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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string_view>
#include "gn/label.h"
#include "gn/source_dir.h"
class Err;
class Value;
extern const char kLabelPattern_Help[];
// A label pattern is a simple pattern that matches labels. It is used for
// specifying visibility and other times when multiple targets need to be
// referenced.
class LabelPattern {
enum Type {
MATCH = 1, // Exact match for a given target.
DIRECTORY, // Only targets in the file in the given directory.
RECURSIVE_DIRECTORY // The given directory and any subdir.
// (also indicates "public" when dir is empty).
LabelPattern(Type type,
const SourceDir& dir,
const std::string_view& name,
const Label& toolchain_label);
LabelPattern(const LabelPattern& other);
// Converts the given input string to a pattern. This does special stuff
// to treat the pattern as a label. Sets the error on failure.
static LabelPattern GetPattern(const SourceDir& current_dir,
const std::string_view& source_root,
const Value& value,
Err* err);
// Returns true if the given input string might match more than one thing.
static bool HasWildcard(const std::string& str);
// Returns true if this pattern matches the given label.
bool Matches(const Label& label) const;
// Returns true if any of the patterns in the vector match the label.
static bool VectorMatches(const std::vector<LabelPattern>& patterns,
const Label& label);
// Returns a string representation of this pattern.
std::string Describe() const;
Type type() const { return type_; }
const SourceDir& dir() const { return dir_; }
const std::string& name() const { return name_; }
const Label& toolchain() const { return toolchain_; }
void set_toolchain(const Label& tc) { toolchain_ = tc; }
// If nonempty, specifies the toolchain to use. If empty, this will match
// all toolchains. This is independent of the match type.
Label toolchain_;
Type type_;
// Used when type_ == PRIVATE and PRIVATE_RECURSIVE. This specifies the
// directory that to which the pattern is private to.
SourceDir dir_;
// Empty name means match everything. Otherwise the name must match
// exactly.
std::string name_;