tools/gn/value_extractors.h

   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_VALUE_EXTRACTORS_H_
   6 #define TOOLS_GN_VALUE_EXTRACTORS_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "tools/gn/target.h"
  12 #include "tools/gn/value.h"
  13
  14 class BuildSettings;
  15 class Err;
  16 class Label;
  17 class SourceDir;
  18 class SourceFile;
  19
  20 // Sets the error and returns false on failure.
  21 template<typename T, class Converter>
  22 bool ListValueExtractor(const Value& value, std::vector<T>* dest,
  23                         Err* err,
  24                         const Converter& converter) {
  25   if (!value.VerifyTypeIs(Value::LIST, err))
  26     return false;
  27   const std::vector<Value>& input_list = value.list_value();
  28   dest->resize(input_list.size());
  29   for (size_t i = 0; i < input_list.size(); i++) {
  30     if (!converter(input_list[i], &(*dest)[i], err))
  31       return false;
  32   }
  33   return true;
  34 }
  35
  36 // On failure, returns false and sets the error.
  37 bool ExtractListOfStringValues(const Value& value,
  38                                std::vector<std::string>* dest,
  39                                Err* err);
  40
  41 // Looks for a list of source files relative to a given current dir.
  42 bool ExtractListOfRelativeFiles(const BuildSettings* build_settings,
  43                                 const Value& value,
  44                                 const SourceDir& current_dir,
  45                                 std::vector<SourceFile>* files,
  46                                 Err* err);
  47
  48 // Looks for a list of source directories relative to a given current dir.
  49 bool ExtractListOfRelativeDirs(const BuildSettings* build_settings,
  50                                const Value& value,
  51                                const SourceDir& current_dir,
  52                                std::vector<SourceDir>* dest,
  53                                Err* err);
  54
  55 // Extracts the list of labels and their origins to the given vector. Only the
  56 // labels are filled in, the ptr for each pair in the vector will be null.
  57 bool ExtractListOfLabels(const Value& value,
  58                          const SourceDir& current_dir,
  59                          const Label& current_toolchain,
  60                          LabelConfigVector* dest,
  61                          Err* err);
  62 bool ExtractListOfLabels(const Value& value,
  63                          const SourceDir& current_dir,
  64                          const Label& current_toolchain,
  65                          LabelTargetVector* dest,
  66                          Err* err);
  67
  68 #endif  // TOOLS_GN_VALUE_EXTRACTORS_H_