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|
use std::fmt::Write;
use ra_syntax::ast::{self, AstNode, NameOwner, TypeAscriptionOwner, VisibilityOwner};
pub(crate) trait ShortLabel {
fn short_label(&self) -> Option<String>;
}
impl ShortLabel for ast::FnDef {
fn short_label(&self) -> Option<String> {
Some(crate::display::function_label(self))
}
}
impl ShortLabel for ast::StructDef {
fn short_label(&self) -> Option<String> {
short_label_from_node(self, "struct ")
}
}
impl ShortLabel for ast::EnumDef {
fn short_label(&self) -> Option<String> {
short_label_from_node(self, "enum ")
}
}
impl ShortLabel for ast::TraitDef {
fn short_label(&self) -> Option<String> {
short_label_from_node(self, "trait ")
}
}
impl ShortLabel for ast::Module {
fn short_label(&self) -> Option<String> {
short_label_from_node(self, "mod ")
}
}
impl ShortLabel for ast::TypeAliasDef {
fn short_label(&self) -> Option<String> {
short_label_from_node(self, "type ")
}
}
impl ShortLabel for ast::ConstDef {
fn short_label(&self) -> Option<String> {
short_label_from_ascribed_node(self, "const ")
}
}
impl ShortLabel for ast::StaticDef {
fn short_label(&self) -> Option<String> {
short_label_from_ascribed_node(self, "static ")
}
}
impl ShortLabel for ast::NamedFieldDef {
fn short_label(&self) -> Option<String> {
short_label_from_ascribed_node(self, "")
}
}
impl ShortLabel for ast::EnumVariant {
fn short_label(&self) -> Option<String> {
Some(self.name()?.text().to_string())
}
}
fn short_label_from_ascribed_node<T>(node: &T, prefix: &str) -> Option<String>
where
T: NameOwner + VisibilityOwner + TypeAscriptionOwner,
{
let mut buf = short_label_from_node(node, prefix)?;
if let Some(type_ref) = node.ascribed_type() {
write!(buf, ": {}", type_ref.syntax()).unwrap();
}
Some(buf)
}
fn short_label_from_node<T>(node: &T, label: &str) -> Option<String>
where
T: NameOwner + VisibilityOwner,
{
let mut buf = node.visibility().map(|v| format!("{} ", v.syntax())).unwrap_or_default();
buf.push_str(label);
buf.push_str(node.name()?.text().as_str());
Some(buf)
}
|
