llvm-project.git/libcxx/test/support/test.support/make_string_header.pass.cpp, branch main

[libc++][RFC] Always define internal feature test macros (#89178)

2024-10-12T07:49:52+00:00

Currently, the library-internal feature test macros are only defined if
the feature is not available, and always have the prefix
`_LIBCPP_HAS_NO_`. This patch changes that, so that they are always
defined and have the prefix `_LIBCPP_HAS_` instead. This changes the
canonical use of these macros to `#if _LIBCPP_HAS_FEATURE`, which means
that using an undefined macro (e.g. due to a missing include) is
diagnosed now. While this is rather unlikely currently, a similar change
in `<__configuration/availability.h>` caught a few bugs. This also
improves readability, since it removes the double-negation of `#ifndef
_LIBCPP_HAS_NO_FEATURE`.

The current patch only touches the macros defined in `<__config>`. If
people are happy with this approach, I'll make a follow-up PR to also
change the macros defined in `<__config_site>`.

[libc++][NFC] Add missing license headers

2024-07-31T16:58:09+00:00

Also standardize the license comment in several files where it was
different from what we normally do.

[libc++] Remove macros for IBM compiler

2022-06-14T13:15:41+00:00

It's not tested or used anymore -- instead a Clang-based compiler is
used on IBM nowadays.

Differential Revision: https://reviews.llvm.org/D127650

[runtimes] Rename various libcpp-has-no-XYZ Lit features to just no-XYZ

2022-05-27T19:24:45+00:00

Since those features are general properties of the environment, it makes
sense to use them from libc++abi too, and so the name libcpp-has-no-xxx
doesn't make sense.

Differential Revision: https://reviews.llvm.org/D126482

[libc++][nfc] Add TEST_HAS_NO_UNICODE_CHARS.

2022-02-03T07:02:25+00:00

This avoids using an libc++ internal macro in our tests.

Reviewed By: #libc, philnik, ldionne

Differential Revision: https://reviews.llvm.org/D118832

[libc++] Add an option to disable wide character support in libc++

2021-10-12T10:08:23+00:00

Some embedded platforms do not wish to support the C library functionality
for handling wchar_t because they have no use for it. It makes sense for
libc++ to work properly on those platforms, so this commit adds a carve-out
of functionality for wchar_t.

Unfortunately, unlike some other carve-outs (e.g. random device), this
patch touches several parts of the library. However, despite the wide
impact of this patch, I still think it is important to support this
configuration since it makes it much simpler to port libc++ to some
embedded platforms.

Differential Revision: https://reviews.llvm.org/D111265

[libc++] s/_LIBCPP_NO_HAS_CHAR8_T/_LIBCPP_HAS_NO_CHAR8_T/g

2021-04-21T16:49:07+00:00

This was raised in D94511.

Differential Revision: https://reviews.llvm.org/D100736

[libc++] Adds a make_string test helper function.

2021-02-04T16:16:44+00:00

These function makes it easier to write generic unit tests for the
format header. It solves the issue where it's not possible to use
  `templated_prefix"foo"`
where `templated_prefix` resolves to: nothing, `L`, `u8`, `u`,
or `U`. The templated_prefix would be more faster during execution.

Reviewed By: ldionne, #libc, curdeius

Differential Revision: https://reviews.llvm.org/D93414