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pub(crate) mod module;
use ra_syntax::{
ast::{self, AstNode, NameOwner},
text_utils::is_subrange,
};
#[derive(Debug, Clone)]
pub struct FnDescriptor {
pub name: String,
pub label: String,
pub ret_type: Option<String>,
pub params: Vec<String>,
}
impl FnDescriptor {
pub fn new(node: ast::FnDef) -> Option<Self> {
let name = node.name()?.text().to_string();
// Strip the body out for the label.
let label: String = if let Some(body) = node.body() {
let body_range = body.syntax().range();
let label: String = node
.syntax()
.children()
.filter(|child| !is_subrange(body_range, child.range()))
.map(|node| node.text().to_string())
.collect();
label
} else {
node.syntax().text().to_string()
};
let params = FnDescriptor::param_list(node);
let ret_type = node.ret_type().map(|r| r.syntax().text().to_string());
Some(FnDescriptor {
name,
ret_type,
params,
label,
})
}
fn param_list(node: ast::FnDef) -> Vec<String> {
let mut res = vec![];
if let Some(param_list) = node.param_list() {
if let Some(self_param) = param_list.self_param() {
res.push(self_param.syntax().text().to_string())
}
// Maybe use param.pat here? See if we can just extract the name?
//res.extend(param_list.params().map(|p| p.syntax().text().to_string()));
res.extend(
param_list
.params()
.filter_map(|p| p.pat())
.map(|pat| pat.syntax().text().to_string()),
);
}
res
}
}
|
