Head

GCC Code Coverage Report

Directory:	.		Exec	Total	Coverage
File:	src/main/interactive_shell.cpp	Lines:	59	88	67.0 %
Date:	2021-05-24	Branches:	103	295	34.9 %


/******************************************************************************
 * 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 <algorithm>
#include <cstdlib>
#include <iostream>
#include <set>
#include <string.h>
#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 "options/language.h"
#include "options/options.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 cvc_commands[] = {
#include "main/cvc_tokens.h"
};/* cvc_commands */

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)
    : d_options(solver->getOptions()),
      d_in(*d_options.getIn()),
      d_out(*d_options.getOutConst()),
      d_quit(false)
{
  ParserBuilder parserBuilder(solver, sm, d_options);
  /* Create parser with bogus input. */
  d_parser = parserBuilder.build();
  if(d_options.wasSetByUserForceLogicString()) {
    LogicInfo tmp(d_options.getForceLogicString());
    d_parser->forceLogic(tmp.getLogicString());
  }

#if HAVE_LIBEDITLINE
  if(&d_in == &cin) {
    ::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();

    OutputLanguage lang = toOutputLanguage(d_options.getInputLanguage());
    switch(lang) {
      case output::LANG_CVC:
        d_historyFilename = string(getenv("HOME")) + "/.cvc5_history";
        commandsBegin = cvc_commands;
        commandsEnd =
            cvc_commands + sizeof(cvc_commands) / sizeof(*cvc_commands);
        break;
      case output::LANG_TPTP:
        d_historyFilename = string(getenv("HOME")) + "/.cvc5_history_tptp";
        commandsBegin = tptp_commands;
        commandsEnd =
            tptp_commands + sizeof(tptp_commands) / sizeof(*tptp_commands);
        break;
      default:
        if (language::isOutputLang_smt2(lang))
        {
          d_historyFilename = string(getenv("HOME")) + "/.cvc5_history_smtlib2";
          commandsBegin = smt2_commands;
          commandsEnd =
              smt2_commands + sizeof(smt2_commands) / sizeof(*smt2_commands);
        }
        else
        {
          std::stringstream ss;
          ss << "internal error: unhandled language " << lang;
          throw Exception(ss.str());
        }
    }
    d_usingEditline = true;
    int err = ::read_history(d_historyFilename.c_str());
    ::stifle_history(s_historyLimit);
    if(Notice.isOn()) {
      if(err == 0) {
        Notice() << "Read " << ::history_length << " lines of history from "
                 << d_historyFilename << std::endl;
      } else {
        Notice() << "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(err == 0) {
    Notice() << "Wrote " << ::history_length << " lines of history to "
             << d_historyFilename << std::endl;
  } else {
    Notice() << "Could not write history to " << d_historyFilename
             << ": " << strerror(err) << std::endl;
  }
#endif /* HAVE_LIBEDITLINE */
  delete d_parser;
}

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(d_options.getInteractivePrompt()
                             ? (line == "" ? "cvc5> " : "... > ")
                             : "");
    if(lineBuf != NULL && lineBuf[0] != '\0') {
      ::add_history(lineBuf);
    }
    line += lineBuf == NULL ? "" : lineBuf;
    free(lineBuf);
#endif /* HAVE_LIBEDITLINE */
  }
  else
  {
    if(d_options.getInteractivePrompt()) {
      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(d_options.getInteractivePrompt() ? "... > " : "");
        if(lineBuf != NULL && lineBuf[0] != '\0') {
          ::add_history(lineBuf);
        }
        line = lineBuf == NULL ? "" : lineBuf;
        free(lineBuf);
#endif /* HAVE_LIBEDITLINE */
      }
      else
      {
        if(d_options.getInteractivePrompt()) {
          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_options.getInputLanguage(),
                                           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 (language::isOutputLang_smt2(d_options.getOutputLanguage()))
    {
      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 SmtEngine,
    // 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 <algorithm>
21		#include <cstdlib>
22		#include <iostream>
23		#include <set>
24		#include <string.h>
25		#include <string>
26		#include <utility>
27		#include <vector>
28
29		// This must go before HAVE_LIBEDITLINE.
30		#include "base/cvc5config.h"
31
32		#if HAVE_LIBEDITLINE
33		#include <editline/readline.h>
34		# if HAVE_EXT_STDIO_FILEBUF_H
35		# include <ext/stdio_filebuf.h>
36		# endif /* HAVE_EXT_STDIO_FILEBUF_H */
37		#endif /* HAVE_LIBEDITLINE */
38
39		#include "api/cpp/cvc5.h"
40		#include "base/check.h"
41		#include "base/output.h"
42		#include "expr/symbol_manager.h"
43		#include "options/language.h"
44		#include "options/options.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	9391	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 cvc_commands[] = {
70		#include "main/cvc_tokens.h"
71		};/* cvc_commands */
72
73		static const std::string smt2_commands[] = {
74		#include "main/smt2_tokens.h"
75		};/* smt2_commands */
76
77		static const std::string tptp_commands[] = {
78		#include "main/tptp_tokens.h"
79		};/* tptp_commands */
80
81		static const std::string* commandsBegin;
82		static const std::string* commandsEnd;
83
84		static set<string> s_declarations;
85
86		#endif /* HAVE_LIBEDITLINE */
87
88	12	InteractiveShell::InteractiveShell(api::Solver* solver, SymbolManager* sm)
89	12	: d_options(solver->getOptions()),
90	12	d_in(*d_options.getIn()),
91	12	d_out(*d_options.getOutConst()),
92	36	d_quit(false)
93		{
94	24	ParserBuilder parserBuilder(solver, sm, d_options);
95		/* Create parser with bogus input. */
96	12	d_parser = parserBuilder.build();
97	12	if(d_options.wasSetByUserForceLogicString()) {
98		LogicInfo tmp(d_options.getForceLogicString());
99		d_parser->forceLogic(tmp.getLogicString());
100		}
101
102		#if HAVE_LIBEDITLINE
103		if(&d_in == &cin) {
104		::rl_readline_name = const_cast<char*>("cvc5");
105		#if EDITLINE_COMPENTRY_FUNC_RETURNS_CHARP
106		::rl_completion_entry_function = commandGenerator;
107		#else /* EDITLINE_COMPENTRY_FUNC_RETURNS_CHARP */
108		::rl_completion_entry_function = (int ()(const char, int)) commandGenerator;
109		#endif /* EDITLINE_COMPENTRY_FUNC_RETURNS_CHARP */
110		::using_history();
111
112		OutputLanguage lang = toOutputLanguage(d_options.getInputLanguage());
113		switch(lang) {
114		case output::LANG_CVC:
115		d_historyFilename = string(getenv("HOME")) + "/.cvc5_history";
116		commandsBegin = cvc_commands;
117		commandsEnd =
118		cvc_commands + sizeof(cvc_commands) / sizeof(*cvc_commands);
119		break;
120		case output::LANG_TPTP:
121		d_historyFilename = string(getenv("HOME")) + "/.cvc5_history_tptp";
122		commandsBegin = tptp_commands;
123		commandsEnd =
124		tptp_commands + sizeof(tptp_commands) / sizeof(*tptp_commands);
125		break;
126		default:
127		if (language::isOutputLang_smt2(lang))
128		{
129		d_historyFilename = string(getenv("HOME")) + "/.cvc5_history_smtlib2";
130		commandsBegin = smt2_commands;
131		commandsEnd =
132		smt2_commands + sizeof(smt2_commands) / sizeof(*smt2_commands);
133		}
134		else
135		{
136		std::stringstream ss;
137		ss << "internal error: unhandled language " << lang;
138		throw Exception(ss.str());
139		}
140		}
141		d_usingEditline = true;
142		int err = ::read_history(d_historyFilename.c_str());
143		::stifle_history(s_historyLimit);
144		if(Notice.isOn()) {
145		if(err == 0) {
146		Notice() << "Read " << ::history_length << " lines of history from "
147		<< d_historyFilename << std::endl;
148		} else {
149		Notice() << "Could not read history from " << d_historyFilename
150		<< ": " << strerror(err) << std::endl;
151		}
152		}
153		} else {
154		d_usingEditline = false;
155		}
156		#else /* HAVE_LIBEDITLINE */
157	12	d_usingEditline = false;
158		#endif /* HAVE_LIBEDITLINE */
159	12	}/* InteractiveShell::InteractiveShell() */
160
161	24	InteractiveShell::~InteractiveShell() {
162		#if HAVE_LIBEDITLINE
163		int err = ::write_history(d_historyFilename.c_str());
164		if(err == 0) {
165		Notice() << "Wrote " << ::history_length << " lines of history to "
166		<< d_historyFilename << std::endl;
167		} else {
168		Notice() << "Could not write history to " << d_historyFilename
169		<< ": " << strerror(err) << std::endl;
170		}
171		#endif /* HAVE_LIBEDITLINE */
172	12	delete d_parser;
173	12	}
174
175	28	Command* InteractiveShell::readCommand()
176		{
177	28	char* lineBuf = NULL;
178	56	string line = "";
179
180	28	restart:
181
182		/* Don't do anything if the input is closed or if we've seen a
183		* QuitCommand. */
184	28	if(d_in.eof() \|\| d_quit) {
185		d_out << endl;
186		return NULL;
187		}
188
189		/* If something's wrong with the input, there's nothing we can do. */
190	28	if( !d_in.good() ) {
191		throw ParserException("Interactive input broken.");
192		}
193
194		/* Prompt the user for input. */
195	28	if (d_usingEditline)
196		{
197		#if HAVE_LIBEDITLINE
198		lineBuf = ::readline(d_options.getInteractivePrompt()
199		? (line == "" ? "cvc5> " : "... > ")
200		: "");
201		if(lineBuf != NULL && lineBuf[0] != '\0') {
202		::add_history(lineBuf);
203		}
204		line += lineBuf == NULL ? "" : lineBuf;
205		free(lineBuf);
206		#endif /* HAVE_LIBEDITLINE */
207		}
208		else
209		{
210	28	if(d_options.getInteractivePrompt()) {
211	28	if(line == "") {
212	28	d_out << "cvc5> " << flush;
213		} else {
214		d_out << "... > " << flush;
215		}
216		}
217
218		/* Read a line */
219	56	stringbuf sb;
220	28	d_in.get(sb);
221	28	line += sb.str();
222		}
223
224	28	string input = "";
225		while(true) {
226	56	Debug("interactive") << "Input now '" << input << line << "'" << endl
227	28	<< flush;
228
229	28	Assert(!(d_in.fail() && !d_in.eof()) \|\| line.empty());
230
231		/* Check for failure. */
232	28	if(d_in.fail() && !d_in.eof()) {
233		/* This should only happen if the input line was empty. */
234	6	Assert(line.empty());
235	6	d_in.clear();
236		}
237
238		/* Strip trailing whitespace. */
239	28	int n = line.length() - 1;
240	28	while( !line.empty() && isspace(line[n]) ) {
241		line.erase(n,1);
242		n--;
243		}
244
245		/* If we hit EOF, we're done. */
246	84	if ((!d_usingEditline && d_in.eof())
247	44	\|\| (d_usingEditline && lineBuf == NULL))
248		{
249	12	input += line;
250
251	12	if(input.empty()) {
252		/* Nothing left to parse. */
253	12	d_out << endl;
254	12	return NULL;
255		}
256
257		/* Some input left to parse, but nothing left to read.
258		Jump out of input loop. */
259		d_out << endl;
260		input = line = "";
261		d_in.clear();
262		goto restart;
263		}
264
265	16	if (!d_usingEditline)
266		{
267		/* Extract the newline delimiter from the stream too */
268	16	int c CVC5_UNUSED = d_in.get();
269	16	Assert(c == '\n');
270	32	Debug("interactive") << "Next char is '" << (char)c << "'" << endl
271	16	<< flush;
272		}
273
274	16	input += line;
275
276		/* If the last char was a backslash, continue on the next line. */
277	16	n = input.length() - 1;
278	16	if( !line.empty() && input[n] == '\\' ) {
279		input[n] = '\n';
280		if (d_usingEditline)
281		{
282		#if HAVE_LIBEDITLINE
283		lineBuf = ::readline(d_options.getInteractivePrompt() ? "... > " : "");
284		if(lineBuf != NULL && lineBuf[0] != '\0') {
285		::add_history(lineBuf);
286		}
287		line = lineBuf == NULL ? "" : lineBuf;
288		free(lineBuf);
289		#endif /* HAVE_LIBEDITLINE */
290		}
291		else
292		{
293		if(d_options.getInteractivePrompt()) {
294		d_out << "... > " << flush;
295		}
296
297		/* Read a line */
298		stringbuf sb;
299		d_in.get(sb);
300		line = sb.str();
301		}
302		} else {
303		/* No continuation, we're done. */
304	16	Debug("interactive") << "Leaving input loop." << endl << flush;
305	16	break;
306		}
307		}
308
309	16	d_parser->setInput(Input::newStringInput(d_options.getInputLanguage(),
310		input, INPUT_FILENAME));
311
312		/* There may be more than one command in the input. Build up a
313		sequence. */
314	16	CommandSequence *cmd_seq = new CommandSequence();
315		Command *cmd;
316
317		try
318		{
319	40	while ((cmd = d_parser->nextCommand()))
320		{
321	12	cmd_seq->addCommand(cmd);
322	12	if (dynamic_cast<QuitCommand*>(cmd) != NULL)
323		{
324		d_quit = true;
325		break;
326		}
327		else
328		{
329		#if HAVE_LIBEDITLINE
330		if (dynamic_cast<DeclareFunctionCommand*>(cmd) != NULL)
331		{
332		s_declarations.insert(
333		dynamic_cast<DeclareFunctionCommand*>(cmd)->getSymbol());
334		}
335		else if (dynamic_cast<DefineFunctionCommand*>(cmd) != NULL)
336		{
337		s_declarations.insert(
338		dynamic_cast<DefineFunctionCommand*>(cmd)->getSymbol());
339		}
340		else if (dynamic_cast<DeclareSortCommand*>(cmd) != NULL)
341		{
342		s_declarations.insert(
343		dynamic_cast<DeclareSortCommand*>(cmd)->getSymbol());
344		}
345		else if (dynamic_cast<DefineSortCommand*>(cmd) != NULL)
346		{
347		s_declarations.insert(
348		dynamic_cast<DefineSortCommand*>(cmd)->getSymbol());
349		}
350		#endif /* HAVE_LIBEDITLINE */
351		}
352		}
353		}
354		catch (ParserEndOfFileException& pe)
355		{
356		line += "\n";
357		goto restart;
358		}
359		catch (ParserException& pe)
360		{
361		if (language::isOutputLang_smt2(d_options.getOutputLanguage()))
362		{
363		d_out << "(error \"" << pe << "\")" << endl;
364		}
365		else
366		{
367		d_out << pe << endl;
368		}
369		// We can't really clear out the sequence and abort the current line,
370		// because the parse error might be for the second command on the
371		// line. The first ones haven't yet been executed by the SmtEngine,
372		// but the parser state has already made the variables and the mappings
373		// in the symbol table. So unfortunately, either we exit cvc5 entirely,
374		// or we commit to the current line up to the command with the parse
375		// error.
376		//
377		// FIXME: does that mean e.g. that a pushed LET scope might not yet have
378		// been popped?!
379		//
380		// delete cmd_seq;
381		// cmd_seq = new CommandSequence();
382		}
383
384	16	return cmd_seq;
385		}/* InteractiveShell::readCommand() */
386
387		#if HAVE_LIBEDITLINE
388
389		char** commandCompletion(const char* text, int start, int end) {
390		Debug("rl") << "text: " << text << endl;
391		Debug("rl") << "start: " << start << " end: " << end << endl;
392		return rl_completion_matches(text, commandGenerator);
393		}
394
395		// Our peculiar versions of "less than" for strings
396		struct StringPrefix1Less {
397		bool operator()(const std::string& s1, const std::string& s2) {
398		size_t l1 = s1.length(), l2 = s2.length();
399		size_t l = l1 <= l2 ? l1 : l2;
400		return s1.compare(0, l1, s2, 0, l) < 0;
401		}
402		};/* struct StringPrefix1Less */
403		struct StringPrefix2Less {
404		bool operator()(const std::string& s1, const std::string& s2) {
405		size_t l1 = s1.length(), l2 = s2.length();
406		size_t l = l1 <= l2 ? l1 : l2;
407		return s1.compare(0, l, s2, 0, l2) < 0;
408		}
409		};/* struct StringPrefix2Less */
410
411		char* commandGenerator(const char* text, int state) {
412		static thread_local const std::string* rlCommand;
413		static thread_local set<string>::const_iterator* rlDeclaration;
414
415		const std::string* i = lower_bound(commandsBegin, commandsEnd, text, StringPrefix2Less());
416		const std::string* j = upper_bound(commandsBegin, commandsEnd, text, StringPrefix1Less());
417
418		set<string>::const_iterator ii = lower_bound(s_declarations.begin(), s_declarations.end(), text, StringPrefix2Less());
419		set<string>::const_iterator jj = upper_bound(s_declarations.begin(), s_declarations.end(), text, StringPrefix1Less());
420
421		if(rlDeclaration == NULL) {
422		rlDeclaration = new set<string>::const_iterator();
423		}
424
425		if(state == 0) {
426		rlCommand = i;
427		*rlDeclaration = ii;
428		}
429
430		if(rlCommand != j) {
431		return strdup((*rlCommand++).c_str());
432		}
433
434		return rlDeclaration == jj ? NULL : strdup(((*rlDeclaration)++).c_str());
435		}
436
437		#endif /* HAVE_LIBEDITLINE */
438
439	28173	} // namespace cvc5