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//===--- DeclarationFragmentPrinter.cpp - Declaration Fragment Printer ----===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 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
//
//===----------------------------------------------------------------------===//
#include "swift/AST/USRGeneration.h"
#include "swift/Parse/Token.h"
#include "DeclarationFragmentPrinter.h"
#include "SymbolGraphASTWalker.h"
using namespace swift;
using namespace symbolgraphgen;
void DeclarationFragmentPrinter::openFragment(FragmentKind Kind) {
assert(Kind != FragmentKind::None);
if (this->Kind != Kind) {
closeFragment();
this->Kind = Kind,
Spelling.clear();
USR.clear();
}
}
StringRef
DeclarationFragmentPrinter::getKindSpelling(FragmentKind Kind) const {
switch (Kind) {
case FragmentKind::Keyword:
return "keyword";
case FragmentKind::Attribute:
return "attribute";
case FragmentKind::NumberLiteral:
return "number";
case FragmentKind::StringLiteral:
return "string";
case FragmentKind::Identifier:
return "identifier";
case FragmentKind::TypeIdentifier:
return "typeIdentifier";
case FragmentKind::GenericParameter:
return "genericParameter";
case FragmentKind::InternalParam:
return "internalParam";
case FragmentKind::ExternalParam:
return "externalParam";
case FragmentKind::Text:
return "text";
case FragmentKind::None:
llvm_unreachable("Fragment kind of 'None' has no spelling");
}
llvm_unreachable("invalid fragment kind");
}
void DeclarationFragmentPrinter::closeFragment() {
if (Kind == FragmentKind::None) {
return;
}
++NumFragments;
if (!Spelling.empty()) {
OS.object([&](){
OS.attribute("kind", getKindSpelling(Kind));
OS.attribute("spelling", Spelling.str());
if (!USR.empty()) {
OS.attribute("preciseIdentifier", USR.str());
}
});
}
Spelling.clear();
USR.clear();
Kind = FragmentKind::None;
}
void DeclarationFragmentPrinter::printDeclLoc(const Decl *D) {
switch (D->getKind()) {
case DeclKind::Constructor:
case DeclKind::Destructor:
case DeclKind::Subscript:
openFragment(FragmentKind::Keyword);
break;
default:
openFragment(FragmentKind::Identifier);
break;
}
}
void
DeclarationFragmentPrinter::printNamePre(PrintNameContext Context) {
switch (Context) {
case PrintNameContext::Keyword:
case PrintNameContext::IntroducerKeyword:
openFragment(FragmentKind::Keyword);
break;
case PrintNameContext::GenericParameter:
openFragment(FragmentKind::GenericParameter);
break;
case PrintNameContext::Attribute:
openFragment(FragmentKind::Attribute);
break;
case PrintNameContext::ClassDynamicSelf:
case PrintNameContext::FunctionParameterExternal:
openFragment(FragmentKind::ExternalParam);
break;
case PrintNameContext::FunctionParameterLocal:
openFragment(FragmentKind::InternalParam);
break;
case PrintNameContext::TupleElement:
case PrintNameContext::TypeMember:
case PrintNameContext::Normal:
break;
}
}
void DeclarationFragmentPrinter::printStructurePre(PrintStructureKind Kind,
const Decl *D) {
switch (Kind) {
case PrintStructureKind::NumberLiteral:
openFragment(FragmentKind::NumberLiteral);
break;
case PrintStructureKind::StringLiteral:
openFragment(FragmentKind::StringLiteral);
break;
default:
break;
}
}
void DeclarationFragmentPrinter::printTypeRef(Type T, const TypeDecl *RefTo,
Identifier Name,
PrintNameContext NameContext) {
if (Kind != FragmentKind::Attribute) {
openFragment(FragmentKind::TypeIdentifier);
} else {
// create a separate fragment so that only the attribute name is linkable
closeFragment();
openFragment(FragmentKind::Attribute);
}
printText(Name.str());
USR.clear();
auto ShouldLink = Name.str() != "Self";
if (T) {
if (const auto *TD = T->getAnyNominal()) {
if (SG->isImplicitlyPrivate(TD)) {
ShouldLink = false;
}
}
if (T->isTypeParameter() && T->getKind() != TypeKind::DependentMember) {
ShouldLink = false;
}
}
if (ShouldLink) {
llvm::raw_svector_ostream OS(USR);
ide::printDeclUSR(RefTo, OS);
if (ReferencedDecls)
ReferencedDecls->insert(RefTo);
}
closeFragment();
}
void DeclarationFragmentPrinter::printText(StringRef Text) {
if (Kind == FragmentKind::None) {
openFragment(FragmentKind::Text);
}
Spelling.append(Text);
}
void DeclarationFragmentPrinter::printAbridgedType(const GenericTypeDecl *TD,
bool PrintKeyword) {
if (PrintKeyword) {
openFragment(DeclarationFragmentPrinter::FragmentKind::Keyword);
switch (TD->getKind()) {
case DeclKind::Struct:
printText(getTokenText(tok::kw_struct));
break;
case DeclKind::Enum:
printText(getTokenText(tok::kw_enum));
break;
case DeclKind::Protocol:
printText(getTokenText(tok::kw_protocol));
break;
case DeclKind::Class:
printText(getTokenText(tok::kw_class));
break;
case DeclKind::TypeAlias:
printText(getTokenText(tok::kw_typealias));
break;
case DeclKind::OpaqueType:
llvm_unreachable("OpaqueType should not be in symbol graphs!");
default:
llvm_unreachable("GenericTypeDecl kind not handled in DeclarationFragmentPrinter!");
}
openFragment(DeclarationFragmentPrinter::FragmentKind::Text);
printText(" ");
}
openFragment(DeclarationFragmentPrinter::FragmentKind::Identifier);
printText(TD->getNameStr());
}
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