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492f5cd35a
Replace `NameOfType foo = dyn_cast<NameOfType>(bar)` with DRY version `auto foo = dyn_cast<NameOfType>(bar)`. The DRY auto version is by far the dominant form already used in the repo, so this PR merely brings the exceptional cases (redundant repetition form) in line with the dominant form (auto form). See the [C++ Core Guidelines](https://github.com/isocpp/CppCoreGuidelines/blob/master/CppCoreGuidelines.md#es11-use-auto-to-avoid-redundant-repetition-of-type-names) for a general discussion on why to use `auto` to avoid redundant repetition of type names.
100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
//===--- ASTNode.cpp - Swift Language ASTs --------------------------------===//
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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 implements the ASTNode, which is a union of Stmt, Expr, and Decl.
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//
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//===----------------------------------------------------------------------===//
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#include "swift/AST/ASTNode.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/Expr.h"
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#include "swift/AST/Stmt.h"
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#include "swift/Basic/SourceLoc.h"
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using namespace swift;
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SourceRange ASTNode::getSourceRange() const {
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if (const auto *E = this->dyn_cast<Expr*>())
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return E->getSourceRange();
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if (const auto *S = this->dyn_cast<Stmt*>())
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return S->getSourceRange();
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if (const auto *D = this->dyn_cast<Decl*>())
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return D->getSourceRange();
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llvm_unreachable("unsupported AST node");
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}
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/// \brief Return the location of the start of the statement.
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SourceLoc ASTNode::getStartLoc() const {
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return getSourceRange().Start;
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}
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/// \brief Return the location of the end of the statement.
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SourceLoc ASTNode::getEndLoc() const {
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return getSourceRange().End;
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}
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DeclContext *ASTNode::getAsDeclContext() const {
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if (auto *E = this->dyn_cast<Expr*>()) {
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if (isa<AbstractClosureExpr>(E))
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return static_cast<AbstractClosureExpr*>(E);
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} else if (is<Stmt*>()) {
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return nullptr;
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} else if (auto *D = this->dyn_cast<Decl*>()) {
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if (isa<DeclContext>(D))
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return cast<DeclContext>(D);
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} else if (getOpaqueValue())
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llvm_unreachable("unsupported AST node");
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return nullptr;
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}
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bool ASTNode::isImplicit() const {
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if (const auto *E = this->dyn_cast<Expr*>())
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return E->isImplicit();
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if (const auto *S = this->dyn_cast<Stmt*>())
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return S->isImplicit();
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if (const auto *D = this->dyn_cast<Decl*>())
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return D->isImplicit();
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llvm_unreachable("unsupported AST node");
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}
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void ASTNode::walk(ASTWalker &Walker) {
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if (auto *E = this->dyn_cast<Expr*>())
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E->walk(Walker);
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else if (auto *S = this->dyn_cast<Stmt*>())
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S->walk(Walker);
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else if (auto *D = this->dyn_cast<Decl*>())
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D->walk(Walker);
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else
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llvm_unreachable("unsupported AST node");
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}
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void ASTNode::walk(SourceEntityWalker &Walker) {
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if (auto *E = this->dyn_cast<Expr*>())
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Walker.walk(E);
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else if (auto *S = this->dyn_cast<Stmt*>())
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Walker.walk(S);
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else if (auto *D = this->dyn_cast<Decl*>())
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Walker.walk(D);
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else
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llvm_unreachable("unsupported AST node");
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}
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#define FUNC(T) \
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bool ASTNode::is##T(T##Kind Kind) const { \
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if (!is<T*>()) \
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return false; \
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return get<T*>()->getKind() == Kind; \
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}
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FUNC(Stmt)
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FUNC(Expr)
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FUNC(Decl)
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#undef FUNC
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