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Pass heavy arguments by ref

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This commit is contained in:
Victor Zverovich 2018-08-31 14:42:45 -07:00
parent 8dc69b9da9
commit fbc38b9083
2 changed files with 6 additions and 5 deletions
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2
include/fmt/core.h
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@ -720,7 +720,7 @@ class basic_format_arg {
template <typename Visitor, typename Ctx>
friend FMT_CONSTEXPR typename internal::result_of<Visitor(int)>::type
visit(Visitor &&vis, basic_format_arg<Ctx> arg);
visit(Visitor &&vis, const basic_format_arg<Ctx> &arg);
friend class basic_format_args<Context>;
friend class internal::arg_map<Context>;

9
include/fmt/format.h
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@ -1165,7 +1165,7 @@ struct monostate {};
*/
template <typename Visitor, typename Context>
FMT_CONSTEXPR typename internal::result_of<Visitor(int)>::type
visit(Visitor &&vis, basic_format_arg<Context> arg) {
visit(Visitor &&vis, const basic_format_arg<Context> &arg) {
typedef typename Context::char_type char_type;
switch (arg.type_) {
case internal::none_type:
@ -2405,7 +2405,7 @@ class basic_writer {
// <left-padding><value><right-padding>
// where <value> is written by f(it).
template <typename F>
void write_padded(std::size_t size, const align_spec &spec, F f);
void write_padded(std::size_t size, const align_spec &spec, F &&f);
template <typename F>
struct padded_int_writer {
@ -2755,7 +2755,7 @@ class basic_writer {
template <typename Range>
template <typename F>
void basic_writer<Range>::write_padded(
std::size_t size, const align_spec &spec, F f) {
std::size_t size, const align_spec &spec, F &&f) {
unsigned width = spec.width();
if (width <= size)
return f(reserve(size));
@ -3250,7 +3250,8 @@ class dynamic_formatter {
template <typename Range, typename Char>
typename basic_format_context<Range, Char>::format_arg
basic_format_context<Range, Char>::get_arg(basic_string_view<char_type> name) {
basic_format_context<Range, Char>::get_arg(
basic_string_view<char_type> name) {
map_.init(this->args());
format_arg arg = map_.find(name);
if (arg.type() == internal::none_type)