mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-30 06:35:01 +01:00
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
1.9 KiB
C++
56 lines
1.9 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
|
#ifndef EXECUTABLE_SEMANTICS_INTERPRETER_FRAME_H_
|
|
#define EXECUTABLE_SEMANTICS_INTERPRETER_FRAME_H_
|
|
|
|
#include <list>
|
|
#include <string>
|
|
|
|
#include "common/ostream.h"
|
|
#include "executable_semantics/interpreter/action.h"
|
|
#include "executable_semantics/interpreter/address.h"
|
|
#include "executable_semantics/interpreter/dictionary.h"
|
|
#include "executable_semantics/interpreter/stack.h"
|
|
|
|
namespace Carbon {
|
|
|
|
using Env = Dictionary<std::string, Address>;
|
|
|
|
struct Scope {
|
|
Scope(Env values, std::list<std::string> l)
|
|
: values(values), locals(std::move(l)) {}
|
|
Env values;
|
|
std::list<std::string> locals;
|
|
};
|
|
|
|
// A frame represents either a function call or a delimited continuation.
|
|
struct Frame {
|
|
// The name of the function.
|
|
std::string name;
|
|
// If the frame represents a function call, the bottom scope
|
|
// contains the parameter-argument bindings for this function
|
|
// call. The rest of the scopes contain local variables defined by
|
|
// blocks within the function. The scope at the top of the stack is
|
|
// the current scope and its environment is the one used for looking
|
|
// up the value associated with a variable.
|
|
Stack<Scope*> scopes;
|
|
// The actions that need to be executed in the future of the
|
|
// current function call. The top of the stack is the action
|
|
// that is executed first.
|
|
Stack<Action*> todo;
|
|
// If this frame is the bottom frame of a continuation, then it stores
|
|
// the address of the continuation.
|
|
std::optional<Address> continuation;
|
|
|
|
Frame(std::string n, Stack<Scope*> s, Stack<Action*> c)
|
|
: name(std::move(std::move(n))), scopes(s), todo(c), continuation() {}
|
|
|
|
void Print(llvm::raw_ostream& out) const;
|
|
};
|
|
|
|
} // namespace Carbon
|
|
|
|
#endif // EXECUTABLE_SEMANTICS_INTERPRETER_FRAME_H_
|