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Showing content from http://arrayfire.github.io/arrayfire-rust/arrayfire/../arrayfire/../src/arrayfire/core/dim4.rs.html below:

dim4.rs - source

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use std::fmt;
use std::ops::{Index, IndexMut};

#[cfg(feature = "afserde")]
use serde::{Deserialize, Serialize};


#[derive(Copy, Clone, PartialEq, Debug)]
#[cfg_attr(feature = "afserde", derive(Serialize, Deserialize))]
pub struct Dim4 {
    dims: [u64; 4],
}


impl Default for Dim4 {
    fn default() -> Self {
        Self { dims: [1, 1, 1, 1] }
    }
}














impl Index<usize> for Dim4 {
    type Output = u64;

    fn index(&self, _index: usize) -> &u64 {
        &self.dims[_index]
    }
}












impl IndexMut<usize> for Dim4 {
    fn index_mut(&mut self, _index: usize) -> &mut Self::Output {
        &mut self.dims[_index]
    }
}











impl fmt::Display for Dim4 {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(
            f,
            "[{} {} {} {}]",
            self.dims[0], self.dims[1], self.dims[2], self.dims[3]
        )
    }
}

impl Dim4 {
    
    
    
    
    
    
    
    
    pub fn new(dims: &[u64; 4]) -> Self {
        Self {
            dims: [dims[0], dims[1], dims[2], dims[3]],
        }
    }

    
    pub fn elements(&self) -> u64 {
        self.dims[0] * self.dims[1] * self.dims[2] * self.dims[3]
    }

    
    pub fn ndims(&self) -> usize {
        let nelems = self.elements();
        match nelems {
            0 => 0,
            1 => 1,
            _ => {
                if self.dims[3] != 1 {
                    4
                } else if self.dims[2] != 1 {
                    3
                } else if self.dims[1] != 1 {
                    2
                } else {
                    1
                }
            }
        }
    }

    
    pub fn get(&self) -> &[u64; 4] {
        &self.dims
    }
}

#[cfg(test)]
mod tests {
    #[cfg(feature = "afserde")]
    mod serde_tests {
        use super::super::Dim4;
        use crate::dim4;

        #[test]
        fn dim4_serde() {
            let dims = dim4!(4, 4);
            let serd = match serde_json::to_string(&dims) {
                Ok(serialized_str) => serialized_str,
                Err(e) => e.to_string(),
            };
            assert_eq!(serd, "{\"dims\":[4,4,1,1]}");

            let deserd: Dim4 = serde_json::from_str(&serd).unwrap();
            assert_eq!(deserd, dims);
        }
    }
}

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