forked from rakudo/rakudo
-
Notifications
You must be signed in to change notification settings - Fork 0
/
traits.pm
253 lines (230 loc) · 7.54 KB
/
traits.pm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
use Perl6::BOOTSTRAP;
# Stub these or we can't use any sigil other than $.
my role Positional { ... }
my role Associative { ... }
my role Callable { ... }
# This is needed for the export trait.
my class Pair { ... }
# for errors
my class X::Inheritance::Unsupported { ... }
my class X::Export::NameClash { ... }
my class X::Composition::NotComposable { ... }
my class X::Import::MissingSymbols { ... }
proto trait_mod:<is>(|$) { * }
multi trait_mod:<is>(Mu:U $child, Mu:U $parent) {
if $parent.HOW.archetypes.inheritable() {
$child.HOW.add_parent($child, $parent);
}
elsif $parent.HOW.archetypes.inheritalizable() {
$child.HOW.add_parent($child, $parent.HOW.inheritalize($parent))
}
else {
X::Inheritance::Unsupported.new(
:child-typename($child.HOW.name($child)),
:$parent,
).throw;
}
}
multi trait_mod:<is>(Mu:U $type, :$rw!) {
$type.HOW.set_rw($type);
}
multi trait_mod:<is>(Mu:U $type, :$nativesize!) {
$type.HOW.set_nativesize($type, $nativesize);
}
multi trait_mod:<is>(Attribute:D $attr, :$rw!) {
$attr.set_rw();
}
multi trait_mod:<is>(Attribute:D $attr, :$readonly!) {
$attr.set_readonly();
}
multi trait_mod:<is>(Attribute:D $attr, :$box_target!) {
$attr.set_box_target();
}
multi trait_mod:<is>(Routine:D $r, :$rw!) {
$r.set_rw();
}
multi trait_mod:<is>(Routine:D $r, :$default!) {
$r does role { method default() { True } }
}
multi trait_mod:<is>(Routine:D $r, :$DEPRECATED!) {
# we'll add logic here later
}
multi trait_mod:<is>(Routine:D $r, :$inlinable!) {
$r.set_inline_info($inlinable);
}
multi trait_mod:<is>(Parameter:D $param, :$readonly!) {
# This is the default.
}
multi trait_mod:<is>(Parameter:D $param, :$rw!) {
$param.set_rw();
}
multi trait_mod:<is>(Parameter:D $param, :$copy!) {
$param.set_copy();
}
multi trait_mod:<is>(Parameter:D $param, :$required!) {
$param.set_required();
}
multi trait_mod:<is>(Parameter:D $param, :$parcel!) {
$param.set_parcel();
}
# TODO: Make this much less cheaty. That'll probably need the
# full-blown serialization, though.
sub EXPORT_SYMBOL(\$exp_name, @tags, Mu \$sym) {
my @export_packages = $*EXPORT;
for pir::perl6ize_type__PP(@*PACKAGES) {
unless .WHO.exists('EXPORT') {
.WHO<EXPORT> := Metamodel::PackageHOW.new_type(:name('EXPORT'));
.WHO<EXPORT>.^compose;
}
@export_packages.push: .WHO<EXPORT>;
}
for @export_packages -> $p {
for @tags -> $tag {
my $install_in;
if $p.WHO.exists($tag) {
$install_in := $p.WHO.{$tag};
}
else {
$install_in := $*W.pkg_create_mo($/, (package { }).HOW, :name($tag));
$*W.pkg_compose($install_in);
$*W.install_package_symbol($p, $tag, $install_in);
}
if $install_in.WHO.exists($exp_name) {
unless ($install_in.WHO){$exp_name} =:= $sym {
X::Export::NameClash.new(symbol => $exp_name).throw;
}
}
$*W.install_package_symbol($install_in, $exp_name, $sym);
}
}
}
multi trait_mod:<is>(Routine:D \$r, :$export!) {
my $to_export := $r.multi ?? $r.dispatcher !! $r;
my $exp_name := '&' ~ $r.name;
my @tags = 'ALL', ($export ~~ Pair ?? $export.key() !!
$export ~~ Positional ?? @($export)>>.key !!
'DEFAULT');
EXPORT_SYMBOL($exp_name, @tags, $to_export);
}
multi trait_mod:<is>(Mu:U \$type, :$export!) {
my $exp_name := $type.HOW.name($type);
my @tags = 'ALL', ($export ~~ Pair ?? $export.key !!
$export ~~ Positional ?? @($export)>>.key !!
'DEFAULT');
EXPORT_SYMBOL($exp_name, @tags, $type);
}
multi trait_mod:<is>(Mu:D $docee, :$docs!) {
$docee does role {
has $!WHY;
method WHY { $!WHY }
method set_docs($d) { $!WHY = $d }
}
$docee.set_docs($docs);
$docs.set_docee($docee);
}
multi trait_mod:<is>(Mu:U $docee, :$docs!) {
$docee.HOW.set_docs($docs);
$docs.set_docee($docee);
}
proto trait_mod:<does>(|$) { * }
multi trait_mod:<does>(Mu:U $doee, Mu:U $role) {
if $role.HOW.archetypes.composable() {
$doee.HOW.add_role($doee, $role)
}
elsif $role.HOW.archetypes.composalizable() {
$doee.HOW.add_role($doee, $role.HOW.composalize($role))
}
else {
X::Composition::NotComposable.new(
target-name => $doee.HOW.name($doee),
composer => $role,
).throw;
}
}
proto trait_mod:<of>(|$) { * }
multi trait_mod:<of>(Mu:U $target, Mu:U $type) {
# XXX Ensure we can do this, die if not.
$target.HOW.set_of($target, $type);
}
multi trait_mod:<of>(Routine:D $target, Mu:U $type) {
$target.signature.set_returns($type)
}
multi trait_mod:<is>(Routine:D $r, :$hidden_from_backtrace!) {
$r.HOW.mixin($r, role {
method is_hidden_from_backtrace { True }
});
}
proto trait_mod:<returns>(|$) { * }
multi trait_mod:<returns>(Routine:D $target, Mu:U $type) {
$target.signature.set_returns($type)
}
proto trait_mod:<as>(|$) { * }
multi trait_mod:<as>(Parameter:D $param, $type) {
$param.set_coercion($type);
}
my class Pair { ... }
proto trait_mod:<handles>(|$) { * }
multi trait_mod:<handles>(Attribute:D $target, $thunk) {
$target does role {
has $.handles;
method set_handles($expr) {
$!handles := $expr;
}
method add_delegator_method($attr: $pkg, $meth_name, $call_name) {
my $meth := method (|$c) is rw {
$attr.get_value(self)."$call_name"(|$c)
};
$meth.set_name($meth_name);
$pkg.HOW.add_method($pkg, $meth_name, $meth);
}
method apply_handles($attr: Mu $pkg) {
sub applier($expr) {
if $expr.defined() {
if $expr ~~ Str {
self.add_delegator_method($pkg, $expr, $expr);
}
elsif $expr ~~ Pair {
self.add_delegator_method($pkg, $expr.key, $expr.value);
}
elsif $expr ~~ Positional {
for $expr.list {
applier($_);
}
}
else {
$pkg.HOW.add_fallback($pkg,
-> $obj, $name {
?($name ~~ $expr)
},
-> $obj, $name {
-> $self, |$c {
$attr.get_value($self)."$name"(|$c)
}
});
}
}
else {
$pkg.HOW.add_fallback($pkg,
-> $obj, $name {
?$expr.can($name)
},
-> $obj, $name {
-> $self, |$c {
$attr.get_value($self)."$name"(|$c)
}
});
}
}
applier($!handles);
}
};
$target.set_handles($thunk());
}
proto trait_mod:<will>(|$) { * }
multi trait_mod:<will>(Attribute $attr, Block :$build!) {
$attr.set_build($build)
}
proto trait_mod:<trusts>(|$) { * }
multi trait_mod:<trusts>(Mu:U $truster, Mu:U $trustee) {
$truster.HOW.add_trustee($truster, $trustee);
}