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xo-object: spaceship operator for gp<T> + gp<String>

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This commit is contained in:
Roland Conybeare 2025-12-06 14:16:34 -05:00
commit c6876ed31a
2 changed files with 31 additions and 0 deletions
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12
xo-allocutil/include/xo/allocutil/gc_ptr.hpp
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@ -69,6 +69,18 @@ namespace xo {
T * operator->() const { return ptr_; }
T & operator*() const { return *ptr_; }
auto operator<=>(gc_ptr<T> other) const
requires std::three_way_comparable<T>
{
return *ptr_ <=> *other.ptr_;
}
bool operator==(gc_ptr<T> other) const
requires std::equality_comparable<T>
{
return *ptr_ == *other.ptr_;
}
private:
T * ptr_ = nullptr;
};

19
xo-object/include/xo/object/String.hpp
View file

@ -77,6 +77,24 @@ namespace xo {
**/
std::size_t columns() const;
std::strong_ordering operator<=>(const String & other) const {
size_t len1 = std::strlen(chars_);
size_t len2 = std::strlen(other.chars_);
return std::lexicographical_compare_three_way(chars_, chars_ + len1,
other.chars_, other.chars_ + len2);
}
bool operator==(const String & other) const {
size_t len1 = std::strlen(chars_);
size_t len2 = std::strlen(other.chars_);
if (len1 != len2)
return false;
return std::memcmp(chars_, other.chars_, len1) == 0;
}
// inherited from Object..
virtual TaggedPtr self_tp() const final override;
virtual void display(std::ostream & os) const final override;
@ -128,6 +146,7 @@ namespace xo {
template <>
struct ObjectConversion<std::string> : public ObjectConversion_String {};
} /*namespace obj*/
} /*namespace xo*/