mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Adrien Leravat
0cb2c92c6c
Features * Support addressing positional members (i.e. tuple fields) using an index. * Addresses a couple of `TODO`s relative to positional members Changes: * Add a new `IndexedValue` mirroring `NamedValue` * Adds `FieldPath::index() -> int` * Adds a `Member` variant for `IndexedValue`
79 lines
2.3 KiB
C++
79 lines
2.3 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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#include "explorer/ast/member.h"
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#include "common/check.h"
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#include "explorer/ast/declaration.h"
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namespace Carbon {
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Member::Member(Nonnull<const Declaration*> declaration)
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: member_(declaration) {}
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Member::Member(Nonnull<const NamedValue*> struct_member)
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: member_(struct_member) {}
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Member::Member(Nonnull<const IndexedValue*> tuple_member)
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: member_(tuple_member) {}
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auto Member::IsNamed(std::string_view other_name) const -> bool {
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return HasName() && name() == other_name;
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}
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auto Member::name() const -> std::string_view {
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CARBON_CHECK(HasName()) << "Unnamed member does not have a name()";
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if (const auto* decl = member_.dyn_cast<const Declaration*>()) {
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return GetName(*decl).value();
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} else if (const auto* named_valued = member_.dyn_cast<const NamedValue*>()) {
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return named_valued->name;
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} else {
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CARBON_FATAL() << "Unreachable";
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}
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}
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auto Member::HasPosition() const -> bool {
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return member_.dyn_cast<const IndexedValue*>() != nullptr;
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}
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auto Member::HasName() const -> bool {
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// Both are currently mutually exclusive
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return !HasPosition();
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}
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auto Member::index() const -> int {
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CARBON_CHECK(HasPosition())
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<< "Non-positional member does not have an index()";
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return member_.dyn_cast<const IndexedValue*>()->index;
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}
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auto Member::type() const -> const Value& {
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if (const auto* decl = member_.dyn_cast<const Declaration*>()) {
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return decl->static_type();
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} else if (const auto* named_valued = member_.dyn_cast<const NamedValue*>()) {
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return *named_valued->value;
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} else {
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return *member_.get<const IndexedValue*>()->value;
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}
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}
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auto Member::declaration() const -> std::optional<Nonnull<const Declaration*>> {
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if (const auto* decl = member_.dyn_cast<const Declaration*>()) {
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return decl;
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}
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return std::nullopt;
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}
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void Member::Print(llvm::raw_ostream& out) const {
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if (HasName()) {
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out << name();
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} else if (const auto* value = member_.dyn_cast<const IndexedValue*>()) {
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out << "element #" << member_.get<const IndexedValue*>()->index;
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} else {
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CARBON_FATAL() << "Unhandled member type";
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}
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}
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} // namespace Carbon
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