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
use artichoke_core::coerce_to_numeric::CoerceToNumeric;
use artichoke_core::convert::TryConvert;
use artichoke_core::debug::Debug;
use artichoke_core::eval::Eval;
use artichoke_core::value::Value as _;
use spinoso_exception::TypeError;
use crate::types::Ruby;
use crate::value::Value;
use crate::{Artichoke, Error};
impl CoerceToNumeric for Artichoke {
type Value = Value;
type Float = f64;
type Error = Error;
#[allow(clippy::cast_precision_loss)]
fn coerce_to_float(&mut self, value: Self::Value) -> Result<Self::Float, Self::Error> {
match value.ruby_type() {
Ruby::Float => return value.try_convert_into(self),
Ruby::Fixnum => return value.try_convert_into::<i64>(self).map(|int| int as f64),
Ruby::Nil => return Err(TypeError::with_message("can't convert nil into Float").into()),
_ => {}
}
let class_of_numeric = self.eval(b"Numeric")?;
let is_a_numeric = value.funcall(self, "is_a?", &[class_of_numeric], None)?;
let is_a_numeric = self.try_convert(is_a_numeric);
if let Ok(true) = is_a_numeric {
if !value.respond_to(self, "to_f")? {
let mut message = String::from("can't convert ");
message.push_str(self.inspect_type_name_for_value(value));
message.push_str(" into Float");
return Err(TypeError::from(message).into());
}
let coerced = value.funcall(self, "to_f", &[], None)?;
if let Ruby::Float = coerced.ruby_type() {
coerced.try_convert_into::<f64>(self)
} else {
let mut message = String::from("can't convert ");
let name = self.inspect_type_name_for_value(value);
message.push_str(name);
message.push_str(" into Float (");
message.push_str(name);
message.push_str("#to_f gives ");
message.push_str(self.inspect_type_name_for_value(coerced));
message.push(')');
Err(TypeError::from(message).into())
}
} else {
let mut message = String::from("can't convert ");
message.push_str(self.inspect_type_name_for_value(value));
message.push_str(" into Float");
Err(TypeError::from(message).into())
}
}
}
