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use std::fmt;
use std::iter;
use crate::gen::rust::component::RustPathComponent;
use crate::gen::rust::ident::RustIdent;
use crate::gen::rust::path::RustPath;
#[derive(Default, Eq, PartialEq, Debug, Clone)]
pub(crate) struct RustRelativePath {
pub(crate) path: Vec<RustPathComponent>,
}
impl RustRelativePath {
pub fn into_path(self) -> RustPath {
RustPath {
absolute: false,
path: self,
}
}
pub fn _empty() -> RustRelativePath {
RustRelativePath { path: Vec::new() }
}
pub fn from_components<I: IntoIterator<Item = RustPathComponent>>(i: I) -> RustRelativePath {
RustRelativePath {
path: i.into_iter().collect(),
}
}
pub fn from_idents<I: IntoIterator<Item = RustIdent>>(i: I) -> RustRelativePath {
Self::from_components(i.into_iter().map(RustPathComponent::Ident))
}
pub fn is_empty(&self) -> bool {
self.path.is_empty()
}
pub fn first(&self) -> Option<RustPathComponent> {
self.path.iter().cloned().next()
}
pub fn remove_first(&mut self) -> Option<RustPathComponent> {
if self.path.is_empty() {
None
} else {
Some(self.path.remove(0))
}
}
pub fn prepend_ident(&mut self, ident: RustIdent) {
self.path.insert(0, RustPathComponent::Ident(ident));
}
pub fn append(mut self, path: RustRelativePath) -> RustRelativePath {
for c in path.path {
self.path.push(c);
}
self
}
pub fn push_ident(&mut self, ident: RustIdent) {
self.path.push(RustPathComponent::Ident(ident));
}
pub fn append_ident(mut self, ident: RustIdent) -> RustRelativePath {
self.push_ident(ident);
self
}
pub fn to_reverse(&self) -> RustRelativePath {
RustRelativePath::from_components(
iter::repeat(RustPathComponent::SUPER).take(self.path.len()),
)
}
}
impl fmt::Display for RustRelativePath {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
for (i, c) in self.path.iter().enumerate() {
if i != 0 {
write!(f, "::")?;
}
write!(f, "{}", c)?;
}
Ok(())
}
}
impl From<&'_ str> for RustRelativePath {
fn from(s: &str) -> Self {
assert!(!s.starts_with("::"), "path is absolute: {:?}", s);
RustRelativePath {
path: s.split("::").map(RustPathComponent::parse).collect(),
}
}
}
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