Trait zero_copy_pads::ExcessHandler[−][src]

pub trait ExcessHandler<Value, PadBlock = char> where
    Value: Width,
    PadBlock: Display, {
    fn handle_excess(
        &self, 
        excess: Excess<'_, Value, PadBlock>, 
        formatter: &mut Formatter<'_>
    ) -> Result<(), Error>;
}

What to do when the width of the value exceeds total.

Example: Truncate to make it fit

use zero_copy_pads::{ExcessHandler, Excess, PaddedValue, AlignRight};
use std::fmt::{Formatter, Result};
struct TruncateExcessiveString;
impl ExcessHandler<&str> for TruncateExcessiveString {
    fn handle_excess(&self, excess: Excess<&str>, formatter: &mut Formatter<'_>) -> Result {
        let mut value = excess.value.to_string();
        value.truncate(excess.total_width);
        write!(formatter, "{}", value)
    }
}
let padded_value = PaddedValue {
    handle_excess: TruncateExcessiveString,
    value: "abcdefghi",
    total_width: 4,
    pad_block: ' ',
    pad: AlignRight,
};
assert_eq!(padded_value.to_string(), "abcd");

Required methods

fn handle_excess(
    &self,
    excess: Excess<'_, Value, PadBlock>,
    formatter: &mut Formatter<'_>
) -> Result<(), Error>[src]

Handle excessive width of a value.

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Implementors

impl<Value, PadBlock> ExcessHandler<Value, PadBlock> for ErrorOnExcess where
    Value: Width,
    PadBlock: Display, [src]

impl<Value, PadBlock> ExcessHandler<Value, PadBlock> for ExcessHandlingFunction<Value, PadBlock> where
    Value: Width,
    PadBlock: Display, [src]

impl<Value, PadBlock> ExcessHandler<Value, PadBlock> for IgnoreExcess where
    Value: Width,
    PadBlock: Display, [src]

impl<Value, PadBlock> ExcessHandler<Value, PadBlock> for PanicOnExcess where
    Value: Width,
    PadBlock: Display, [src]

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