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Possibility of using more than one attribute for the description

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TheAwiteb 2023-08-29 09:12:27 +03:00
parent c0fd07184b
commit 0d02c48afd
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GPG key ID: ABF818BD15DC2D34
1 changed files with 36 additions and 14 deletions
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50
crates/teloxide-macros/src/command_attr.rs
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@ -50,24 +50,23 @@ impl CommandAttrs {
pub fn from_attributes(attributes: &[Attribute]) -> Result<Self> {
use CommandAttrKind::*;
let docs = attributes
.iter()
.filter_map(|attr| parse_doc_comment(attr).map(|doc| (doc, attr.span())));
let docs = attributes.iter().filter_map(|attr| {
parse_doc_comment(attr)
.or_else(|| parse_command_description(attr))
.map(|doc| (doc, attr.span()))
});
let mut attributes = attributes.to_vec();
if docs.clone().count() != 0 {
if let Some(des_sp) = get_descripation_span(&attributes) {
return Err(compile_error_at(
"You cannot use doc comments and #[command(description = \"...\")] \
simultaneously\nYou can use only one of them",
des_sp,
));
}
// Remove all command description attributes, to avoid duplication
attributes.retain(|attr| !is_command_description(attr));
let description = docs.clone().map(|(doc, _)| doc).collect::<Vec<_>>().join("\n");
let sp = docs
.map(|(_, sp)| sp)
.reduce(|acc, sp| acc.join(sp).expect("The spans are in the same file"))
.expect("There is at least one doc comment");
// Insert a new command description attribute, with all descriptions and doc
// comments
let attr = Attribute::parse_outer
.parse2(quote_spanned! { sp => #[command(description = #description)] })?;
attributes.push(attr.into_iter().next().unwrap());
@ -149,21 +148,44 @@ fn is_command_attribute(a: &Attribute) -> bool {
}
}
/// Returns the span of the first attribute with a description meta item.
fn get_descripation_span(attrs: &[Attribute]) -> Option<Span> {
for attr in attrs {
fn is_command_description(attr: &Attribute) -> bool {
for token in attr.tokens.clone() {
if let TokenTree::Group(group) = token {
for token in group.stream() {
if let TokenTree::Ident(ident) = token {
if ident == "description" {
return Some(group.span());
return true;
}
}
}
}
}
false
}
fn parse_command_description(attr: &Attribute) -> Option<String> {
if is_command_attribute(attr) {
for token in attr.tokens.clone() {
if let TokenTree::Group(group) = token {
for token in group.stream() {
if let TokenTree::Ident(ident) = token {
if ident == "description" {
for token in group.stream() {
if let TokenTree::Literal(lit) = token {
let description = lit.to_string();
return Some(
lit.to_string().trim()[1..description.len() - 1]
.replace(r"\n", "\n"),
);
}
}
}
}
}
}
}
}
None
}