config_values_extractors.h revision 3551c9c881056c480085172ff9840cab31610854 
1// Copyright (c) 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef TOOLS_GN_CONFIG_VALUES_EXTRACTORS_H_
6#define TOOLS_GN_CONFIG_VALUES_EXTRACTORS_H_
7
8#include <ostream>
9#include <string>
10#include <vector>
11
12#include "tools/gn/config.h"
13#include "tools/gn/config_values.h"
14#include "tools/gn/target.h"
15
16struct EscapeOptions;
17
18template<typename T, class Writer>
19inline void ConfigValuesToStream(
20    const ConfigValues& values,
21    const std::vector<T>& (ConfigValues::* getter)() const,
22    const Writer& writer,
23    std::ostream& out) {
24  const std::vector<T>& v = (values.*getter)();
25  for (size_t i = 0; i < v.size(); i++)
26    writer(v[i], out);
27};
28
29// Writes a given config value that applies to a given target. This collects
30// all values from the target itself and all configs that apply, and writes
31// then in order.
32template<typename T, class Writer>
33inline void RecursiveTargetConfigToStream(
34    const Target* target,
35    const std::vector<T>& (ConfigValues::* getter)() const,
36    const Writer& writer,
37    std::ostream& out) {
38  // Note: if you make any changes to this, also change the writer in the
39  // implementation of the "desc" command.
40
41  // First write the values from the config itself.
42  ConfigValuesToStream(target->config_values(), getter, writer, out);
43
44  // Then write the configs in order.
45  for (size_t i = 0; i < target->configs().size(); i++) {
46    ConfigValuesToStream(target->configs()[i]->config_values(), getter,
47                         writer, out);
48  }
49}
50
51// Writes the values out as strings with no transformation.
52void RecursiveTargetConfigStringsToStream(
53    const Target* target,
54    const std::vector<std::string>& (ConfigValues::* getter)() const,
55    const EscapeOptions& escape_options,
56    std::ostream& out);
57
58#endif  // TOOLS_GN_CONFIG_VALUES_EXTRACTORS_H_
59