mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-11-15 21:08:10 +00:00
Richard Smith
1ae5fe0cd5
Track the callee expression in full, instead of only tracking the callee's FunctionId. This results in the `name_reference` denoting the function actually being used. Lowering now propagates a `llvm::Function*` as the value associated with expressions of type `<function>`. We were not creating `NameReference` node for names produced by member access into a namespace, such as the second name in `Namespace.Function`, which caused lowering of calls to such names to fail. This is now fixed, but the resulting `NameReference` node only refers to the name and the lookup result, not to the `Namespace.` qualifier. We'll need to decide how to fit a third operand into that node (perhaps we can stop storing the `name_id`, since it can be derived from the lookup result) but for now the qualifier is not tracked.
81 lines
2.9 KiB
C++
81 lines
2.9 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
|
|
|
|
#include "toolchain/check/context.h"
|
|
#include "toolchain/check/convert.h"
|
|
#include "toolchain/sem_ir/node.h"
|
|
|
|
namespace Carbon::Check {
|
|
|
|
auto HandleCallExpression(Context& context, Parse::Node parse_node) -> bool {
|
|
// Process the final explicit call argument, but leave the arguments block on
|
|
// the stack until we add the return slot argument.
|
|
context.ParamOrArgEndNoPop(Parse::NodeKind::CallExpressionStart);
|
|
|
|
// TODO: Convert to call expression.
|
|
auto [call_expr_parse_node, callee_id] =
|
|
context.node_stack()
|
|
.PopWithParseNode<Parse::NodeKind::CallExpressionStart>();
|
|
auto callee_node =
|
|
context.semantics_ir().GetNode(context.FollowNameReferences(callee_id));
|
|
auto function_name = callee_node.TryAs<SemIR::FunctionDeclaration>();
|
|
if (!function_name) {
|
|
// TODO: Work on error.
|
|
context.TODO(parse_node, "Not a callable name");
|
|
context.node_stack().Push(parse_node, callee_id);
|
|
context.ParamOrArgPop();
|
|
return true;
|
|
}
|
|
|
|
auto function_id = function_name->function_id;
|
|
const auto& callable = context.semantics_ir().GetFunction(function_id);
|
|
|
|
// For functions with an implicit return type, the return type is the empty
|
|
// tuple type.
|
|
SemIR::TypeId type_id = callable.return_type_id;
|
|
if (!type_id.is_valid()) {
|
|
type_id = context.CanonicalizeTupleType(call_expr_parse_node, {});
|
|
}
|
|
|
|
// If there is a return slot, add a corresponding argument.
|
|
if (callable.return_slot_id.is_valid()) {
|
|
// Tentatively put storage for a temporary in the function's return slot.
|
|
// This will be replaced if necessary when we perform initialization.
|
|
auto temp_id = context.AddNode(
|
|
SemIR::TemporaryStorage(call_expr_parse_node, callable.return_type_id));
|
|
context.ParamOrArgSave(temp_id);
|
|
}
|
|
|
|
// Convert the arguments to match the parameters.
|
|
auto refs_id = context.ParamOrArgPop();
|
|
if (!ConvertCallArgs(context, call_expr_parse_node, refs_id,
|
|
callee_node.parse_node(), callable.param_refs_id,
|
|
callable.return_slot_id.is_valid())) {
|
|
context.node_stack().Push(parse_node, SemIR::NodeId::BuiltinError);
|
|
return true;
|
|
}
|
|
|
|
auto call_node_id = context.AddNode(
|
|
SemIR::Call(call_expr_parse_node, type_id, callee_id, refs_id));
|
|
|
|
context.node_stack().Push(parse_node, call_node_id);
|
|
return true;
|
|
}
|
|
|
|
auto HandleCallExpressionComma(Context& context, Parse::Node /*parse_node*/)
|
|
-> bool {
|
|
context.ParamOrArgComma();
|
|
return true;
|
|
}
|
|
|
|
auto HandleCallExpressionStart(Context& context, Parse::Node parse_node)
|
|
-> bool {
|
|
auto name_id = context.node_stack().PopExpression();
|
|
context.node_stack().Push(parse_node, name_id);
|
|
context.ParamOrArgStart();
|
|
return true;
|
|
}
|
|
|
|
} // namespace Carbon::Check
|