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Geoff Romer
09710d102f
This resolves a TODO in `expr_info.cpp` by using the inst kind rather than the bound value to track the binding's category. Since we're churning all the `bind_name` insts in testdata anyway, I'm also taking this opportunity to align the inst naming with the design's terminology, by calling these insts "bindings" (this aspect of the PR is dependent on #6231 resolving an ambiguity in that terminology). For consistency we'll need to rename several other insts as well (see the TODO on `RefBinding`); I'm deferring that to a separate PR to minimize the review load, but I think those name changes are in-scope for this review.
70 lines
3.0 KiB
C++
70 lines
3.0 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_PATTERN_H_
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#define CARBON_TOOLCHAIN_CHECK_PATTERN_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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// Marks the start of a region of insts in a pattern context that might
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// represent an expression or a pattern. Typically this is called when
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// handling a parse node that can immediately precede a subpattern (such
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// as `let` or a `,` in a pattern list), and the handler for the subpattern
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// node makes the matching `EndSubpatternAs*` call.
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auto BeginSubpattern(Context& context) -> void;
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// Ends a region started by BeginSubpattern (in stack order), treating it as
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// an expression with the given result, and returns the ID of the region. The
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// region will not yet have any control-flow edges into or out of it.
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auto EndSubpatternAsExpr(Context& context, SemIR::InstId result_id)
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-> SemIR::ExprRegionId;
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// Ends a region started by BeginSubpattern (in stack order), asserting that
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// it had no expression content.
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auto EndSubpatternAsNonExpr(Context& context) -> void;
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// Information about a created binding pattern.
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struct BindingPatternInfo {
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SemIR::InstId pattern_id;
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SemIR::InstId bind_id;
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};
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// TODO: Add EndSubpatternAsPattern, when needed.
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// Creates a binding pattern. Returns the binding pattern and the bind name
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// instruction.
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// TODO: remove is_template once we have a separate InstKind for template
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// bindings.
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auto AddBindingPattern(Context& context, SemIR::LocId name_loc,
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SemIR::NameId name_id, SemIR::TypeId type_id,
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SemIR::ExprRegionId type_region_id,
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SemIR::InstKind pattern_kind, bool is_template)
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-> BindingPatternInfo;
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// Creates storage for `var` patterns nested within the given pattern at the
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// current location in the output SemIR. For a `returned var`, this
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// reuses the function's return slot when present.
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auto AddPatternVarStorage(Context& context, SemIR::InstBlockId pattern_block_id,
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bool is_returned_var) -> void;
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// Adds a `self` parameter pattern with the specified type information. This
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// only sets up the binding pattern and type; callers are expected to add the
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// returned instruction to appropriate blocks. This is used when generating
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// functions, rather than processing a user-authored `self: Self`.
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auto AddSelfParamPattern(Context& context, SemIR::LocId loc_id,
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SemIR::ExprRegionId type_expr_region_id,
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SemIR::TypeId type_id) -> SemIR::InstId;
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// As the above, but for `addr self: Self*`.
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auto AddAddrSelfParamPattern(Context& context, SemIR::LocId loc_id,
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SemIR::ExprRegionId type_expr_region_id,
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SemIR::TypeInstId type_inst_id) -> SemIR::InstId;
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_PATTERN_H_
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