tmp/tmp5bun4u3i/{from.md → to.md}
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| 1 |
+
### Integer comparison functions <a id="utility.intcmp">[[utility.intcmp]]</a>
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``` cpp
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template<class T, class U>
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constexpr bool cmp_equal(T t, U u) noexcept;
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```
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*Mandates:* Both `T` and `U` are standard integer types or extended
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integer types [[basic.fundamental]].
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*Effects:* Equivalent to:
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``` cpp
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using UT = make_unsigned_t<T>;
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using UU = make_unsigned_t<U>;
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if constexpr (is_signed_v<T> == is_signed_v<U>)
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return t == u;
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else if constexpr (is_signed_v<T>)
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return t < 0 ? false : UT(t) == u;
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else
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return u < 0 ? false : t == UU(u);
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```
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``` cpp
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template<class T, class U>
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constexpr bool cmp_not_equal(T t, U u) noexcept;
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```
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*Effects:* Equivalent to: `return !cmp_equal(t, u);`
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``` cpp
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+
template<class T, class U>
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constexpr bool cmp_less(T t, U u) noexcept;
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```
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*Mandates:* Both `T` and `U` are standard integer types or extended
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integer types [[basic.fundamental]].
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*Effects:* Equivalent to:
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| 40 |
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| 41 |
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``` cpp
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using UT = make_unsigned_t<T>;
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using UU = make_unsigned_t<U>;
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if constexpr (is_signed_v<T> == is_signed_v<U>)
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return t < u;
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else if constexpr (is_signed_v<T>)
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return t < 0 ? true : UT(t) < u;
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else
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return u < 0 ? false : t < UU(u);
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```
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``` cpp
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template<class T, class U>
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constexpr bool cmp_greater(T t, U u) noexcept;
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```
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*Effects:* Equivalent to: `return cmp_less(u, t);`
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``` cpp
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template<class T, class U>
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constexpr bool cmp_less_equal(T t, U u) noexcept;
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```
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*Effects:* Equivalent to: `return !cmp_greater(t, u);`
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``` cpp
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template<class T, class U>
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constexpr bool cmp_greater_equal(T t, U u) noexcept;
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```
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*Effects:* Equivalent to: `return !cmp_less(t, u);`
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``` cpp
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template<class R, class T>
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constexpr bool in_range(T t) noexcept;
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```
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*Mandates:* Both `T` and `R` are standard integer types or extended
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integer types [[basic.fundamental]].
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*Effects:* Equivalent to:
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``` cpp
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return cmp_greater_equal(t, numeric_limits<R>::min()) &&
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| 85 |
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cmp_less_equal(t, numeric_limits<R>::max());
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```
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[*Note 1*: These function templates cannot be used to compare `byte`,
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| 89 |
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`char`, `char8_t`, `char16_t`, `char32_t`, `wchar_t`, and
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`bool`. — *end note*]
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