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99027e3c MD |
1 | /* Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc. |
2 | * | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, | |
16 | * Boston, MA 02111-1307 USA | |
17 | * | |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
40 | * If you do not wish that, delete this exception notice. */ | |
1bbd0b84 GB |
41 | |
42 | /* Software engineering face-lift by Greg J. Badros, 11-Dec-1999, | |
43 | gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */ | |
44 | ||
99027e3c MD |
45 | \f |
46 | ||
47 | #include "_scm.h" | |
48 | #include "smob.h" | |
49 | ||
1bbd0b84 | 50 | #include "scm_validate.h" |
99027e3c MD |
51 | #include "macros.h" |
52 | ||
53 | long scm_tc16_macro; | |
54 | ||
1bbd0b84 GB |
55 | GUILE_PROC (scm_makacro, "procedure->syntax", 1, 0, 0, |
56 | (SCM code), | |
57 | "") | |
58 | #define FUNC_NAME s_scm_makacro | |
99027e3c | 59 | { |
1bbd0b84 | 60 | SCM_VALIDATE_PROC(1,code); |
23a62151 | 61 | SCM_RETURN_NEWSMOB (scm_tc16_macro, code); |
99027e3c | 62 | } |
1bbd0b84 | 63 | #undef FUNC_NAME |
99027e3c MD |
64 | |
65 | ||
1bbd0b84 GB |
66 | GUILE_PROC(scm_makmacro, "procedure->macro", 1, 0, 0, |
67 | (SCM code), | |
68 | "") | |
69 | #define FUNC_NAME s_scm_makmacro | |
99027e3c | 70 | { |
1bbd0b84 | 71 | SCM_VALIDATE_PROC(1,code); |
23a62151 | 72 | SCM_RETURN_NEWSMOB (scm_tc16_macro | (1L << 16), code); |
99027e3c | 73 | } |
1bbd0b84 | 74 | #undef FUNC_NAME |
99027e3c MD |
75 | |
76 | ||
1bbd0b84 GB |
77 | GUILE_PROC(scm_makmmacro, "procedure->memoizing-macro", 1, 0, 0, |
78 | (SCM code), | |
79 | "") | |
80 | #define FUNC_NAME s_scm_makmmacro | |
99027e3c | 81 | { |
1bbd0b84 | 82 | SCM_VALIDATE_PROC(1,code); |
23a62151 | 83 | SCM_RETURN_NEWSMOB (scm_tc16_macro | (2L << 16), code); |
99027e3c | 84 | } |
1bbd0b84 | 85 | #undef FUNC_NAME |
99027e3c MD |
86 | |
87 | ||
1bbd0b84 GB |
88 | GUILE_PROC (scm_macro_p, "macro?", 1, 0, 0, |
89 | (SCM obj), | |
4079f87e GB |
90 | "Return @code{#t} if @var{obj} is a regular macro, a memoizing macro or a |
91 | syntax transformer.") | |
1bbd0b84 | 92 | #define FUNC_NAME s_scm_macro_p |
99027e3c | 93 | { |
1bbd0b84 | 94 | return SCM_BOOL(SCM_NIMP (obj) && SCM_TYP16 (obj) == scm_tc16_macro); |
99027e3c | 95 | } |
1bbd0b84 | 96 | #undef FUNC_NAME |
99027e3c MD |
97 | |
98 | ||
99 | SCM_SYMBOL (scm_sym_syntax, "syntax"); | |
100 | SCM_SYMBOL (scm_sym_macro, "macro"); | |
101 | SCM_SYMBOL (scm_sym_mmacro, "macro!"); | |
102 | ||
1bbd0b84 GB |
103 | GUILE_PROC (scm_macro_type, "macro-type", 1, 0, 0, |
104 | (SCM m), | |
4079f87e GB |
105 | "Return one of the symbols @code{syntax}, @code{macro} or @code{macro!}, |
106 | depending on whether @var{obj} is a syntax tranformer, a regular macro, | |
107 | or a memoizing macro, respectively. If @var{obj} is not a macro, | |
108 | @code{#f} is returned.") | |
1bbd0b84 | 109 | #define FUNC_NAME s_scm_macro_type |
99027e3c MD |
110 | { |
111 | if (!(SCM_NIMP (m) && SCM_TYP16 (m) == scm_tc16_macro)) | |
112 | return SCM_BOOL_F; | |
113 | switch ((int) (SCM_CAR (m) >> 16)) | |
114 | { | |
115 | case 0: return scm_sym_syntax; | |
116 | case 1: return scm_sym_macro; | |
117 | case 2: return scm_sym_mmacro; | |
1bbd0b84 | 118 | default: scm_wrong_type_arg (FUNC_NAME, 1, m); |
99027e3c MD |
119 | } |
120 | } | |
1bbd0b84 | 121 | #undef FUNC_NAME |
99027e3c MD |
122 | |
123 | ||
1bbd0b84 GB |
124 | GUILE_PROC (scm_macro_name, "macro-name", 1, 0, 0, |
125 | (SCM m), | |
126 | "") | |
127 | #define FUNC_NAME s_scm_macro_name | |
99027e3c | 128 | { |
1bbd0b84 | 129 | SCM_VALIDATE_SMOB(1,m,macro); |
99027e3c MD |
130 | return scm_procedure_name (SCM_CDR (m)); |
131 | } | |
1bbd0b84 | 132 | #undef FUNC_NAME |
99027e3c MD |
133 | |
134 | ||
1bbd0b84 GB |
135 | GUILE_PROC (scm_macro_transformer, "macro-transformer", 1, 0, 0, |
136 | (SCM m), | |
137 | "") | |
138 | #define FUNC_NAME s_scm_macro_transformer | |
99027e3c | 139 | { |
1bbd0b84 | 140 | SCM_VALIDATE_SMOB(1,m,macro); |
99027e3c MD |
141 | return SCM_CLOSUREP (SCM_CDR (m)) ? SCM_CDR (m) : SCM_BOOL_F; |
142 | } | |
1bbd0b84 | 143 | #undef FUNC_NAME |
99027e3c MD |
144 | |
145 | SCM | |
1bbd0b84 | 146 | scm_make_synt (const char *name, SCM (*macroizer) (), SCM (*fcn)() ) |
99027e3c MD |
147 | { |
148 | SCM symcell = scm_sysintern (name, SCM_UNDEFINED); | |
149 | long tmp = ((((SCM_CELLPTR) (SCM_CAR (symcell))) - scm_heap_org) << 8); | |
150 | register SCM z; | |
151 | if ((tmp >> 8) != ((SCM_CELLPTR) (SCM_CAR (symcell)) - scm_heap_org)) | |
152 | tmp = 0; | |
153 | SCM_NEWCELL (z); | |
154 | SCM_SUBRF (z) = fcn; | |
155 | SCM_SETCAR (z, tmp + scm_tc7_subr_2); | |
156 | SCM_SETCDR (symcell, macroizer (z)); | |
157 | return SCM_CAR (symcell); | |
158 | } | |
159 | ||
160 | void | |
161 | scm_init_macros () | |
162 | { | |
23a62151 MD |
163 | scm_tc16_macro = scm_make_smob_type_mfpe ("macro", 0, |
164 | scm_markcdr, NULL, NULL, NULL); | |
99027e3c MD |
165 | #include "macros.x" |
166 | } |