derek.holloway
7502bf64a4
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34 lines
1.2 KiB
C++
34 lines
1.2 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify -triple x86_64-apple-darwin %s
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// This file tests -Wconstant-conversion, a subcategory of -Wconversion
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// which is on by default.
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constexpr int nines() { return 99999; }
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void too_big_for_char(int param) {
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char warn1 = false ? 0 : 99999;
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// expected-warning@-1 {{implicit conversion from 'int' to 'char' changes value from 99999 to -97}}
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char warn2 = false ? 0 : nines();
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// expected-warning@-1 {{implicit conversion from 'int' to 'char' changes value from 99999 to -97}}
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char warn3 = param > 0 ? 0 : 99999;
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// expected-warning@-1 {{implicit conversion from 'int' to 'char' changes value from 99999 to -97}}
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char warn4 = param > 0 ? 0 : nines();
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// expected-warning@-1 {{implicit conversion from 'int' to 'char' changes value from 99999 to -97}}
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char ok1 = true ? 0 : 99999;
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char ok2 = true ? 0 : nines();
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char ok3 = true ? 0 : 99999 + 1;
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char ok4 = true ? 0 : nines() + 1;
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}
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void test_bitfield() {
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struct S {
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int one_bit : 1;
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} s;
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s.one_bit = 1; // expected-warning {{implicit truncation from 'int' to a one-bit wide bit-field changes value from 1 to -1}}
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s.one_bit = true; // no-warning
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}
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