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aa8a5f174d
* Replaced std::exit() with return llvm::Expected/llvm::Error<T> for expected errors like invalid syntax. * Use llvm::formatv() for formatting lexer error messages. x * Addresed merge errors. * Fixed impl scope. * Made ErrorBuilder::operator<< nodiscard, to catch code forgetting 'return' in 'return FATAL_COMPILATION_ERROR()'. * FatalComplationError() -> ParseAndLexContext::RecordLexerError(). Other usages of ERROR_TOKEN in lexer.lpp were actually supposed to be END_OF_FILE. * Update executable_semantics/syntax/parse_and_lex_context.h Co-authored-by: Jon Meow <jperkins@google.com> * Code review fixes. * Update executable_semantics/syntax/parser.ypp Co-authored-by: Jon Meow <jperkins@google.com> * More code review fixes. * Update executable_semantics/interpreter/type_checker.h Co-authored-by: Jon Meow <jperkins@google.com> * Yet more code review fixes... * Update executable_semantics/syntax/lexer.lpp Co-authored-by: Jon Meow <jperkins@google.com> * code review comments * Update executable_semantics/interpreter/interpreter.cpp Co-authored-by: Geoff Romer <gromer@google.com> * Apply suggestions from code review Co-authored-by: Jon Meow <jperkins@google.com> * Update executable_semantics/syntax/lexer.lpp Co-authored-by: Jon Meow <jperkins@google.com> * code review * code review * Apply suggestions from code review Co-authored-by: Jon Meow <jperkins@google.com> * formatted code * review comments * Switched to the new ErrorOr<V> error implementation * code review comments * fixed comment * restored ostream.h as #976 makes the change unnecesary * review comments Co-authored-by: Jon Meow <jperkins@google.com> Co-authored-by: Geoff Romer <gromer@google.com>
64 lines
2.1 KiB
C++
64 lines
2.1 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_HEAP_H_
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#define EXECUTABLE_SEMANTICS_INTERPRETER_HEAP_H_
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#include <vector>
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#include "common/ostream.h"
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#include "executable_semantics/ast/source_location.h"
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#include "executable_semantics/common/nonnull.h"
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#include "executable_semantics/interpreter/address.h"
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#include "executable_semantics/interpreter/heap_allocation_interface.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 : public HeapAllocationInterface {
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public:
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// Constructs an empty Heap.
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explicit Heap(Nonnull<Arena*> arena) : arena_(arena){};
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Heap(const Heap&) = delete;
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auto operator=(const Heap&) -> 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, SourceLocation source_loc) const
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-> ErrorOr<Nonnull<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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auto Write(const Address& a, Nonnull<const Value*> v,
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SourceLocation source_loc) -> ErrorOr<Success>;
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// Put the given value on the heap and mark it as alive.
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auto AllocateValue(Nonnull<const Value*> v) -> AllocationId override;
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// Marks this allocation, and all of its sub-objects, as dead.
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void Deallocate(AllocationId allocation) override;
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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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LLVM_DUMP_METHOD void Dump() const { Print(llvm::errs()); }
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auto arena() const -> Arena& override { return *arena_; }
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private:
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// Signal an error if the allocation is no longer alive.
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auto CheckAlive(AllocationId allocation, SourceLocation source_loc) const
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-> ErrorOr<Success>;
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Nonnull<Arena*> arena_;
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std::vector<Nonnull<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_HEAP_H_
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