Commit | Line | Data |
---|---|---|
5ec1d2c8 | 1 | /* Copyright (C) 1998,1999,2000,2001,2002 Free Software Foundation, Inc. |
40cf7e92 MD |
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 | 41 | |
1bbd0b84 | 42 | |
40cf7e92 MD |
43 | \f |
44 | ||
a0599745 MD |
45 | #include "libguile/_scm.h" |
46 | #include "libguile/eval.h" | |
47 | #include "libguile/macros.h" | |
48 | #include "libguile/modules.h" | |
7e73eaee | 49 | #include "libguile/fluids.h" |
40cf7e92 | 50 | |
a0599745 MD |
51 | #include "libguile/validate.h" |
52 | #include "libguile/evalext.h" | |
40cf7e92 | 53 | |
a70fb265 MD |
54 | SCM_SYMBOL (scm_sym_setter, "setter"); |
55 | ||
56 | SCM | |
e81d98ec | 57 | scm_m_generalized_set_x (SCM xorig, SCM env SCM_UNUSED) |
a70fb265 MD |
58 | { |
59 | SCM x = SCM_CDR (xorig); | |
160bb34a | 60 | SCM_ASSYNT (2 == scm_ilength (x), scm_s_expression, scm_s_set_x); |
0c95b57d | 61 | if (SCM_SYMBOLP (SCM_CAR (x))) |
a70fb265 | 62 | return scm_cons (SCM_IM_SET_X, x); |
0c95b57d | 63 | else if (SCM_CONSP (SCM_CAR (x))) |
1afff620 KN |
64 | return scm_cons (scm_list_2 (scm_sym_setter, SCM_CAAR (x)), |
65 | scm_append (scm_list_2 (SCM_CDAR (x), SCM_CDR (x)))); | |
db4b4ca6 DH |
66 | else |
67 | scm_misc_error (scm_s_set_x, scm_s_variable, SCM_EOL); | |
a70fb265 MD |
68 | } |
69 | ||
5ec1d2c8 | 70 | SCM_DEFINE (scm_defined_p, "defined?", 1, 1, 0, |
1bbd0b84 | 71 | (SCM sym, SCM env), |
67dc6a4e | 72 | "Return @code{#t} if @var{sym} is defined in the lexical " |
826e91f3 MV |
73 | "environment @var{env}. When @var{env} is not specified, " |
74 | "look in the top-level environment as defined by the " | |
67dc6a4e | 75 | "current module.") |
5ec1d2c8 | 76 | #define FUNC_NAME s_scm_defined_p |
40cf7e92 | 77 | { |
86d31dfe | 78 | SCM var; |
40cf7e92 | 79 | |
34d19ef6 | 80 | SCM_VALIDATE_SYMBOL (1, sym); |
40cf7e92 | 81 | |
b325a6c8 | 82 | if (SCM_UNBNDP (env)) |
86d31dfe MV |
83 | var = scm_sym2var (sym, scm_current_module_lookup_closure (), |
84 | SCM_BOOL_F); | |
b325a6c8 MD |
85 | else |
86 | { | |
87 | SCM frames = env; | |
88 | register SCM b; | |
89 | for (; SCM_NIMP (frames); frames = SCM_CDR (frames)) | |
90 | { | |
1bbd0b84 | 91 | SCM_ASSERT (SCM_CONSP (frames), env, SCM_ARG2, FUNC_NAME); |
b325a6c8 MD |
92 | b = SCM_CAR (frames); |
93 | if (SCM_NFALSEP (scm_procedure_p (b))) | |
94 | break; | |
c1bfcf60 | 95 | SCM_ASSERT (SCM_CONSP (b), env, SCM_ARG2, FUNC_NAME); |
b325a6c8 MD |
96 | for (b = SCM_CAR (b); SCM_NIMP (b); b = SCM_CDR (b)) |
97 | { | |
98 | if (SCM_NCONSP (b)) | |
99 | { | |
54778cd3 | 100 | if (SCM_EQ_P (b, sym)) |
b325a6c8 MD |
101 | return SCM_BOOL_T; |
102 | else | |
103 | break; | |
104 | } | |
54778cd3 | 105 | if (SCM_EQ_P (SCM_CAR (b), sym)) |
b325a6c8 MD |
106 | return SCM_BOOL_T; |
107 | } | |
108 | } | |
86d31dfe MV |
109 | var = scm_sym2var (sym, |
110 | SCM_NIMP (frames) ? SCM_CAR (frames) : SCM_BOOL_F, | |
111 | SCM_BOOL_F); | |
b325a6c8 MD |
112 | } |
113 | ||
86d31dfe | 114 | return (SCM_FALSEP (var) || SCM_UNBNDP (SCM_VARIABLE_REF (var)) |
b325a6c8 MD |
115 | ? SCM_BOOL_F |
116 | : SCM_BOOL_T); | |
40cf7e92 | 117 | } |
1bbd0b84 | 118 | #undef FUNC_NAME |
40cf7e92 | 119 | |
b8229a3b MS |
120 | |
121 | SCM_SYNTAX (s_undefine, "undefine", scm_makacro, scm_m_undefine); | |
40cf7e92 MD |
122 | |
123 | SCM | |
6e8d25a6 | 124 | scm_m_undefine (SCM x, SCM env) |
40cf7e92 MD |
125 | { |
126 | SCM arg1 = x; | |
127 | x = SCM_CDR (x); | |
160bb34a | 128 | SCM_ASSYNT (SCM_TOP_LEVEL (env), "bad placement ", s_undefine); |
54778cd3 | 129 | SCM_ASSYNT (SCM_CONSP (x) && SCM_NULLP (SCM_CDR (x)), |
160bb34a | 130 | scm_s_expression, s_undefine); |
40cf7e92 | 131 | x = SCM_CAR (x); |
160bb34a | 132 | SCM_ASSYNT (SCM_SYMBOLP (x), scm_s_variable, s_undefine); |
86d31dfe MV |
133 | arg1 = scm_sym2var (x, scm_env_top_level (env), SCM_BOOL_F); |
134 | SCM_ASSYNT (SCM_NFALSEP (arg1) && !SCM_UNBNDP (SCM_VARIABLE_REF (arg1)), | |
160bb34a | 135 | "variable already unbound ", s_undefine); |
86d31dfe | 136 | SCM_VARIABLE_SET (arg1, SCM_UNDEFINED); |
40cf7e92 | 137 | #ifdef SICP |
86d31dfe | 138 | return x; |
40cf7e92 MD |
139 | #else |
140 | return SCM_UNSPECIFIED; | |
141 | #endif | |
142 | } | |
143 | ||
1bbd0b84 | 144 | SCM_REGISTER_PROC (s_map_in_order, "map-in-order", 2, 0, 1, scm_map); |
285302e1 | 145 | |
40cf7e92 MD |
146 | void |
147 | scm_init_evalext () | |
148 | { | |
a70fb265 | 149 | scm_make_synt (scm_s_set_x, scm_makmmacro, scm_m_generalized_set_x); |
a0599745 | 150 | #include "libguile/evalext.x" |
40cf7e92 | 151 | } |
89e00824 ML |
152 | |
153 | /* | |
154 | Local Variables: | |
155 | c-file-style: "gnu" | |
156 | End: | |
157 | */ |