Fix -Wdouble-promotion

mborland · mborland · commit 3b980175365d · 2026-05-06T16:08:30.000-04:00
diff --git a/include/boost/safe_numbers/literals.hpp b/include/boost/safe_numbers/literals.hpp
@@ -143,7 +143,7 @@ BOOST_SAFE_NUMBERS_EXPORT constexpr auto operator ""_i128(const char* str) -> i1
 
 BOOST_SAFE_NUMBERS_EXPORT constexpr auto operator ""_f32(const long double val) -> f32
 {
-    if (constexpr long double max_value {std::numeric_limits<float>::max()}; val > max_value)
+    if (constexpr auto max_value {static_cast<long double>(std::numeric_limits<float>::max())}; val > max_value)
     {
         BOOST_SAFE_NUMBERS_THROW_EXCEPTION(std::overflow_error, "Overflow detected in literal construction");
     }
@@ -153,7 +153,7 @@ BOOST_SAFE_NUMBERS_EXPORT constexpr auto operator ""_f32(const long double val)
 
 BOOST_SAFE_NUMBERS_EXPORT constexpr auto operator ""_f64(const long double val) -> f64
 {
-    if (constexpr long double max_value {std::numeric_limits<double>::max()}; val > max_value)
+    if (constexpr auto max_value {static_cast<long double>(std::numeric_limits<double>::max())}; val > max_value)
     {
         BOOST_SAFE_NUMBERS_THROW_EXCEPTION(std::overflow_error, "Overflow detected in literal construction");
     }

Original file line number	Diff line number	Diff line change
`@@ -143,7 +143,7 @@ BOOST_SAFE_NUMBERS_EXPORT constexpr auto operator ""_i128(const char* str) -> i1`
`143`	`143`
`144`	`144`	`BOOST_SAFE_NUMBERS_EXPORT constexpr auto operator ""_f32(const long double val) -> f32`
`145`	`145`	`{`
`146`		`- if (constexpr long double max_value {std::numeric_limits<float>::max()}; val > max_value)`
	`146`	`+ if (constexpr auto max_value {static_cast<long double>(std::numeric_limits<float>::max())}; val > max_value)`
`147`	`147`	`{`
`148`	`148`	`BOOST_SAFE_NUMBERS_THROW_EXCEPTION(std::overflow_error, "Overflow detected in literal construction");`
`149`	`149`	`}`
`@@ -153,7 +153,7 @@ BOOST_SAFE_NUMBERS_EXPORT constexpr auto operator ""_f32(const long double val)`
`153`	`153`
`154`	`154`	`BOOST_SAFE_NUMBERS_EXPORT constexpr auto operator ""_f64(const long double val) -> f64`
`155`	`155`	`{`
`156`		`- if (constexpr long double max_value {std::numeric_limits<double>::max()}; val > max_value)`
	`156`	`+ if (constexpr auto max_value {static_cast<long double>(std::numeric_limits<double>::max())}; val > max_value)`
`157`	`157`	`{`
`158`	`158`	`BOOST_SAFE_NUMBERS_THROW_EXCEPTION(std::overflow_error, "Overflow detected in literal construction");`
`159`	`159`	`}`