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105 lines
3.2 KiB
C++
105 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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/// 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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/// 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::dump(raw_ostream &OS, unsigned Indent) const {
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if (auto S = dyn_cast<Stmt*>())
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S->dump(OS, /*context=*/nullptr, Indent);
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else if (auto E = dyn_cast<Expr*>())
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E->dump(OS, Indent);
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else if (auto D = dyn_cast<Decl*>())
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D->dump(OS, Indent);
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else
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OS << "<null>";
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}
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void ASTNode::dump() const {
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dump(llvm::errs());
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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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