External/fmt
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Victor Zverovich 2021-05-11 20:20:03 -07:00
parent 02896dabee
commit 8f0fadfaaa
1 changed files with 3 additions and 6 deletions
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doc/api.rst
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@ -181,14 +181,12 @@ template and implement ``parse`` and ``format`` methods::
struct point { double x, y; }; struct point { double x, y; };
template <> template <> struct fmt::formatter<point> {
struct fmt::formatter<point> {
// Presentation format: 'f' - fixed, 'e' - exponential. // Presentation format: 'f' - fixed, 'e' - exponential.
char presentation = 'f'; char presentation = 'f';
// Parses format specifications of the form ['f' | 'e']. // Parses format specifications of the form ['f' | 'e'].
constexpr auto parse(format_parse_context& ctx) { constexpr auto parse(format_parse_context& ctx) -> decltype(ctx.begin()) {
// auto parse(format_parse_context &ctx) -> decltype(ctx.begin()) // c++11
// [ctx.begin(), ctx.end()) is a character range that contains a part of // [ctx.begin(), ctx.end()) is a character range that contains a part of
// the format string starting from the format specifications to be parsed, // the format string starting from the format specifications to be parsed,
// e.g. in // e.g. in
@ -215,8 +213,7 @@ template and implement ``parse`` and ``format`` methods::
// Formats the point p using the parsed format specification (presentation) // Formats the point p using the parsed format specification (presentation)
// stored in this formatter. // stored in this formatter.
template <typename FormatContext> template <typename FormatContext>
auto format(const point& p, FormatContext& ctx) { auto format(const point& p, FormatContext& ctx) -> decltype(ctx.out()) {
// auto format(const point &p, FormatContext &ctx) -> decltype(ctx.out()) // c++11
// ctx.out() is an output iterator to write to. // ctx.out() is an output iterator to write to.
return format_to( return format_to(
ctx.out(), ctx.out(),