[GN]: Precompiled header support for GCC.

tools/gn/substitution_type.h

 // 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.
 
 #ifndef TOOLS_GN_SUBSTITUTION_TYPE_H_
 #define TOOLS_GN_SUBSTITUTION_TYPE_H_
 
 #include <vector>
 
 class Err;
@@ skipping 51 matching lines @@
 
 // An array of size SUBSTITUTION_NUM_TYPES that lists the names of the
 // substitution patterns, including the curly braces. So, for example,
 // kSubstitutionNames[SUBSTITUTION_SOURCE] == "{{source}}".
 extern const char* kSubstitutionNames[SUBSTITUTION_NUM_TYPES];
 
 // Ninja variables corresponding to each substitution. These do not include
 // the dollar sign.
 extern const char* kSubstitutionNinjaNames[SUBSTITUTION_NUM_TYPES];
 
-// A wrapper around an array if flags indicating whether a give substitution
+// A wrapper around an array if flags indicating whether a given substitution
 // type is required in some context. By convention, the LITERAL type bit is
 // not set.
 struct SubstitutionBits {
   SubstitutionBits();
 
   // Merges any bits set in the given "other" to this one. This object will
   // then be the union of all bits in the two lists.
   void MergeFrom(const SubstitutionBits& other);
 
   // Converts the substitution type bitfield (with a true set for each required
@@ skipping 19 matching lines @@
 bool IsValidCopySubstitution(SubstitutionType type);
 
 // Like the "IsValid..." version above but checks a list of types and sets a
 // an error blaming the given source if the test fails.
 bool EnsureValidSourcesSubstitutions(
     const std::vector<SubstitutionType>& types,
     const ParseNode* origin,
     Err* err);
 
 #endif  // TOOLS_GN_SUBSTITUTION_TYPE_H_