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
use std::mem::swap;
use voile_util::loc::ToLoc;
use crate::syntax::abs::AbsDecl;
use crate::syntax::core::{Neutral, TraverseNeutral, Val, ValInfo, TYPE_OMEGA};
use super::monad::{ValTCM, TCE, TCM, TCS};
pub fn check_decls(tcs: TCS, decls: Vec<AbsDecl>) -> TCM {
decls.into_iter().try_fold(tcs, check_decl)
}
fn require_local_emptiness(tcs: &TCS) {
debug_assert!(tcs.local_env.is_empty());
debug_assert!(tcs.local_gamma.is_empty());
}
fn unimplemented_to_glob(v: &mut [ValInfo], i: usize) {
let mut placeholder = Default::default();
swap(&mut v[i], &mut placeholder);
placeholder = placeholder.map_ast(|ast| ast.unimplemented_to_glob());
swap(&mut placeholder, &mut v[i]);
}
pub fn inline_metas(mut tcs: TCS, val: ValInfo) -> ValTCM {
use Neutral::*;
let info = val.loc;
let val = val.ast.try_map_neutral(&mut |neut| match neut {
Meta(mi) => tcs
.meta_context
.take_meta(mi)
.ok_or_else(|| TCE::MetaUnsolved(mi)),
e => Ok(Val::Neut(e)),
})?;
Ok((val.into_info(info), tcs))
}
fn check_decl(tcs: TCS, decl: AbsDecl) -> TCM {
debug_assert_eq!(tcs.gamma.len(), tcs.env.len());
let tcs = match decl {
AbsDecl::Impl(impl_abs, sign_dbi) => {
let sign = tcs.glob_type(sign_dbi);
let sign_cloned = sign.ast.clone();
let (val_fake, tcs) = tcs.check(&impl_abs, &sign_cloned)?;
let val = val_fake.map_ast(|ast| ast.generated_to_var());
let (val, mut tcs) = inline_metas(tcs, val)?;
tcs.env[sign_dbi.0] = val;
for i in sign_dbi.0..tcs.glob_len() {
unimplemented_to_glob(&mut tcs.env, i);
}
for i in sign_dbi.0 + 1..tcs.glob_len() {
unimplemented_to_glob(&mut tcs.gamma, i);
}
tcs
}
AbsDecl::Sign(sign_abs, self_index) => {
let loc = sign_abs.loc();
let (sign_fake, tcs) = tcs.check(&sign_abs, &TYPE_OMEGA)?;
let (sign_fake, mut tcs) = inline_metas(tcs, sign_fake)?;
let sign = sign_fake.map_ast(|ast| ast.generated_to_var());
let val_info = Val::fresh_unimplemented(self_index).into_info(loc);
tcs.env.push(val_info);
tcs.gamma.push(sign);
tcs
}
AbsDecl::Decl(impl_abs) => {
let (inferred, tcs) = tcs.infer(&impl_abs)?;
let (inferred, tcs) = inline_metas(tcs, inferred)?;
let (compiled, tcs) = tcs.evaluate(impl_abs);
let (compiled, mut tcs) = inline_metas(tcs, compiled)?;
let compiled = compiled.map_ast(|ast| ast.generated_to_var());
let inferred = inferred.map_ast(|ast| ast.generated_to_var());
tcs.env.push(compiled);
tcs.gamma.push(inferred);
tcs
}
};
require_local_emptiness(&tcs);
Ok(tcs)
}
impl TCS {
#[inline]
pub fn check_decls(self, decls: Vec<AbsDecl>) -> TCM {
check_decls(self, decls)
}
}