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Jon Meow
8fccecadeb
- Switch code to llvm::raw_ostream as part of standardizing output forms.
- Preferring llvm::raw_ostream over std::ostream because other tooling code should be expected to rely on llvm more closely, and an overall preference towards library consistency.
- There are a couple spots in syntax/ that still use std streams, but I'd prefer to take a separate PR to see how best to address those.
- std::boolalpha doesn't work with llvm, so I've implemented equivalent in a couple places (not enough that it felt like worth making a helper function).
- Implement Print(ostream) as consistently as we can, as an instance member.
- This facilitates the use of the common/ostream.h template to provide operators.
- Preferring this approach so that Print is easily accessible via gdb, per suggestion on #executable-semantics.
- Switch code currently calling `type->Print(ostream)` to instead do `ostream << *type`.
- Remove the unused `PrintTypeEnv`, nothing used it and the declaration didn't match the definition.
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef EXECUTABLE_SEMANTICS_INTERPRETER_MEMORY_H_
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#define EXECUTABLE_SEMANTICS_INTERPRETER_MEMORY_H_
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#include <vector>
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#include "common/ostream.h"
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#include "executable_semantics/interpreter/address.h"
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#include "executable_semantics/interpreter/value.h"
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namespace Carbon {
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// A Heap represents the abstract machine's dynamically allocated memory.
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class Heap {
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public:
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// Constructs an empty Heap.
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Heap() = default;
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Heap(const Heap&) = delete;
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Heap& operator=(const Heap&) = delete;
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// Returns the value at the given address in the heap after
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// checking that it is alive.
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auto Read(const Address& a, int line_num) -> const Value*;
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// Writes the given value at the address in the heap after
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// checking that the address is alive.
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void Write(const Address& a, const Value* v, int line_num);
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// Put the given value on the heap and mark it as alive.
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auto AllocateValue(const Value* v) -> Address;
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// Marks the object at this address, and all of its sub-objects, as dead.
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void Deallocate(const Address& address);
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// Print the value at the given address to the stream `out`.
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void PrintAddress(const Address& a, llvm::raw_ostream& out) const;
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// Print all the values on the heap to the stream `out`.
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void Print(llvm::raw_ostream& out) const;
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private:
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// Signal an error if the address is no longer alive.
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void CheckAlive(const Address& address, int line_num);
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std::vector<const Value*> values_;
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std::vector<bool> alive_;
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};
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} // namespace Carbon
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#endif // EXECUTABLE_SEMANTICS_INTERPRETER_MEMORY_H_
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