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
|
use rprt_engine::{
evaluate::evaluate,
expression::{BuiltinSelectionFn, ResultTransform, SearchModifier},
parser::parse,
selection::{Interval, Selection},
selection_functions::{SelectionFunctionError, evaluate_selection_function},
state::EditorState,
token::tokenise,
};
fn state_with_content(content: &str) -> EditorState {
let mut es = EditorState::new();
es.create_buffer("test".to_string(), content.to_string(), None);
es
}
/// Parse `input` and evaluate it against a fresh state holding `content`.
fn eval_str(content: &str, input: &str) -> Result<Selection, String> {
let mut es = state_with_content(content);
let tokens = tokenise(input).map_err(|e| format!("tokenise: {e:?}"))?;
let comp = parse(tokens).map_err(|e| format!("parse: {e:?}"))?;
evaluate(&mut es, comp).map_err(|e| format!("evaluate: {e:?}"))
}
fn assert_scalar(res: Selection, pos: usize) {
match res {
Selection::Scalar { buffer_id, pos: p } => {
assert_eq!(buffer_id, 0);
assert_eq!(p, pos, "expected scalar at {pos}");
}
other => panic!("expected scalar at {pos}, got {other:?}"),
}
}
#[test]
fn niladic_character() {
assert_scalar(eval_str("hello world", "#5").unwrap(), 5);
// clamped to buffer end
assert_scalar(eval_str("hello world", "#100").unwrap(), 11);
}
#[test]
fn niladic_end_unparameterised() {
// These go through UnparameterisedSelectionFunction + the
// SelectionFunction<()> blanket impl.
assert_scalar(eval_str("hello world", "$").unwrap(), 11);
assert_scalar(eval_str("hello world", "'$").unwrap(), 0);
assert!(eval_str("hello world", ";$").is_err());
assert!(eval_str("hello world", "';$").is_err());
assert!(eval_str("hello world", ";'$").is_err());
}
#[test]
fn monadic_over_scalar() {
// Train: f = #5 (niladic), g = $ applied to f's result (rank-0 vectorise).
assert_scalar(eval_str("hello world", "#5 $").unwrap(), 5);
// "α ;$" = "End of buffer"
assert_scalar(eval_str("hello world", "#5 ;$").unwrap(), 11);
assert_scalar(eval_str("hello world", "#5 '$").unwrap(), 5);
}
#[test]
fn character_within_interval() {
// "α #n" rank 1: "Char n within α", offset from the interval's start,
// clamped at its end.
let es = state_with_content("hello world");
let interval = || Selection::Vector {
buffer_id: 0,
interval: Interval::new(2, 9),
};
let res = evaluate_selection_function(
&es,
BuiltinSelectionFn::CharOffset(3),
None,
None,
Some(interval()),
None,
)
.unwrap();
assert_scalar(res, 5); // 2 + 3
// clamped at the interval's end
let res = evaluate_selection_function(
&es,
BuiltinSelectionFn::CharOffset(100),
None,
None,
Some(interval()),
None,
)
.unwrap();
assert_scalar(res, 9);
}
#[test]
fn search_modifiers_character() {
// ;#1: min(pos + 1, max)
assert_scalar(eval_str("hello world", "#2 ;#1").unwrap(), 3);
// ';#1: pos - 1
assert_scalar(eval_str("hello world", "#2 ';#1").unwrap(), 1);
}
#[test]
fn reverse_character() {
// '#3 niladic: "Character 3 from end of buffer"
assert_scalar(eval_str("hello world", "'#3").unwrap(), 8);
// "α '#n" rank 1: "Char n from end of α" --- offset back from the
// interval's end boundary, clamped at 0.
let es = state_with_content("hello world");
let interval = || Selection::Vector {
buffer_id: 0,
interval: Interval::new(2, 9),
};
let res = evaluate_selection_function(
&es,
BuiltinSelectionFn::CharOffset(3),
Some(SearchModifier::Reverse),
None,
Some(interval()),
None,
)
.unwrap();
assert_scalar(res, 6); // 9 - 3
// n larger than the interval's length clamps to 0.
let res = evaluate_selection_function(
&es,
BuiltinSelectionFn::CharOffset(10),
Some(SearchModifier::Reverse),
None,
Some(interval()),
None,
)
.unwrap();
assert_scalar(res, 0);
}
#[test]
fn monadic_over_vectors() {
// #100 applied to a rank-2 selection: min(interval.end, 100) per range.
let es = state_with_content("hello world");
let res = evaluate_selection_function(
&es,
BuiltinSelectionFn::CharOffset(100),
None,
None,
Some(Selection::Vectors {
buffer_id: 0,
ranges: vec![Interval::new(2, 4), Interval::new(6, 9)],
}),
None,
)
.unwrap();
match res {
Selection::Vectors { buffer_id, ranges } => {
assert_eq!(buffer_id, 0);
assert_eq!(ranges.len(), 2);
assert_eq!((ranges[0].start, ranges[0].end), (4, 5));
assert_eq!((ranges[1].start, ranges[1].end), (9, 10));
}
other => panic!("expected Vectors, got {other:?}"),
}
}
#[test]
fn complement_transform() {
// ~#5 on "hello world": complement of pos 5 is [0..5) and (6..11].
let es = state_with_content("hello world");
let res = evaluate_selection_function(
&es,
BuiltinSelectionFn::CharOffset(5),
None,
Some(ResultTransform::Complement),
None,
None,
)
.unwrap();
match res {
Selection::Vectors { buffer_id, ranges } => {
assert_eq!(buffer_id, 0);
assert_eq!(ranges.len(), 2);
assert_eq!((ranges[0].start, ranges[0].end), (0, 5));
assert_eq!((ranges[1].start, ranges[1].end), (6, 11));
}
other => panic!("expected Vectors, got {other:?}"),
}
}
#[test]
fn empty_selection() {
// `e` and `α e`: empty selection of rank 3.
match eval_str("hello world", "e").unwrap() {
Selection::MultiVectors { multi_ranges } => assert!(multi_ranges.is_empty()),
other => panic!("expected rank-3 empty, got {other:?}"),
}
match eval_str("hello world", "#5 e").unwrap() {
Selection::MultiVectors { multi_ranges } => assert!(multi_ranges.is_empty()),
other => panic!("expected rank-3 empty, got {other:?}"),
}
// `'e` and `;e`: empty selection of rank 2, anchored to the buffer.
match eval_str("hello world", "#5 'e").unwrap() {
Selection::Vectors { buffer_id, ranges } => {
assert_eq!(buffer_id, 0);
assert!(ranges.is_empty());
}
other => panic!("expected rank-2 empty, got {other:?}"),
}
match eval_str("hello world", "#5 ;e").unwrap() {
Selection::Vectors { buffer_id, ranges } => {
assert_eq!(buffer_id, 0);
assert!(ranges.is_empty());
}
other => panic!("expected rank-2 empty, got {other:?}"),
}
// `;e` and friends have no niladic form.
assert!(eval_str("hello world", ";e").is_err());
assert!(eval_str("hello world", ";'e").is_err());
assert!(eval_str("hello world", "';e").is_err());
}
#[test]
fn dyadic_is_rejected() {
let es = state_with_content("hello world");
let scalar = || Selection::Scalar {
buffer_id: 0,
pos: 0,
};
let res = evaluate_selection_function(
&es,
BuiltinSelectionFn::EndOfBuffer,
None,
None,
Some(scalar()),
Some(scalar()),
);
match res {
Err(SelectionFunctionError::NoDyadicForm(name)) => {
assert_eq!(name, "end");
}
other => panic!("expected NoDyadicForm, got {other:?}"),
}
}
|
