//===--- Syntax.cpp - Swift Syntax Implementation -------------------------===//
//
// 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/Syntax/Syntax.h"
#include "swift/Syntax/SyntaxData.h"
#include "swift/Syntax/SyntaxVisitor.h"
#include "swift/Syntax/TokenSyntax.h"

using namespace swift;
using namespace swift::syntax;

const RC<RawSyntax> &Syntax::getRaw() const {
  return Data->getRaw();
}

SyntaxKind Syntax::getKind() const {
  return getRaw()->getKind();
}

void Syntax::print(llvm::raw_ostream &OS, SyntaxPrintOptions Opts) const {
  if (auto Raw = getRaw())
    Raw->print(OS, Opts);
}

void Syntax::dump() const {
  getRaw()->dump();
}

void Syntax::dump(llvm::raw_ostream &OS, unsigned Indent) const {
  getRaw()->dump(OS, 0);
}

bool Syntax::isType() const {
  return Data->isType();
}

bool Syntax::isDecl() const {
  return Data->isDecl();
}

bool Syntax::isStmt() const {
  return Data->isStmt();
}

bool Syntax::isExpr() const {
  return Data->isExpr();
}

bool Syntax::isToken() const {
  return getRaw()->isToken();
}

bool Syntax::isPattern() const {
  return Data->isPattern();
}

bool Syntax::isUnknown() const {
  return Data->isUnknown();
}

bool Syntax::isPresent() const {
  return getRaw()->isPresent();
}

bool Syntax::isMissing() const {
  return getRaw()->isMissing();
}

llvm::Optional<Syntax> Syntax::getParent() const {
  auto ParentData = getData().getParent();
  if (!ParentData) return llvm::None;
  return llvm::Optional<Syntax> {
    Syntax { Root, ParentData }
  };
}

Syntax Syntax::getRoot() const {
  return { Root, Root.get() };
}

size_t Syntax::getNumChildren() const {
  return Data->getNumChildren();
}

llvm::Optional<Syntax> Syntax::getChild(const size_t N) const {
  auto ChildData = Data->getChild(N);
  if (!ChildData)
    return llvm::None;
  return Syntax {Root, ChildData.get()};
}

Optional<Syntax> Syntax::getPreviousNode() const {
  if (auto prev = getData().getPreviousNode())
    return Syntax(Root, prev.get());
  return None;
}

Optional<TokenSyntax> Syntax::getFirstToken() const {
  if (auto tok = getData().getFirstToken())
    return TokenSyntax(Root, tok.get());
  return None;
}

Optional<TokenSyntax> Syntax::getLastToken() const {
  if (auto tok = getData().getLastToken())
    return TokenSyntax(Root, tok.get());
  return None;
}