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#[macro_export]
macro_rules! impl_numeric_input_with_stringops {
($numeric_input: ident, $type_name: literal, $type: ty, $underlying_numeric_type: ty) => {
impl_numeric_input_with_stringops!(
$numeric_input,
$type_name,
$type,
$underlying_numeric_type,
<$type>::MIN,
<$type>::MAX
);
};
($numeric_input: ident, $type_name: literal, $type: ty, $underlying_numeric_type: ty, $min: expr, $max: expr) => {
impl structform::ParseAndFormat<$type> for $numeric_input<$type> {
fn parse(value: &str) -> Result<$type, ParseError> {
use std::convert::TryFrom;
let trimmed = value.trim();
if trimmed.is_empty() {
Err(ParseError::Required)
} else {
trimmed
.parse::<$underlying_numeric_type>()
.map_err(|_e| ParseError::NumberOutOfRange {
required_type: $type_name.to_string(),
min: $min.to_string(),
max: $max.to_string(),
})
.and_then(|via| {
<$type>::try_from(via)
.map_err(|e| ParseError::FromStrError(e.to_string()))
})
}
}
fn format(value: &$type) -> String {
value.to_string()
}
}
impl structform::ParseAndFormat<Option<$type>> for $numeric_input<Option<$type>> {
fn parse(value: &str) -> Result<Option<$type>, structform::ParseError> {
use std::convert::TryFrom;
let trimmed = value.trim();
if trimmed.is_empty() {
Ok(None)
} else {
trimmed
.parse::<$underlying_numeric_type>()
.map_err(|_e| structform::ParseError::NumberOutOfRange {
required_type: $type_name.to_string(),
min: $min.to_string(),
max: $max.to_string(),
})
.and_then(|via| {
<$type>::try_from(via)
.map_err(|e| structform::ParseError::FromStrError(e.to_string()))
})
.map(Option::Some)
}
}
fn format(value: &Option<$type>) -> String {
match value {
None => "".to_string(),
Some(inner) => inner.to_string(),
}
}
}
};
}
#[macro_export]
macro_rules! impl_numeric_input_with_default_with_stringops {
($numeric_input: ident, $type_name: literal, $type: ty, $underlying_numeric_type: ty) => {
impl_numeric_input_with_default_with_stringops!(
$numeric_input,
$type_name,
$type,
$underlying_numeric_type,
<$type>::MIN,
<$type>::MAX
);
};
($numeric_input: ident, $type_name: literal, $type: ty, $underlying_numeric_type: ty, $min: expr, $max: expr) => {
impl structform::ParseAndFormat<$type> for $numeric_input<$type> {
fn parse(value: &str) -> Result<$type, ParseError> {
use std::convert::TryFrom;
let trimmed = value.trim();
if trimmed.is_empty() {
Ok(<$type>::default())
} else {
trimmed
.parse::<$underlying_numeric_type>()
.map_err(|_e| ParseError::NumberOutOfRange {
required_type: $type_name.to_string(),
min: $min.to_string(),
max: $max.to_string(),
})
.and_then(|via| {
<$type>::try_from(via)
.map_err(|e| ParseError::FromStrError(e.to_string()))
})
}
}
fn format(value: &$type) -> String {
value.to_string()
}
}
};
}