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use std::str::FromStr;
use {
Error,
Result,
Stream,
WriteBuffer,
WriteOptions,
};
#[derive(Clone, PartialEq)]
pub struct NumberList(pub Vec<f64>);
impl_from_vec!(NumberList, NumberList, f64);
impl_vec_defer!(NumberList, f64);
impl_display!(NumberList);
impl_debug_from_display!(NumberList);
#[derive(Clone, Copy, PartialEq, Debug)]
pub struct NumberListParser<'a>(Stream<'a>);
impl<'a> From<&'a str> for NumberListParser<'a> {
fn from(v: &'a str) -> Self {
NumberListParser(Stream::from(v))
}
}
impl<'a> Iterator for NumberListParser<'a> {
type Item = Result<f64>;
fn next(&mut self) -> Option<Self::Item> {
if self.0.at_end() {
None
} else {
let v = self.0.parse_list_number();
if v.is_err() {
self.0.jump_to_end();
}
Some(v)
}
}
}
impl FromStr for NumberList {
type Err = Error;
fn from_str(text: &str) -> Result<Self> {
let mut vec = Vec::new();
for number in NumberListParser::from(text) {
vec.push(number?);
}
Ok(NumberList(vec))
}
}
#[cfg(test)]
mod tests {
use super::*;
use ListSeparator;
#[test]
fn write_1() {
let list = NumberList(vec![1.0, 2.0, 3.0]);
let mut opt = WriteOptions::default();
opt.list_separator = ListSeparator::Space;
assert_eq!(list.with_write_opt(&opt).to_string(), "1 2 3");
}
#[test]
fn write_2() {
let list = NumberList(vec![1.0, 2.0, 3.0]);
let mut opt = WriteOptions::default();
opt.list_separator = ListSeparator::Comma;
assert_eq!(list.with_write_opt(&opt).to_string(), "1,2,3");
}
#[test]
fn write_3() {
let list = NumberList(vec![1.0, 2.0, 3.0]);
let mut opt = WriteOptions::default();
opt.list_separator = ListSeparator::CommaSpace;
assert_eq!(list.with_write_opt(&opt).to_string(), "1, 2, 3");
}
}