The overloads of `println` are specified in terms of `format`. The
function `format` is specified to work with ranges.
The implementations for `println` do not include `<format>`, but
libc++'s granularized header. This means the following example does not
work
#include <vector>
#include <print>
int main() {
std::vector<int> v{1, 2, 3};
std::println("{}", v);
}
(The other print functions also require this to work, they are specified
in terms of other format functions.)
Fixes: https://github.com/llvm/llvm-project/issues/71925
29 lines
938 B
C++
29 lines
938 B
C++
//===----------------------------------------------------------------------===//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
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// UNSUPPORTED: no-filesystem
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// UNSUPPORTED: GCC-ALWAYS_INLINE-FIXME
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// XFAIL: availability-fp_to_chars-missing
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// <print>
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// The Standard does indirectly require that <print> includes <format>. However
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// using the granularized headers so it's possible to implement <print> without
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// <format>. This would be a non-conforming implementation.
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//
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// See https://github.com/llvm/llvm-project/issues/71925
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#include <print>
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#include <vector>
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void test() {
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std::vector<int> v{1, 2, 3};
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std::print("{} {}", 42, v);
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}
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