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/*
* 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
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