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https://github.com/fish-shell/fish-shell
synced 2025-01-23 02:05:07 +00:00
cb3ab80cab
This may slightly improve performance by allowing the compiler greater visibility into what is happing on top of not executing at runtime in some hot paths, but more importantly, it gets rid of magic constants in a few different places.
60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
#include "config.h" // IWYU pragma: keep
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#include "future_feature_flags.h"
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#include <cwchar>
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#include "wcstringutil.h"
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features_t::features_t() = default;
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/// The set of features applying to this instance.
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features_t features_t::global_features;
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const features_t::metadata_t features_t::metadata[features_t::flag_count] = {
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{stderr_nocaret, L"stderr-nocaret", L"3.0", L"^ no longer redirects stderr"},
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{qmark_noglob, L"qmark-noglob", L"3.0", L"? no longer globs"},
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{string_replace_backslash, L"regex-easyesc", L"3.1", L"string replace -r needs fewer \\'s"},
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};
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const struct features_t::metadata_t *features_t::metadata_for(const wchar_t *name) {
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assert(name && "null flag name");
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for (const auto &md : metadata) {
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if (!std::wcscmp(name, md.name)) return &md;
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}
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return nullptr;
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}
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void features_t::set_from_string(const wcstring &str) {
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wcstring_list_t entries = split_string(str, L',');
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const wchar_t *whitespace = L"\t\n\v\f\r ";
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for (wcstring entry : entries) {
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if (entry.empty()) continue;
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// Trim leading and trailing whitespace
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entry.erase(0, entry.find_first_not_of(whitespace));
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entry.erase(entry.find_last_not_of(whitespace) + 1);
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const wchar_t *name = entry.c_str();
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bool value = true;
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// A "no-" prefix inverts the sense.
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if (string_prefixes_string(L"no-", name)) {
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value = false;
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name += const_strlen("no-");
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}
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// Look for a feature with this name. If we don't find it, assume it's a group name and set
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// all features whose group contain it. Do nothing even if the string is unrecognized; this
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// is to allow uniform invocations of fish (e.g. disable a feature that is only present in
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// future versions).
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// The special name 'all' may be used for those who like to live on the edge.
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if (const metadata_t *md = metadata_for(name)) {
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this->set(md->flag, value);
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} else {
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for (const metadata_t &md : metadata) {
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if (std::wcsstr(md.groups, name) || !std::wcscmp(name, L"all")) {
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this->set(md.flag, value);
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}
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}
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}
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}
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}
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