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Diffstat (limited to 'libguile/syntax.c')
-rw-r--r-- | libguile/syntax.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/libguile/syntax.c b/libguile/syntax.c new file mode 100644 index 000000000..df12c69c4 --- /dev/null +++ b/libguile/syntax.c @@ -0,0 +1,120 @@ +/* Copyright (C) 2017 Free Software Foundation, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * as published by the Free Software Foundation; either version 3 of + * the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + + + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include "libguile/_scm.h" +#include "libguile/keywords.h" +#include "libguile/ports.h" +#include "libguile/syntax.h" +#include "libguile/validate.h" + + + +static int +scm_is_syntax (SCM x) +{ + return SCM_HAS_TYP7 (x, scm_tc7_syntax); +} + +#define SCM_VALIDATE_SYNTAX(pos, scm) \ + SCM_I_MAKE_VALIDATE_MSG2 (pos, scm, scm_is_syntax, "syntax object") + +SCM_DEFINE (scm_syntax_p, "syntax?", 1, 0, 0, + (SCM obj), + "Return @code{#t} if the argument @var{obj} is a syntax object,\n" + "else @code{#f}.") +#define FUNC_NAME s_scm_syntax_p +{ + return scm_from_bool (scm_is_syntax (obj)); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_make_syntax, "make-syntax", 3, 0, 0, + (SCM exp, SCM wrap, SCM module), + "Make a new syntax object.") +#define FUNC_NAME s_scm_make_syntax +{ + return scm_double_cell (scm_tc7_syntax, SCM_UNPACK (exp), + SCM_UNPACK (wrap), SCM_UNPACK (module)); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_syntax_expression, "syntax-expression", 1, 0, 0, + (SCM obj), + "Return the expression contained in the syntax object @var{obj}.") +#define FUNC_NAME s_scm_syntax_expression +{ + SCM_VALIDATE_SYNTAX (1, obj); + return SCM_CELL_OBJECT_1 (obj); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_syntax_wrap, "syntax-wrap", 1, 0, 0, + (SCM obj), + "Return the wrap contained in the syntax object @var{obj}.") +#define FUNC_NAME s_scm_syntax_wrap +{ + SCM_VALIDATE_SYNTAX (1, obj); + return SCM_CELL_OBJECT_2 (obj); +} +#undef FUNC_NAME + +SCM_DEFINE (scm_syntax_module, "syntax-module", 1, 0, 0, + (SCM obj), + "Return the module info contained in the syntax object @var{obj}.") +#define FUNC_NAME s_scm_syntax_module +{ + SCM_VALIDATE_SYNTAX (1, obj); + return SCM_CELL_OBJECT_3 (obj); +} +#undef FUNC_NAME + +static SCM print_syntax_var; + +static void +init_print_syntax_var (void) +{ + print_syntax_var = + scm_c_private_variable ("system syntax", "print-syntax"); +} + +void +scm_i_syntax_print (SCM obj, SCM port, scm_print_state *pstate) +{ + static scm_i_pthread_once_t once = SCM_I_PTHREAD_ONCE_INIT; + scm_i_pthread_once (&once, init_print_syntax_var); + scm_call_2 (scm_variable_ref (print_syntax_var), obj, port); +} + +void +scm_init_syntax () +{ +#include "libguile/syntax.x" +} + + +/* + Local Variables: + c-file-style: "gnu" + End: +*/ |