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//===--- Effects.cpp - Effect Checking ASTs -------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// This file implements some logic for rethrows and reasync checking.
//
//===----------------------------------------------------------------------===//
#include "swift/AST/ASTContext.h"
#include "swift/AST/Effects.h"
#include "swift/AST/Evaluator.h"
#include "swift/AST/Decl.h"
#include "swift/AST/ProtocolConformanceRef.h"
#include "swift/AST/Type.h"
#include "swift/AST/Types.h"
#include "swift/AST/TypeCheckRequests.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/Support/raw_ostream.h"
using namespace swift;
bool AnyFunctionType::hasEffect(EffectKind kind) const {
switch (kind) {
case EffectKind::Throws: return getExtInfo().isThrowing();
case EffectKind::Async: return getExtInfo().isAsync();
}
llvm_unreachable("Bad effect kind");
}
void swift::simple_display(llvm::raw_ostream &out, const EffectKind kind) {
switch (kind) {
case EffectKind::Throws: out << "throws"; return;
case EffectKind::Async: out << "async"; return;
}
llvm_unreachable("Bad effect kind");
}
void swift::simple_display(llvm::raw_ostream &out,
const PolymorphicEffectRequirementList list) {
for (auto req : list.getRequirements()) {
simple_display(out, req);
out << "\n";
}
for (auto conf : list.getConformances()) {
simple_display(out, conf.first);
out << " : ";
simple_display(out, conf.second);
llvm::errs() << "\n";
}
}
PolymorphicEffectRequirementList
ProtocolDecl::getPolymorphicEffectRequirements(EffectKind kind) const {
return evaluateOrDefault(getASTContext().evaluator,
PolymorphicEffectRequirementsRequest{kind, const_cast<ProtocolDecl *>(this)},
PolymorphicEffectRequirementList());
}
bool ProtocolDecl::hasPolymorphicEffect(EffectKind kind) const {
switch (kind) {
case EffectKind::Throws:
return getAttrs().hasAttribute<swift::AtRethrowsAttr>();
case EffectKind::Async:
return getAttrs().hasAttribute<swift::AtReasyncAttr>();
}
llvm_unreachable("Bad effect kind");
}
bool AbstractFunctionDecl::hasEffect(EffectKind kind) const {
switch (kind) {
case EffectKind::Throws:
return hasThrows();
case EffectKind::Async:
return hasAsync();
}
llvm_unreachable("Bad effect kind");
}
bool AbstractFunctionDecl::hasPolymorphicEffect(EffectKind kind) const {
switch (kind) {
case EffectKind::Throws:
return getAttrs().hasAttribute<swift::RethrowsAttr>();
case EffectKind::Async:
return getAttrs().hasAttribute<swift::ReasyncAttr>();
}
llvm_unreachable("Bad effect kind");
}
PolymorphicEffectKind
AbstractFunctionDecl::getPolymorphicEffectKind(EffectKind kind) const {
return evaluateOrDefault(getASTContext().evaluator,
PolymorphicEffectKindRequest{kind, const_cast<AbstractFunctionDecl *>(this)},
PolymorphicEffectKind::Invalid);
}
void swift::simple_display(llvm::raw_ostream &out,
PolymorphicEffectKind kind) {
switch (kind) {
case PolymorphicEffectKind::None:
out << "none";
break;
case PolymorphicEffectKind::ByClosure:
out << "by closure";
break;
case PolymorphicEffectKind::ByConformance:
out << "by conformance";
break;
case PolymorphicEffectKind::AsyncSequenceRethrows:
out << "by async sequence implicit @rethrows";
break;
case PolymorphicEffectKind::Always:
out << "always";
break;
case PolymorphicEffectKind::Invalid:
out << "invalid";
break;
}
}
bool ProtocolConformanceRef::hasEffect(EffectKind kind) const {
if (!isConcrete()) { return true; }
return evaluateOrDefault(getRequirement()->getASTContext().evaluator,
ConformanceHasEffectRequest{kind, getConcrete()},
true);
}
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