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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.
90 lines
2.5 KiB
C++
90 lines
2.5 KiB
C++
//===--- InstrumenterSupport.h - Instrumenter Support -----------*- 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 implements the supporting functions for writing instrumenters of
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// the Swift AST.
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//
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//===----------------------------------------------------------------------===//
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#include "TypeChecker.h"
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namespace swift {
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namespace instrumenter_support {
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template <class E> class Added {
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private:
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E Contents;
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public:
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Added() {}
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Added(E NewContents) { Contents = NewContents; }
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const Added<E> &operator=(const Added<E> &rhs) {
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Contents = rhs.Contents;
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return *this;
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}
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E &operator*() { return Contents; }
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E &operator->() { return Contents; }
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};
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class InstrumenterBase {
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protected:
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InstrumenterBase() : CF(*this) {}
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virtual ~InstrumenterBase() = default;
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virtual void anchor();
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virtual BraceStmt *transformBraceStmt(BraceStmt *BS,
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bool TopLevel = false) = 0;
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class ClosureFinder : public ASTWalker {
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private:
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InstrumenterBase &I;
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public:
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ClosureFinder(InstrumenterBase &Inst) : I(Inst) {}
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std::pair<bool, Stmt *> walkToStmtPre(Stmt *S) override {
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if (isa<BraceStmt>(S)) {
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return {false, S}; // don't walk into brace statements; we
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// need to respect nesting!
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} else {
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return {true, S};
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}
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}
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std::pair<bool, Expr *> walkToExprPre(Expr *E) override {
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if (auto *CE = dyn_cast<ClosureExpr>(E)) {
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BraceStmt *B = CE->getBody();
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if (B) {
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BraceStmt *NB = I.transformBraceStmt(B);
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CE->setBody(NB, false);
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// just with the entry and exit logging this is going to
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// be more than a single expression!
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}
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}
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return {true, E};
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}
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};
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ClosureFinder CF;
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template <class T>
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bool doTypeCheck(ASTContext &Ctx, DeclContext *DC, Added<T *> &parsedExpr) {
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Expr *E = *parsedExpr;
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bool result = doTypeCheckImpl(Ctx, DC, E);
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parsedExpr = Added<T *>(dyn_cast<T>(E));
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return result;
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}
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private:
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bool doTypeCheckImpl(ASTContext &Ctx, DeclContext *DC, Expr * &parsedExpr);
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};
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}
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}
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