Function parse_corner_radii 

pub fn parse_corner_radii(
    ctx: &str,
    name: &str,
    value: &str,
) -> Result<[f32; 4], ParseError>

CSS border-radius multi-value shorthand -> per-corner radii [top-left, top-right, bottom-right, bottom-left]:

• 1 value a -> [a, a, a, a]
• 2 values a b -> [a, b, a, b]
• 3 values a b c -> [a, b, c, b]
• 4 values -> explicit per-corner.