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1
|
|
#define R_NO_REMAP
|
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2
|
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#include <Rinternals.h>
|
|
3
|
|
|
|
4
|
|
|
|
5
|
|
SEXP syms_delayed_assign = NULL;
|
|
6
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|
|
|
7
|
1
|
void r_env_bind_lazy(SEXP env,
|
|
8
|
|
SEXP sym,
|
|
9
|
|
SEXP expr,
|
|
10
|
|
SEXP eval_env) {
|
|
11
|
1
|
SEXP prom = PROTECT(Rf_allocSExp(PROMSXP));
|
|
12
|
1
|
SET_PRENV(prom, eval_env);
|
|
13
|
1
|
SET_PRCODE(prom, expr);
|
|
14
|
1
|
SET_PRVALUE(prom, R_UnboundValue);
|
|
15
|
|
|
|
16
|
1
|
Rf_defineVar(sym, prom, env);
|
|
17
|
|
|
|
18
|
1
|
UNPROTECT(1);
|
|
19
|
1
|
return;
|
|
20
|
|
|
|
21
|
|
SEXP call = PROTECT(Rf_lang5(syms_delayed_assign, sym, expr, eval_env, env));
|
|
22
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|
Rf_eval(call, R_BaseEnv);
|
|
23
|
|
UNPROTECT(1);
|
|
24
|
|
}
|
|
25
|
|
|
|
26
|
|
|
|
27
|
|
// For `R_removeVarFromFrame()` compatibility
|
|
28
|
|
SEXP syms_envir = NULL;
|
|
29
|
|
SEXP syms_inherits = NULL;
|
|
30
|
|
SEXP syms_list = NULL;
|
|
31
|
|
SEXP syms_rm = NULL;
|
|
32
|
|
|
|
33
|
|
#include <Rversion.h>
|
|
34
|
|
|
|
35
|
|
#if (R_VERSION < R_Version(4, 0, 0))
|
|
36
|
|
void r__env_unbind(SEXP env, SEXP sym) {
|
|
37
|
|
// Check if binding exists to avoid `rm()` warning
|
|
38
|
|
if (Rf_findVar(sym, env) != R_UnboundValue) {
|
|
39
|
|
SEXP nm = PROTECT(Rf_allocVector(STRSXP, 1));
|
|
40
|
|
SET_STRING_ELT(nm, 0, PRINTNAME(sym));
|
|
41
|
|
|
|
42
|
|
// remove(list = y, envir = x, inherits = z)
|
|
43
|
|
SEXP args = Rf_cons(Rf_ScalarLogical(0), R_NilValue);
|
|
44
|
|
SET_TAG(args, syms_inherits);
|
|
45
|
|
|
|
46
|
|
args = Rf_cons(env, args);
|
|
47
|
|
SET_TAG(args, syms_envir);
|
|
48
|
|
|
|
49
|
|
args = Rf_cons(nm, args);
|
|
50
|
|
SET_TAG(args, syms_list);
|
|
51
|
|
|
|
52
|
|
SEXP call = Rf_lcons(syms_rm, args);
|
|
53
|
|
PROTECT(call);
|
|
54
|
|
|
|
55
|
|
Rf_eval(call, R_BaseEnv);
|
|
56
|
|
UNPROTECT(2);
|
|
57
|
|
}
|
|
58
|
|
}
|
|
59
|
|
#endif
|
|
60
|
|
|
|
61
|
|
|
|
62
|
|
#include <R_ext/Parse.h>
|
|
63
|
|
|
|
64
|
0
|
static void abort_parse(SEXP code, const char* why) {
|
|
65
|
0
|
if (Rf_GetOption1(Rf_install("rlang__verbose_errors")) != R_NilValue) {
|
|
66
|
0
|
Rf_PrintValue(code);
|
|
67
|
|
}
|
|
68
|
0
|
Rf_error("Internal error in `r_parse()`: %s", why);
|
|
69
|
|
}
|
|
70
|
|
|
|
71
|
1
|
SEXP r_parse(const char* str) {
|
|
72
|
1
|
SEXP str_ = PROTECT(Rf_mkString(str));
|
|
73
|
|
|
|
74
|
|
ParseStatus status;
|
|
75
|
1
|
SEXP out = PROTECT(R_ParseVector(str_, -1, &status, R_NilValue));
|
|
76
|
1
|
if (status != PARSE_OK) {
|
|
77
|
0
|
abort_parse(str_, "Parsing failed.");
|
|
78
|
|
}
|
|
79
|
1
|
if (Rf_length(out) != 1) {
|
|
80
|
0
|
abort_parse(str_, "Expected a single expression.");
|
|
81
|
|
}
|
|
82
|
|
|
|
83
|
1
|
out = VECTOR_ELT(out, 0);
|
|
84
|
|
|
|
85
|
1
|
UNPROTECT(2);
|
|
86
|
1
|
return out;
|
|
87
|
|
}
|
|
88
|
1
|
SEXP r_parse_eval(const char* str, SEXP env) {
|
|
89
|
1
|
SEXP out = Rf_eval(PROTECT(r_parse(str)), env);
|
|
90
|
1
|
UNPROTECT(1);
|
|
91
|
1
|
return out;
|
|
92
|
|
}
|
|
93
|
|
|
|
94
|
|
static SEXP new_env_call = NULL;
|
|
95
|
|
static SEXP new_env__parent_node = NULL;
|
|
96
|
|
static SEXP new_env__size_node = NULL;
|
|
97
|
|
|
|
98
|
|
#if 0
|
|
99
|
|
SEXP r_new_environment(SEXP parent, R_len_t size) {
|
|
100
|
|
parent = parent ? parent : R_EmptyEnv;
|
|
101
|
|
SETCAR(new_env__parent_node, parent);
|
|
102
|
|
|
|
103
|
|
size = size ? size : 29;
|
|
104
|
|
SETCAR(new_env__size_node, Rf_ScalarInteger(size));
|
|
105
|
|
|
|
106
|
|
SEXP env = Rf_eval(new_env_call, R_BaseEnv);
|
|
107
|
|
|
|
108
|
|
// Free for gc
|
|
109
|
|
SETCAR(new_env__parent_node, R_NilValue);
|
|
110
|
|
|
|
111
|
|
return env;
|
|
112
|
|
}
|
|
113
|
|
#endif
|
|
114
|
|
|
|
115
|
|
|
|
116
|
1
|
void magrittr_init_utils(SEXP ns) {
|
|
117
|
1
|
syms_delayed_assign = Rf_install("delayedAssign");
|
|
118
|
1
|
syms_envir = Rf_install("envir");
|
|
119
|
1
|
syms_inherits = Rf_install("inherits");
|
|
120
|
1
|
syms_list = Rf_install("list");
|
|
121
|
1
|
syms_rm = Rf_install("rm");
|
|
122
|
|
|
|
123
|
1
|
new_env_call = r_parse_eval("as.call(list(new.env, TRUE, NULL, NULL))", R_BaseEnv);
|
|
124
|
1
|
R_PreserveObject(new_env_call);
|
|
125
|
1
|
new_env__parent_node = CDDR(new_env_call);
|
|
126
|
1
|
new_env__size_node = CDR(new_env__parent_node);
|
|
127
|
|
}
|
lionel-