| 114 | } |
| 115 | |
| 116 | void ArgumentParser::SubCommandDescriptor::usage( |
| 117 | std::FILE *Out) const noexcept { |
| 118 | fmt::print(Out, "{}USAGE{}\n"sv, YELLOW_COLOR, RESET_COLOR); |
| 119 | for (const char *Part : ProgramNames) { |
| 120 | fmt::print(Out, "\t{}"sv, Part); |
| 121 | } |
| 122 | if (!SubCommandList.empty()) { |
| 123 | fmt::print(Out, " [SUBCOMMANDS]"sv); |
| 124 | } |
| 125 | if (!NonpositionalList.empty()) { |
| 126 | fmt::print(Out, " [OPTIONS]"sv); |
| 127 | } |
| 128 | bool First = true; |
| 129 | for (const auto &Index : PositionalList) { |
| 130 | const auto &Desc = ArgumentDescriptors[Index]; |
| 131 | if (Desc.hidden()) { |
| 132 | continue; |
| 133 | } |
| 134 | |
| 135 | if (First) { |
| 136 | fmt::print(Out, " [--]"sv); |
| 137 | First = false; |
| 138 | } |
| 139 | |
| 140 | const bool Optional = (Desc.min_nargs() == 0); |
| 141 | fmt::print(Out, " "sv); |
| 142 | if (Optional) { |
| 143 | fmt::print(Out, "["sv); |
| 144 | } |
| 145 | switch (ArgumentDescriptors[Index].max_nargs()) { |
| 146 | case 0: |
| 147 | break; |
| 148 | case 1: |
| 149 | fmt::print(Out, "{}"sv, Desc.meta()); |
| 150 | break; |
| 151 | default: |
| 152 | fmt::print(Out, "{} ..."sv, Desc.meta()); |
| 153 | break; |
| 154 | } |
| 155 | if (Optional) { |
| 156 | fmt::print(Out, "]"sv); |
| 157 | } |
| 158 | } |
| 159 | fmt::print(Out, "\n"sv); |
| 160 | } |
| 161 | |
| 162 | void ArgumentParser::SubCommandDescriptor::help(std::FILE *Out) const noexcept { |
| 163 | // For enabling Windows PowerShell color support. |