The following macro BSLSTL_OPTIONAL_USES_STD_ALIASES controls whether platform standard library is used as a basis for bsl types in the following ways: ‐ bsl::nullopt is an alias to std::nullopt

Synopsis

Declared in <bslstl_optional.h>

#define BSLSTL_OPTIONAL_USES_STD_ALIASES

Description

  • bsl::optional<T> inherits from std::optional<T> when T is not allocator‐aware.

This macro does not control whether there are conversions and comparisons between std::optional and bsl::optional, that is conditioned only on whether std::optional is available (i.e., BSLS_LIBRARYFEATURES_HAS_CPP17_BASELINE_LIBRARY is defined).

Created with MrDocs