1 /** @file ginsh_parser.ypp
3 * Input grammar definition for ginsh.
4 * This file must be processed with yacc/bison. */
7 * GiNaC Copyright (C) 1999-2020 Johannes Gutenberg University Mainz, Germany
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
34 #include <sys/resource.h>
40 #include <sys/types.h>
49 using namespace GiNaC;
51 #define YYERROR_VERBOSE 1
53 #ifdef HAVE_LIBREADLINE
54 // Original readline settings
55 static int orig_completion_append_character;
56 static const char *orig_basic_word_break_characters;
58 #if (RL_VERSION_MAJOR >= 5)
59 #define GINAC_RL_COMPLETER_CAST(a) const_cast<char *>((a))
61 #define GINAC_RL_COMPLETER_CAST(a) (a)
63 #endif // HAVE_LIBREADLINE
65 // Expression stack for %, %% and %%%
66 static void push(const ex &e);
69 static exmap assigned_symbol_table;
71 // Start and end time for the time() function
73 static struct rusage start_time, end_time;
74 #define START_TIMER getrusage(RUSAGE_SELF, &start_time);
75 #define STOP_TIMER getrusage(RUSAGE_SELF, &end_time);
76 #define PRINT_TIME_USED cout << \
77 (end_time.ru_utime.tv_sec - start_time.ru_utime.tv_sec) + \
78 (end_time.ru_stime.tv_sec - start_time.ru_stime.tv_sec) + \
79 double(end_time.ru_utime.tv_usec - start_time.ru_utime.tv_usec) / 1e6 + \
80 double(end_time.ru_stime.tv_usec - start_time.ru_stime.tv_usec) / 1e6 \
83 static std::clock_t start_time, end_time;
84 #define START_TIMER start_time = std::clock();
85 #define STOP_TIMER end_time = std::clock();
86 #define PRINT_TIME_USED \
87 cout << double(end_time - start_time)/CLOCKS_PER_SEC << 's' << endl;
90 // Table of functions (a multimap, because one function may appear with different
91 // numbers of parameters)
92 typedef ex (*fcnp)(const exprseq &e);
93 typedef ex (*fcnp2)(const exprseq &e, int serial);
96 fcn_desc() : p(nullptr), num_params(0), is_ginac(false), serial(0) {}
97 fcn_desc(fcnp func, int num) : p(func), num_params(num), is_ginac(false), serial(0) {}
98 fcn_desc(fcnp2 func, int num, int ser) : p((fcnp)func), num_params(num), is_ginac(true), serial(ser) {}
100 fcnp p; // Pointer to function
101 int num_params; // Number of parameters (0 = arbitrary)
102 bool is_ginac; // Flag: function is GiNaC function
103 int serial; // GiNaC function serial number (if is_ginac == true)
106 typedef multimap<string, fcn_desc> fcn_tab;
109 static fcn_tab::const_iterator find_function(const ex &sym, int req_params);
111 // Table to map help topics to help strings
112 typedef multimap<string, string> help_tab;
113 static help_tab help;
115 static void insert_fcn_help(const char *name, const char *str);
116 static void print_help(const string &topic);
117 static void print_help_topics(void);
120 /* Tokens (T_LITERAL means a literal value returned by the parser, but not
121 of class numeric or symbol (e.g. a constant or the FAIL object)) */
122 %token T_NUMBER T_SYMBOL T_LITERAL T_DIGITS T_QUOTE T_QUOTE2 T_QUOTE3
123 %token T_EQUAL T_NOTEQ T_LESSEQ T_GREATEREQ
125 %token T_QUIT T_WARRANTY T_PRINT T_IPRINT T_PRINTLATEX T_PRINTCSRC T_TIME
126 %token T_XYZZY T_INVENTORY T_LOOK T_SCORE T_COMPLEX_SYMBOLS T_REAL_SYMBOLS
128 /* Operator precedence and associativity */
130 %left T_EQUAL T_NOTEQ
131 %left '<' '>' T_LESSEQ T_GREATEREQ
155 } catch (exception &e) {
156 cerr << e.what() << endl;
163 } catch (exception &e) {
164 std::cerr << e.what() << endl;
168 | T_PRINT '(' exp ')' ';' {
170 $3.print(print_tree(std::cout));
171 } catch (exception &e) {
172 std::cerr << e.what() << endl;
176 | T_IPRINT '(' exp ')' ';' {
179 if (!e.info(info_flags::integer))
180 throw (std::invalid_argument("argument to iprint() must be an integer"));
181 long i = ex_to<numeric>(e).to_long();
183 cout << "#o" << oct << i << endl;
184 cout << "#x" << hex << i << dec << endl;
185 } catch (exception &e) {
186 cerr << e.what() << endl;
190 | T_PRINTLATEX '(' exp ')' ';' {
192 $3.print(print_latex(std::cout)); cout << endl;
193 } catch (exception &e) {
194 std::cerr << e.what() << endl;
198 | T_PRINTCSRC '(' exp ')' ';' {
200 $3.print(print_csrc_double(std::cout)); cout << endl;
201 } catch (exception &e) {
202 std::cerr << e.what() << endl;
206 | '?' T_SYMBOL {print_help(ex_to<symbol>($2).get_name());}
207 | '?' T_TIME {print_help("time");}
208 | '?' T_PRINT {print_help("print");}
209 | '?' T_IPRINT {print_help("iprint");}
210 | '?' T_PRINTLATEX {print_help("print_latex");}
211 | '?' T_PRINTCSRC {print_help("print_csrc");}
212 | '?' '?' {print_help_topics();}
215 cout << "This program is free software; you can redistribute it and/or modify it under\n";
216 cout << "the terms of the GNU General Public License as published by the Free Software\n";
217 cout << "Foundation; either version 2 of the License, or (at your option) any later\n";
218 cout << "version.\n";
219 cout << "This program is distributed in the hope that it will be useful, but WITHOUT\n";
220 cout << "ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\n";
221 cout << "FOR A PARTICULAR PURPOSE. See the GNU General Public License for more\n";
222 cout << "details.\n";
223 cout << "You should have received a copy of the GNU General Public License along with\n";
224 cout << "this program. If not, write to the Free Software Foundation,\n";
225 cout << "51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.\n";
227 | T_XYZZY {cout << "Nothing happens.\n";}
228 | T_INVENTORY {cout << "You're not carrying anything.\n";}
229 | T_LOOK {cout << "You're in a twisty little maze of passages, all alike.\n";}
231 cout << "If you were to quit now, you would score ";
232 cout << (syms.size() > 350 ? 350 : syms.size());
233 cout << " out of a possible 350.\n";
235 | T_REAL_SYMBOLS { symboltype = domain::real; }
236 | T_COMPLEX_SYMBOLS { symboltype = domain::complex; }
237 | T_TIME { START_TIMER } '(' exp ')' { STOP_TIMER PRINT_TIME_USED }
238 | error ';' {yyclearin; yyerrok;}
239 | error ':' {yyclearin; yyerrok;}
242 exp : T_NUMBER {$$ = $1;}
244 auto i = assigned_symbol_table.find($1);
245 if (i == assigned_symbol_table.end())
250 | '\'' T_SYMBOL '\'' {$$ = $2;}
251 | T_LITERAL {$$ = $1;}
252 | T_DIGITS {$$ = $1;}
253 | T_QUOTE {$$ = exstack[0];}
254 | T_QUOTE2 {$$ = exstack[1];}
255 | T_QUOTE3 {$$ = exstack[2];}
256 | T_SYMBOL '(' exprseq ')' {
257 auto i = find_function($1, $3.nops());
258 if (i->second.is_ginac) {
259 $$ = ((fcnp2)(i->second.p))(ex_to<exprseq>($3), i->second.serial);
261 $$ = (i->second.p)(ex_to<exprseq>($3));
264 | T_DIGITS '=' T_NUMBER {$$ = $3; Digits = ex_to<numeric>($3).to_int();}
265 | T_SYMBOL '=' exp {$$ = $3; assigned_symbol_table[$1] = $3; }
266 | exp T_EQUAL exp {$$ = $1 == $3;}
267 | exp T_NOTEQ exp {$$ = $1 != $3;}
268 | exp '<' exp {$$ = $1 < $3;}
269 | exp T_LESSEQ exp {$$ = $1 <= $3;}
270 | exp '>' exp {$$ = $1 > $3;}
271 | exp T_GREATEREQ exp {$$ = $1 >= $3;}
272 | exp '+' exp {$$ = $1 + $3;}
273 | exp '-' exp {$$ = $1 - $3;}
274 | exp '*' exp {$$ = $1 * $3;}
275 | exp '/' exp {$$ = $1 / $3;}
276 | '-' exp %prec NEG {$$ = -$2;}
277 | '+' exp %prec NEG {$$ = $2;}
278 | exp '^' exp {$$ = power($1, $3);}
279 | exp '!' {$$ = factorial($1);}
280 | '(' exp ')' {$$ = $2;}
281 | '{' list_or_empty '}' {$$ = $2;}
282 | '[' matrix ']' {$$ = lst_to_matrix(ex_to<lst>($2));}
285 exprseq : exp {$$ = exprseq{$1};}
286 | exprseq ',' exp {exprseq es(ex_to<exprseq>($1)); $$ = es.append($3);}
289 list_or_empty: /* empty */ {$$ = *new lst;}
293 list : exp {$$ = lst{$1};}
294 | list ',' exp {lst l(ex_to<lst>($1)); $$ = l.append($3);}
297 matrix : '[' row ']' {$$ = lst{$2};}
298 | matrix ',' '[' row ']' {lst l(ex_to<lst>($1)); $$ = l.append($4);}
301 row : exp {$$ = lst{$1};}
302 | row ',' exp {lst l(ex_to<lst>($1)); $$ = l.append($3);}
311 // Error print routine
312 int yyerror(const char *s)
314 cerr << s << " at " << yytext << endl;
318 // Push expression "e" onto the expression stack (for ", "" and """)
319 static void push(const ex &e)
321 exstack[2] = exstack[1];
322 exstack[1] = exstack[0];
331 static ex f_collect(const exprseq &e) {return e[0].collect(e[1]);}
332 static ex f_collect_distributed(const exprseq &e) {return e[0].collect(e[1], true);}
333 static ex f_collect_common_factors(const exprseq &e) {return collect_common_factors(e[0]);}
334 static ex f_convert_H_to_Li(const exprseq &e) {return convert_H_to_Li(e[0], e[1]);}
335 static ex f_degree(const exprseq &e) {return e[0].degree(e[1]);}
336 static ex f_denom(const exprseq &e) {return e[0].denom();}
337 static ex f_evalf(const exprseq &e) {return e[0].evalf();}
338 static ex f_evalm(const exprseq &e) {return e[0].evalm();}
339 static ex f_eval_integ(const exprseq &e) {return e[0].eval_integ();}
340 static ex f_expand(const exprseq &e) {return e[0].expand();}
341 static ex f_factor(const exprseq &e) {return factor(e[0]);}
342 static ex f_gcd(const exprseq &e) {return gcd(e[0], e[1]);}
343 static ex f_has(const exprseq &e) {return e[0].has(e[1]) ? ex(1) : ex(0);}
344 static ex f_lcm(const exprseq &e) {return lcm(e[0], e[1]);}
345 static ex f_lcoeff(const exprseq &e) {return e[0].lcoeff(e[1]);}
346 static ex f_ldegree(const exprseq &e) {return e[0].ldegree(e[1]);}
347 static ex f_lsolve(const exprseq &e) {return lsolve(e[0], e[1]);}
348 static ex f_nops(const exprseq &e) {return e[0].nops();}
349 static ex f_normal(const exprseq &e) {return e[0].normal();}
350 static ex f_numer(const exprseq &e) {return e[0].numer();}
351 static ex f_numer_denom(const exprseq &e) {return e[0].numer_denom();}
352 static ex f_pow(const exprseq &e) {return pow(e[0], e[1]);}
353 static ex f_sqrt(const exprseq &e) {return sqrt(e[0]);}
354 static ex f_sqrfree1(const exprseq &e) {return sqrfree(e[0]);}
355 static ex f_subs2(const exprseq &e) {return e[0].subs(e[1]);}
356 static ex f_tcoeff(const exprseq &e) {return e[0].tcoeff(e[1]);}
358 #define CHECK_ARG(num, type, fcn) if (!is_a<type>(e[num])) throw(std::invalid_argument("argument " #num " to " #fcn "() must be a " #type))
360 static ex f_charpoly(const exprseq &e)
362 CHECK_ARG(0, matrix, charpoly);
363 return ex_to<matrix>(e[0]).charpoly(e[1]);
366 static ex f_coeff(const exprseq &e)
368 CHECK_ARG(2, numeric, coeff);
369 return e[0].coeff(e[1], ex_to<numeric>(e[2]).to_int());
372 static ex f_content(const exprseq &e)
374 return e[0].content(e[1]);
377 static ex f_decomp_rational(const exprseq &e)
379 return decomp_rational(e[0], e[1]);
382 static ex f_determinant(const exprseq &e)
384 CHECK_ARG(0, matrix, determinant);
385 return ex_to<matrix>(e[0]).determinant();
388 static ex f_diag(const exprseq &e)
390 size_t dim = e.nops();
391 matrix &m = *new matrix(dim, dim);
392 for (size_t i=0; i<dim; i++)
393 m.set(i, i, e.op(i));
397 static ex f_diff2(const exprseq &e)
399 CHECK_ARG(1, symbol, diff);
400 return e[0].diff(ex_to<symbol>(e[1]));
403 static ex f_diff3(const exprseq &e)
405 CHECK_ARG(1, symbol, diff);
406 CHECK_ARG(2, numeric, diff);
407 return e[0].diff(ex_to<symbol>(e[1]), ex_to<numeric>(e[2]).to_int());
410 static ex f_divide(const exprseq &e)
413 if (divide(e[0], e[1], q))
419 static ex f_find(const exprseq &e)
422 e[0].find(e[1], found);
424 for (auto & i : found)
429 static ex f_fsolve(const exprseq &e)
431 CHECK_ARG(1, symbol, fsolve);
432 CHECK_ARG(2, numeric, fsolve);
433 CHECK_ARG(3, numeric, fsolve);
434 return fsolve(e[0], ex_to<symbol>(e[1]), ex_to<numeric>(e[2]), ex_to<numeric>(e[3]));
437 static ex f_integer_content(const exprseq &e)
439 return e[0].expand().integer_content();
442 static ex f_integral(const exprseq &e)
444 CHECK_ARG(0, symbol, integral);
445 return GiNaC::integral(e[0], e[1], e[2], e[3]);
448 static ex f_inverse(const exprseq &e)
450 CHECK_ARG(0, matrix, inverse);
451 return ex_to<matrix>(e[0]).inverse();
454 static ex f_is(const exprseq &e)
456 CHECK_ARG(0, relational, is);
457 return (bool)ex_to<relational>(e[0]) ? ex(1) : ex(0);
460 class apply_map_function : public map_function {
463 apply_map_function(const ex & a) : apply(a) {}
464 virtual ~apply_map_function() {}
465 ex operator()(const ex & e) override { return apply.subs(wild() == e, true); }
468 static ex f_map(const exprseq &e)
470 apply_map_function fcn(e[1]);
471 return e[0].map(fcn);
474 static ex f_match(const exprseq &e)
477 if (e[0].match(e[1], repls)) {
479 for (auto & i : repls)
480 repl_lst.append(relational(i.first, i.second, relational::equal));
483 throw std::runtime_error("FAIL");
486 static ex f_op(const exprseq &e)
488 CHECK_ARG(1, numeric, op);
489 int n = ex_to<numeric>(e[1]).to_int();
490 if (n < 0 || n >= (int)e[0].nops())
491 throw(std::out_of_range("second argument to op() is out of range"));
495 static ex f_prem(const exprseq &e)
497 return prem(e[0], e[1], e[2]);
500 static ex f_primpart(const exprseq &e)
502 return e[0].primpart(e[1]);
505 static ex f_quo(const exprseq &e)
507 return quo(e[0], e[1], e[2]);
510 static ex f_rank(const exprseq &e)
512 CHECK_ARG(0, matrix, rank);
513 return ex_to<matrix>(e[0]).rank();
516 static ex f_rem(const exprseq &e)
518 return rem(e[0], e[1], e[2]);
521 static ex f_resultant(const exprseq &e)
523 CHECK_ARG(2, symbol, resultant);
524 return resultant(e[0], e[1], ex_to<symbol>(e[2]));
527 static ex f_series(const exprseq &e)
529 CHECK_ARG(2, numeric, series);
530 return e[0].series(e[1], ex_to<numeric>(e[2]).to_int());
533 static ex f_sprem(const exprseq &e)
535 return sprem(e[0], e[1], e[2]);
538 static ex f_sqrfree2(const exprseq &e)
540 CHECK_ARG(1, lst, sqrfree);
541 return sqrfree(e[0], ex_to<lst>(e[1]));
544 static ex f_subs3(const exprseq &e)
546 CHECK_ARG(1, lst, subs);
547 CHECK_ARG(2, lst, subs);
548 return e[0].subs(ex_to<lst>(e[1]), ex_to<lst>(e[2]));
551 static ex f_trace(const exprseq &e)
553 CHECK_ARG(0, matrix, trace);
554 return ex_to<matrix>(e[0]).trace();
557 static ex f_transpose(const exprseq &e)
559 CHECK_ARG(0, matrix, transpose);
560 return ex_to<matrix>(e[0]).transpose();
563 static ex f_unassign(const exprseq &e)
565 CHECK_ARG(0, symbol, unassign);
566 exmap::iterator i = assigned_symbol_table.find(e[0]);
567 if (i != assigned_symbol_table.end())
568 assigned_symbol_table.erase(i);
572 static ex f_unit(const exprseq &e)
574 return e[0].unit(e[1]);
577 static ex f_dummy(const exprseq &e)
579 throw(std::logic_error("dummy function called (shouldn't happen)"));
582 // Tables for initializing the "fcns" map and the function help topics
589 static const fcn_init builtin_fcns[] = {
590 {"charpoly", f_charpoly, 2},
591 {"coeff", f_coeff, 3},
592 {"collect", f_collect, 2},
593 {"collect_common_factors", f_collect_common_factors, 1},
594 {"collect_distributed", f_collect_distributed, 2},
595 {"content", f_content, 2},
596 {"convert_H_to_Li", f_convert_H_to_Li, 2},
597 {"decomp_rational", f_decomp_rational, 2},
598 {"degree", f_degree, 2},
599 {"denom", f_denom, 1},
600 {"determinant", f_determinant, 1},
602 {"diff", f_diff2, 2},
603 {"diff", f_diff3, 3},
604 {"divide", f_divide, 2},
605 {"evalf", f_evalf, 1},
606 {"evalm", f_evalm, 1},
607 {"eval_integ", f_eval_integ, 1},
608 {"expand", f_expand, 1},
609 {"factor", f_factor, 1},
611 {"fsolve", f_fsolve, 4},
614 {"integer_content", f_integer_content, 1},
615 {"integral", f_integral, 4},
616 {"inverse", f_inverse, 1},
617 {"iprint", f_dummy, 0}, // for Tab-completion
620 {"lcoeff", f_lcoeff, 2},
621 {"ldegree", f_ldegree, 2},
622 {"lsolve", f_lsolve, 2},
624 {"match", f_match, 2},
626 {"normal", f_normal, 1},
627 {"numer", f_numer, 1},
628 {"numer_denom", f_numer_denom, 1},
632 {"primpart", f_primpart, 2},
633 {"print", f_dummy, 0}, // for Tab-completion
634 {"print_csrc", f_dummy, 0}, // for Tab-completion
635 {"print_latex", f_dummy, 0}, // for Tab-completion
639 {"resultant", f_resultant, 3},
640 {"series", f_series, 3},
641 {"sprem", f_sprem, 3},
642 {"sqrfree", f_sqrfree1, 1},
643 {"sqrfree", f_sqrfree2, 2},
645 {"subs", f_subs2, 2},
646 {"subs", f_subs3, 3},
647 {"tcoeff", f_tcoeff, 2},
648 {"time", f_dummy, 0}, // for Tab-completion
649 {"trace", f_trace, 1},
650 {"transpose", f_transpose, 1},
651 {"unassign", f_unassign, 1},
653 {nullptr, f_dummy, 0} // End marker
656 struct fcn_help_init {
661 static const fcn_help_init builtin_help[] = {
662 {"acos", "inverse cosine function"},
663 {"acosh", "inverse hyperbolic cosine function"},
664 {"asin", "inverse sine function"},
665 {"asinh", "inverse hyperbolic sine function"},
666 {"atan", "inverse tangent function"},
667 {"atan2", "inverse tangent function with two arguments"},
668 {"atanh", "inverse hyperbolic tangent function"},
669 {"beta", "Beta function"},
670 {"binomial", "binomial function"},
671 {"cos", "cosine function"},
672 {"cosh", "hyperbolic cosine function"},
673 {"exp", "exponential function"},
674 {"factorial", "factorial function"},
675 {"lgamma", "natural logarithm of Gamma function"},
676 {"tgamma", "Gamma function"},
677 {"log", "natural logarithm"},
678 {"psi", "psi function\npsi(x) is the digamma function, psi(n,x) the nth polygamma function"},
679 {"sin", "sine function"},
680 {"sinh", "hyperbolic sine function"},
681 {"tan", "tangent function"},
682 {"tanh", "hyperbolic tangent function"},
683 {"zeta", "zeta function\nzeta(x) is Riemann's zeta function, zetaderiv(n,x) its nth derivative.\nIf x is a GiNaC::lst, it is a multiple zeta value\nzeta(x,s) is an alternating Euler sum"},
684 {"Li2", "dilogarithm"},
685 {"Li3", "trilogarithm"},
686 {"Li", "(multiple) polylogarithm"},
687 {"S", "Nielsen's generalized polylogarithm"},
688 {"H", "harmonic polylogarithm"},
689 {"Order", "order term function (for truncated power series)"},
690 {"Derivative", "inert differential operator"},
691 {nullptr, nullptr} // End marker
694 #include "ginsh_extensions.h"
698 * Add functions to ginsh
701 // Functions from fcn_init array
702 static void insert_fcns(const fcn_init *p)
705 fcns.insert(make_pair(string(p->name), fcn_desc(p->p, p->num_params)));
710 static ex f_ginac_function(const exprseq &es, int serial)
712 return GiNaC::function(serial, es);
715 // All registered GiNaC functions
717 static void ginsh_get_ginac_functions(void)
720 for (auto & i : function::get_registered_functions()) {
721 fcns.insert(make_pair(i.get_name(), fcn_desc(f_ginac_function, i.get_nparams(), serial)));
729 * Find a function given a name and number of parameters. Throw exceptions on error.
732 static fcn_tab::const_iterator find_function(const ex &sym, int req_params)
734 const string &name = ex_to<symbol>(sym).get_name();
735 typedef fcn_tab::const_iterator I;
736 pair<I, I> b = fcns.equal_range(name);
737 if (b.first == b.second)
738 throw(std::logic_error("unknown function '" + name + "'"));
740 for (I i=b.first; i!=b.second; i++)
741 if ((i->second.num_params == 0) || (i->second.num_params == req_params))
744 throw(std::logic_error("invalid number of arguments to " + name + "()"));
749 * Insert help strings
752 // Normal help string
753 static void insert_help(const char *topic, const char *str)
755 help.insert(make_pair(string(topic), string(str)));
758 // Help string for functions, automatically generates synopsis
759 static void insert_fcn_help(const char *name, const char *str)
761 typedef fcn_tab::const_iterator I;
762 pair<I, I> b = fcns.equal_range(name);
763 if (b.first != b.second) {
764 string help_str = string(name) + "(";
765 for (int i=0; i<b.first->second.num_params; i++) {
768 help_str += "expression";
772 help.insert(make_pair(string(name), help_str));
776 // Help strings for functions from fcn_help_init array
777 static void insert_help(const fcn_help_init *p)
780 insert_fcn_help(p->name, p->help);
790 // Help for a given topic
791 static void print_help(const string &topic)
793 typedef help_tab::const_iterator I;
794 pair<I, I> b = help.equal_range(topic);
795 if (b.first == b.second)
796 cout << "no help for '" << topic << "'\n";
798 for (I i=b.first; i!=b.second; i++)
799 cout << i->second << endl;
803 // List of help topics
804 static void print_help_topics(void)
806 cout << "Available help topics:\n";
807 help_tab::const_iterator i;
808 string last_name = string("*");
810 for (i=help.begin(); i!=help.end(); i++) {
811 // Don't print duplicates
812 if (i->first != last_name) {
817 last_name = i->first;
820 cout << "\nTo get help for a certain topic, type ?topic\n";
825 * Function name completion functions for readline
828 static char *fcn_generator(const char *text, int state)
830 static int len; // Length of word to complete
831 static fcn_tab::const_iterator index; // Iterator to function being currently considered
833 // If this is a new word to complete, initialize now
835 index = fcns.begin();
839 // Return the next function which partially matches
840 while (index != fcns.end()) {
841 const char *fcn_name = index->first.c_str();
843 if (strncmp(fcn_name, text, len) == 0)
844 return strdup(fcn_name);
849 #ifdef HAVE_LIBREADLINE
850 static char **fcn_completion(const char *text, int start, int end)
852 if (rl_line_buffer[0] == '!') {
853 // For shell commands, revert back to filename completion
854 rl_completion_append_character = orig_completion_append_character;
855 rl_basic_word_break_characters = orig_basic_word_break_characters;
856 rl_completer_word_break_characters = GINAC_RL_COMPLETER_CAST(rl_basic_word_break_characters);
857 return rl_completion_matches(text, rl_filename_completion_function);
859 // Otherwise, complete function names
860 rl_completion_append_character = '(';
861 rl_basic_word_break_characters = " \t\n\"#$%&'()*+,-./:;<=>?@[\\]^`{|}~";
862 rl_completer_word_break_characters = GINAC_RL_COMPLETER_CAST(rl_basic_word_break_characters);
863 return rl_completion_matches(text, fcn_generator);
866 #endif // HAVE_LIBREADLINE
868 static void ginsh_readline_init(char* name)
870 #ifdef HAVE_LIBREADLINE
871 // Init readline completer
872 rl_readline_name = name;
873 rl_attempted_completion_function = fcn_completion;
874 orig_completion_append_character = rl_completion_append_character;
875 orig_basic_word_break_characters = rl_basic_word_break_characters;
876 #endif // HAVE_LIBREADLINE
881 cout << "ginsh - GiNaC Interactive Shell (GiNaC V" << GINACLIB_VERSION << ")" << endl;
882 cout << " __, _______ Copyright (C) 1999-2020 Johannes Gutenberg University Mainz,\n"
883 << " (__) * | Germany. This is free software with ABSOLUTELY NO WARRANTY.\n"
884 << " ._) i N a C | You are welcome to redistribute it under certain conditions.\n"
885 << "<-------------' For details type `warranty;'.\n" << endl;
886 cout << "Type ?? for a list of help topics." << endl;
893 int main(int argc, char **argv)
895 // Print banner in interactive mode
898 assigned_symbol_table = exmap();
900 // Init function table
901 insert_fcns(builtin_fcns);
902 insert_fcns(extended_fcns);
903 ginsh_get_ginac_functions();
905 // Init help for operators (automatically generated from man page)
906 insert_help("operators", "Operators in falling order of precedence:");
907 #include "ginsh_op_help.h"
909 // Init help for built-in functions (automatically generated from man page)
910 #include "ginsh_fcn_help.h"
912 // Help for GiNaC functions is added manually
913 insert_help(builtin_help);
914 insert_help(extended_help);
916 // Help for other keywords
917 insert_help("print", "print(expression) - dumps the internal structure of the given expression (for debugging)");
918 insert_help("iprint", "iprint(expression) - prints the given integer expression in decimal, octal, and hexadecimal bases");
919 insert_help("print_latex", "print_latex(expression) - prints a LaTeX representation of the given expression");
920 insert_help("print_csrc", "print_csrc(expression) - prints a C source code representation of the given expression");
922 ginsh_readline_init(argv[0]);
924 // Init input file list, open first file
925 num_files = argc - 1;
926 file_list = argv + 1;
928 yyin = fopen(*file_list, "r");
929 if (yyin == nullptr) {
930 cerr << "Can't open " << *file_list << endl;
937 // Parse input, catch all remaining exceptions
941 } catch (exception &e) {
942 cerr << e.what() << endl;