mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-04 22:02:52 +01:00
Dana Jansens
f0663715dd
Use TypeInstId in many more places where the instruction is required to/known to always be a type value. This should be a somewhat exhaustive set of places, as it covers all instructions given to GetTypeIdFromTypeInstId(). The things of interest here are: - Singleton instructions are always of type TypeType, so they are now TypeInstIds. - ErrorInst::SingletonInstId gets upcast to be an InstId because it's sometimes used to define the type of a variable (as in `auto inst_id = SemIR::ErrorInst::SingletonInstId;` that may hold other InstIds. - Parse nodes don't really know about TypeInstId, so NodeStack::Push needs to do some special casing to avoid CHECK failures when given a TypeInstId but expecting an InstId. We leave a TODO behind here because the nodes which are being pushed a TypeInstId should probably be taught to expect that, but such a change is a bit tricky, so too much for this PR.
107 lines
4.5 KiB
C++
107 lines
4.5 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 CARBON_TOOLCHAIN_CHECK_ACTION_H_
|
|
#define CARBON_TOOLCHAIN_CHECK_ACTION_H_
|
|
|
|
#include "toolchain/check/context.h"
|
|
#include "toolchain/check/inst.h"
|
|
#include "toolchain/sem_ir/ids.h"
|
|
#include "toolchain/sem_ir/inst.h"
|
|
|
|
namespace Carbon::Check {
|
|
|
|
// Performs a member access action. Defined in member_access.cpp.
|
|
auto PerformAction(Context& context, SemIR::LocId loc_id,
|
|
SemIR::AccessMemberAction action) -> SemIR::InstId;
|
|
auto PerformAction(Context& context, SemIR::LocId loc_id,
|
|
SemIR::AccessOptionalMemberAction action) -> SemIR::InstId;
|
|
|
|
// Performs a conversion action. Defined in convert.cpp.
|
|
auto PerformAction(Context& context, SemIR::LocId loc_id,
|
|
SemIR::ConvertToValueAction action) -> SemIR::InstId;
|
|
|
|
// Performs a type refinement action, by creating a conversion from an
|
|
// instruction with a template-dependent symbolic type to the corresponding
|
|
// instantiated type.
|
|
auto PerformAction(Context& context, SemIR::LocId loc_id,
|
|
SemIR::RefineTypeAction action) -> SemIR::InstId;
|
|
|
|
// Determines whether the given action depends on a template parameter in a way
|
|
// that means it cannot be performed immediately.
|
|
auto ActionIsDependent(Context& context, SemIR::Inst action_inst) -> bool;
|
|
|
|
// Determines whether the given action operand depends on a template parameter
|
|
// in a way that means the action cannot be performed immediately.
|
|
auto OperandIsDependent(Context& context, SemIR::InstId inst_id) -> bool;
|
|
|
|
// Determines whether the given action operand depends on a template parameter
|
|
// in a way that means the action cannot be performed immediately.
|
|
auto OperandIsDependent(Context& context, SemIR::TypeInstId inst_id) -> bool;
|
|
|
|
// Determines whether the given type depends on a template parameter
|
|
// in a way that means the action cannot be performed immediately.
|
|
auto OperandIsDependent(Context& context, SemIR::TypeId type_id) -> bool;
|
|
|
|
// Adds an instruction to the current block to splice in the result of
|
|
// performing a dependent action.
|
|
auto AddDependentActionSplice(Context& context, SemIR::LocIdAndInst action,
|
|
SemIR::TypeInstId result_type_inst_id)
|
|
-> SemIR::InstId;
|
|
|
|
// Convenience wrapper for `AddDependentActionSplice`.
|
|
template <typename LocT, typename InstT>
|
|
auto AddDependentActionSplice(Context& context, LocT loc, InstT inst,
|
|
SemIR::TypeInstId result_type_inst_id)
|
|
-> SemIR::InstId {
|
|
return AddDependentActionSplice(context, SemIR::LocIdAndInst(loc, inst),
|
|
result_type_inst_id);
|
|
}
|
|
|
|
// Handles a new action. If the action is not dependent, it is performed
|
|
// immediately. Otherwise, adds the action to the enclosing template's eval
|
|
// block and creates an instruction to splice in the result of the action.
|
|
template <typename ActionT>
|
|
auto HandleAction(Context& context, SemIR::LocId loc_id, ActionT action_inst,
|
|
SemIR::TypeInstId result_type_inst_id =
|
|
SemIR::TypeInstId::None) -> SemIR::InstId {
|
|
if (ActionIsDependent(context, action_inst) ||
|
|
(result_type_inst_id.has_value() &&
|
|
OperandIsDependent(context, result_type_inst_id))) {
|
|
return AddDependentActionSplice(
|
|
context, SemIR::LocIdAndInst(loc_id, action_inst), result_type_inst_id);
|
|
}
|
|
|
|
return PerformAction(context, loc_id, action_inst);
|
|
}
|
|
|
|
namespace Internal {
|
|
// Performs setup steps for performing a delayed action. This is an
|
|
// implementation detail of PerformDelayedAction and should not be called
|
|
// directly.
|
|
auto BeginPerformDelayedAction(Context& context) -> void;
|
|
|
|
// Performs cleanup steps for performing a delayed action. This is an
|
|
// implementation detail of PerformDelayedAction and should not be called
|
|
// directly.
|
|
auto EndPerformDelayedAction(Context& context, SemIR::InstId result_id)
|
|
-> SemIR::InstId;
|
|
} // namespace Internal
|
|
|
|
// Performs an action as a result of evaluation of a template's eval block.
|
|
template <typename ActionT>
|
|
auto PerformDelayedAction(Context& context, SemIR::LocId loc_id,
|
|
ActionT action_inst) -> SemIR::InstId {
|
|
if (ActionIsDependent(context, action_inst)) {
|
|
return SemIR::InstId::None;
|
|
}
|
|
Internal::BeginPerformDelayedAction(context);
|
|
auto inst_id = PerformAction(context, loc_id, action_inst);
|
|
return Internal::EndPerformDelayedAction(context, inst_id);
|
|
}
|
|
|
|
} // namespace Carbon::Check
|
|
|
|
#endif // CARBON_TOOLCHAIN_CHECK_ACTION_H_
|