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Jon Ross-Perkins
77385aa344
This echoes #2818 and the philosophy is mostly covered there. Versus parsing, semantics uses fewer separate handler files (for now) because the logic has been shorter. However, the design is still intended to make it easy to split files along boundaries similar to the parser, as I've done for a couple more complex/inter-related sections.
69 lines
2.6 KiB
C++
69 lines
2.6 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 "toolchain/semantics/semantics_context.h"
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namespace Carbon {
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auto SemanticsHandleCallExpression(SemanticsContext& context,
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ParseTree::Node parse_node) -> bool {
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auto [ir_id, refs_id] = context.ParamOrArgEnd(
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/*for_args=*/true, ParseNodeKind::CallExpressionStart);
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// TODO: Convert to call expression.
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auto [call_expr_parse_node, name_id] =
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context.node_stack().PopForParseNodeAndNodeId(
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ParseNodeKind::CallExpressionStart);
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auto name_node = context.semantics().GetNode(name_id);
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if (name_node.kind() != SemanticsNodeKind::FunctionDeclaration) {
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// TODO: Work on error.
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context.TODO(parse_node, "Not a callable name");
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context.node_stack().Push(parse_node, name_id);
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return true;
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}
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auto [_, callable_id] = name_node.GetAsFunctionDeclaration();
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auto callable = context.semantics().GetCallable(callable_id);
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CARBON_DIAGNOSTIC(NoMatchingCall, Error, "No matching callable was found.");
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auto diagnostic =
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context.emitter().Build(call_expr_parse_node, NoMatchingCall);
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if (!context.ImplicitAsForArgs(ir_id, refs_id, name_node.parse_node(),
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callable.param_refs_id, &diagnostic)) {
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diagnostic.Emit();
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context.node_stack().Push(parse_node, SemanticsNodeId::BuiltinInvalidType);
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return true;
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}
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CARBON_CHECK(context.ImplicitAsForArgs(ir_id, refs_id, name_node.parse_node(),
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callable.param_refs_id,
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/*diagnostic=*/nullptr));
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auto call_id = context.semantics().AddCall({ir_id, refs_id});
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// TODO: Propagate return types from callable.
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auto call_node_id = context.AddNode(SemanticsNode::Call::Make(
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call_expr_parse_node, callable.return_type_id, call_id, callable_id));
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context.node_stack().Push(parse_node, call_node_id);
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return true;
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}
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auto SemanticsHandleCallExpressionComma(SemanticsContext& context,
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ParseTree::Node /*parse_node*/)
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-> bool {
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context.ParamOrArgComma(/*for_args=*/true);
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return true;
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}
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auto SemanticsHandleCallExpressionStart(SemanticsContext& context,
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ParseTree::Node parse_node) -> bool {
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auto name_id =
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context.node_stack().PopForNodeId(ParseNodeKind::NameReference);
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context.node_stack().Push(parse_node, name_id);
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context.ParamOrArgStart();
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return true;
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}
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} // namespace Carbon
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