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0895858d8e
* doc/bison.texi: Formatting changes. * src/gram.h, src/gram.c (nvars): Rename as... (nnterms): this. Adjust dependencies. (section): New. Use it. Replace "non terminal" and "non-terminal" by "nonterminal".
72 lines
2.3 KiB
C
72 lines
2.3 KiB
C
/* Counterexample derivation trees
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Copyright (C) 2020 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef DERIVATION_H
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# define DERIVATION_H
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# include <gl_linked_list.h>
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# include <gl_xlist.h>
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# include "gram.h"
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/* Derivations are trees of symbols such that each nonterminal's
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children are symbols that produce that nonterminal if they are
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relevant to the counterexample. The leaves of a derivation form a
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counterexample when printed. */
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typedef gl_list_t derivation_list;
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typedef struct derivation derivation;
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static inline derivation_list derivation_list_new (void)
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{
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return gl_list_create_empty (GL_LINKED_LIST, NULL, NULL, NULL, true);
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}
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static inline bool
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derivation_list_next (gl_list_iterator_t *it, derivation **d)
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{
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const void *p = NULL;
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bool res = gl_list_iterator_next (it, &p, NULL);
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if (res)
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*d = (derivation *) p;
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else
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gl_list_iterator_free (it);
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return res;
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}
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void derivation_list_append (derivation_list dl, derivation *d);
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void derivation_list_prepend (derivation_list dl, derivation *d);
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void derivation_list_free (derivation_list dl);
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derivation *derivation_new (symbol_number sym, derivation_list children);
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static inline derivation *derivation_new_leaf (symbol_number sym)
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{
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return derivation_new (sym, NULL);
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}
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size_t derivation_size (const derivation *deriv);
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void derivation_print (const derivation *deriv, FILE *out, const char *prefix);
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void derivation_print_leaves (const derivation *deriv, FILE *out, const char *prefix);
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void derivation_free (derivation *deriv);
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void derivation_retain (derivation *deriv);
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derivation *derivation_dot (void);
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#endif /* DERIVATION_H */
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