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
|
use std::cmp::Ordering;
use crate::library::prelude::*;
/// Convert a value to a integer.
pub fn int(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let Spanned { v, span } = args.expect("value")?;
Ok(Value::Int(match v {
Value::Bool(v) => v as i64,
Value::Int(v) => v,
Value::Float(v) => v as i64,
Value::Str(v) => match v.parse() {
Ok(v) => v,
Err(_) => bail!(span, "invalid integer"),
},
v => bail!(span, "cannot convert {} to integer", v.type_name()),
}))
}
/// Convert a value to a float.
pub fn float(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let Spanned { v, span } = args.expect("value")?;
Ok(Value::Float(match v {
Value::Int(v) => v as f64,
Value::Float(v) => v,
Value::Str(v) => match v.parse() {
Ok(v) => v,
Err(_) => bail!(span, "invalid float"),
},
v => bail!(span, "cannot convert {} to float", v.type_name()),
}))
}
/// The absolute value of a numeric value.
pub fn abs(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let Spanned { v, span } = args.expect("numeric value")?;
Ok(match v {
Value::Int(v) => Value::Int(v.abs()),
Value::Float(v) => Value::Float(v.abs()),
Value::Length(v) => Value::Length(v.abs()),
Value::Angle(v) => Value::Angle(v.abs()),
Value::Relative(v) => Value::Relative(v.abs()),
Value::Fractional(v) => Value::Fractional(v.abs()),
Value::Linear(_) => bail!(span, "cannot take absolute value of a linear"),
v => bail!(span, "expected numeric value, found {}", v.type_name()),
})
}
/// The minimum of a sequence of values.
pub fn min(_: &mut Context, args: &mut Args) -> TypResult<Value> {
minmax(args, Ordering::Less)
}
/// The maximum of a sequence of values.
pub fn max(_: &mut Context, args: &mut Args) -> TypResult<Value> {
minmax(args, Ordering::Greater)
}
/// Find the minimum or maximum of a sequence of values.
fn minmax(args: &mut Args, goal: Ordering) -> TypResult<Value> {
let mut extremum = args.expect::<Value>("value")?;
for Spanned { v, span } in args.all::<Spanned<Value>>()? {
match v.partial_cmp(&extremum) {
Some(ordering) => {
if ordering == goal {
extremum = v;
}
}
None => bail!(
span,
"cannot compare {} and {}",
extremum.type_name(),
v.type_name(),
),
}
}
Ok(extremum)
}
/// Whether an integer is even.
pub fn even(_: &mut Context, args: &mut Args) -> TypResult<Value> {
Ok(Value::Bool(args.expect::<i64>("integer")? % 2 == 0))
}
/// Whether an integer is odd.
pub fn odd(_: &mut Context, args: &mut Args) -> TypResult<Value> {
Ok(Value::Bool(args.expect::<i64>("integer")? % 2 != 0))
}
/// The modulo of two numbers.
pub fn mod_(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let Spanned { v: v1, span: span1 } = args.expect("integer or float")?;
let Spanned { v: v2, span: span2 } = args.expect("integer or float")?;
let (a, b) = match (v1, v2) {
(Value::Int(a), Value::Int(b)) => match a.checked_rem(b) {
Some(res) => return Ok(Value::Int(res)),
None => bail!(span2, "divisor must not be zero"),
},
(Value::Int(a), Value::Float(b)) => (a as f64, b),
(Value::Float(a), Value::Int(b)) => (a, b as f64),
(Value::Float(a), Value::Float(b)) => (a, b),
(Value::Int(_), b) | (Value::Float(_), b) => bail!(
span2,
format!("expected integer or float, found {}", b.type_name())
),
(a, _) => bail!(
span1,
format!("expected integer or float, found {}", a.type_name())
),
};
if b == 0.0 {
bail!(span2, "divisor must not be zero");
}
Ok(Value::Float(a % b))
}
/// Create a sequence of numbers.
pub fn range(_: &mut Context, args: &mut Args) -> TypResult<Value> {
let first = args.expect::<i64>("end")?;
let (start, end) = match args.eat::<i64>()? {
Some(second) => (first, second),
None => (0, first),
};
let step: i64 = match args.named("step")? {
Some(Spanned { v: 0, span }) => bail!(span, "step must not be zero"),
Some(Spanned { v, .. }) => v,
None => 1,
};
let mut x = start;
let mut seq = vec![];
while x.cmp(&end) == 0.cmp(&step) {
seq.push(Value::Int(x));
x += step;
}
Ok(Value::Array(Array::from_vec(seq)))
}
|
