Return whether the operands have the same value.
Synopsis
Declared in <bslstl_optional.h>
template<
class t_LHS_TYPE,
class t_RHS_TYPE>
constexpr
bool
operator==(
std::optional<t_LHS_TYPE> const& lhs,
bsl::optional<t_RHS_TYPE> const& rhs);Description
Return true if the specified lhs and rhs optional objects have the same value, and false otherwise. Two optional objects have the same value if both are disengaged, or if both are engaged and the values of their underlying objects compare equal. Note that this function will fail to compile if t_LHS_TYPE and t_RHS_TYPE are not compatible. These functions can be called in constant expressions only if the bsl::optional's value type is not allocator‐aware.
Return Value
true if lhs and rhs have the same value, and false otherwise
Parameters
Name |
Description |
lhs |
left‐hand operand |
rhs |
right‐hand operand |
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