derek.holloway
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74 lines
3.1 KiB
C++
74 lines
3.1 KiB
C++
// RUN: %check_clang_tidy %s bugprone-narrowing-conversions %t \
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// RUN: -- -- -target x86_64-unknown-linux -fsigned-char
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namespace floats {
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void narrow_constant_floating_point_to_int_not_ok(double d) {
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int i = 0;
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i += 0.5;
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// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: narrowing conversion from constant 'double' to 'int' [bugprone-narrowing-conversions]
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i += 0.5f;
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// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: narrowing conversion from constant 'float' to 'int' [bugprone-narrowing-conversions]
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i *= 0.5f;
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// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: narrowing conversion from constant 'float' to 'int' [bugprone-narrowing-conversions]
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i /= 0.5f;
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// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: narrowing conversion from constant 'float' to 'int' [bugprone-narrowing-conversions]
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i += (double)0.5f;
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// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: narrowing conversion from constant 'double' to 'int' [bugprone-narrowing-conversions]
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i += 2.0;
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i += 2.0f;
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}
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double operator"" _double(unsigned long long);
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float narrow_double_to_float_return() {
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return 0.5;
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}
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void narrow_double_to_float_not_ok(double d) {
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float f;
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f = d;
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: narrowing conversion from 'double' to 'float' [bugprone-narrowing-conversions]
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f = 15_double;
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: narrowing conversion from 'double' to 'float' [bugprone-narrowing-conversions]
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f += d;
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// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: narrowing conversion from 'double' to 'float' [bugprone-narrowing-conversions]
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f = narrow_double_to_float_return();
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}
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float narrow_float16_to_float_return(_Float16 f) {
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return f;
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}
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_Float16 narrow_float_to_float16_return(float f) {
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return f;
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// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: narrowing conversion from 'float' to '_Float16' [bugprone-narrowing-conversions]
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}
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void narrow_fp_constants() {
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float f;
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f = 0.5; // [dcl.init.list] 7.2 : in-range fp constant to narrower float is not a narrowing.
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f = __builtin_huge_valf(); // max float is not narrowing.
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f = -__builtin_huge_valf(); // -max float is not narrowing.
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f = __builtin_inff(); // float infinity is not narrowing.
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f = __builtin_nanf("0"); // float NaN is not narrowing.
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f = __builtin_huge_val(); // max double is not within-range of float.
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: narrowing conversion from constant 'double' to 'float' [bugprone-narrowing-conversions]
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f = -__builtin_huge_val(); // -max double is not within-range of float.
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: narrowing conversion from constant 'double' to 'float' [bugprone-narrowing-conversions]
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f = __builtin_inf(); // double infinity is not within-range of float.
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: narrowing conversion from constant 'double' to 'float' [bugprone-narrowing-conversions]
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f = __builtin_nan("0"); // double NaN is not narrowing.
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}
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double false_positive_const_qualified_cast(bool t) {
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double b = 1.0;
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constexpr double a = __builtin_huge_val();
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// PR49498 The constness difference of 'a' and 'b' results in an implicit cast.
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return t ? b : a;
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}
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} // namespace floats
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