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c12f8b80dc
The JS runtime is full of checks for is<NumberObject> and friends. They were showing up in a Speedometer profile as ~1% spent in dynamic_cast, and this basically chops that down to nothing.
80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/String.h>
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#include <LibJS/Runtime/Completion.h>
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#include <LibJS/Runtime/Object.h>
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#include <LibJS/SourceRange.h>
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namespace JS {
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struct TracebackFrame {
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FlyString function_name;
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[[nodiscard]] SourceRange const& source_range() const;
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RefPtr<CachedSourceRange> cached_source_range;
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};
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enum CompactTraceback {
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No,
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Yes,
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};
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class Error : public Object {
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JS_OBJECT(Error, Object);
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GC_DECLARE_ALLOCATOR(Error);
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public:
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static GC::Ref<Error> create(Realm&);
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static GC::Ref<Error> create(Realm&, String message);
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static GC::Ref<Error> create(Realm&, StringView message);
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virtual ~Error() override = default;
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[[nodiscard]] String stack_string(CompactTraceback compact = CompactTraceback::No) const;
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ThrowCompletionOr<void> install_error_cause(Value options);
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Vector<TracebackFrame, 32> const& traceback() const { return m_traceback; }
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protected:
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explicit Error(Object& prototype);
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private:
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virtual bool is_error() const final { return true; }
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void populate_stack();
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Vector<TracebackFrame, 32> m_traceback;
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};
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template<>
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inline bool Object::fast_is<Error>() const { return is_error(); }
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// NOTE: Making these inherit from Error is not required by the spec but
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// our way of implementing the [[ErrorData]] internal slot, which is
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// used in Object.prototype.toString().
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#define DECLARE_NATIVE_ERROR(ClassName, snake_name, PrototypeName, ConstructorName) \
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class ClassName final : public Error { \
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JS_OBJECT(ClassName, Error); \
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GC_DECLARE_ALLOCATOR(ClassName); \
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\
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public: \
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static GC::Ref<ClassName> create(Realm&); \
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static GC::Ref<ClassName> create(Realm&, String message); \
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static GC::Ref<ClassName> create(Realm&, StringView message); \
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\
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explicit ClassName(Object& prototype); \
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virtual ~ClassName() override = default; \
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};
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
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DECLARE_NATIVE_ERROR(ClassName, snake_name, PrototypeName, ConstructorName)
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JS_ENUMERATE_NATIVE_ERRORS
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#undef __JS_ENUMERATE
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}
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