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62c44126b6
- Introduce ide::CompletionInstance to manage CompilerInstance - `CompletionInstance` vends the cached CompilerInstance when: -- The compiler arguments (i.e. CompilerInvocation) has has not changed -- The primary file is the same -- The completion happens inside function bodies in both previous and current completion -- The interface hash of the primary file has not changed - Otherwise, it vends a fresh CompilerInstance and cache it for the next completion rdar://problem/20787086
70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
//===--- LocalContext.h - Parser state across a local context ---*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the LocalContext class, which holds state
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// required by the parser for parsing statements and expressions.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_PARSE_LOCALCONTEXT_H
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#define SWIFT_PARSE_LOCALCONTEXT_H
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#include "llvm/ADT/DenseMap.h"
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#include "swift/AST/Identifier.h"
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#include <cassert>
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namespace swift {
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class Identifier;
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/// Information associated with parsing a local context.
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class LocalContext {
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/// A map holding the next discriminator for declarations with
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/// various identifiers.
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llvm::DenseMap<Identifier, unsigned> LocalDiscriminators;
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/// The next discriminator for an explicit closure expression.
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unsigned NextClosureDiscriminator = 0;
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LocalContext(const LocalContext &) = delete;
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LocalContext &operator=(const LocalContext &) = delete;
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public:
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LocalContext() = default;
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/// Return a number that'll be unique in this context across all
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/// declarations with the given name.
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unsigned claimNextNamedDiscriminator(Identifier name) {
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assert(!name.empty() &&
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"setting a local discriminator on an anonymous decl; "
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"maybe the name hasn't been set yet?");
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return LocalDiscriminators[name]++;
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}
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/// Return a number that'll be unique in this context across all
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/// explicit anonymous closure expressions.
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unsigned claimNextClosureDiscriminator() {
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return NextClosureDiscriminator++;
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}
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/// True if we saw any anonymous closures. This is useful when
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/// parsing an initializer context, because such contexts only
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/// need to exist if the initializer contains closures.
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bool hasClosures() const { return NextClosureDiscriminator != 0; }
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};
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/// Information associated with parsing the top-level context.
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class TopLevelContext : public LocalContext {};
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} // end namespace swift
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#endif
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