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2b829bbb | 1 | /* Copyright (C) 1995,1996,1997,1998,2000,2001,2002,2003, 2006 Free Software Foundation, Inc. |
99027e3c | 2 | * |
73be1d9e MV |
3 | * This library is free software; you can redistribute it and/or |
4 | * modify it under the terms of the GNU Lesser General Public | |
5 | * License as published by the Free Software Foundation; either | |
6 | * version 2.1 of the License, or (at your option) any later version. | |
99027e3c | 7 | * |
73be1d9e MV |
8 | * This library 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 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 | |
92205699 | 15 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
73be1d9e | 16 | */ |
1bbd0b84 | 17 | |
1bbd0b84 | 18 | |
99027e3c MD |
19 | \f |
20 | ||
a0599745 | 21 | #include "libguile/_scm.h" |
726d810a DH |
22 | #include "libguile/alist.h" /* for SCM_EXTEND_ENV (well...) */ |
23 | #include "libguile/eval.h" | |
24 | #include "libguile/ports.h" | |
25 | #include "libguile/print.h" | |
a0599745 MD |
26 | #include "libguile/root.h" |
27 | #include "libguile/smob.h" | |
1d1559ce | 28 | #include "libguile/deprecation.h" |
99027e3c | 29 | |
a0599745 | 30 | #include "libguile/validate.h" |
3633ff4e | 31 | #include "libguile/programs.h" |
a0599745 | 32 | #include "libguile/macros.h" |
99027e3c | 33 | |
22fc179a HWN |
34 | #include "libguile/private-options.h" |
35 | ||
92c2555f | 36 | scm_t_bits scm_tc16_macro; |
99027e3c | 37 | |
726d810a DH |
38 | |
39 | static int | |
40 | macro_print (SCM macro, SCM port, scm_print_state *pstate) | |
41 | { | |
42 | SCM code = SCM_MACRO_CODE (macro); | |
43 | if (!SCM_CLOSUREP (code) | |
7888309b MV |
44 | || scm_is_false (scm_procedure_p (SCM_PRINT_CLOSURE)) |
45 | || scm_is_false (scm_printer_apply (SCM_PRINT_CLOSURE, | |
726d810a DH |
46 | macro, port, pstate))) |
47 | { | |
3633ff4e | 48 | if (!SCM_CLOSUREP (code) && !SCM_PROGRAM_P (code)) |
726d810a DH |
49 | scm_puts ("#<primitive-", port); |
50 | else | |
51 | scm_puts ("#<", port); | |
52 | ||
53 | if (SCM_MACRO_TYPE (macro) == 0) | |
54 | scm_puts ("syntax", port); | |
3063e30a DH |
55 | #if SCM_ENABLE_DEPRECATED == 1 |
56 | if (SCM_MACRO_TYPE (macro) == 1) | |
726d810a | 57 | scm_puts ("macro", port); |
3063e30a | 58 | #endif |
726d810a DH |
59 | if (SCM_MACRO_TYPE (macro) == 2) |
60 | scm_puts ("macro!", port); | |
3b88ed2a DH |
61 | if (SCM_MACRO_TYPE (macro) == 3) |
62 | scm_puts ("builtin-macro!", port); | |
63 | ||
726d810a DH |
64 | scm_putc (' ', port); |
65 | scm_iprin1 (scm_macro_name (macro), port, pstate); | |
66 | ||
67 | if (SCM_CLOSUREP (code) && SCM_PRINT_SOURCE_P) | |
68 | { | |
69 | SCM formals = SCM_CLOSURE_FORMALS (code); | |
70 | SCM env = SCM_ENV (code); | |
71 | SCM xenv = SCM_EXTEND_ENV (formals, SCM_EOL, env); | |
9fcf3cbb | 72 | SCM src = scm_i_unmemocopy_body (SCM_CODE (code), xenv); |
726d810a DH |
73 | scm_putc (' ', port); |
74 | scm_iprin1 (src, port, pstate); | |
75 | } | |
76 | ||
77 | scm_putc ('>', port); | |
78 | } | |
79 | ||
80 | return 1; | |
81 | } | |
82 | ||
f5710d53 MV |
83 | static SCM |
84 | makmac (SCM code, scm_t_bits flags) | |
85 | { | |
86 | SCM z; | |
87 | SCM_NEWSMOB (z, scm_tc16_macro, SCM_UNPACK (code)); | |
88 | SCM_SET_SMOB_FLAGS (z, flags); | |
89 | return z; | |
90 | } | |
726d810a | 91 | |
3b88ed2a DH |
92 | /* Return a mmacro that is known to be one of guile's built in macros. */ |
93 | SCM | |
94 | scm_i_makbimacro (SCM code) | |
95 | #define FUNC_NAME "scm_i_makbimacro" | |
96 | { | |
97 | SCM_VALIDATE_PROC (1, code); | |
f5710d53 | 98 | return makmac (code, 3); |
3b88ed2a DH |
99 | } |
100 | #undef FUNC_NAME | |
101 | ||
102 | ||
103 | SCM_DEFINE (scm_makmmacro, "procedure->memoizing-macro", 1, 0, 0, | |
104 | (SCM code), | |
105 | "Return a @dfn{macro} which, when a symbol defined to this value\n" | |
106 | "appears as the first symbol in an expression, evaluates the\n" | |
107 | "result of applying @var{code} to the expression and the\n" | |
108 | "environment.\n\n" | |
109 | "@code{procedure->memoizing-macro} is the same as\n" | |
110 | "@code{procedure->macro}, except that the expression returned by\n" | |
111 | "@var{code} replaces the original macro expression in the memoized\n" | |
112 | "form of the containing code.") | |
113 | #define FUNC_NAME s_scm_makmmacro | |
114 | { | |
115 | SCM_VALIDATE_PROC (1, code); | |
f5710d53 | 116 | return makmac (code, 2); |
3b88ed2a DH |
117 | } |
118 | #undef FUNC_NAME | |
119 | ||
120 | ||
a1ec6916 | 121 | SCM_DEFINE (scm_makacro, "procedure->syntax", 1, 0, 0, |
1bbd0b84 | 122 | (SCM code), |
1e6808ea MG |
123 | "Return a @dfn{macro} which, when a symbol defined to this value\n" |
124 | "appears as the first symbol in an expression, returns the\n" | |
125 | "result of applying @var{code} to the expression and the\n" | |
126 | "environment.") | |
1bbd0b84 | 127 | #define FUNC_NAME s_scm_makacro |
99027e3c | 128 | { |
34d19ef6 | 129 | SCM_VALIDATE_PROC (1, code); |
f5710d53 | 130 | return makmac (code, 0); |
99027e3c | 131 | } |
1bbd0b84 | 132 | #undef FUNC_NAME |
99027e3c MD |
133 | |
134 | ||
3063e30a DH |
135 | #if SCM_ENABLE_DEPRECATED == 1 |
136 | ||
3b3b36dd | 137 | SCM_DEFINE (scm_makmacro, "procedure->macro", 1, 0, 0, |
1bbd0b84 | 138 | (SCM code), |
1e6808ea MG |
139 | "Return a @dfn{macro} which, when a symbol defined to this value\n" |
140 | "appears as the first symbol in an expression, evaluates the\n" | |
141 | "result of applying @var{code} to the expression and the\n" | |
bb2c02f2 | 142 | "environment. For example:\n" |
1e6808ea MG |
143 | "\n" |
144 | "@lisp\n" | |
872e0c72 NJ |
145 | "(define trace\n" |
146 | " (procedure->macro\n" | |
147 | " (lambda (x env) `(set! ,(cadr x) (tracef ,(cadr x) ',(cadr x))))))\n\n" | |
148 | "(trace @i{foo}) @equiv{} (set! @i{foo} (tracef @i{foo} '@i{foo})).\n" | |
1e6808ea | 149 | "@end lisp") |
1bbd0b84 | 150 | #define FUNC_NAME s_scm_makmacro |
99027e3c | 151 | { |
3063e30a DH |
152 | scm_c_issue_deprecation_warning |
153 | ("The function procedure->macro is deprecated, and so are" | |
154 | " non-memoizing macros in general. Use memoizing macros" | |
155 | " or r5rs macros instead."); | |
156 | ||
34d19ef6 | 157 | SCM_VALIDATE_PROC (1, code); |
f5710d53 | 158 | return makmac (code, 1); |
99027e3c | 159 | } |
1bbd0b84 | 160 | #undef FUNC_NAME |
99027e3c | 161 | |
3063e30a DH |
162 | #endif |
163 | ||
99027e3c | 164 | |
a1ec6916 | 165 | SCM_DEFINE (scm_macro_p, "macro?", 1, 0, 0, |
1bbd0b84 | 166 | (SCM obj), |
b380b885 MD |
167 | "Return @code{#t} if @var{obj} is a regular macro, a memoizing macro or a\n" |
168 | "syntax transformer.") | |
1bbd0b84 | 169 | #define FUNC_NAME s_scm_macro_p |
99027e3c | 170 | { |
7888309b | 171 | return scm_from_bool (SCM_SMOB_PREDICATE (scm_tc16_macro, obj)); |
99027e3c | 172 | } |
1bbd0b84 | 173 | #undef FUNC_NAME |
99027e3c MD |
174 | |
175 | ||
176 | SCM_SYMBOL (scm_sym_syntax, "syntax"); | |
3063e30a | 177 | #if SCM_ENABLE_DEPRECATED == 1 |
99027e3c | 178 | SCM_SYMBOL (scm_sym_macro, "macro"); |
3063e30a | 179 | #endif |
99027e3c | 180 | SCM_SYMBOL (scm_sym_mmacro, "macro!"); |
3b88ed2a | 181 | SCM_SYMBOL (scm_sym_bimacro, "builtin-macro!"); |
99027e3c | 182 | |
a1ec6916 | 183 | SCM_DEFINE (scm_macro_type, "macro-type", 1, 0, 0, |
1bbd0b84 | 184 | (SCM m), |
1e6808ea MG |
185 | "Return one of the symbols @code{syntax}, @code{macro} or\n" |
186 | "@code{macro!}, depending on whether @var{m} is a syntax\n" | |
8f85c0c6 | 187 | "transformer, a regular macro, or a memoizing macro,\n" |
1e6808ea MG |
188 | "respectively. If @var{m} is not a macro, @code{#f} is\n" |
189 | "returned.") | |
1bbd0b84 | 190 | #define FUNC_NAME s_scm_macro_type |
99027e3c | 191 | { |
f5710d53 | 192 | if (!SCM_SMOB_PREDICATE (scm_tc16_macro, m)) |
99027e3c | 193 | return SCM_BOOL_F; |
726d810a | 194 | switch (SCM_MACRO_TYPE (m)) |
99027e3c MD |
195 | { |
196 | case 0: return scm_sym_syntax; | |
3063e30a | 197 | #if SCM_ENABLE_DEPRECATED == 1 |
99027e3c | 198 | case 1: return scm_sym_macro; |
3063e30a | 199 | #endif |
99027e3c | 200 | case 2: return scm_sym_mmacro; |
3b88ed2a | 201 | case 3: return scm_sym_bimacro; |
1bbd0b84 | 202 | default: scm_wrong_type_arg (FUNC_NAME, 1, m); |
99027e3c MD |
203 | } |
204 | } | |
1bbd0b84 | 205 | #undef FUNC_NAME |
99027e3c MD |
206 | |
207 | ||
a1ec6916 | 208 | SCM_DEFINE (scm_macro_name, "macro-name", 1, 0, 0, |
1bbd0b84 | 209 | (SCM m), |
88c927e9 | 210 | "Return the name of the macro @var{m}.") |
1bbd0b84 | 211 | #define FUNC_NAME s_scm_macro_name |
99027e3c | 212 | { |
34d19ef6 | 213 | SCM_VALIDATE_SMOB (1, m, macro); |
88c927e9 | 214 | return scm_procedure_name (SCM_PACK (SCM_SMOB_DATA (m))); |
99027e3c | 215 | } |
1bbd0b84 | 216 | #undef FUNC_NAME |
99027e3c MD |
217 | |
218 | ||
a1ec6916 | 219 | SCM_DEFINE (scm_macro_transformer, "macro-transformer", 1, 0, 0, |
1bbd0b84 | 220 | (SCM m), |
88c927e9 | 221 | "Return the transformer of the macro @var{m}.") |
1bbd0b84 | 222 | #define FUNC_NAME s_scm_macro_transformer |
99027e3c | 223 | { |
34d19ef6 | 224 | SCM_VALIDATE_SMOB (1, m, macro); |
88c927e9 MV |
225 | return ((SCM_CLOSUREP (SCM_PACK (SCM_SMOB_DATA (m)))) ? |
226 | SCM_PACK(SCM_SMOB_DATA (m)) : SCM_BOOL_F); | |
99027e3c | 227 | } |
1bbd0b84 | 228 | #undef FUNC_NAME |
99027e3c MD |
229 | |
230 | SCM | |
1bbd0b84 | 231 | scm_make_synt (const char *name, SCM (*macroizer) (), SCM (*fcn)() ) |
99027e3c | 232 | { |
86d31dfe | 233 | SCM var = scm_c_define (name, SCM_UNDEFINED); |
9a441ddb | 234 | SCM transformer = scm_c_make_subr (name, scm_tc7_subr_2, fcn); |
86d31dfe MV |
235 | SCM_VARIABLE_SET (var, macroizer (transformer)); |
236 | return SCM_UNSPECIFIED; | |
99027e3c MD |
237 | } |
238 | ||
239 | void | |
240 | scm_init_macros () | |
241 | { | |
e841c3e0 KN |
242 | scm_tc16_macro = scm_make_smob_type ("macro", 0); |
243 | scm_set_smob_mark (scm_tc16_macro, scm_markcdr); | |
726d810a | 244 | scm_set_smob_print (scm_tc16_macro, macro_print); |
a0599745 | 245 | #include "libguile/macros.x" |
99027e3c | 246 | } |
89e00824 ML |
247 | |
248 | /* | |
249 | Local Variables: | |
250 | c-file-style: "gnu" | |
251 | End: | |
252 | */ |