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use crate::ast;
use crate::{Parse, ParseError, Parser, Spanned, ToTokens};
/// An impl item.
///
/// # Examples
///
/// ```rust
/// use rune::{testing, ast};
///
/// testing::roundtrip::<ast::ItemImpl>("impl Foo {}");
/// testing::roundtrip::<ast::ItemImpl>("impl Foo { fn test(self) { } }");
/// testing::roundtrip::<ast::ItemImpl>("#[variant(enum_= \"SuperHero\", x = \"1\")] impl Foo { fn test(self) { } }");
/// testing::roundtrip::<ast::ItemImpl>("#[xyz] impl Foo { #[jit] fn test(self) { } }");
/// ```
#[derive(Debug, Clone, PartialEq, Eq, ToTokens, Spanned)]
pub struct ItemImpl {
/// The attributes of the `impl` block
#[rune(iter)]
pub attributes: Vec<ast::Attribute>,
/// The `impl` keyword.
pub impl_: T![impl],
/// Path of the implementation.
pub path: ast::Path,
/// The open brace.
pub open: T!['{'],
/// The collection of functions.
pub functions: Vec<ast::ItemFn>,
/// The close brace.
pub close: T!['}'],
}
impl ItemImpl {
/// Parse an `impl` item with the given attributes.
pub fn parse_with_attributes(
parser: &mut Parser<'_>,
attributes: Vec<ast::Attribute>,
) -> Result<Self, ParseError> {
let impl_ = parser.parse()?;
let path = parser.parse()?;
let open = parser.parse()?;
let mut functions = vec![];
while !parser.peek::<ast::CloseBrace>()? {
functions.push(ast::ItemFn::parse(parser)?);
}
let close = parser.parse()?;
Ok(Self {
attributes,
impl_,
path,
open,
functions,
close,
})
}
}
item_parse!(Impl, ItemImpl, "impl item");