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Switched fmt implementation to a macro, applied that macro to all formats in std

This commit is contained in:
Pierre Avital 2019-08-21 15:53:23 +02:00 committed by Sébastien Crozet
parent 6ee0e02612
commit b5f43c6efc
1 changed files with 77 additions and 136 deletions
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101
src/base/matrix.rs
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@ -1359,94 +1359,25 @@ where
}
}
impl<N, R: Dim, C: Dim, S> fmt::Display for Matrix<N, R, C, S>
where
N: Scalar + fmt::Display,
S: Storage<N, R, C>,
DefaultAllocator: Allocator<usize, R, C>,
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
#[cfg(feature = "std")]
fn val_width<N: Scalar + fmt::Display>(val: N, f: &mut fmt::Formatter) -> usize {
match f.precision() {
Some(precision) => format!("{:.1$}", val, precision).chars().count(),
None => format!("{}", val).chars().count(),
}
}
#[cfg(not(feature = "std"))]
fn val_width<N: Scalar + fmt::Display>(_: N, _: &mut fmt::Formatter) -> usize {
4
}
let (nrows, ncols) = self.data.shape();
if nrows.value() == 0 || ncols.value() == 0 {
return write!(f, "[ ]");
}
let mut max_length = 0;
let mut lengths: MatrixMN<usize, R, C> = Matrix::zeros_generic(nrows, ncols);
let (nrows, ncols) = self.shape();
for i in 0..nrows {
for j in 0..ncols {
lengths[(i, j)] = val_width(self[(i, j)], f);
max_length = crate::max(max_length, lengths[(i, j)]);
}
}
let max_length_with_space = max_length + 1;
writeln!(f)?;
writeln!(
f,
" ┌ {:>width$} ┐",
"",
width = max_length_with_space * ncols - 1
)?;
for i in 0..nrows {
write!(f, " │")?;
for j in 0..ncols {
let number_length = lengths[(i, j)] + 1;
let pad = max_length_with_space - number_length;
write!(f, " {:>thepad$}", "", thepad = pad)?;
match f.precision() {
Some(precision) => write!(f, "{:.1$}", (*self)[(i, j)], precision)?,
None => write!(f, "{}", (*self)[(i, j)])?,
}
}
writeln!(f, " │")?;
}
writeln!(
f,
" └ {:>width$} ┘",
"",
width = max_length_with_space * ncols - 1
)?;
writeln!(f)
}
}
impl<N, R: Dim, C: Dim, S> fmt::LowerExp for Matrix<N, R, C, S>
macro_rules! impl_fmt {
($trait: path, $fmt_str_without_precision: expr, $fmt_str_with_precision: expr) => {
impl<N, R: Dim, C: Dim, S> $trait for Matrix<N, R, C, S>
where
N: Scalar + fmt::LowerExp,
N: Scalar + $trait,
S: Storage<N, R, C>,
DefaultAllocator: Allocator<usize, R, C>,
{
{
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
#[cfg(feature = "std")]
fn val_width<N: Scalar + fmt::LowerExp>(val: N, f: &mut fmt::Formatter) -> usize {
fn val_width<N: Scalar + $trait>(val: N, f: &mut fmt::Formatter) -> usize {
match f.precision() {
Some(precision) => format!("{:.1$e}", val, precision).chars().count(),
None => format!("{:e}", val).chars().count(),
Some(precision) => format!($fmt_str_with_precision, val, precision).chars().count(),
None => format!($fmt_str_without_precision, val).chars().count(),
}
}
#[cfg(not(feature = "std"))]
fn val_width<N: Scalar + fmt::LowerExp>(_: N, _: &mut fmt::Formatter) -> usize {
fn val_width<N: Scalar + $trait>(_: N, _: &mut fmt::Formatter) -> usize {
4
}
@ -1484,8 +1415,8 @@ impl<N, R: Dim, C: Dim, S> fmt::LowerExp for Matrix<N, R, C, S>
let pad = max_length_with_space - number_length;
write!(f, " {:>thepad$}", "", thepad = pad)?;
match f.precision() {
Some(precision) => write!(f, "{:.1$e}", (*self)[(i, j)], precision)?,
None => write!(f, "{:e}", (*self)[(i, j)])?,
Some(precision) => write!(f, $fmt_str_with_precision, (*self)[(i, j)], precision)?,
None => write!(f, $fmt_str_without_precision, (*self)[(i, j)])?,
}
}
writeln!(f, " │")?;
@ -1499,7 +1430,17 @@ impl<N, R: Dim, C: Dim, S> fmt::LowerExp for Matrix<N, R, C, S>
)?;
writeln!(f)
}
}
};
}
impl_fmt!(fmt::Display, "{}", "{:.1$}");
impl_fmt!(fmt::LowerExp, "{:e}", "{:.1$e}");
impl_fmt!(fmt::UpperExp, "{:E}", "{:.1$E}");
impl_fmt!(fmt::Octal, "{:o}", "{:1$o}");
impl_fmt!(fmt::LowerHex, "{:x}", "{:1$x}");
impl_fmt!(fmt::UpperHex, "{:X}", "{:1$X}");
impl_fmt!(fmt::Binary, "{:b}", "{:.1$b}");
impl_fmt!(fmt::Pointer, "{:p}", "{:.1$p}");
#[test]
fn lower_exp() {