mirror of
https://github.com/MaskRay/ccls.git
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142 lines
4.4 KiB
C++
142 lines
4.4 KiB
C++
/* Copyright 2017-2018 ccls Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#pragma once
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#include <optional>
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#include <string_view>
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#include <iterator>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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namespace llvm {
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class StringRef;
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}
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namespace ccls {
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struct Matcher {
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struct Impl;
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std::unique_ptr<Impl> impl;
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std::string pattern;
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Matcher(const std::string &pattern); // throw
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Matcher(Matcher&&) = default;
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~Matcher();
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bool Matches(const std::string &text) const;
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};
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struct GroupMatch {
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std::vector<Matcher> whitelist, blacklist;
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GroupMatch(const std::vector<std::string> &whitelist,
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const std::vector<std::string> &blacklist);
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bool Matches(const std::string &text,
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std::string *blacklist_pattern = nullptr) const;
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};
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uint64_t HashUsr(llvm::StringRef s);
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std::string LowerPathIfInsensitive(const std::string &path);
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// Ensures that |path| ends in a slash.
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void EnsureEndsInSlash(std::string &path);
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// Converts a file path to one that can be used as filename.
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// e.g. foo/bar.c => foo_bar.c
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std::string EscapeFileName(std::string path);
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std::string ResolveIfRelative(const std::string &directory,
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const std::string &path);
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std::optional<int64_t> LastWriteTime(const std::string &path);
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std::optional<std::string> ReadContent(const std::string &filename);
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void WriteToFile(const std::string &filename, const std::string &content);
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int ReverseSubseqMatch(std::string_view pat, std::string_view text,
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int case_sensitivity);
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// http://stackoverflow.com/a/38140932
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//
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// struct SomeHashKey {
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// std::string key1;
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// std::string key2;
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// bool key3;
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// };
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// MAKE_HASHABLE(SomeHashKey, t.key1, t.key2, t.key3)
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inline void hash_combine(std::size_t &seed) {}
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template <typename T, typename... Rest>
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inline void hash_combine(std::size_t &seed, const T &v, Rest... rest) {
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std::hash<T> hasher;
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seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
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hash_combine(seed, rest...);
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}
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#define MAKE_HASHABLE(type, ...) \
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namespace std { \
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template <> struct hash<type> { \
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std::size_t operator()(const type &t) const { \
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std::size_t ret = 0; \
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ccls::hash_combine(ret, __VA_ARGS__); \
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return ret; \
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} \
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}; \
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}
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std::string GetDefaultResourceDirectory();
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// Like std::optional, but the stored data is responsible for containing the
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// empty state. T should define a function `bool T::Valid()`.
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template <typename T> class Maybe {
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T storage;
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public:
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constexpr Maybe() = default;
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Maybe(const Maybe &) = default;
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Maybe(std::nullopt_t) {}
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Maybe(const T &x) : storage(x) {}
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Maybe(T &&x) : storage(std::forward<T>(x)) {}
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Maybe &operator=(const Maybe &) = default;
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Maybe &operator=(const T &x) {
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storage = x;
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return *this;
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}
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const T *operator->() const { return &storage; }
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T *operator->() { return &storage; }
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const T &operator*() const { return storage; }
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T &operator*() { return storage; }
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bool Valid() const { return storage.Valid(); }
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explicit operator bool() const { return Valid(); }
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operator std::optional<T>() const {
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if (Valid())
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return storage;
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return std::nullopt;
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}
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void operator=(std::optional<T> &&o) { storage = o ? *o : T(); }
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// Does not test if has_value()
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bool operator==(const Maybe &o) const { return storage == o.storage; }
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bool operator!=(const Maybe &o) const { return !(*this == o); }
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};
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} // namespace ccls
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