58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
// Copyright (c) 2020-now by the Zeek Project. See LICENSE for details.
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#pragma once
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#include <memory>
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#include <utility>
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#include <hilti/ast/ctor.h>
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#include <hilti/ast/expression.h>
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#include <hilti/ast/type.h>
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#include <hilti/ast/types/auto.h>
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#include <hilti/ast/types/optional.h>
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namespace hilti::ctor {
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/** AST node for a `optional` ctor. */
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class Optional : public Ctor {
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public:
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Expression* value() const { return child<Expression>(1); }
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QualifiedType* dereferencedType() const { return type()->type()->as<type::Optional>()->dereferencedType(); }
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QualifiedType* type() const final {
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if ( auto e = child<QualifiedType>(0) )
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return e;
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else
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return child<Expression>(1)->type();
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}
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void setType(ASTContext* ctx, QualifiedType* t) { setChild(ctx, 0, t); }
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/** Constructs a set value. */
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static auto create(ASTContext* ctx, Expression* expr, const Meta& meta = {}) {
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return ctx->make<Optional>(ctx,
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{
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QualifiedType::create(ctx, type::Auto::create(ctx), Constness::Const),
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expr,
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},
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meta);
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}
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/** Constructs an unset value of type `t`. */
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static auto create(ASTContext* ctx, QualifiedType* type, const Meta& meta = {}) {
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return ctx->make<Optional>(ctx,
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{
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QualifiedType::create(ctx, type::Optional::create(ctx, type), Constness::Const),
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nullptr,
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},
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meta);
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}
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protected:
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Optional(ASTContext* ctx, Nodes children, Meta meta) : Ctor(ctx, NodeTags, std::move(children), std::move(meta)) {}
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HILTI_NODE_1(ctor::Optional, Ctor, final);
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};
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} // namespace hilti::ctor
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