Initial commit
diff --git a/src/ast/module.cc b/src/ast/module.cc
new file mode 100644
index 0000000..e5c5015
--- /dev/null
+++ b/src/ast/module.cc
@@ -0,0 +1,61 @@
+// Copyright 2020 The Tint Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "src/ast/module.h"
+
+#include <sstream>
+
+namespace tint {
+namespace ast {
+
+const Import* Module::FindImportByName(const std::string& name) {
+ for (const auto& import : imports_) {
+ if (import->name() == name)
+ return import.get();
+ }
+ return nullptr;
+}
+
+bool Module::IsValid() const {
+ for (const auto& import : imports_) {
+ if (!import->IsValid())
+ return false;
+ }
+ return true;
+}
+
+std::string Module::to_str() const {
+ std::ostringstream out;
+
+ for (const auto& import : imports_) {
+ import->to_str(out, 0);
+ }
+ for (const auto& var : global_variables_) {
+ var->to_str(out, 0);
+ }
+ for (const auto& ep : entry_points_) {
+ ep->to_str(out, 0);
+ }
+ for (const auto& alias : alias_types_) {
+ out << alias->name() << " -> " << alias->type()->type_name() << std::endl;
+ }
+ for (const auto& func : functions_) {
+ func->to_str(out, 0);
+ }
+
+ return out.str();
+}
+
+} // namespace ast
+} // namespace tint
