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fbb857a4 | 1 | /* Copyright (C) 1995,1996,1997,1998,2000,2001,2002,2003, 2006, 2008, 2009 Free Software Foundation, Inc. |
99027e3c | 2 | * |
73be1d9e | 3 | * This library is free software; you can redistribute it and/or |
53befeb7 NJ |
4 | * modify it under the terms of the GNU Lesser General Public License |
5 | * as published by the Free Software Foundation; either version 3 of | |
6 | * the License, or (at your option) any later version. | |
99027e3c | 7 | * |
53befeb7 NJ |
8 | * This library is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
73be1d9e MV |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | * Lesser General Public License for more details. | |
99027e3c | 12 | * |
73be1d9e MV |
13 | * You should have received a copy of the GNU Lesser General Public |
14 | * License along with this library; if not, write to the Free Software | |
53befeb7 NJ |
15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
16 | * 02110-1301 USA | |
73be1d9e | 17 | */ |
1bbd0b84 | 18 | |
1bbd0b84 | 19 | |
99027e3c | 20 | \f |
dbb605f5 LC |
21 | #ifdef HAVE_CONFIG_H |
22 | # include <config.h> | |
23 | #endif | |
99027e3c | 24 | |
a0599745 | 25 | #include "libguile/_scm.h" |
726d810a DH |
26 | #include "libguile/alist.h" /* for SCM_EXTEND_ENV (well...) */ |
27 | #include "libguile/eval.h" | |
28 | #include "libguile/ports.h" | |
29 | #include "libguile/print.h" | |
a0599745 MD |
30 | #include "libguile/root.h" |
31 | #include "libguile/smob.h" | |
1d1559ce | 32 | #include "libguile/deprecation.h" |
99027e3c | 33 | |
a0599745 | 34 | #include "libguile/validate.h" |
3633ff4e | 35 | #include "libguile/programs.h" |
a0599745 | 36 | #include "libguile/macros.h" |
99027e3c | 37 | |
22fc179a HWN |
38 | #include "libguile/private-options.h" |
39 | ||
92c2555f | 40 | scm_t_bits scm_tc16_macro; |
99027e3c | 41 | |
726d810a DH |
42 | |
43 | static int | |
44 | macro_print (SCM macro, SCM port, scm_print_state *pstate) | |
45 | { | |
46 | SCM code = SCM_MACRO_CODE (macro); | |
47 | if (!SCM_CLOSUREP (code) | |
7888309b MV |
48 | || scm_is_false (scm_procedure_p (SCM_PRINT_CLOSURE)) |
49 | || scm_is_false (scm_printer_apply (SCM_PRINT_CLOSURE, | |
726d810a DH |
50 | macro, port, pstate))) |
51 | { | |
5a0132b3 AW |
52 | scm_puts ("#<", port); |
53 | ||
54 | if (SCM_MACRO_TYPE (macro) < 4 && SCM_MACRO_IS_EXTENDED (macro)) | |
55 | scm_puts ("extended-", port); | |
56 | ||
3633ff4e | 57 | if (!SCM_CLOSUREP (code) && !SCM_PROGRAM_P (code)) |
5a0132b3 | 58 | scm_puts ("primitive-", port); |
726d810a DH |
59 | |
60 | if (SCM_MACRO_TYPE (macro) == 0) | |
61 | scm_puts ("syntax", port); | |
3063e30a DH |
62 | #if SCM_ENABLE_DEPRECATED == 1 |
63 | if (SCM_MACRO_TYPE (macro) == 1) | |
726d810a | 64 | scm_puts ("macro", port); |
3063e30a | 65 | #endif |
726d810a DH |
66 | if (SCM_MACRO_TYPE (macro) == 2) |
67 | scm_puts ("macro!", port); | |
3b88ed2a DH |
68 | if (SCM_MACRO_TYPE (macro) == 3) |
69 | scm_puts ("builtin-macro!", port); | |
5a0132b3 AW |
70 | if (SCM_MACRO_TYPE (macro) == 4) |
71 | scm_puts ("syncase-macro", port); | |
3b88ed2a | 72 | |
726d810a DH |
73 | scm_putc (' ', port); |
74 | scm_iprin1 (scm_macro_name (macro), port, pstate); | |
75 | ||
76 | if (SCM_CLOSUREP (code) && SCM_PRINT_SOURCE_P) | |
77 | { | |
78 | SCM formals = SCM_CLOSURE_FORMALS (code); | |
79 | SCM env = SCM_ENV (code); | |
80 | SCM xenv = SCM_EXTEND_ENV (formals, SCM_EOL, env); | |
9fcf3cbb | 81 | SCM src = scm_i_unmemocopy_body (SCM_CODE (code), xenv); |
726d810a DH |
82 | scm_putc (' ', port); |
83 | scm_iprin1 (src, port, pstate); | |
84 | } | |
85 | ||
5a0132b3 AW |
86 | if (SCM_MACRO_IS_EXTENDED (macro)) |
87 | { | |
88 | scm_putc (' ', port); | |
89 | scm_write (SCM_SMOB_OBJECT_2 (macro), port); | |
90 | scm_putc (' ', port); | |
91 | scm_write (SCM_SMOB_OBJECT_3 (macro), port); | |
92 | } | |
93 | ||
726d810a DH |
94 | scm_putc ('>', port); |
95 | } | |
96 | ||
97 | return 1; | |
98 | } | |
99 | ||
f5710d53 MV |
100 | static SCM |
101 | makmac (SCM code, scm_t_bits flags) | |
102 | { | |
103 | SCM z; | |
104 | SCM_NEWSMOB (z, scm_tc16_macro, SCM_UNPACK (code)); | |
105 | SCM_SET_SMOB_FLAGS (z, flags); | |
106 | return z; | |
107 | } | |
726d810a | 108 | |
3b88ed2a DH |
109 | /* Return a mmacro that is known to be one of guile's built in macros. */ |
110 | SCM | |
111 | scm_i_makbimacro (SCM code) | |
112 | #define FUNC_NAME "scm_i_makbimacro" | |
113 | { | |
114 | SCM_VALIDATE_PROC (1, code); | |
f5710d53 | 115 | return makmac (code, 3); |
3b88ed2a DH |
116 | } |
117 | #undef FUNC_NAME | |
118 | ||
119 | ||
120 | SCM_DEFINE (scm_makmmacro, "procedure->memoizing-macro", 1, 0, 0, | |
121 | (SCM code), | |
122 | "Return a @dfn{macro} which, when a symbol defined to this value\n" | |
123 | "appears as the first symbol in an expression, evaluates the\n" | |
124 | "result of applying @var{code} to the expression and the\n" | |
125 | "environment.\n\n" | |
126 | "@code{procedure->memoizing-macro} is the same as\n" | |
127 | "@code{procedure->macro}, except that the expression returned by\n" | |
128 | "@var{code} replaces the original macro expression in the memoized\n" | |
129 | "form of the containing code.") | |
130 | #define FUNC_NAME s_scm_makmmacro | |
131 | { | |
132 | SCM_VALIDATE_PROC (1, code); | |
f5710d53 | 133 | return makmac (code, 2); |
3b88ed2a DH |
134 | } |
135 | #undef FUNC_NAME | |
136 | ||
137 | ||
a1ec6916 | 138 | SCM_DEFINE (scm_makacro, "procedure->syntax", 1, 0, 0, |
1bbd0b84 | 139 | (SCM code), |
1e6808ea MG |
140 | "Return a @dfn{macro} which, when a symbol defined to this value\n" |
141 | "appears as the first symbol in an expression, returns the\n" | |
142 | "result of applying @var{code} to the expression and the\n" | |
143 | "environment.") | |
1bbd0b84 | 144 | #define FUNC_NAME s_scm_makacro |
99027e3c | 145 | { |
34d19ef6 | 146 | SCM_VALIDATE_PROC (1, code); |
f5710d53 | 147 | return makmac (code, 0); |
99027e3c | 148 | } |
1bbd0b84 | 149 | #undef FUNC_NAME |
99027e3c MD |
150 | |
151 | ||
3063e30a DH |
152 | #if SCM_ENABLE_DEPRECATED == 1 |
153 | ||
3b3b36dd | 154 | SCM_DEFINE (scm_makmacro, "procedure->macro", 1, 0, 0, |
1bbd0b84 | 155 | (SCM code), |
1e6808ea MG |
156 | "Return a @dfn{macro} which, when a symbol defined to this value\n" |
157 | "appears as the first symbol in an expression, evaluates the\n" | |
158 | "result of applying @var{code} to the expression and the\n" | |
bb2c02f2 | 159 | "environment. For example:\n" |
1e6808ea MG |
160 | "\n" |
161 | "@lisp\n" | |
872e0c72 NJ |
162 | "(define trace\n" |
163 | " (procedure->macro\n" | |
164 | " (lambda (x env) `(set! ,(cadr x) (tracef ,(cadr x) ',(cadr x))))))\n\n" | |
165 | "(trace @i{foo}) @equiv{} (set! @i{foo} (tracef @i{foo} '@i{foo})).\n" | |
1e6808ea | 166 | "@end lisp") |
1bbd0b84 | 167 | #define FUNC_NAME s_scm_makmacro |
99027e3c | 168 | { |
3063e30a DH |
169 | scm_c_issue_deprecation_warning |
170 | ("The function procedure->macro is deprecated, and so are" | |
171 | " non-memoizing macros in general. Use memoizing macros" | |
172 | " or r5rs macros instead."); | |
173 | ||
34d19ef6 | 174 | SCM_VALIDATE_PROC (1, code); |
f5710d53 | 175 | return makmac (code, 1); |
99027e3c | 176 | } |
1bbd0b84 | 177 | #undef FUNC_NAME |
99027e3c | 178 | |
3063e30a DH |
179 | #endif |
180 | ||
5a0132b3 AW |
181 | SCM_DEFINE (scm_make_syncase_macro, "make-syncase-macro", 2, 0, 0, |
182 | (SCM type, SCM binding), | |
183 | "Return a @dfn{macro} that requires expansion by syntax-case.\n" | |
184 | "While users should not call this function, it is useful to know\n" | |
185 | "that syntax-case macros are represented as Guile primitive macros.") | |
186 | #define FUNC_NAME s_scm_make_syncase_macro | |
187 | { | |
188 | SCM z; | |
189 | SCM_VALIDATE_SYMBOL (1, type); | |
190 | ||
191 | SCM_NEWSMOB3 (z, scm_tc16_macro, SCM_UNPACK (binding), SCM_UNPACK (type), | |
192 | SCM_UNPACK (binding)); | |
193 | SCM_SET_SMOB_FLAGS (z, 4 | SCM_F_MACRO_EXTENDED); | |
194 | return z; | |
195 | } | |
196 | #undef FUNC_NAME | |
197 | ||
198 | SCM_DEFINE (scm_make_extended_syncase_macro, "make-extended-syncase-macro", 3, 0, 0, | |
199 | (SCM m, SCM type, SCM binding), | |
200 | "Extend a core macro @var{m} with a syntax-case binding.") | |
201 | #define FUNC_NAME s_scm_make_extended_syncase_macro | |
202 | { | |
203 | SCM z; | |
204 | SCM_VALIDATE_SMOB (1, m, macro); | |
205 | SCM_VALIDATE_SYMBOL (2, type); | |
206 | ||
207 | SCM_NEWSMOB3 (z, scm_tc16_macro, SCM_SMOB_DATA (m), SCM_UNPACK (type), | |
208 | SCM_UNPACK (binding)); | |
209 | SCM_SET_SMOB_FLAGS (z, SCM_SMOB_FLAGS (m) | SCM_F_MACRO_EXTENDED); | |
210 | return z; | |
211 | } | |
212 | #undef FUNC_NAME | |
213 | ||
214 | ||
99027e3c | 215 | |
a1ec6916 | 216 | SCM_DEFINE (scm_macro_p, "macro?", 1, 0, 0, |
1bbd0b84 | 217 | (SCM obj), |
3d5f3091 AW |
218 | "Return @code{#t} if @var{obj} is a regular macro, a memoizing macro, a\n" |
219 | "syntax transformer, or a syntax-case macro.") | |
1bbd0b84 | 220 | #define FUNC_NAME s_scm_macro_p |
99027e3c | 221 | { |
7888309b | 222 | return scm_from_bool (SCM_SMOB_PREDICATE (scm_tc16_macro, obj)); |
99027e3c | 223 | } |
1bbd0b84 | 224 | #undef FUNC_NAME |
99027e3c MD |
225 | |
226 | ||
227 | SCM_SYMBOL (scm_sym_syntax, "syntax"); | |
3063e30a | 228 | #if SCM_ENABLE_DEPRECATED == 1 |
99027e3c | 229 | SCM_SYMBOL (scm_sym_macro, "macro"); |
3063e30a | 230 | #endif |
99027e3c | 231 | SCM_SYMBOL (scm_sym_mmacro, "macro!"); |
3b88ed2a | 232 | SCM_SYMBOL (scm_sym_bimacro, "builtin-macro!"); |
5a0132b3 | 233 | SCM_SYMBOL (scm_sym_syncase_macro, "syncase-macro"); |
99027e3c | 234 | |
a1ec6916 | 235 | SCM_DEFINE (scm_macro_type, "macro-type", 1, 0, 0, |
1bbd0b84 | 236 | (SCM m), |
5a0132b3 AW |
237 | "Return one of the symbols @code{syntax}, @code{macro},\n" |
238 | "@code{macro!}, or @code{syntax-case}, depending on whether\n" | |
239 | "@var{m} is a syntax transformer, a regular macro, a memoizing\n" | |
240 | "macro, or a syntax-case macro, respectively. If @var{m} is\n" | |
241 | "not a macro, @code{#f} is returned.") | |
1bbd0b84 | 242 | #define FUNC_NAME s_scm_macro_type |
99027e3c | 243 | { |
f5710d53 | 244 | if (!SCM_SMOB_PREDICATE (scm_tc16_macro, m)) |
99027e3c | 245 | return SCM_BOOL_F; |
726d810a | 246 | switch (SCM_MACRO_TYPE (m)) |
99027e3c MD |
247 | { |
248 | case 0: return scm_sym_syntax; | |
3063e30a | 249 | #if SCM_ENABLE_DEPRECATED == 1 |
99027e3c | 250 | case 1: return scm_sym_macro; |
3063e30a | 251 | #endif |
99027e3c | 252 | case 2: return scm_sym_mmacro; |
3b88ed2a | 253 | case 3: return scm_sym_bimacro; |
5a0132b3 | 254 | case 4: return scm_sym_syncase_macro; |
1bbd0b84 | 255 | default: scm_wrong_type_arg (FUNC_NAME, 1, m); |
99027e3c MD |
256 | } |
257 | } | |
1bbd0b84 | 258 | #undef FUNC_NAME |
99027e3c MD |
259 | |
260 | ||
a1ec6916 | 261 | SCM_DEFINE (scm_macro_name, "macro-name", 1, 0, 0, |
1bbd0b84 | 262 | (SCM m), |
88c927e9 | 263 | "Return the name of the macro @var{m}.") |
1bbd0b84 | 264 | #define FUNC_NAME s_scm_macro_name |
99027e3c | 265 | { |
34d19ef6 | 266 | SCM_VALIDATE_SMOB (1, m, macro); |
5a0132b3 AW |
267 | if (scm_is_true (scm_procedure_p (SCM_SMOB_OBJECT (m)))) |
268 | return scm_procedure_name (SCM_SMOB_OBJECT (m)); | |
269 | return SCM_BOOL_F; | |
99027e3c | 270 | } |
1bbd0b84 | 271 | #undef FUNC_NAME |
99027e3c MD |
272 | |
273 | ||
a1ec6916 | 274 | SCM_DEFINE (scm_macro_transformer, "macro-transformer", 1, 0, 0, |
1bbd0b84 | 275 | (SCM m), |
88c927e9 | 276 | "Return the transformer of the macro @var{m}.") |
1bbd0b84 | 277 | #define FUNC_NAME s_scm_macro_transformer |
99027e3c | 278 | { |
6c289afe AW |
279 | SCM data; |
280 | ||
34d19ef6 | 281 | SCM_VALIDATE_SMOB (1, m, macro); |
6c289afe AW |
282 | data = SCM_PACK (SCM_SMOB_DATA (m)); |
283 | ||
284 | if (SCM_CLOSUREP (data) || SCM_PROGRAM_P (data)) | |
285 | return data; | |
286 | else | |
287 | return SCM_BOOL_F; | |
99027e3c | 288 | } |
1bbd0b84 | 289 | #undef FUNC_NAME |
99027e3c | 290 | |
5a0132b3 AW |
291 | SCM_DEFINE (scm_syncase_macro_type, "syncase-macro-type", 1, 0, 0, |
292 | (SCM m), | |
293 | "Return the type of the macro @var{m}.") | |
294 | #define FUNC_NAME s_scm_syncase_macro_type | |
295 | { | |
296 | SCM_VALIDATE_SMOB (1, m, macro); | |
297 | ||
298 | if (SCM_MACRO_IS_EXTENDED (m)) | |
299 | return SCM_SMOB_OBJECT_2 (m); | |
300 | else | |
301 | return SCM_BOOL_F; | |
302 | } | |
303 | #undef FUNC_NAME | |
304 | ||
305 | SCM_DEFINE (scm_syncase_macro_binding, "syncase-macro-binding", 1, 0, 0, | |
306 | (SCM m), | |
307 | "Return the binding of the macro @var{m}.") | |
308 | #define FUNC_NAME s_scm_syncase_macro_binding | |
309 | { | |
310 | SCM_VALIDATE_SMOB (1, m, macro); | |
311 | ||
312 | if (SCM_MACRO_IS_EXTENDED (m)) | |
313 | return SCM_SMOB_OBJECT_3 (m); | |
314 | else | |
315 | return SCM_BOOL_F; | |
316 | } | |
317 | #undef FUNC_NAME | |
318 | ||
99027e3c | 319 | SCM |
1bbd0b84 | 320 | scm_make_synt (const char *name, SCM (*macroizer) (), SCM (*fcn)() ) |
99027e3c | 321 | { |
86d31dfe | 322 | SCM var = scm_c_define (name, SCM_UNDEFINED); |
9a441ddb | 323 | SCM transformer = scm_c_make_subr (name, scm_tc7_subr_2, fcn); |
86d31dfe MV |
324 | SCM_VARIABLE_SET (var, macroizer (transformer)); |
325 | return SCM_UNSPECIFIED; | |
99027e3c MD |
326 | } |
327 | ||
328 | void | |
329 | scm_init_macros () | |
330 | { | |
e841c3e0 | 331 | scm_tc16_macro = scm_make_smob_type ("macro", 0); |
726d810a | 332 | scm_set_smob_print (scm_tc16_macro, macro_print); |
a0599745 | 333 | #include "libguile/macros.x" |
99027e3c | 334 | } |
89e00824 ML |
335 | |
336 | /* | |
337 | Local Variables: | |
338 | c-file-style: "gnu" | |
339 | End: | |
340 | */ |