fish-shell/src/parser_keywords.cpp

// Functions having to do with parser keywords, like testing if a function is a block command.
#include "config.h"  // IWYU pragma: keep

#include <string>

#include "common.h"
#include "fallback.h"  // IWYU pragma: keep
#include "parser_keywords.h"

bool parser_keywords_skip_arguments(const wcstring &cmd) {
    return cmd == L"else" || cmd == L"begin";
}

static const wcstring_list_t subcommand_keywords({L"command", L"builtin", L"while", L"exec", L"if",
                                                  L"and", L"or", L"not"});
bool parser_keywords_is_subcommand(const wcstring &cmd) {
    return parser_keywords_skip_arguments(cmd) || contains(subcommand_keywords, cmd);
}

static const wcstring_list_t block_keywords({L"for", L"while", L"if", L"function", L"switch",
                                             L"begin"});
bool parser_keywords_is_block(const wcstring &word) { return contains(block_keywords, word); }

static const wcstring_list_t reserved_keywords({L"end", L"case", L"else", L"return", L"continue",
                                                L"break", L"argparse", L"read", L"set", L"status", L"test", L"["});
bool parser_keywords_is_reserved(const wcstring &word) {
    return parser_keywords_is_block(word) || parser_keywords_is_subcommand(word) ||
           contains(reserved_keywords, word);
}