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Add f64 filter

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This commit is contained in:
Tomas 2018-11-05 14:07:19 +01:00 committed by Dirkjan Ochtman
parent 1b3c5a8696
commit 962c24eaed
1 changed files with 19 additions and 1 deletions
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20
askama_shared/src/filters/mod.rs
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@ -22,7 +22,7 @@ use escaping::{self, MarkupDisplay};
// Askama or should refer to a local `filters` module. It should contain all the
// filters shipped with Askama, even the optional ones (since optional inclusion
// in the const vector based on features seems impossible right now).
pub const BUILT_IN_FILTERS: [&str; 20] = [
pub const BUILT_IN_FILTERS: [&str; 21] = [
"abs",
"capitalize",
"center",
@ -30,6 +30,7 @@ pub const BUILT_IN_FILTERS: [&str; 20] = [
"escape",
"format",
"indent",
"into_f64",
"into_isize",
"join",
"linebreaks",
@ -161,6 +162,14 @@ pub fn indent(s: &fmt::Display, width: &usize) -> Result<String> {
Ok(indented)
}
/// Casts number to f64
pub fn into_f64<T>(number: T) -> Result<f64>
where
T: NumCast,
{
number.to_f64().ok_or(Fmt(fmt::Error))
}
/// Casts number to isize
pub fn into_isize<T>(number: T) -> Result<isize>
where
@ -312,6 +321,15 @@ mod tests {
);
}
#[test]
fn test_into_f64() {
assert_eq!(into_f64(1).unwrap(), 1.0 as f64);
assert_eq!(into_f64(1.9).unwrap(), 1.9 as f64);
assert_eq!(into_f64(-1.9).unwrap(), -1.9 as f64);
assert_eq!(into_f64(INFINITY as f32).unwrap(), INFINITY);
assert_eq!(into_f64(-INFINITY as f32).unwrap(), -INFINITY);
}
#[test]
fn test_into_isize() {
assert_eq!(into_isize(1).unwrap(), 1 as isize);