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libstdc++
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Macros | |
| #define | __glibcxx_want_constrained_equality |
| #define | __glibcxx_want_freestanding_optional |
| #define | __glibcxx_want_optional |
| #define | __glibcxx_want_optional_range_support |
| #define | _GLIBCXX_OPTIONAL |
This is a Standard C++ Library header.
Definition in file optional.