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use {Range, RpPackage};
use errors::Result;
use std::fmt;
#[derive(Debug, Serialize, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct RpRequiredPackage {
pub package: RpPackage,
pub range: Range,
}
impl RpRequiredPackage {
pub fn new(package: RpPackage, range: Range) -> RpRequiredPackage {
RpRequiredPackage {
package: package,
range: range,
}
}
pub fn parse(input: &str) -> Result<RpRequiredPackage> {
let mut it = input.splitn(2, '@').into_iter();
let package = it.next()
.map(RpPackage::parse)
.unwrap_or_else(RpPackage::empty);
let range = if let Some(version) = it.next() {
Range::parse(version).map_err(|e| format!("bad version: {}: {}", e, version))?
} else {
Range::any()
};
Ok(RpRequiredPackage::new(package, range))
}
}
impl fmt::Display for RpRequiredPackage {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}@{}", self.package, self.range)
}
}