Alexander Markov
00d6b8972a
This change adds a new VM-internal class for sentinel objects. Previously sentinel objects used class Never. TEST=existing tests Issue: https://github.com/dart-lang/sdk/issues/46141 Change-Id: Ibb3361092967132f4f1952d64fe0168659f3075e Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/202870 Commit-Queue: Alexander Markov <alexmarkov@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef RUNTIME_VM_COMPILER_FRONTEND_CONSTANT_READER_H_
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#define RUNTIME_VM_COMPILER_FRONTEND_CONSTANT_READER_H_
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#if defined(DART_PRECOMPILED_RUNTIME)
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#error "AOT runtime should not use compiler sources (including header files)"
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#endif // defined(DART_PRECOMPILED_RUNTIME)
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#include "vm/compiler/frontend/kernel_translation_helper.h"
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#include "vm/hash_table.h"
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#include "vm/object.h"
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namespace dart {
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namespace kernel {
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// Reads and caches constants from the kernel constant pool.
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class ConstantReader {
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public:
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ConstantReader(KernelReaderHelper* helper, ActiveClass* active_class);
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virtual ~ConstantReader() {}
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InstancePtr ReadConstantInitializer();
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InstancePtr ReadConstantExpression();
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ObjectPtr ReadAnnotations();
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// Peeks to see if constant at the given index will evaluate to
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// instance of the given clazz.
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bool IsInstanceConstant(intptr_t constant_index, const Class& clazz);
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// Reads a constant at the given index (possibly by recursing
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// into sub-constants).
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InstancePtr ReadConstant(intptr_t constant_index);
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intptr_t NumConstants();
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private:
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InstancePtr ReadConstantInternal(intptr_t constant_index);
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intptr_t NavigateToIndex(KernelReaderHelper* reader, intptr_t constant_index);
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intptr_t NumConstants(KernelReaderHelper* reader);
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KernelReaderHelper* helper_;
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Zone* zone_;
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TranslationHelper& translation_helper_;
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ActiveClass* active_class_;
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const Script& script_;
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Object& result_;
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DISALLOW_COPY_AND_ASSIGN(ConstantReader);
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};
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} // namespace kernel
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} // namespace dart
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#endif // RUNTIME_VM_COMPILER_FRONTEND_CONSTANT_READER_H_
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