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4100 lines (3659 loc) · 119 KB
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/*
* Copyright 2023 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.
*/
#ifndef parser_parsers_h
#define parser_parsers_h
#include "common.h"
#include "contexts.h"
#include "lexer.h"
#include "wasm.h"
#include "wat-parser-internal.h"
namespace wasm::WATParser {
using namespace std::string_view_literals;
// Types
template<typename Ctx>
Result<typename Ctx::HeapTypeT> absheaptype(Ctx&, Shareability);
template<typename Ctx> Result<typename Ctx::HeapTypeT> heaptype(Ctx&);
template<typename Ctx> MaybeResult<typename Ctx::RefTypeT> maybeReftype(Ctx&);
template<typename Ctx> Result<typename Ctx::RefTypeT> reftype(Ctx&);
template<typename Ctx> MaybeResult<typename Ctx::TypeT> tupletype(Ctx&);
template<typename Ctx> Result<typename Ctx::TypeT> valtype(Ctx&);
template<typename Ctx>
MaybeResult<typename Ctx::ParamsT> params(Ctx&, bool allowNames = true);
template<typename Ctx> MaybeResult<typename Ctx::ResultsT> results(Ctx&);
template<typename Ctx> MaybeResult<typename Ctx::SignatureT> functype(Ctx&);
template<typename Ctx> Result<typename Ctx::FieldT> storagetype(Ctx&);
template<typename Ctx> Result<typename Ctx::FieldT> fieldtype(Ctx&);
template<typename Ctx> Result<typename Ctx::FieldsT> fields(Ctx&);
template<typename Ctx> MaybeResult<typename Ctx::StructT> structtype(Ctx&);
template<typename Ctx> MaybeResult<typename Ctx::ArrayT> arraytype(Ctx&);
template<typename Ctx> Result<typename Ctx::LimitsT> limits32(Ctx&);
template<typename Ctx> Result<typename Ctx::LimitsT> limits64(Ctx&);
template<typename Ctx> Result<typename Ctx::MemTypeT> memtype(Ctx&);
template<typename Ctx>
Result<typename Ctx::MemTypeT> memtypeContinued(Ctx&, Type addressType);
template<typename Ctx> Result<MemoryOrder> memorder(Ctx&);
template<typename Ctx> MaybeResult<MemoryOrder> maybeMemOrder(Ctx&);
template<typename Ctx> Result<typename Ctx::TableTypeT> tabletype(Ctx&);
template<typename Ctx>
Result<typename Ctx::TableTypeT> tabletypeContinued(Ctx&, Type addressType);
template<typename Ctx> Result<typename Ctx::GlobalTypeT> globaltype(Ctx&);
template<typename Ctx> Result<uint32_t> tupleArity(Ctx&);
// Instructions
template<typename Ctx>
MaybeResult<> foldedBlockinstr(Ctx&, const std::vector<Annotation>&);
template<typename Ctx>
MaybeResult<> unfoldedBlockinstr(Ctx&, const std::vector<Annotation>&);
template<typename Ctx>
MaybeResult<> blockinstr(Ctx&, const std::vector<Annotation>&);
template<typename Ctx>
MaybeResult<> plaininstr(Ctx&, const std::vector<Annotation>&);
template<typename Ctx> MaybeResult<> instr(Ctx&);
template<typename Ctx> MaybeResult<> foldedinstr(Ctx&);
template<typename Ctx> Result<> instrs(Ctx&);
template<typename Ctx> Result<> foldedinstrs(Ctx&);
template<typename Ctx> Result<typename Ctx::ExprT> expr(Ctx&);
template<typename Ctx> Result<typename Ctx::MemargT> memarg(Ctx&, uint32_t);
template<typename Ctx> Result<typename Ctx::BlockTypeT> blocktype(Ctx&);
template<typename Ctx>
MaybeResult<> block(Ctx&, const std::vector<Annotation>&, bool);
template<typename Ctx>
MaybeResult<> ifelse(Ctx&, const std::vector<Annotation>&, bool);
template<typename Ctx>
MaybeResult<> loop(Ctx&, const std::vector<Annotation>&, bool);
template<typename Ctx>
MaybeResult<> trycatch(Ctx&, const std::vector<Annotation>&, bool);
template<typename Ctx> MaybeResult<typename Ctx::CatchT> catchinstr(Ctx&);
template<typename Ctx>
MaybeResult<> trytable(Ctx&, const std::vector<Annotation>&, bool);
template<typename Ctx>
Result<> makeUnreachable(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeNop(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeBinary(Ctx&, Index, const std::vector<Annotation>&, BinaryOp op);
template<typename Ctx>
Result<> makeUnary(Ctx&, Index, const std::vector<Annotation>&, UnaryOp op);
template<typename Ctx>
Result<> makeSelect(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeDrop(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeMemorySize(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeMemoryGrow(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeLocalGet(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeLocalTee(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeLocalSet(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeGlobalGet(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeGlobalSet(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeConst(Ctx&, Index, const std::vector<Annotation>&, Type type);
template<typename Ctx>
Result<> makeLoad(Ctx&,
Index,
const std::vector<Annotation>&,
Type type,
bool signed_,
int bytes,
bool isAtomic);
template<typename Ctx>
Result<> makeStore(Ctx&,
Index,
const std::vector<Annotation>&,
Type type,
int bytes,
bool isAtomic);
template<typename Ctx>
Result<> makeAtomicRMW(Ctx&,
Index,
const std::vector<Annotation>&,
AtomicRMWOp op,
Type type,
uint8_t bytes);
template<typename Ctx>
Result<> makeAtomicCmpxchg(
Ctx&, Index, const std::vector<Annotation>&, Type type, uint8_t bytes);
template<typename Ctx>
Result<> makeAtomicWait(Ctx&, Index, const std::vector<Annotation>&, Type type);
template<typename Ctx>
Result<> makeAtomicNotify(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeAtomicFence(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makePause(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeSIMDExtract(
Ctx&, Index, const std::vector<Annotation>&, SIMDExtractOp op, size_t lanes);
template<typename Ctx>
Result<> makeSIMDReplace(
Ctx&, Index, const std::vector<Annotation>&, SIMDReplaceOp op, size_t lanes);
template<typename Ctx>
Result<> makeSIMDShuffle(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<>
makeSIMDTernary(Ctx&, Index, const std::vector<Annotation>&, SIMDTernaryOp op);
template<typename Ctx>
Result<>
makeSIMDShift(Ctx&, Index, const std::vector<Annotation>&, SIMDShiftOp op);
template<typename Ctx>
Result<> makeSIMDLoad(
Ctx&, Index, const std::vector<Annotation>&, SIMDLoadOp op, int bytes);
template<typename Ctx>
Result<> makeSIMDLoadStoreLane(Ctx&,
Index,
const std::vector<Annotation>&,
SIMDLoadStoreLaneOp op,
int bytes);
template<typename Ctx>
Result<> makeMemoryInit(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeDataDrop(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeMemoryCopy(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeMemoryFill(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makePop(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeCall(Ctx&, Index, const std::vector<Annotation>&, bool isReturn);
template<typename Ctx>
Result<>
makeCallIndirect(Ctx&, Index, const std::vector<Annotation>&, bool isReturn);
template<typename Ctx>
Result<>
makeBreak(Ctx&, Index, const std::vector<Annotation>&, bool isConditional);
template<typename Ctx>
Result<> makeBreakTable(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeReturn(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeRefNull(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeRefIsNull(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeRefFunc(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeRefEq(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeTableGet(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeTableSet(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeTableSize(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeTableGrow(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeTableFill(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeTableCopy(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeTableInit(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeElemDrop(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeThrow(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeRethrow(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeThrowRef(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeTupleMake(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeTupleExtract(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeTupleDrop(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<>
makeCallRef(Ctx&, Index, const std::vector<Annotation>&, bool isReturn);
template<typename Ctx>
Result<>
makeRefI31(Ctx&, Index, const std::vector<Annotation>&, Shareability share);
template<typename Ctx>
Result<> makeI31Get(Ctx&, Index, const std::vector<Annotation>&, bool signed_);
template<typename Ctx>
Result<> makeRefTest(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeRefCast(Ctx&, Index, const std::vector<Annotation>&, bool isDesc);
template<typename Ctx>
Result<> makeRefGetDesc(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<>
makeBrOnNull(Ctx&, Index, const std::vector<Annotation>&, bool onFail = false);
template<typename Ctx>
Result<> makeBrOnCast(Ctx&, Index, const std::vector<Annotation>&, BrOnOp op);
template<typename Ctx>
Result<> makeStructNew(
Ctx&, Index, const std::vector<Annotation>&, bool default_, bool isDesc);
template<typename Ctx>
Result<> makeStructGet(Ctx&,
Index,
const std::vector<Annotation>&,
bool signed_ = false);
template<typename Ctx>
Result<> makeAtomicStructGet(Ctx&,
Index,
const std::vector<Annotation>&,
bool signed_ = false);
template<typename Ctx>
Result<> makeStructSet(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeAtomicStructSet(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeStructRMW(AtomicRMWOp, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeStructCmpxchg(Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<>
makeArrayNew(Ctx&, Index, const std::vector<Annotation>&, bool default_);
template<typename Ctx>
Result<> makeArrayNewData(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeArrayNewElem(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeArrayNewFixed(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<>
makeArrayGet(Ctx&, Index, const std::vector<Annotation>&, bool signed_ = false);
template<typename Ctx>
Result<> makeAtomicArrayGet(Ctx&,
Index,
const std::vector<Annotation>&,
bool signed_ = false);
template<typename Ctx>
Result<> makeArraySet(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeAtomicArraySet(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeArrayLen(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeArrayCopy(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeArrayFill(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeArrayInitData(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeArrayInitElem(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeArrayRMW(AtomicRMWOp, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeArrayCmpxchg(Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeRefAs(Ctx&, Index, const std::vector<Annotation>&, RefAsOp op);
template<typename Ctx>
Result<>
makeStringNew(Ctx&, Index, const std::vector<Annotation>&, StringNewOp op);
template<typename Ctx>
Result<> makeStringConst(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeStringMeasure(Ctx&,
Index,
const std::vector<Annotation>&,
StringMeasureOp op);
template<typename Ctx>
Result<> makeStringEncode(Ctx&,
Index,
const std::vector<Annotation>&,
StringEncodeOp op);
template<typename Ctx>
Result<> makeStringConcat(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeStringEq(Ctx&, Index, const std::vector<Annotation>&, StringEqOp);
template<typename Ctx>
Result<> makeStringTest(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeStringWTF16Get(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeStringSliceWTF(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeContNew(Ctx*, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeContBind(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeSuspend(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeResume(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeResumeThrow(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> makeStackSwitch(Ctx&, Index, const std::vector<Annotation>&);
template<typename Ctx>
Result<> ignore(Ctx&, Index, const std::vector<Annotation>&) {
return Ok{};
}
// Modules
template<typename Ctx>
MaybeResult<typename Ctx::HeapTypeT> maybeTypeidx(Ctx& ctx);
template<typename Ctx> Result<typename Ctx::HeapTypeT> typeidx(Ctx&);
template<typename Ctx>
Result<typename Ctx::FieldIdxT> fieldidx(Ctx&, typename Ctx::HeapTypeT);
template<typename Ctx> MaybeResult<typename Ctx::FuncIdxT> maybeFuncidx(Ctx&);
template<typename Ctx> Result<typename Ctx::FuncIdxT> funcidx(Ctx&);
template<typename Ctx> MaybeResult<typename Ctx::TableIdxT> maybeTableidx(Ctx&);
template<typename Ctx> Result<typename Ctx::TableIdxT> tableidx(Ctx&);
template<typename Ctx> MaybeResult<typename Ctx::TableIdxT> maybeTableuse(Ctx&);
template<typename Ctx> MaybeResult<typename Ctx::MemoryIdxT> maybeMemidx(Ctx&);
template<typename Ctx> Result<typename Ctx::MemoryIdxT> memidx(Ctx&);
template<typename Ctx> MaybeResult<typename Ctx::MemoryIdxT> maybeMemuse(Ctx&);
template<typename Ctx> Result<typename Ctx::GlobalIdxT> globalidx(Ctx&);
template<typename Ctx> Result<typename Ctx::ElemIdxT> elemidx(Ctx&);
template<typename Ctx> Result<typename Ctx::DataIdxT> dataidx(Ctx&);
template<typename Ctx> Result<typename Ctx::LocalIdxT> localidx(Ctx&);
template<typename Ctx>
MaybeResult<typename Ctx::LabelIdxT> maybeLabelidx(Ctx&,
bool inDelegate = false);
template<typename Ctx>
Result<typename Ctx::LabelIdxT> labelidx(Ctx&, bool inDelegate = false);
template<typename Ctx> Result<typename Ctx::TagIdxT> tagidx(Ctx&);
template<typename Ctx>
Result<typename Ctx::TypeUseT> typeuse(Ctx&, bool allowNames = true);
template<typename Ctx>
Result<std::pair<typename Ctx::TypeUse, Exactness>> exacttypeuse(Ctx&);
MaybeResult<ImportNames> inlineImport(Lexer&);
Result<std::vector<Name>> inlineExports(Lexer&);
template<typename Ctx> Result<> comptype(Ctx&);
template<typename Ctx> Result<> describedcomptype(Ctx&);
template<typename Ctx> Result<> describingcomptype(Ctx&);
template<typename Ctx> Result<> sharecomptype(Ctx&);
template<typename Ctx> Result<> subtype(Ctx&);
template<typename Ctx> MaybeResult<> typedef_(Ctx&);
template<typename Ctx> MaybeResult<> rectype(Ctx&);
template<typename Ctx> MaybeResult<typename Ctx::LocalsT> locals(Ctx&);
template<typename Ctx> MaybeResult<> import_(Ctx&);
template<typename Ctx> MaybeResult<> func(Ctx&);
template<typename Ctx> MaybeResult<> table(Ctx&);
template<typename Ctx> MaybeResult<> memory(Ctx&);
template<typename Ctx> MaybeResult<> global(Ctx&);
template<typename Ctx> MaybeResult<> export_(Ctx&);
template<typename Ctx> MaybeResult<> start(Ctx&);
template<typename Ctx> MaybeResult<typename Ctx::ExprT> maybeElemexpr(Ctx&);
template<typename Ctx> Result<typename Ctx::ElemListT> elemlist(Ctx&, bool);
template<typename Ctx> MaybeResult<> elem(Ctx&);
template<typename Ctx> Result<typename Ctx::DataStringT> datastring(Ctx&);
template<typename Ctx> MaybeResult<> data(Ctx&);
template<typename Ctx> MaybeResult<> tag(Ctx&);
template<typename Ctx> MaybeResult<> modulefield(Ctx&);
template<typename Ctx> Result<> module(Ctx&);
// =====
// Types
// =====
// absheaptype ::= 'func' | 'extern' | ...
template<typename Ctx>
Result<typename Ctx::HeapTypeT> absheaptype(Ctx& ctx, Shareability share) {
if (ctx.in.takeKeyword("func"sv)) {
return ctx.makeFuncType(share);
}
if (ctx.in.takeKeyword("any"sv)) {
return ctx.makeAnyType(share);
}
if (ctx.in.takeKeyword("extern"sv)) {
return ctx.makeExternType(share);
}
if (ctx.in.takeKeyword("eq"sv)) {
return ctx.makeEqType(share);
}
if (ctx.in.takeKeyword("i31"sv)) {
return ctx.makeI31Type(share);
}
if (ctx.in.takeKeyword("struct"sv)) {
return ctx.makeStructType(share);
}
if (ctx.in.takeKeyword("array"sv)) {
return ctx.makeArrayType(share);
}
if (ctx.in.takeKeyword("exn"sv)) {
return ctx.makeExnType(share);
}
if (ctx.in.takeKeyword("string"sv)) {
return ctx.makeStringType(share);
}
if (ctx.in.takeKeyword("cont"sv)) {
return ctx.makeContType(share);
}
if (ctx.in.takeKeyword("none"sv)) {
return ctx.makeNoneType(share);
}
if (ctx.in.takeKeyword("noextern"sv)) {
return ctx.makeNoextType(share);
}
if (ctx.in.takeKeyword("nofunc"sv)) {
return ctx.makeNofuncType(share);
}
if (ctx.in.takeKeyword("noexn"sv)) {
return ctx.makeNoexnType(share);
}
if (ctx.in.takeKeyword("nocont"sv)) {
return ctx.makeNocontType(share);
}
return ctx.in.err("expected abstract heap type");
}
// heaptype ::= x:typeidx => types[x]
// | '(' 'exact' x:typeidx ')' => exact types[x]
// | t:absheaptype => unshared t
// | '(' 'shared' t:absheaptype ')' => shared t
template<typename Ctx> Result<typename Ctx::HeapTypeT> heaptype(Ctx& ctx) {
if (auto t = maybeTypeidx(ctx)) {
CHECK_ERR(t);
return *t;
}
if (ctx.in.takeSExprStart("exact"sv)) {
auto t = typeidx(ctx);
CHECK_ERR(t);
if (!ctx.in.takeRParen()) {
return ctx.in.err("expected end of exact heap type");
}
return ctx.makeExact(*t);
}
auto share = ctx.in.takeSExprStart("shared"sv) ? Shared : Unshared;
auto t = absheaptype(ctx, share);
CHECK_ERR(t);
if (share == Shared && !ctx.in.takeRParen()) {
return ctx.in.err("expected end of shared abstract heap type");
}
return *t;
}
// reftype ::= 'funcref' => funcref
// | 'externref' => externref
// | 'anyref' => anyref
// | 'eqref' => eqref
// | 'i31ref' => i31ref
// | 'structref' => structref
// | 'arrayref' => arrayref
// | '(' ref null? t:heaptype ')' => ref null? t
template<typename Ctx> MaybeResult<typename Ctx::TypeT> maybeReftype(Ctx& ctx) {
if (ctx.in.takeKeyword("funcref"sv)) {
return ctx.makeRefType(ctx.makeFuncType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("externref"sv)) {
return ctx.makeRefType(ctx.makeExternType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("anyref"sv)) {
return ctx.makeRefType(ctx.makeAnyType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("eqref"sv)) {
return ctx.makeRefType(ctx.makeEqType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("i31ref"sv)) {
return ctx.makeRefType(ctx.makeI31Type(Unshared), Nullable);
}
if (ctx.in.takeKeyword("structref"sv)) {
return ctx.makeRefType(ctx.makeStructType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("arrayref"sv)) {
return ctx.makeRefType(ctx.makeArrayType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("exnref"sv)) {
return ctx.makeRefType(ctx.makeExnType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("stringref"sv)) {
return ctx.makeRefType(ctx.makeStringType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("contref"sv)) {
return ctx.makeRefType(ctx.makeContType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("nullref"sv)) {
return ctx.makeRefType(ctx.makeNoneType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("nullexternref"sv)) {
return ctx.makeRefType(ctx.makeNoextType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("nullfuncref"sv)) {
return ctx.makeRefType(ctx.makeNofuncType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("nullexnref"sv)) {
return ctx.makeRefType(ctx.makeNoexnType(Unshared), Nullable);
}
if (ctx.in.takeKeyword("nullcontref"sv)) {
return ctx.makeRefType(ctx.makeNocontType(Unshared), Nullable);
}
if (!ctx.in.takeSExprStart("ref"sv)) {
return {};
}
auto nullability = ctx.in.takeKeyword("null"sv) ? Nullable : NonNullable;
auto type = heaptype(ctx);
CHECK_ERR(type);
if (!ctx.in.takeRParen()) {
return ctx.in.err("expected end of reftype");
}
return ctx.makeRefType(*type, nullability);
}
template<typename Ctx> Result<typename Ctx::TypeT> reftype(Ctx& ctx) {
if (auto t = maybeReftype(ctx)) {
CHECK_ERR(t);
return *t;
}
return ctx.in.err("expected reftype");
}
// tupletype ::= '(' 'tuple' valtype* ')'
template<typename Ctx> MaybeResult<typename Ctx::TypeT> tupletype(Ctx& ctx) {
if (!ctx.in.takeSExprStart("tuple"sv)) {
return {};
}
auto elems = ctx.makeTupleElemList();
size_t numElems = 0;
while (!ctx.in.takeRParen()) {
auto elem = singlevaltype(ctx);
CHECK_ERR(elem);
ctx.appendTupleElem(elems, *elem);
++numElems;
}
if (numElems < 2) {
return ctx.in.err("tuples must have at least two elements");
}
return ctx.makeTupleType(elems);
}
// numtype ::= 'i32' => i32
// | 'i64' => i64
// | 'f32' => f32
// | 'f64' => f64
// vectype ::= 'v128' => v128
// singlevaltype ::= t:numtype => t
// | t:vectype => t
// | t:reftype => t
template<typename Ctx> Result<typename Ctx::TypeT> singlevaltype(Ctx& ctx) {
if (ctx.in.takeKeyword("i32"sv)) {
return ctx.makeI32();
} else if (ctx.in.takeKeyword("i64"sv)) {
return ctx.makeI64();
} else if (ctx.in.takeKeyword("f32"sv)) {
return ctx.makeF32();
} else if (ctx.in.takeKeyword("f64"sv)) {
return ctx.makeF64();
} else if (ctx.in.takeKeyword("v128"sv)) {
return ctx.makeV128();
} else if (auto type = maybeReftype(ctx)) {
CHECK_ERR(type);
return *type;
} else {
return ctx.in.err("expected valtype");
}
}
// valtype ::= singlevaltype | tupletype
template<typename Ctx> Result<typename Ctx::TypeT> valtype(Ctx& ctx) {
if (auto type = tupletype(ctx)) {
CHECK_ERR(type);
return *type;
}
return singlevaltype(ctx);
}
// param ::= '(' 'param id? t:valtype ')' => [t]
// | '(' 'param t*:valtype* ')' => [t*]
// params ::= param*
template<typename Ctx>
MaybeResult<typename Ctx::ParamsT> params(Ctx& ctx, bool allowNames) {
bool hasAny = false;
auto res = ctx.makeParams();
while (ctx.in.takeSExprStart("param"sv)) {
hasAny = true;
auto pos = ctx.in.getPos();
if (auto id = ctx.in.takeID()) {
// Single named param
if (!allowNames) {
return ctx.in.err(pos, "unexpected named parameter");
}
auto type = valtype(ctx);
CHECK_ERR(type);
if (!ctx.in.takeRParen()) {
return ctx.in.err("expected end of param");
}
ctx.appendParam(res, *id, *type);
} else {
// Repeated unnamed params
while (!ctx.in.takeRParen()) {
auto type = valtype(ctx);
CHECK_ERR(type);
ctx.appendParam(res, {}, *type);
}
}
}
if (hasAny) {
return res;
}
return {};
}
// result ::= '(' 'result' t*:valtype ')' => [t*]
// results ::= result*
template<typename Ctx> MaybeResult<typename Ctx::ResultsT> results(Ctx& ctx) {
bool hasAny = false;
auto res = ctx.makeResults();
while (ctx.in.takeSExprStart("result"sv)) {
hasAny = true;
while (!ctx.in.takeRParen()) {
auto type = valtype(ctx);
CHECK_ERR(type);
ctx.appendResult(res, *type);
}
}
if (hasAny) {
return res;
}
return {};
}
// functype ::= '(' 'func' t1*:vec(param) t2*:vec(result) ')' => [t1*] -> [t2*]
template<typename Ctx>
MaybeResult<typename Ctx::SignatureT> functype(Ctx& ctx) {
if (!ctx.in.takeSExprStart("func"sv)) {
return {};
}
auto parsedParams = params(ctx);
CHECK_ERR(parsedParams);
auto parsedResults = results(ctx);
CHECK_ERR(parsedResults);
if (!ctx.in.takeRParen()) {
return ctx.in.err("expected end of functype");
}
return ctx.makeFuncType(parsedParams.getPtr(), parsedResults.getPtr());
}
// conttype ::= '(' 'cont' x:typeidx ')' => cont x
template<typename Ctx>
MaybeResult<typename Ctx::ContinuationT> conttype(Ctx& ctx) {
if (!ctx.in.takeSExprStart("cont"sv)) {
return {};
}
auto x = typeidx(ctx);
CHECK_ERR(x);
if (!ctx.in.takeRParen()) {
return ctx.in.err("expected end of cont type");
}
return ctx.makeContType(*x);
}
// storagetype ::= valtype | packedtype
// packedtype ::= i8 | i16
template<typename Ctx> Result<typename Ctx::FieldT> storagetype(Ctx& ctx) {
if (ctx.in.takeKeyword("i8"sv)) {
return ctx.makeI8();
}
if (ctx.in.takeKeyword("i16"sv)) {
return ctx.makeI16();
}
if (ctx.in.takeKeyword("waitqueue"sv)) {
return ctx.makeWaitQueue();
}
auto type = valtype(ctx);
CHECK_ERR(type);
return ctx.makeStorageType(*type);
}
// fieldtype ::= t:storagetype => const t
// | '(' 'mut' t:storagetype ')' => var t
template<typename Ctx> Result<typename Ctx::FieldT> fieldtype(Ctx& ctx) {
auto mutability = Immutable;
if (ctx.in.takeSExprStart("mut"sv)) {
mutability = Mutable;
}
auto field = storagetype(ctx);
CHECK_ERR(field);
if (mutability == Mutable) {
if (!ctx.in.takeRParen()) {
return ctx.in.err("expected end of field type");
}
}
return ctx.makeFieldType(*field, mutability);
}
// field ::= '(' 'field' id t:fieldtype ')' => [(id, t)]
// | '(' 'field' t*:fieldtype* ')' => [(_, t*)*]
// | fieldtype
template<typename Ctx> Result<typename Ctx::FieldsT> fields(Ctx& ctx) {
auto res = ctx.makeFields();
while (true) {
if (ctx.in.empty() || ctx.in.peekRParen()) {
return res;
}
if (ctx.in.takeSExprStart("field")) {
if (auto id = ctx.in.takeID()) {
auto field = fieldtype(ctx);
CHECK_ERR(field);
if (!ctx.in.takeRParen()) {
return ctx.in.err("expected end of field");
}
ctx.appendField(res, *id, *field);
} else {
while (!ctx.in.takeRParen()) {
auto field = fieldtype(ctx);
CHECK_ERR(field);
ctx.appendField(res, {}, *field);
}
}
} else {
auto field = fieldtype(ctx);
CHECK_ERR(field);
ctx.appendField(res, {}, *field);
}
}
}
// structtype ::= '(' 'struct' field* ')'
template<typename Ctx> MaybeResult<typename Ctx::StructT> structtype(Ctx& ctx) {
if (!ctx.in.takeSExprStart("struct"sv)) {
return {};
}
auto namedFields = fields(ctx);
CHECK_ERR(namedFields);
if (!ctx.in.takeRParen()) {
return ctx.in.err("expected end of struct definition");
}
return ctx.makeStruct(*namedFields);
}
// arraytype ::= '(' 'array' field ')'
template<typename Ctx> MaybeResult<typename Ctx::ArrayT> arraytype(Ctx& ctx) {
if (!ctx.in.takeSExprStart("array"sv)) {
return {};
}
auto namedFields = fields(ctx);
CHECK_ERR(namedFields);
if (!ctx.in.takeRParen()) {
return ctx.in.err("expected end of array definition");
}
if (auto array = ctx.makeArray(*namedFields)) {
return *array;
}
return ctx.in.err("expected exactly one field in array definition");
}
// limits32 ::= n:u32 m:u32?
template<typename Ctx> Result<typename Ctx::LimitsT> limits32(Ctx& ctx) {
auto n = ctx.in.takeU32();
if (!n) {
return ctx.in.err("expected initial size");
}
std::optional<uint64_t> m = ctx.in.takeU32();
return ctx.makeLimits(uint64_t(*n), m);
}
// limits64 ::= n:u64 m:u64?
template<typename Ctx> Result<typename Ctx::LimitsT> limits64(Ctx& ctx) {
auto n = ctx.in.takeU64();
if (!n) {
return ctx.in.err("expected initial size");
}
std::optional<uint64_t> m = ctx.in.takeU64();
return ctx.makeLimits(uint64_t(*n), m);
}
// mempagesize? ::= ('(' 'pagesize' u64 ')') ?
template<typename Ctx> MaybeResult<uint8_t> mempagesize(Ctx& ctx) {
if (!ctx.in.takeSExprStart("pagesize"sv)) {
return {}; // No pagesize specified
}
auto pageSize = ctx.in.takeU64();
if (!pageSize) {
return ctx.in.err("expected page size");
}
if (!Bits::isPowerOf2(*pageSize)) {
return ctx.in.err("page size must be a power of two");
}
if (!ctx.in.takeRParen()) {
return ctx.in.err("expected end of mempagesize");
}
uint8_t pageSizeLog2 = (uint8_t)Bits::ceilLog2(*pageSize);
if (pageSizeLog2 != 0 && pageSizeLog2 != Memory::kDefaultPageSizeLog2) {
return ctx.in.err("memory page size can only be 1 or 64 KiB");
}
return pageSizeLog2;
}
// memtype ::= (limits32 | 'i32' limits32 | 'i64' limit64) shared? mempagesize?
// note: the index type 'i32' or 'i64' is already parsed to simplify parsing of
// memory abbreviations.
template<typename Ctx> Result<typename Ctx::MemTypeT> memtype(Ctx& ctx) {
Type addressType = Type::i32;
if (ctx.in.takeKeyword("i64"sv)) {
addressType = Type::i64;
} else {
ctx.in.takeKeyword("i32"sv);
}
return memtypeContinued(ctx, addressType);
}
template<typename Ctx>
Result<typename Ctx::MemTypeT> memtypeContinued(Ctx& ctx, Type addressType) {
assert(addressType == Type::i32 || addressType == Type::i64);
auto limits = addressType == Type::i32 ? limits32(ctx) : limits64(ctx);
CHECK_ERR(limits);
bool shared = false;
if (ctx.in.takeKeyword("shared"sv)) {
shared = true;
}
MaybeResult<uint8_t> mempageSize = mempagesize(ctx);
CHECK_ERR(mempageSize);
const uint8_t pageSizeLog2 =
mempageSize ? *mempageSize : Memory::kDefaultPageSizeLog2;
return ctx.makeMemType(addressType, *limits, shared, pageSizeLog2);
}
// memorder ::= 'seqcst' | 'acqrel'
template<typename Ctx> MaybeResult<MemoryOrder> maybeMemOrder(Ctx& ctx) {
if (ctx.in.takeKeyword("seqcst"sv)) {
return MemoryOrder::SeqCst;
}
if (ctx.in.takeKeyword("acqrel"sv)) {
return MemoryOrder::AcqRel;
}
return {};
}
// memorder ::= '' | 'seqcst' | 'acqrel'
template<typename Ctx> Result<MemoryOrder> memorder(Ctx& ctx) {
auto order = maybeMemOrder(ctx);
CHECK_ERR(order);
return order ? *order : MemoryOrder::SeqCst;
}
// tabletype ::= (limits32 | 'i32' limits32 | 'i64' limit64) reftype
template<typename Ctx> Result<typename Ctx::TableTypeT> tabletype(Ctx& ctx) {
Type addressType = Type::i32;
if (ctx.in.takeKeyword("i64"sv)) {
addressType = Type::i64;
} else {
ctx.in.takeKeyword("i32"sv);
}
return tabletypeContinued(ctx, addressType);
}
template<typename Ctx>
Result<typename Ctx::TableTypeT> tabletypeContinued(Ctx& ctx,
Type addressType) {
auto limits = addressType == Type::i32 ? limits32(ctx) : limits64(ctx);
CHECK_ERR(limits);
auto type = reftype(ctx);
CHECK_ERR(type);
return ctx.makeTableType(addressType, *limits, *type);
}
// globaltype ::= t:valtype => const t
// | '(' 'mut' t:valtype ')' => var t
template<typename Ctx> Result<typename Ctx::GlobalTypeT> globaltype(Ctx& ctx) {
auto mutability = Immutable;
if (ctx.in.takeSExprStart("mut"sv)) {
mutability = Mutable;
}
auto type = valtype(ctx);
CHECK_ERR(type);
if (mutability == Mutable && !ctx.in.takeRParen()) {
return ctx.in.err("expected end of globaltype");
}
return ctx.makeGlobalType(mutability, *type);
}
// arity ::= x:u32 (if x >=2 )
template<typename Ctx> Result<uint32_t> tupleArity(Ctx& ctx) {
auto arity = ctx.in.takeU32();
if (!arity) {
return ctx.in.err("expected tuple arity");
}
if (*arity < 2) {
return ctx.in.err("tuple arity must be at least 2");
}
return *arity;
}
// ============
// Instructions
// ============
// blockinstr ::= block | loop | if-else | try-catch | try_table
template<typename Ctx>
MaybeResult<> foldedBlockinstr(Ctx& ctx,
const std::vector<Annotation>& annotations) {
ctx.setSrcLoc(annotations);
if (auto i = block(ctx, annotations, true)) {
return i;
}
if (auto i = ifelse(ctx, annotations, true)) {
return i;
}
if (auto i = loop(ctx, annotations, true)) {
return i;
}
if (auto i = trycatch(ctx, annotations, true)) {
return i;
}
if (auto i = trytable(ctx, annotations, true)) {
return i;
}
return {};
}
template<typename Ctx>
MaybeResult<> unfoldedBlockinstr(Ctx& ctx,
const std::vector<Annotation>& annotations) {
ctx.setSrcLoc(annotations);
if (auto i = block(ctx, annotations, false)) {
return i;
}
if (auto i = ifelse(ctx, annotations, false)) {
return i;
}
if (auto i = loop(ctx, annotations, false)) {
return i;
}
if (auto i = trycatch(ctx, annotations, false)) {
return i;