chromium/v8/src/wasm/constant-expression-interface.h

// Copyright 2021 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#if !V8_ENABLE_WEBASSEMBLY
#error This header should only be included if WebAssembly is enabled.
#endif  // !V8_ENABLE_WEBASSEMBLY

#ifndef V8_WASM_CONSTANT_EXPRESSION_INTERFACE_H_
#define V8_WASM_CONSTANT_EXPRESSION_INTERFACE_H_

#include "src/wasm/decoder.h"
#include "src/wasm/function-body-decoder-impl.h"
#include "src/wasm/wasm-value.h"

namespace v8 {
namespace internal {

class WasmTrustedInstanceData;
class JSArrayBuffer;

namespace wasm {

// An interface for WasmFullDecoder used to decode constant expressions.
// This interface has two modes: only validation (when {isolate_ == nullptr}),
// and code-generation (when {isolate_ != nullptr}). We merge two distinct
// functionalities in one class to reduce the number of WasmFullDecoder
// instantiations, and thus V8 binary code size.
// In code-generation mode, the result can be retrieved with {computed_value()}
// if {!has_error()}, or with {error()} otherwise.
class V8_EXPORT_PRIVATE ConstantExpressionInterface { … };

}  // namespace wasm
}  // namespace internal
}  // namespace v8

#endif  // V8_WASM_CONSTANT_EXPRESSION_INTERFACE_H_