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
// Copyright © 2024-2026 The µcad authors <info@microcad.xyz>
// SPDX-License-Identifier: AGPL-3.0-or-later
//! µcad builtin array functions.
use microcad_builtin_proc_macros::builtin_mod;
/// Module for built-in array functions.
///
/// These functions are only supposed to work with [`Value::Array`].
#[builtin_mod]
#[allow(clippy::module_inception)]
pub mod array {
use microcad_builtin_proc_macros::builtin_fn;
use microcad_lang::{
eval::EvalError,
parameter,
value::{Value, ValueAccess},
};
use microcad_lang_base::PushDiag;
/// Return the number of elements in an array.
#[builtin_fn(x)]
pub fn len() -> Symbol {
|_params, args, ctx| {
let arg = args.get_single()?;
Ok(match &arg.1.value {
Value::Array(a) => Value::Integer(a.len() as i64),
_ => {
ctx.error(arg.1, EvalError::BuiltinError("Value has no count.".into()))?;
Value::None
}
})
}
}
/// Return the count of elements in an array or string.
///
/// Note: This symbol might be deprecated in the future.
#[builtin_fn(x)]
pub fn count() -> Symbol {
|_params, args, ctx| {
let arg = args.get_single()?;
Ok(match &arg.1.value {
Value::String(s) => Value::Integer(s.chars().count() as i64),
Value::Array(a) => Value::Integer(a.len() as i64),
_ => {
ctx.error(arg.1, EvalError::BuiltinError("Value has no count.".into()))?;
Value::None
}
})
}
}
/// Return the first element in an array or string.
#[builtin_fn(x)]
pub fn first() -> Symbol {
|_params, args, ctx| {
let arg = args.get_single()?;
Ok(match &arg.1.value {
Value::Array(a) if !a.is_empty() => a.first(),
Value::Array(_) => {
ctx.error(arg.1, EvalError::BuiltinError("Value is empty.".into()))?;
Value::None
}
_ => {
ctx.error(
arg.1,
EvalError::BuiltinError("Value is not an array.".into()),
)?;
Value::None
}
})
}
}
/// Return everything but the first element in an array or string.
#[builtin_fn(x)]
pub fn last() -> Symbol {
|_params, args, ctx| {
let arg = args.get_single()?;
Ok(match &arg.1.value {
Value::Array(a) if !a.is_empty() => a.last(),
Value::Array(_) => {
ctx.error(arg.1, EvalError::BuiltinError("Value is empty.".into()))?;
Value::None
}
_ => {
ctx.error(arg.1, EvalError::BuiltinError("Value has no tail.".into()))?;
Value::None
}
})
}
}
/// Return the first element in an array or string.
///
/// Note this function is supposed to be deprecated in the future.
#[builtin_fn(x)]
pub fn head() -> Symbol {
|_params, args, ctx| {
let arg = args.get_single()?;
Ok(match &arg.1.value {
Value::Array(a) if !a.is_empty() => a.first(),
Value::Array(_) => {
ctx.error(arg.1, EvalError::BuiltinError("Value is empty.".into()))?;
Value::None
}
_ => {
ctx.error(
arg.1,
EvalError::BuiltinError("Value is not an array.".into()),
)?;
Value::None
}
})
}
}
/// Return everything but the first element in an array or string.
#[builtin_fn(x)]
pub fn tail() -> Symbol {
|_params, args, ctx| {
let arg = args.get_single()?;
Ok(match &arg.1.value {
Value::Array(a) => a.tail().into(),
_ => {
ctx.error(arg.1, EvalError::BuiltinError("Value has no tail.".into()))?;
Value::None
}
})
}
}
/// Return reversed version of this array.
#[builtin_fn(x)]
pub fn rev() -> Symbol {
|_params, args, ctx| {
let arg = args.get_single()?;
Ok(match &arg.1.value {
Value::Array(a) => a.rev().into(),
_ => {
ctx.error(
arg.1,
EvalError::BuiltinError("Value is not an array.".into()),
)?;
Value::None
}
})
}
}
/// Return a sorted version of this array
#[builtin_fn(x)]
pub fn sorted() -> Symbol {
|_params, args, ctx| {
let arg = args.get_single()?;
Ok(match &arg.1.value {
Value::Array(a) => a.sorted().into(),
_ => {
ctx.error(
arg.1,
EvalError::BuiltinError("Value is not an array.".into()),
)?;
Value::None
}
})
}
}
/// Check if all items are sorted in ascending order.
#[builtin_fn(x)]
pub fn is_ascending() -> Symbol {
|_params, args, ctx| {
let arg = args.get_single()?;
Ok(match &arg.1.value {
Value::Array(a) => a.is_ascending().into(),
_ => {
ctx.error(
arg.1,
EvalError::BuiltinError("Value is not an array.".into()),
)?;
Value::None
}
})
}
}
/// Check if all items are sorted in descending order.
#[builtin_fn(x)]
pub fn is_descending() -> Symbol {
|_params, args, ctx| {
let arg = args.get_single()?;
Ok(match &arg.1.value {
Value::Array(a) => a.is_descending().into(),
_ => {
ctx.error(
arg.1,
EvalError::BuiltinError("Value is not an array.".into()),
)?;
Value::None
}
})
}
}
/// Check if an array contains an element.
#[builtin_fn(arr, x)]
pub fn contains() -> Symbol {
|_params, args, ctx| {
let arr = match args.get_value("arr") {
Err(_) => args
.get_by_index(0)
.map(|(_, arg)| arg.value.clone())
.unwrap_or_default(),
Ok(arr) => arr.clone(),
};
let x = match args.get_value("x") {
Err(_) => args
.get_by_index(1)
.map(|(_, arg)| arg.value.clone())
.unwrap_or_default(),
Ok(arr) => arr.clone(),
};
Ok(match arr {
Value::Array(a) => a.contains(&x).into(),
_ => {
ctx.error(
args,
EvalError::BuiltinError("Value is not an array.".into()),
)?;
Value::None
}
})
}
}
}