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162b2d252e
A lot of files transitively include Expr.h, because it was included from SILInstruction.h, SILLocation.h and SILDeclRef.h. However in reality most of these files don't do anything with Exprs, especially not anything in IRGen or the SILOptimizer. Now we're down to 171 files in the frontend which depend on Expr.h, which is still a lot but much better than before.
114 lines
3.9 KiB
C++
114 lines
3.9 KiB
C++
//===--- DerivedConformanceError.cpp - Derived Error ----------------------===//
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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 implicit derivation of the Error
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// protocol.
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//
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//===----------------------------------------------------------------------===//
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#include "TypeChecker.h"
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#include "DerivedConformances.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/Stmt.h"
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#include "swift/AST/Expr.h"
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#include "swift/AST/Module.h"
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#include "swift/AST/Types.h"
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using namespace swift;
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using namespace DerivedConformance;
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static void deriveBodyBridgedNSError_enum_nsErrorDomain(
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AbstractFunctionDecl *domainDecl) {
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// enum SomeEnum {
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// @derived
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// static var _nsErrorDomain: String {
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// return "ModuleName.SomeEnum"
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// }
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// }
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auto M = domainDecl->getParentModule();
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auto &C = M->getASTContext();
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auto TC = domainDecl->getInnermostTypeContext();
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auto ED = TC->getAsEnumOrEnumExtensionContext();
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std::string buffer = M->getNameStr();
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buffer += ".";
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buffer += ED->getNameStr();
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StringRef value(C.AllocateCopy(buffer));
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auto string = new (C) StringLiteralExpr(value, SourceRange(), /*implicit*/ true);
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auto ret = new (C) ReturnStmt(SourceLoc(), string, /*implicit*/ true);
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auto body = BraceStmt::create(C, SourceLoc(),
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ASTNode(ret),
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SourceLoc());
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domainDecl->setBody(body);
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}
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static ValueDecl *deriveBridgedNSError_enum_nsErrorDomain(TypeChecker &tc,
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Decl *parentDecl,
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EnumDecl *enumDecl) {
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// enum SomeEnum {
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// @derived
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// static var _nsErrorDomain: String {
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// return "\(self)"
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// }
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// }
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// Note that for @objc enums the format is assumed to be "MyModule.SomeEnum".
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// If this changes, please change PrintAsObjC as well.
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ASTContext &C = tc.Context;
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auto stringTy = C.getStringDecl()->getDeclaredType();
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// Define the getter.
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auto getterDecl = declareDerivedPropertyGetter(tc, parentDecl, enumDecl,
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stringTy, stringTy,
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/*isStatic=*/true,
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/*isFinal=*/true);
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getterDecl->setBodySynthesizer(&deriveBodyBridgedNSError_enum_nsErrorDomain);
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// Define the property.
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VarDecl *propDecl;
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PatternBindingDecl *pbDecl;
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std::tie(propDecl, pbDecl)
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= declareDerivedReadOnlyProperty(tc, parentDecl, enumDecl,
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C.Id_nsErrorDomain,
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stringTy, stringTy,
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getterDecl, /*isStatic=*/true,
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/*isFinal=*/true);
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auto dc = cast<IterableDeclContext>(parentDecl);
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dc->addMember(getterDecl);
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dc->addMember(propDecl);
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dc->addMember(pbDecl);
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return propDecl;
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}
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ValueDecl *DerivedConformance::deriveBridgedNSError(TypeChecker &tc,
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Decl *parentDecl,
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NominalTypeDecl *type,
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ValueDecl *requirement) {
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if (!isa<EnumDecl>(type))
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return nullptr;
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auto enumType = cast<EnumDecl>(type);
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if (requirement->getName() == tc.Context.Id_nsErrorDomain)
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return deriveBridgedNSError_enum_nsErrorDomain(tc, parentDecl, enumType);
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tc.diagnose(requirement->getLoc(),
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diag::broken_errortype_requirement);
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return nullptr;
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}
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