (copy/move elided) and
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// lifetime-extend it directly via reference 'c',
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// 1. Destroy the temporary lifetime-extended by 'c'.
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clang_analyzer_eval(v.len == 2); // expected-warning{{TRUE}}
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clang_analyzer_eval(v.buf[0] == v.buf[1]); // expected-warning{{TRUE}}
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}
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