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https://github.com/carbon-language/carbon-lang.git
synced 2026-10-01 17:25:52 +01:00
Nicholas Bishop
773ecdfac6
This adds the `static` token to the lexer and parses it as a modifier. In check, `FullPatternStack::Kind::FieldDecl` is now used for both static and non-static vars. Static vars get treated basically the same as `NameBindingDecl`s. Global initialization is used for static var initializers. To make the necessary stack information available to `pattern_match.cpp`, the `full_pattern_stack` and `decl_introducer_state_stack` are now popped later in `handle_let_and_var.cpp`. In lowering, each class's body is checked for `VarStorage` insts and lowered the same as global vars.
54 lines
1.7 KiB
C++
54 lines
1.7 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_GLOBAL_INIT_H_
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#define CARBON_TOOLCHAIN_CHECK_GLOBAL_INIT_H_
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#include "llvm/ADT/SmallVector.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::Check {
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class Context;
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// Tracks state for global initialization. Handles should `Resume` when entering
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// an expression that's used for global init, and `Suspend` when the expression
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// is finished. Instructions in the middle will be tracked for the
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// `__global_init` function.
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class GlobalInit {
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public:
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explicit GlobalInit(Context* context) : context_(context) {}
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// Resumes adding instructions to global init.
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auto Resume() -> void;
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// Suspends adding instructions to global init.
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auto Suspend() -> void;
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// Finalizes the global initialization state, creating `__global_init` if
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// needed. Only called once at the end of checking.
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auto Finalize() -> void;
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private:
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// The associated context. Stored for convenience.
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Context* context_;
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// The currently suspended global init block. The value may change as a result
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// of control flow in initialization.
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SemIR::InstBlockId block_id_ = SemIR::InstBlockId::GlobalInit;
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// The contents for the currently suspended global init block.
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llvm::SmallVector<SemIR::InstId> block_;
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};
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// Whether to use global initialization for the initializer of a declaration.
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//
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// This returns true for a declaration in package scope, or for a static
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// class field.
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auto UseGlobalInit(Context& context) -> bool;
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} // namespace Carbon::Check
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#endif // CARBON_TOOLCHAIN_CHECK_GLOBAL_INIT_H_
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