OLD | NEW |
1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "tools/gn/template.h" | 5 #include "tools/gn/template.h" |
6 | 6 |
7 #include <utility> | 7 #include <utility> |
8 | 8 |
9 #include "tools/gn/err.h" | 9 #include "tools/gn/err.h" |
10 #include "tools/gn/functions.h" | 10 #include "tools/gn/functions.h" |
(...skipping 62 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
73 | 73 |
74 // We jump through some hoops to avoid copying the invocation scope when | 74 // We jump through some hoops to avoid copying the invocation scope when |
75 // setting it in the template scope (since the invocation scope may have | 75 // setting it in the template scope (since the invocation scope may have |
76 // large lists of source files in it and could be expensive to copy). | 76 // large lists of source files in it and could be expensive to copy). |
77 // | 77 // |
78 // Scope.SetValue will copy the value which will in turn copy the scope, but | 78 // Scope.SetValue will copy the value which will in turn copy the scope, but |
79 // if we instead create a value and then set the scope on it, the copy can | 79 // if we instead create a value and then set the scope on it, the copy can |
80 // be avoided. | 80 // be avoided. |
81 template_scope.SetValue(variables::kInvoker, | 81 template_scope.SetValue(variables::kInvoker, |
82 Value(nullptr, std::unique_ptr<Scope>()), invocation); | 82 Value(nullptr, std::unique_ptr<Scope>()), invocation); |
83 Value* invoker_value = | 83 Value* invoker_value = template_scope.GetMutableValue( |
84 template_scope.GetMutableValue(variables::kInvoker, false); | 84 variables::kInvoker, Scope::SEARCH_NESTED, false); |
85 invoker_value->SetScopeValue(std::move(invocation_scope)); | 85 invoker_value->SetScopeValue(std::move(invocation_scope)); |
86 template_scope.set_source_dir(scope->GetSourceDir()); | 86 template_scope.set_source_dir(scope->GetSourceDir()); |
87 | 87 |
88 const base::StringPiece target_name(variables::kTargetName); | 88 const base::StringPiece target_name(variables::kTargetName); |
89 template_scope.SetValue(target_name, | 89 template_scope.SetValue(target_name, |
90 Value(invocation, args[0].string_value()), | 90 Value(invocation, args[0].string_value()), |
91 invocation); | 91 invocation); |
92 | 92 |
93 // Actually run the template code. | 93 // Actually run the template code. |
94 Value result = | 94 Value result = |
95 definition_->block()->Execute(&template_scope, err); | 95 definition_->block()->Execute(&template_scope, err); |
96 if (err->has_error()) { | 96 if (err->has_error()) { |
97 // If there was an error, append the caller location so the error message | 97 // If there was an error, append the caller location so the error message |
98 // displays a stack trace of how it got here. | 98 // displays a stack trace of how it got here. |
99 err->AppendSubErr(Err(invocation, "whence it was called.")); | 99 err->AppendSubErr(Err(invocation, "whence it was called.")); |
100 return Value(); | 100 return Value(); |
101 } | 101 } |
102 | 102 |
103 // Check for unused variables in the invocation scope. This will find typos | 103 // Check for unused variables in the invocation scope. This will find typos |
104 // of things the caller meant to pass to the template but the template didn't | 104 // of things the caller meant to pass to the template but the template didn't |
105 // read out. | 105 // read out. |
106 // | 106 // |
107 // This is a bit tricky because it's theoretically possible for the template | 107 // This is a bit tricky because it's theoretically possible for the template |
108 // to overwrite the value of "invoker" and free the Scope owned by the | 108 // to overwrite the value of "invoker" and free the Scope owned by the |
109 // value. So we need to look it up again and don't do anything if it doesn't | 109 // value. So we need to look it up again and don't do anything if it doesn't |
110 // exist. | 110 // exist. |
111 invoker_value = template_scope.GetMutableValue(variables::kInvoker, false); | 111 invoker_value = template_scope.GetMutableValue( |
| 112 variables::kInvoker, Scope::SEARCH_NESTED, false); |
112 if (invoker_value && invoker_value->type() == Value::SCOPE) { | 113 if (invoker_value && invoker_value->type() == Value::SCOPE) { |
113 if (!invoker_value->scope_value()->CheckForUnusedVars(err)) | 114 if (!invoker_value->scope_value()->CheckForUnusedVars(err)) |
114 return Value(); | 115 return Value(); |
115 } | 116 } |
116 | 117 |
117 // Check for unused variables in the template itself. | 118 // Check for unused variables in the template itself. |
118 if (!template_scope.CheckForUnusedVars(err)) | 119 if (!template_scope.CheckForUnusedVars(err)) |
119 return Value(); | 120 return Value(); |
120 | 121 |
121 return result; | 122 return result; |
122 } | 123 } |
123 | 124 |
124 LocationRange Template::GetDefinitionRange() const { | 125 LocationRange Template::GetDefinitionRange() const { |
125 return definition_->GetRange(); | 126 return definition_->GetRange(); |
126 } | 127 } |
OLD | NEW |