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use std::fmt;
use std::ops::{Neg};
use traits::{MatrixShape, MatrixRawGet, SameShape};
use row_accessor::RowAccessor;
use column_accessor::ColumnAccessor;
use transpose::Transposer;
use view::View;
use slice::Slice;
use reshape::Reshape;
use hstack::HStack;
use vstack::VStack;
use matrix_mul::MatrixMul;
use matrix::{Matrix, write_mat};
use bin_ops::{MatrixBinOp, BinOp};
pub trait UnOp
{
fn op(&self, a: f64) -> f64;
}
#[derive(Copy, Clone)]
pub struct OpNeg;
impl OpNeg
{
#[inline]
pub fn new() -> OpNeg
{
OpNeg
}
}
impl UnOp for OpNeg
{
#[inline]
fn op(&self, a: f64) -> f64
{
-a
}
}
#[derive(Copy)]
pub struct MatrixUnOp<TA, TO>
{
a: TA,
o: TO
}
impl<TA,
TO: UnOp>
MatrixUnOp<TA, TO>
{
pub fn new(a: TA, o: TO) -> MatrixUnOp<TA, TO>
{
MatrixUnOp{ a: a, o: o }
}
}
impl<TA: Clone,
TO: Clone>
Clone for
MatrixUnOp<TA, TO>
{
fn clone(&self) -> MatrixUnOp<TA, TO>
{
MatrixUnOp{ a: self.a.clone(), o: self.o.clone() }
}
}
impl<TA: MatrixRawGet + MatrixShape,
TO: UnOp>
MatrixRawGet for
MatrixUnOp<TA, TO>
{
unsafe fn raw_get(&self, r: usize, c: usize) -> f64
{
self.o.op(self.a.raw_get(r, c))
}
}
impl<TA: MatrixShape,
TO: UnOp>
MatrixShape for
MatrixUnOp<TA, TO>
{
fn nrow(&self) -> usize
{
self.a.nrow()
}
fn ncol(&self) -> usize
{
self.a.ncol()
}
}
impl<TA: MatrixShape,
TO: UnOp>
SameShape for
MatrixUnOp<TA, TO>
{
fn same_shape(&self, nrow: usize, ncol: usize) -> bool
{
self.nrow() == nrow && self.ncol() == ncol
}
}
impl<TA: MatrixRawGet + MatrixShape,
TO: UnOp>
fmt::Display for
MatrixUnOp<TA, TO>
{
fn fmt(&self, buf: &mut fmt::Formatter) -> fmt::Result
{
write_mat(buf, self)
}
}
impl<TA: MatrixRawGet + Clone + MatrixShape,
TO: UnOp + Clone>
Neg for
MatrixUnOp<TA, TO>
{
type Output = MatrixUnOp<MatrixUnOp<TA, TO>, OpNeg>;
fn neg(self) -> MatrixUnOp<MatrixUnOp<TA, TO>, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}
impl<TA: MatrixRawGet + Clone + MatrixShape,
TB: Clone,
TO: BinOp + Clone>
Neg for
MatrixBinOp<TA, TB, TO>
{
type Output = MatrixUnOp<MatrixBinOp<TA, TB, TO>, OpNeg>;
fn neg(self) -> MatrixUnOp<MatrixBinOp<TA, TB, TO>, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}
impl<'l>
Neg for
&'l Matrix
{
type Output = MatrixUnOp<&'l Matrix, OpNeg>;
fn neg(self) -> MatrixUnOp<&'l Matrix, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}
impl<T: MatrixShape + Clone>
Neg for
RowAccessor<T>
{
type Output = MatrixUnOp<RowAccessor<T>, OpNeg>;
fn neg(self) -> MatrixUnOp<RowAccessor<T>, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}
impl<T: MatrixShape + Clone>
Neg for
ColumnAccessor<T>
{
type Output = MatrixUnOp<ColumnAccessor<T>, OpNeg>;
fn neg(self) -> MatrixUnOp<ColumnAccessor<T>, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}
impl<T: MatrixShape + Clone>
Neg for
Transposer<T>
{
type Output = MatrixUnOp<Transposer<T>, OpNeg>;
fn neg(self) -> MatrixUnOp<Transposer<T>, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}
impl<T: MatrixShape + Clone>
Neg for
View<T>
{
type Output = MatrixUnOp<View<T>, OpNeg>;
fn neg(self) -> MatrixUnOp<View<T>, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}
impl<T: MatrixShape + Clone>
Neg for
Slice<T>
{
type Output = MatrixUnOp<Slice<T>, OpNeg>;
fn neg(self) -> MatrixUnOp<Slice<T>, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}
impl<T: MatrixShape + Clone>
Neg for
Reshape<T>
{
type Output = MatrixUnOp<Reshape<T>, OpNeg>;
fn neg(self) -> MatrixUnOp<Reshape<T>, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}
impl<T1: MatrixShape + Clone,
T2: MatrixShape + Clone>
Neg for
MatrixMul<T1, T2>
{
type Output = MatrixUnOp<MatrixMul<T1, T2>, OpNeg>;
fn neg(self) -> MatrixUnOp<MatrixMul<T1, T2>, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}
impl<T1: MatrixShape + Clone,
T2: MatrixShape + Clone>
Neg for
HStack<T1, T2>
{
type Output = MatrixUnOp<HStack<T1, T2>, OpNeg>;
fn neg(self) -> MatrixUnOp<HStack<T1, T2>, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}
impl<T1: MatrixShape + Clone,
T2: MatrixShape + Clone>
Neg for
VStack<T1, T2>
{
type Output = MatrixUnOp<VStack<T1, T2>, OpNeg>;
fn neg(self) -> MatrixUnOp<VStack<T1, T2>, OpNeg>
{
MatrixUnOp::new(self.clone(), OpNeg::new())
}
}