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IntoIterator implementation for elements and boxed elements. 

Closes #12.
This commit is contained in:
Bodil Stokke 2018-11-29 15:27:59 +00:00
parent b3ecb54ed8
commit 670fb934fb
1 changed files with 22 additions and 0 deletions
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22
macros/src/declare.rs
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@ -69,6 +69,7 @@ impl Declare {
stream.extend(self.impl_element()); stream.extend(self.impl_element());
stream.extend(self.impl_marker_traits()); stream.extend(self.impl_marker_traits());
stream.extend(self.impl_display()); stream.extend(self.impl_display());
stream.extend(self.impl_into_iter());
stream stream
} }
@ -263,6 +264,27 @@ impl Declare {
body body
} }
fn impl_into_iter(&self) -> TokenStream {
let elem_name = self.elem_name();
quote!(
impl<T> IntoIterator for #elem_name<T> where T: ::OutputType {
type Item = #elem_name<T>;
type IntoIter = std::vec::IntoIter<#elem_name<T>>;
fn into_iter(self) -> Self::IntoIter {
vec![self].into_iter()
}
}
impl<T> IntoIterator for Box<#elem_name<T>> where T: ::OutputType {
type Item = Box<#elem_name<T>>;
type IntoIter = std::vec::IntoIter<Box<#elem_name<T>>>;
fn into_iter(self) -> Self::IntoIter {
vec![self].into_iter()
}
}
)
}
fn impl_display(&self) -> TokenStream { fn impl_display(&self) -> TokenStream {
let elem_name = self.elem_name(); let elem_name = self.elem_name();
let name: TokenTree = Literal::string(&self.name.to_string()).into(); let name: TokenTree = Literal::string(&self.name.to_string()).into();