add missing file

src/parser/wat-parser-internal.h

@@ -0,0 +1,97 @@
+/*
+ * Copyright 2024 WebAssembly Community Group participants
+ *
+ * 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 "contexts.h"
+#include "parsers.h"
+
+#ifndef parser_wat_parser_internal_h
+#define parser_wat_parser_internal_h
+
+namespace wasm::WATParser {
+
+Result<> parseDecls(ParseDeclsCtx& decls);
+
+Result<> parseTypeDefs(
+  ParseDeclsCtx& decls,
+  Lexer& input,
+  IndexMap& typeIndices,
+  std::vector<HeapType>& types,
+  std::unordered_map<HeapType, std::unordered_map<Name, Index>>& typeNames);
+
+Result<>
+parseImplicitTypeDefs(ParseDeclsCtx& decls,
+                      Lexer& input,
+                      IndexMap& typeIndices,
+                      std::vector<HeapType>& types,
+                      std::unordered_map<Index, HeapType>& implicitTypes);
+
+Result<> parseModuleTypes(ParseDeclsCtx& decls,
+                          Lexer& input,
+                          IndexMap& typeIndices,
+                          std::vector<HeapType>& types,
+                          std::unordered_map<Index, HeapType>& implicitTypes);
+
+Result<> parseDefinitions(
+  ParseDeclsCtx& decls,
+  Lexer& input,
+  IndexMap& typeIndices,
+  std::vector<HeapType>& types,
+  std::unordered_map<Index, HeapType>& implicitTypes,
+  std::unordered_map<HeapType, std::unordered_map<Name, Index>>& typeNames);
+
+// RAII utility for temporarily changing the parsing position of a parsing
+// context.
+template<typename Ctx> struct WithPosition {
+  Ctx& ctx;
+  Index original;
+  std::vector<Annotation> annotations;
+
+  WithPosition(Ctx& ctx, Index pos)
+    : ctx(ctx), original(ctx.in.getPos()),
+      annotations(ctx.in.takeAnnotations()) {
+    ctx.in.setPos(pos);
+  }
+
+  ~WithPosition() {
+    ctx.in.setPos(original);
+    ctx.in.setAnnotations(std::move(annotations));
+  }
+};
+
+template<typename Ctx>
+Result<> parseDefs(Ctx& ctx,
+                   const std::vector<DefPos>& defs,
+                   MaybeResult<> (*parser)(Ctx&)) {
+  for (auto& def : defs) {
+    ctx.index = def.index;
+    WithPosition with(ctx, def.pos);
+    if (auto parsed = parser(ctx)) {
+      CHECK_ERR(parsed);
+    } else {
+      auto im = import_(ctx);
+      assert(im);
+      CHECK_ERR(im);
+    }
+  }
+  return Ok{};
+}
+
+// Deduction guide to satisfy -Wctad-maybe-unsupported.
+template<typename Ctx> WithPosition(Ctx& ctx, Index) -> WithPosition<Ctx>;
+
+} // namespace wasm::WATParser
+
+#endif // parser_wat_parser_internal_h