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use crate::syntax::symbol::Segment;
use crate::syntax::{Lifetimes, NamedType, Pair, Symbol};
use proc_macro2::{Ident, Span};
use std::fmt::{self, Display};
use std::iter;
use syn::parse::{Error, Result};
use syn::punctuated::Punctuated;
#[derive(Clone)]
pub struct ForeignName {
text: String,
span: Span,
}
impl Pair {
pub fn to_symbol(&self) -> Symbol {
let segments = self
.namespace
.iter()
.map(|ident| ident as &dyn Segment)
.chain(iter::once(&self.cxx as &dyn Segment));
Symbol::from_idents(segments)
}
pub fn to_fully_qualified(&self) -> String {
let mut fully_qualified = String::new();
for segment in &self.namespace {
fully_qualified += "::";
fully_qualified += &segment.to_string();
}
fully_qualified += "::";
fully_qualified += &self.cxx.to_string();
fully_qualified
}
}
impl NamedType {
pub fn new(rust: Ident) -> Self {
let generics = Lifetimes {
lt_token: None,
lifetimes: Punctuated::new(),
gt_token: None,
};
NamedType { rust, generics }
}
pub fn span(&self) -> Span {
self.rust.span()
}
}
impl ForeignName {
pub fn parse(text: &str, span: Span) -> Result<Self> {
// TODO: support C++ names containing whitespace (`unsigned int`) or
// non-alphanumeric characters (`operator++`).
match syn::parse_str::<Ident>(text) {
Ok(ident) => {
let text = ident.to_string();
Ok(ForeignName { text, span })
}
Err(err) => Err(Error::new(span, err)),
}
}
}
impl Display for ForeignName {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str(&self.text)
}
}
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