mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-04 06:51:03 +01:00
Richard Smith
6b28213b36
Expose C++ class templates, variable templates, alias templates, and concepts as callable values in Carbon, and map calls to them into template-id formation, mirroring how Carbon generics behave. For now, only type template parameters are supported; non-type and template template parameters produce a TODO error.
47 lines
2.0 KiB
C++
47 lines
2.0 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 CARBON_TOOLCHAIN_CHECK_CPP_CALL_H_
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#define CARBON_TOOLCHAIN_CHECK_CPP_CALL_H_
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#include "toolchain/check/context.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::Check {
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// Checks and builds SemIR for a call to a C++ function in the given overload
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// set with self `self_id` and arguments `arg_ids`.
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//
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// Chooses the best viable C++ function by performing Clang overloading
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// resolution over the overload set.
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//
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// Preserves the given self, if set. If not set, and the function is a C++
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// member operator, self will be set to the first argument, which in turn will
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// be removed from the given args.
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//
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// A set with a single non-templated function goes through the same rules for
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// overloading resolution. This is to make sure that calls that have no viable
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// implicit conversion sequence are rejected even when an implicit conversion is
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// possible. Keeping the same behavior here for consistency and supporting
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// migrations so that the migrated callers from C++ remain valid.
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auto PerformCallToCppFunction(Context& context, SemIR::LocId loc_id,
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SemIR::CppOverloadSetId overload_set_id,
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SemIR::InstId self_id,
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llvm::ArrayRef<SemIR::InstId> arg_ids)
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-> SemIR::InstId;
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// Checks and builds SemIR for a call to a C++ template name with arguments
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// `arg_ids`.
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//
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// Converts the arguments to a C++ template argument list and attempts to
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// instantiate a template specialization and import a declaration of it.
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auto PerformCallToCppTemplateName(Context& context, SemIR::LocId loc_id,
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SemIR::ClangDeclId template_decl_id,
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llvm::ArrayRef<SemIR::InstId> arg_ids)
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-> SemIR::InstId;
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_CPP_CALL_H_
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