// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#ifndef CARBON_TOOLCHAIN_DIAGNOSTICS_FORMAT_PROVIDERS_H_
#define CARBON_TOOLCHAIN_DIAGNOSTICS_FORMAT_PROVIDERS_H_
#include "common/ostream.h"
#include "llvm/Support/FormatVariadicDetails.h"
namespace Carbon::Diagnostics {
// Selects a formatv string based on the value.
//
// Supported format styles are:
// - None, as in `{0}`. This uses standard integer formatting.
// - Selector, as in `{0:true|false}`. The output string used is separated by a
// `|`, with the true case first. the example would yield standard bool
// formatting.
struct BoolAsSelect {
 explicit(false) BoolAsSelect(bool value) : value(value) {}
 bool value;
};
// Selects a formatv string based on the value.
//
// Supported format styles are:
// - None, as in `{0}`. This uses standard integer formatting.
// - Selector, as in `{0:=0:zero|:default}`. This is detailed below.
// - Plural `s`, as in `{0:s}`. This outputs an `s` when the value is not 1,
// equivalent to `{0:=1:|:s}`.
//
// The style is a series of match cases, separated by `|`. Each case is a pair
// formatted as `<selector>:<output string>`.
//
// Supported selectors are:
// - `=<value>`: Matches when the value is correct.
// - Empty for the default. This is optional, although it's a fatal error to not
// handle a value. If provided, it must be last.
//
// For example, `{0:=0:zero&#124;=1:one&#124;:other}` breaks down into:
// - `=0` -> `zero`
// - `=1` -> `one`
// - default -> `other`
//
// As another example, `{0:=1:is&#124;:are}` is a way to handle plural-based output.
struct IntAsSelect {
 explicit(false) IntAsSelect(int value) : value(value) {}
 int value;
};
} // namespace Carbon::Diagnostics
// See Diagnostics::BoolAsSelect.
template <strong>
struct llvm::format_provider<carbon::diagnostics::boolasselect> {
 static auto format(const Carbon::Diagnostics::BoolAsSelect& wrapper,
 raw_ostream& out, StringRef style) -> void;
};
// See Diagnostics::IntAsSelect.
template <strong>
struct llvm::format_provider<carbon::diagnostics::intasselect> {
 static auto format(const Carbon::Diagnostics::IntAsSelect& wrapper,
 raw_ostream& out, StringRef style) -> void;
};
#endif // CARBON_TOOLCHAIN_DIAGNOSTICS_FORMAT_PROVIDERS_H_
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="http://docs.carbon-lang.dev/toolchain/diagnostics/format_providers.h">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="http://docs.carbon-lang.dev/toolchain/diagnostics/format_providers.h" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>