151 lines
4.9 KiB
C++
151 lines
4.9 KiB
C++
//------------------------------------------------------------------------------
|
|
// CLING - the C++ LLVM-based InterpreterG :)
|
|
// author: Axel Naumann <axel@cern.ch>
|
|
//
|
|
// This file is dual-licensed: you can choose to license it under the University
|
|
// of Illinois Open Source License or the GNU Lesser General Public License. See
|
|
// LICENSE.TXT for details.
|
|
//------------------------------------------------------------------------------
|
|
|
|
#include "cling/UserInterface/UserInterface.h"
|
|
|
|
#include "cling/Interpreter/Exception.h"
|
|
#include "cling/MetaProcessor/MetaProcessor.h"
|
|
#include "cling/Utils/Output.h"
|
|
#include "textinput/Callbacks.h"
|
|
#include "textinput/TextInput.h"
|
|
#include "textinput/StreamReader.h"
|
|
#include "textinput/TerminalDisplay.h"
|
|
|
|
#include "llvm/ADT/SmallString.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/Path.h"
|
|
#include "llvm/Config/config.h"
|
|
|
|
#include "clang/Basic/LangOptions.h"
|
|
#include "clang/Frontend/CompilerInstance.h"
|
|
|
|
namespace {
|
|
///\brief Class that specialises the textinput TabCompletion to allow Cling
|
|
/// to code complete through its own textinput mechanism which is part of the
|
|
/// UserInterface.
|
|
///
|
|
class UITabCompletion : public textinput::TabCompletion {
|
|
const cling::Interpreter& m_ParentInterpreter;
|
|
|
|
public:
|
|
UITabCompletion(const cling::Interpreter& Parent) :
|
|
m_ParentInterpreter(Parent) {}
|
|
~UITabCompletion() {}
|
|
|
|
bool Complete(textinput::Text& Line /*in+out*/,
|
|
size_t& Cursor /*in+out*/,
|
|
textinput::EditorRange& R /*out*/,
|
|
std::vector<std::string>& Completions /*out*/) override {
|
|
m_ParentInterpreter.codeComplete(Line.GetText(), Cursor, Completions);
|
|
return true;
|
|
}
|
|
};
|
|
}
|
|
|
|
namespace cling {
|
|
|
|
UserInterface::UserInterface(Interpreter& interp) {
|
|
m_MetaProcessor.reset(new MetaProcessor(interp, cling::outs()));
|
|
llvm::install_fatal_error_handler(&CompilationException::throwingHandler);
|
|
}
|
|
|
|
UserInterface::~UserInterface() {}
|
|
|
|
void UserInterface::runInteractively(bool nologo /* = false */) {
|
|
if (!nologo) {
|
|
PrintLogo();
|
|
}
|
|
|
|
llvm::SmallString<512> histfilePath;
|
|
if (!getenv("CLING_NOHISTORY")) {
|
|
// History file is $HOME/.cling_history
|
|
if (llvm::sys::path::home_directory(histfilePath))
|
|
llvm::sys::path::append(histfilePath, ".cling_history");
|
|
}
|
|
|
|
using namespace textinput;
|
|
std::unique_ptr<StreamReader> R(StreamReader::Create());
|
|
std::unique_ptr<TerminalDisplay> D(TerminalDisplay::Create());
|
|
TextInput TI(*R, *D, histfilePath.empty() ? 0 : histfilePath.c_str());
|
|
|
|
// Inform text input about the code complete consumer
|
|
// TextInput owns the TabCompletion.
|
|
UITabCompletion* Completion =
|
|
new UITabCompletion(m_MetaProcessor->getInterpreter());
|
|
TI.SetCompletion(Completion);
|
|
|
|
bool Done = false;
|
|
std::string Line;
|
|
std::string Prompt("[cling]$ ");
|
|
|
|
while (!Done) {
|
|
try {
|
|
m_MetaProcessor->getOuts().flush();
|
|
{
|
|
MetaProcessor::MaybeRedirectOutputRAII RAII(*m_MetaProcessor);
|
|
TI.SetPrompt(Prompt.c_str());
|
|
Done = TI.ReadInput() == TextInput::kRREOF;
|
|
TI.TakeInput(Line);
|
|
if (Done && Line.empty())
|
|
break;
|
|
}
|
|
|
|
cling::Interpreter::CompilationResult compRes;
|
|
const int indent = m_MetaProcessor->process(Line, compRes);
|
|
|
|
// Quit requested?
|
|
if (indent < 0)
|
|
break;
|
|
|
|
Prompt.replace(7, std::string::npos,
|
|
m_MetaProcessor->getInterpreter().isRawInputEnabled() ? "! " : "$ ");
|
|
|
|
// Continuation requested?
|
|
if (indent > 0) {
|
|
Prompt.append(1, '?');
|
|
Prompt.append(indent * 3, ' ');
|
|
}
|
|
}
|
|
catch(InterpreterException& e) {
|
|
if (!e.diagnose()) {
|
|
cling::errs() << ">>> Caught an interpreter exception!\n"
|
|
<< ">>> " << e.what() << '\n';
|
|
}
|
|
}
|
|
catch(std::exception& e) {
|
|
cling::errs() << ">>> Caught a std::exception!\n"
|
|
<< ">>> " << e.what() << '\n';
|
|
}
|
|
catch(...) {
|
|
cling::errs() << "Exception occurred. Recovering...\n";
|
|
}
|
|
}
|
|
m_MetaProcessor->getOuts().flush();
|
|
}
|
|
|
|
void UserInterface::PrintLogo() {
|
|
llvm::raw_ostream& outs = m_MetaProcessor->getOuts();
|
|
const clang::LangOptions& LangOpts
|
|
= m_MetaProcessor->getInterpreter().getCI()->getLangOpts();
|
|
if (LangOpts.CPlusPlus) {
|
|
outs << "\n"
|
|
"****************** CLING ******************\n"
|
|
"* Type C++ code and press enter to run it *\n"
|
|
"* Type .q to exit *\n"
|
|
"*******************************************\n";
|
|
} else {
|
|
outs << "\n"
|
|
"***************** CLING *****************\n"
|
|
"* Type C code and press enter to run it *\n"
|
|
"* Type .q to exit *\n"
|
|
"*****************************************\n";
|
|
}
|
|
}
|
|
} // end namespace cling
|