Head

GCC Code Coverage Report

Directory:	.		Exec	Total	Coverage
File:	src/main/interactive_shell.cpp	Lines:	56	84	66.7 %
Date:	2021-11-07	Branches:	102	289	35.3 %


/******************************************************************************
 * Top contributors (to current version):
 *   Morgan Deters, Christopher L. Conway, Andrew V. Jones
 *
 * This file is part of the cvc5 project.
 *
 * Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
 * in the top-level source directory and their institutional affiliations.
 * All rights reserved.  See the file COPYING in the top-level source
 * directory for licensing information.
 * ****************************************************************************
 *
 * Interactive shell for cvc5.
 *
 * This file is the implementation for the cvc5 interactive shell.
 * The shell supports the editline library.
 */
#include "main/interactive_shell.h"

#include <cstring>
#include <unistd.h>

#include <algorithm>
#include <cstdlib>
#include <iostream>
#include <set>
#include <string>
#include <utility>
#include <vector>

// This must go before HAVE_LIBEDITLINE.
#include "base/cvc5config.h"

#if HAVE_LIBEDITLINE
#include <editline/readline.h>
#  if HAVE_EXT_STDIO_FILEBUF_H
#    include <ext/stdio_filebuf.h>
#  endif /* HAVE_EXT_STDIO_FILEBUF_H */
#endif   /* HAVE_LIBEDITLINE */

#include "api/cpp/cvc5.h"
#include "base/check.h"
#include "base/output.h"
#include "expr/symbol_manager.h"
#include "parser/input.h"
#include "parser/parser.h"
#include "parser/parser_builder.h"
#include "smt/command.h"
#include "theory/logic_info.h"

using namespace std;

namespace cvc5 {

using namespace parser;
using namespace language;

const string InteractiveShell::INPUT_FILENAME = "<shell>";

#if HAVE_LIBEDITLINE

#if HAVE_EXT_STDIO_FILEBUF_H
using __gnu_cxx::stdio_filebuf;
#endif /* HAVE_EXT_STDIO_FILEBUF_H */

char** commandCompletion(const char* text, int start, int end);
char* commandGenerator(const char* text, int state);

static const std::string smt2_commands[] = {
#include "main/smt2_tokens.h"
};/* smt2_commands */

static const std::string tptp_commands[] = {
#include "main/tptp_tokens.h"
};/* tptp_commands */

static const std::string* commandsBegin;
static const std::string* commandsEnd;

static set<string> s_declarations;

#endif /* HAVE_LIBEDITLINE */

InteractiveShell::InteractiveShell(api::Solver* solver,
                                   SymbolManager* sm,
                                   std::istream& in,
                                   std::ostream& out)
    : d_solver(solver), d_in(in), d_out(out), d_quit(false)
{
  ParserBuilder parserBuilder(solver, sm, true);
  /* Create parser with bogus input. */
  d_parser.reset(parserBuilder.build());
  if (d_solver->getOptionInfo("force-logic").setByUser)
  {
    LogicInfo tmp(d_solver->getOption("force-logic"));
    d_parser->forceLogic(tmp.getLogicString());
  }

#if HAVE_LIBEDITLINE
  if (&d_in == &std::cin && isatty(fileno(stdin)))
  {
    ::rl_readline_name = const_cast<char*>("cvc5");
#if EDITLINE_COMPENTRY_FUNC_RETURNS_CHARP
    ::rl_completion_entry_function = commandGenerator;
#else /* EDITLINE_COMPENTRY_FUNC_RETURNS_CHARP */
    ::rl_completion_entry_function = (int (*)(const char*, int)) commandGenerator;
#endif /* EDITLINE_COMPENTRY_FUNC_RETURNS_CHARP */
    ::using_history();

    std::string lang = solver->getOption("input-language");
    if (lang == "LANG_TPTP")
    {
      d_historyFilename = string(getenv("HOME")) + "/.cvc5_history_tptp";
      commandsBegin = tptp_commands;
      commandsEnd =
          tptp_commands + sizeof(tptp_commands) / sizeof(*tptp_commands);
    }
    else if (lang == "LANG_SMTLIB_V2_6")
    {
      d_historyFilename = string(getenv("HOME")) + "/.cvc5_history_smtlib2";
      commandsBegin = smt2_commands;
      commandsEnd =
          smt2_commands + sizeof(smt2_commands) / sizeof(*smt2_commands);
    }
    else
    {
      throw Exception("internal error: unhandled language " + lang);
    }
    d_usingEditline = true;
    int err = ::read_history(d_historyFilename.c_str());
    ::stifle_history(s_historyLimit);
    if (d_solver->getOptionInfo("verbosity").intValue() >= 1)
    {
      if(err == 0) {
        d_solver->getDriverOptions().err()
            << "Read " << ::history_length << " lines of history from "
            << d_historyFilename << std::endl;
      } else {
        d_solver->getDriverOptions().err()
            << "Could not read history from " << d_historyFilename << ": "
            << strerror(err) << std::endl;
      }
    }
  }
  else
  {
    d_usingEditline = false;
  }
#else  /* HAVE_LIBEDITLINE */
  d_usingEditline = false;
#endif /* HAVE_LIBEDITLINE */
}/* InteractiveShell::InteractiveShell() */

InteractiveShell::~InteractiveShell() {
#if HAVE_LIBEDITLINE
  int err = ::write_history(d_historyFilename.c_str());
  if (d_solver->getOptionInfo("verbosity").intValue() >= 1)
  {
    if (err == 0)
    {
      d_solver->getDriverOptions().err()
          << "Wrote " << ::history_length << " lines of history to "
          << d_historyFilename << std::endl;
    } else {
      d_solver->getDriverOptions().err()
          << "Could not write history to " << d_historyFilename << ": "
          << strerror(err) << std::endl;
  }
  }
#endif /* HAVE_LIBEDITLINE */
}

Command* InteractiveShell::readCommand()
{
  char* lineBuf = NULL;
  string line = "";

restart:

  /* Don't do anything if the input is closed or if we've seen a
   * QuitCommand. */
  if(d_in.eof() || d_quit) {
    d_out << endl;
    return NULL;
  }

  /* If something's wrong with the input, there's nothing we can do. */
  if( !d_in.good() ) {
    throw ParserException("Interactive input broken.");
  }

  /* Prompt the user for input. */
  if (d_usingEditline)
  {
#if HAVE_LIBEDITLINE
    lineBuf = ::readline(line == "" ? "cvc5> " : "... > ");
    if(lineBuf != NULL && lineBuf[0] != '\0') {
      ::add_history(lineBuf);
    }
    line += lineBuf == NULL ? "" : lineBuf;
    free(lineBuf);
#endif /* HAVE_LIBEDITLINE */
  }
  else
  {
    if (line == "")
    {
      d_out << "cvc5> " << flush;
    }
    else
    {
      d_out << "... > " << flush;
    }

    /* Read a line */
    stringbuf sb;
    d_in.get(sb);
    line += sb.str();
  }

  string input = "";
  while(true) {
    Debug("interactive") << "Input now '" << input << line << "'" << endl
                         << flush;

    Assert(!(d_in.fail() && !d_in.eof()) || line.empty());

    /* Check for failure. */
    if(d_in.fail() && !d_in.eof()) {
      /* This should only happen if the input line was empty. */
      Assert(line.empty());
      d_in.clear();
    }

    /* Strip trailing whitespace. */
    int n = line.length() - 1;
    while( !line.empty() && isspace(line[n]) ) {
      line.erase(n,1);
      n--;
    }

    /* If we hit EOF, we're done. */
    if ((!d_usingEditline && d_in.eof())
        || (d_usingEditline && lineBuf == NULL))
    {
      input += line;

      if(input.empty()) {
        /* Nothing left to parse. */
        d_out << endl;
        return NULL;
      }

      /* Some input left to parse, but nothing left to read.
         Jump out of input loop. */
      d_out << endl;
      input = line = "";
      d_in.clear();
      goto restart;
    }

    if (!d_usingEditline)
    {
      /* Extract the newline delimiter from the stream too */
      int c CVC5_UNUSED = d_in.get();
      Assert(c == '\n');
      Debug("interactive") << "Next char is '" << (char)c << "'" << endl
                           << flush;
    }

    input += line;

    /* If the last char was a backslash, continue on the next line. */
    n = input.length() - 1;
    if( !line.empty() && input[n] == '\\' ) {
      input[n] = '\n';
      if (d_usingEditline)
      {
#if HAVE_LIBEDITLINE
        lineBuf = ::readline("... > ");
        if(lineBuf != NULL && lineBuf[0] != '\0') {
          ::add_history(lineBuf);
        }
        line = lineBuf == NULL ? "" : lineBuf;
        free(lineBuf);
#endif /* HAVE_LIBEDITLINE */
      }
      else
      {
        d_out << "... > " << flush;

        /* Read a line */
        stringbuf sb;
        d_in.get(sb);
        line = sb.str();
      }
    } else {
      /* No continuation, we're done. */
      Debug("interactive") << "Leaving input loop." << endl << flush;
      break;
    }
  }

  d_parser->setInput(Input::newStringInput(
      d_solver->getOption("input-language"), input, INPUT_FILENAME));

  /* There may be more than one command in the input. Build up a
     sequence. */
  CommandSequence *cmd_seq = new CommandSequence();
  Command *cmd;

  try
  {
    while ((cmd = d_parser->nextCommand()))
    {
      cmd_seq->addCommand(cmd);
      if (dynamic_cast<QuitCommand*>(cmd) != NULL)
      {
        d_quit = true;
        break;
      }
      else
      {
#if HAVE_LIBEDITLINE
        if (dynamic_cast<DeclareFunctionCommand*>(cmd) != NULL)
        {
          s_declarations.insert(
              dynamic_cast<DeclareFunctionCommand*>(cmd)->getSymbol());
        }
        else if (dynamic_cast<DefineFunctionCommand*>(cmd) != NULL)
        {
          s_declarations.insert(
              dynamic_cast<DefineFunctionCommand*>(cmd)->getSymbol());
        }
        else if (dynamic_cast<DeclareSortCommand*>(cmd) != NULL)
        {
          s_declarations.insert(
              dynamic_cast<DeclareSortCommand*>(cmd)->getSymbol());
        }
        else if (dynamic_cast<DefineSortCommand*>(cmd) != NULL)
        {
          s_declarations.insert(
              dynamic_cast<DefineSortCommand*>(cmd)->getSymbol());
        }
#endif /* HAVE_LIBEDITLINE */
      }
    }
  }
  catch (ParserEndOfFileException& pe)
  {
    line += "\n";
    goto restart;
  }
  catch (ParserException& pe)
  {
    if (d_solver->getOption("output-language") == "LANG_SMTLIB_V2_6")
    {
      d_out << "(error \"" << pe << "\")" << endl;
    }
    else
    {
      d_out << pe << endl;
    }
    // We can't really clear out the sequence and abort the current line,
    // because the parse error might be for the second command on the
    // line.  The first ones haven't yet been executed by the SolverEngine,
    // but the parser state has already made the variables and the mappings
    // in the symbol table.  So unfortunately, either we exit cvc5 entirely,
    // or we commit to the current line up to the command with the parse
    // error.
    //
    // FIXME: does that mean e.g. that a pushed LET scope might not yet have
    // been popped?!
    //
    // delete cmd_seq;
    // cmd_seq = new CommandSequence();
  }

  return cmd_seq;
}/* InteractiveShell::readCommand() */

#if HAVE_LIBEDITLINE

char** commandCompletion(const char* text, int start, int end) {
  Debug("rl") << "text: " << text << endl;
  Debug("rl") << "start: " << start << " end: " << end << endl;
  return rl_completion_matches(text, commandGenerator);
}

// Our peculiar versions of "less than" for strings
struct StringPrefix1Less {
  bool operator()(const std::string& s1, const std::string& s2) {
    size_t l1 = s1.length(), l2 = s2.length();
    size_t l = l1 <= l2 ? l1 : l2;
    return s1.compare(0, l1, s2, 0, l) < 0;
  }
};/* struct StringPrefix1Less */
struct StringPrefix2Less {
  bool operator()(const std::string& s1, const std::string& s2) {
    size_t l1 = s1.length(), l2 = s2.length();
    size_t l = l1 <= l2 ? l1 : l2;
    return s1.compare(0, l, s2, 0, l2) < 0;
  }
};/* struct StringPrefix2Less */

char* commandGenerator(const char* text, int state) {
  static thread_local const std::string* rlCommand;
  static thread_local set<string>::const_iterator* rlDeclaration;

  const std::string* i = lower_bound(commandsBegin, commandsEnd, text, StringPrefix2Less());
  const std::string* j = upper_bound(commandsBegin, commandsEnd, text, StringPrefix1Less());

  set<string>::const_iterator ii = lower_bound(s_declarations.begin(), s_declarations.end(), text, StringPrefix2Less());
  set<string>::const_iterator jj = upper_bound(s_declarations.begin(), s_declarations.end(), text, StringPrefix1Less());

  if(rlDeclaration == NULL) {
    rlDeclaration = new set<string>::const_iterator();
  }

  if(state == 0) {
    rlCommand = i;
    *rlDeclaration = ii;
  }

  if(rlCommand != j) {
    return strdup((*rlCommand++).c_str());
  }

  return *rlDeclaration == jj ? NULL : strdup((*(*rlDeclaration)++).c_str());
}

#endif /* HAVE_LIBEDITLINE */

}  // namespace cvc5


Generated by: GCOVR (Version 3.2)

Line	Exec	Source
1		/******************************************************************************
2		* Top contributors (to current version):
3		* Morgan Deters, Christopher L. Conway, Andrew V. Jones
4		*
5		* This file is part of the cvc5 project.
6		*
7		* Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
8		* in the top-level source directory and their institutional affiliations.
9		* All rights reserved. See the file COPYING in the top-level source
10		* directory for licensing information.
11		* ****************************************************************************
12		*
13		* Interactive shell for cvc5.
14		*
15		* This file is the implementation for the cvc5 interactive shell.
16		* The shell supports the editline library.
17		*/
18		#include "main/interactive_shell.h"
19
20		#include <cstring>
21		#include <unistd.h>
22
23		#include <algorithm>
24		#include <cstdlib>
25		#include <iostream>
26		#include <set>
27		#include <string>
28		#include <utility>
29		#include <vector>
30
31		// This must go before HAVE_LIBEDITLINE.
32		#include "base/cvc5config.h"
33
34		#if HAVE_LIBEDITLINE
35		#include <editline/readline.h>
36		# if HAVE_EXT_STDIO_FILEBUF_H
37		# include <ext/stdio_filebuf.h>
38		# endif /* HAVE_EXT_STDIO_FILEBUF_H */
39		#endif /* HAVE_LIBEDITLINE */
40
41		#include "api/cpp/cvc5.h"
42		#include "base/check.h"
43		#include "base/output.h"
44		#include "expr/symbol_manager.h"
45		#include "parser/input.h"
46		#include "parser/parser.h"
47		#include "parser/parser_builder.h"
48		#include "smt/command.h"
49		#include "theory/logic_info.h"
50
51		using namespace std;
52
53		namespace cvc5 {
54
55		using namespace parser;
56		using namespace language;
57
58	10370	const string InteractiveShell::INPUT_FILENAME = "<shell>";
59
60		#if HAVE_LIBEDITLINE
61
62		#if HAVE_EXT_STDIO_FILEBUF_H
63		using __gnu_cxx::stdio_filebuf;
64		#endif /* HAVE_EXT_STDIO_FILEBUF_H */
65
66		char** commandCompletion(const char* text, int start, int end);
67		char* commandGenerator(const char* text, int state);
68
69		static const std::string smt2_commands[] = {
70		#include "main/smt2_tokens.h"
71		};/* smt2_commands */
72
73		static const std::string tptp_commands[] = {
74		#include "main/tptp_tokens.h"
75		};/* tptp_commands */
76
77		static const std::string* commandsBegin;
78		static const std::string* commandsEnd;
79
80		static set<string> s_declarations;
81
82		#endif /* HAVE_LIBEDITLINE */
83
84	12	InteractiveShell::InteractiveShell(api::Solver* solver,
85		SymbolManager* sm,
86		std::istream& in,
87	12	std::ostream& out)
88	12	: d_solver(solver), d_in(in), d_out(out), d_quit(false)
89		{
90	24	ParserBuilder parserBuilder(solver, sm, true);
91		/* Create parser with bogus input. */
92	12	d_parser.reset(parserBuilder.build());
93	12	if (d_solver->getOptionInfo("force-logic").setByUser)
94		{
95		LogicInfo tmp(d_solver->getOption("force-logic"));
96		d_parser->forceLogic(tmp.getLogicString());
97		}
98
99		#if HAVE_LIBEDITLINE
100		if (&d_in == &std::cin && isatty(fileno(stdin)))
101		{
102		::rl_readline_name = const_cast<char*>("cvc5");
103		#if EDITLINE_COMPENTRY_FUNC_RETURNS_CHARP
104		::rl_completion_entry_function = commandGenerator;
105		#else /* EDITLINE_COMPENTRY_FUNC_RETURNS_CHARP */
106		::rl_completion_entry_function = (int ()(const char, int)) commandGenerator;
107		#endif /* EDITLINE_COMPENTRY_FUNC_RETURNS_CHARP */
108		::using_history();
109
110		std::string lang = solver->getOption("input-language");
111		if (lang == "LANG_TPTP")
112		{
113		d_historyFilename = string(getenv("HOME")) + "/.cvc5_history_tptp";
114		commandsBegin = tptp_commands;
115		commandsEnd =
116		tptp_commands + sizeof(tptp_commands) / sizeof(*tptp_commands);
117		}
118		else if (lang == "LANG_SMTLIB_V2_6")
119		{
120		d_historyFilename = string(getenv("HOME")) + "/.cvc5_history_smtlib2";
121		commandsBegin = smt2_commands;
122		commandsEnd =
123		smt2_commands + sizeof(smt2_commands) / sizeof(*smt2_commands);
124		}
125		else
126		{
127		throw Exception("internal error: unhandled language " + lang);
128		}
129		d_usingEditline = true;
130		int err = ::read_history(d_historyFilename.c_str());
131		::stifle_history(s_historyLimit);
132		if (d_solver->getOptionInfo("verbosity").intValue() >= 1)
133		{
134		if(err == 0) {
135		d_solver->getDriverOptions().err()
136		<< "Read " << ::history_length << " lines of history from "
137		<< d_historyFilename << std::endl;
138		} else {
139		d_solver->getDriverOptions().err()
140		<< "Could not read history from " << d_historyFilename << ": "
141		<< strerror(err) << std::endl;
142		}
143		}
144		}
145		else
146		{
147		d_usingEditline = false;
148		}
149		#else /* HAVE_LIBEDITLINE */
150	12	d_usingEditline = false;
151		#endif /* HAVE_LIBEDITLINE */
152	12	}/* InteractiveShell::InteractiveShell() */
153
154	12	InteractiveShell::~InteractiveShell() {
155		#if HAVE_LIBEDITLINE
156		int err = ::write_history(d_historyFilename.c_str());
157		if (d_solver->getOptionInfo("verbosity").intValue() >= 1)
158		{
159		if (err == 0)
160		{
161		d_solver->getDriverOptions().err()
162		<< "Wrote " << ::history_length << " lines of history to "
163		<< d_historyFilename << std::endl;
164		} else {
165		d_solver->getDriverOptions().err()
166		<< "Could not write history to " << d_historyFilename << ": "
167		<< strerror(err) << std::endl;
168		}
169		}
170		#endif /* HAVE_LIBEDITLINE */
171	12	}
172
173	28	Command* InteractiveShell::readCommand()
174		{
175	28	char* lineBuf = NULL;
176	56	string line = "";
177
178	28	restart:
179
180		/* Don't do anything if the input is closed or if we've seen a
181		* QuitCommand. */
182	28	if(d_in.eof() \|\| d_quit) {
183		d_out << endl;
184		return NULL;
185		}
186
187		/* If something's wrong with the input, there's nothing we can do. */
188	28	if( !d_in.good() ) {
189		throw ParserException("Interactive input broken.");
190		}
191
192		/* Prompt the user for input. */
193	28	if (d_usingEditline)
194		{
195		#if HAVE_LIBEDITLINE
196		lineBuf = ::readline(line == "" ? "cvc5> " : "... > ");
197		if(lineBuf != NULL && lineBuf[0] != '\0') {
198		::add_history(lineBuf);
199		}
200		line += lineBuf == NULL ? "" : lineBuf;
201		free(lineBuf);
202		#endif /* HAVE_LIBEDITLINE */
203		}
204		else
205		{
206	28	if (line == "")
207		{
208	28	d_out << "cvc5> " << flush;
209		}
210		else
211		{
212		d_out << "... > " << flush;
213		}
214
215		/* Read a line */
216	56	stringbuf sb;
217	28	d_in.get(sb);
218	28	line += sb.str();
219		}
220
221	28	string input = "";
222		while(true) {
223	56	Debug("interactive") << "Input now '" << input << line << "'" << endl
224	28	<< flush;
225
226	28	Assert(!(d_in.fail() && !d_in.eof()) \|\| line.empty());
227
228		/* Check for failure. */
229	28	if(d_in.fail() && !d_in.eof()) {
230		/* This should only happen if the input line was empty. */
231	6	Assert(line.empty());
232	6	d_in.clear();
233		}
234
235		/* Strip trailing whitespace. */
236	28	int n = line.length() - 1;
237	28	while( !line.empty() && isspace(line[n]) ) {
238		line.erase(n,1);
239		n--;
240		}
241
242		/* If we hit EOF, we're done. */
243	84	if ((!d_usingEditline && d_in.eof())
244	44	\|\| (d_usingEditline && lineBuf == NULL))
245		{
246	12	input += line;
247
248	12	if(input.empty()) {
249		/* Nothing left to parse. */
250	12	d_out << endl;
251	12	return NULL;
252		}
253
254		/* Some input left to parse, but nothing left to read.
255		Jump out of input loop. */
256		d_out << endl;
257		input = line = "";
258		d_in.clear();
259		goto restart;
260		}
261
262	16	if (!d_usingEditline)
263		{
264		/* Extract the newline delimiter from the stream too */
265	16	int c CVC5_UNUSED = d_in.get();
266	16	Assert(c == '\n');
267	32	Debug("interactive") << "Next char is '" << (char)c << "'" << endl
268	16	<< flush;
269		}
270
271	16	input += line;
272
273		/* If the last char was a backslash, continue on the next line. */
274	16	n = input.length() - 1;
275	16	if( !line.empty() && input[n] == '\\' ) {
276		input[n] = '\n';
277		if (d_usingEditline)
278		{
279		#if HAVE_LIBEDITLINE
280		lineBuf = ::readline("... > ");
281		if(lineBuf != NULL && lineBuf[0] != '\0') {
282		::add_history(lineBuf);
283		}
284		line = lineBuf == NULL ? "" : lineBuf;
285		free(lineBuf);
286		#endif /* HAVE_LIBEDITLINE */
287		}
288		else
289		{
290		d_out << "... > " << flush;
291
292		/* Read a line */
293		stringbuf sb;
294		d_in.get(sb);
295		line = sb.str();
296		}
297		} else {
298		/* No continuation, we're done. */
299	16	Debug("interactive") << "Leaving input loop." << endl << flush;
300	16	break;
301		}
302		}
303
304	32	d_parser->setInput(Input::newStringInput(
305	32	d_solver->getOption("input-language"), input, INPUT_FILENAME));
306
307		/* There may be more than one command in the input. Build up a
308		sequence. */
309	16	CommandSequence *cmd_seq = new CommandSequence();
310		Command *cmd;
311
312		try
313		{
314	40	while ((cmd = d_parser->nextCommand()))
315		{
316	12	cmd_seq->addCommand(cmd);
317	12	if (dynamic_cast<QuitCommand*>(cmd) != NULL)
318		{
319		d_quit = true;
320		break;
321		}
322		else
323		{
324		#if HAVE_LIBEDITLINE
325		if (dynamic_cast<DeclareFunctionCommand*>(cmd) != NULL)
326		{
327		s_declarations.insert(
328		dynamic_cast<DeclareFunctionCommand*>(cmd)->getSymbol());
329		}
330		else if (dynamic_cast<DefineFunctionCommand*>(cmd) != NULL)
331		{
332		s_declarations.insert(
333		dynamic_cast<DefineFunctionCommand*>(cmd)->getSymbol());
334		}
335		else if (dynamic_cast<DeclareSortCommand*>(cmd) != NULL)
336		{
337		s_declarations.insert(
338		dynamic_cast<DeclareSortCommand*>(cmd)->getSymbol());
339		}
340		else if (dynamic_cast<DefineSortCommand*>(cmd) != NULL)
341		{
342		s_declarations.insert(
343		dynamic_cast<DefineSortCommand*>(cmd)->getSymbol());
344		}
345		#endif /* HAVE_LIBEDITLINE */
346		}
347		}
348		}
349		catch (ParserEndOfFileException& pe)
350		{
351		line += "\n";
352		goto restart;
353		}
354		catch (ParserException& pe)
355		{
356		if (d_solver->getOption("output-language") == "LANG_SMTLIB_V2_6")
357		{
358		d_out << "(error \"" << pe << "\")" << endl;
359		}
360		else
361		{
362		d_out << pe << endl;
363		}
364		// We can't really clear out the sequence and abort the current line,
365		// because the parse error might be for the second command on the
366		// line. The first ones haven't yet been executed by the SolverEngine,
367		// but the parser state has already made the variables and the mappings
368		// in the symbol table. So unfortunately, either we exit cvc5 entirely,
369		// or we commit to the current line up to the command with the parse
370		// error.
371		//
372		// FIXME: does that mean e.g. that a pushed LET scope might not yet have
373		// been popped?!
374		//
375		// delete cmd_seq;
376		// cmd_seq = new CommandSequence();
377		}
378
379	16	return cmd_seq;
380		}/* InteractiveShell::readCommand() */
381
382		#if HAVE_LIBEDITLINE
383
384		char** commandCompletion(const char* text, int start, int end) {
385		Debug("rl") << "text: " << text << endl;
386		Debug("rl") << "start: " << start << " end: " << end << endl;
387		return rl_completion_matches(text, commandGenerator);
388		}
389
390		// Our peculiar versions of "less than" for strings
391		struct StringPrefix1Less {
392		bool operator()(const std::string& s1, const std::string& s2) {
393		size_t l1 = s1.length(), l2 = s2.length();
394		size_t l = l1 <= l2 ? l1 : l2;
395		return s1.compare(0, l1, s2, 0, l) < 0;
396		}
397		};/* struct StringPrefix1Less */
398		struct StringPrefix2Less {
399		bool operator()(const std::string& s1, const std::string& s2) {
400		size_t l1 = s1.length(), l2 = s2.length();
401		size_t l = l1 <= l2 ? l1 : l2;
402		return s1.compare(0, l, s2, 0, l2) < 0;
403		}
404		};/* struct StringPrefix2Less */
405
406		char* commandGenerator(const char* text, int state) {
407		static thread_local const std::string* rlCommand;
408		static thread_local set<string>::const_iterator* rlDeclaration;
409
410		const std::string* i = lower_bound(commandsBegin, commandsEnd, text, StringPrefix2Less());
411		const std::string* j = upper_bound(commandsBegin, commandsEnd, text, StringPrefix1Less());
412
413		set<string>::const_iterator ii = lower_bound(s_declarations.begin(), s_declarations.end(), text, StringPrefix2Less());
414		set<string>::const_iterator jj = upper_bound(s_declarations.begin(), s_declarations.end(), text, StringPrefix1Less());
415
416		if(rlDeclaration == NULL) {
417		rlDeclaration = new set<string>::const_iterator();
418		}
419
420		if(state == 0) {
421		rlCommand = i;
422		*rlDeclaration = ii;
423		}
424
425		if(rlCommand != j) {
426		return strdup((*rlCommand++).c_str());
427		}
428
429		return rlDeclaration == jj ? NULL : strdup(((*rlDeclaration)++).c_str());
430		}
431
432		#endif /* HAVE_LIBEDITLINE */
433
434	31110	} // namespace cvc5