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Remove duplication

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This commit is contained in:
Jeremy Kolb 2019-01-13 20:25:14 -05:00
parent 2d7b4cc548
commit da326dca60
1 changed files with 23 additions and 74 deletions
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97
crates/ra_ide_api/src/hover.rs
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@ -1,7 +1,7 @@
use ra_db::{Cancelable, SyntaxDatabase};
use ra_syntax::{
AstNode, SyntaxNode, TreeArc,
ast::{self, NameOwner, VisibilityOwner},
ast::self,
algo::{find_covering_node, find_node_at_offset, find_leaf_at_offset, visit::{visitor, Visitor}},
};
@ -137,80 +137,29 @@ impl NavigationTarget {
fn description(&self, db: &RootDatabase) -> Option<String> {
// TODO: After type inference is done, add type information to improve the output
let node = self.node(db)?;
// TODO: Refactor to be have less repetition
fn visit_node<T>(node: &T, label: &str) -> Option<String>
where
T: ast::NameOwner + ast::VisibilityOwner,
{
let mut string = node
.visibility()
.map(|v| format!("{} ", v.syntax().text()))
.unwrap_or_default();
string.push_str(label);
node.name()?.syntax().text().push_to(&mut string);
Some(string)
}
visitor()
.visit(|node: &ast::FnDef| {
let mut string = node
.visibility()
.map(|v| format!("{} ", v.syntax().text()))
.unwrap_or_default();
string.push_str("fn ");
node.name()?.syntax().text().push_to(&mut string);
Some(string)
})
.visit(|node: &ast::StructDef| {
let mut string = node
.visibility()
.map(|v| format!("{} ", v.syntax().text()))
.unwrap_or_default();
string.push_str("struct ");
node.name()?.syntax().text().push_to(&mut string);
Some(string)
})
.visit(|node: &ast::EnumDef| {
let mut string = node
.visibility()
.map(|v| format!("{} ", v.syntax().text()))
.unwrap_or_default();
string.push_str("enum ");
node.name()?.syntax().text().push_to(&mut string);
Some(string)
})
.visit(|node: &ast::TraitDef| {
let mut string = node
.visibility()
.map(|v| format!("{} ", v.syntax().text()))
.unwrap_or_default();
string.push_str("trait ");
node.name()?.syntax().text().push_to(&mut string);
Some(string)
})
.visit(|node: &ast::Module| {
let mut string = node
.visibility()
.map(|v| format!("{} ", v.syntax().text()))
.unwrap_or_default();
string.push_str("mod ");
node.name()?.syntax().text().push_to(&mut string);
Some(string)
})
.visit(|node: &ast::TypeDef| {
let mut string = node
.visibility()
.map(|v| format!("{} ", v.syntax().text()))
.unwrap_or_default();
string.push_str("type ");
node.name()?.syntax().text().push_to(&mut string);
Some(string)
})
.visit(|node: &ast::ConstDef| {
let mut string = node
.visibility()
.map(|v| format!("{} ", v.syntax().text()))
.unwrap_or_default();
string.push_str("const ");
node.name()?.syntax().text().push_to(&mut string);
Some(string)
})
.visit(|node: &ast::StaticDef| {
let mut string = node
.visibility()
.map(|v| format!("{} ", v.syntax().text()))
.unwrap_or_default();
string.push_str("static ");
node.name()?.syntax().text().push_to(&mut string);
Some(string)
})
.visit(|node: &ast::FnDef| visit_node(node, "fn "))
.visit(|node: &ast::StructDef| visit_node(node, "struct "))
.visit(|node: &ast::EnumDef| visit_node(node, "enum "))
.visit(|node: &ast::TraitDef| visit_node(node, "trait "))
.visit(|node: &ast::Module| visit_node(node, "mod "))
.visit(|node: &ast::TypeDef| visit_node(node, "type "))
.visit(|node: &ast::ConstDef| visit_node(node, "const "))
.visit(|node: &ast::StaticDef| visit_node(node, "static "))
.accept(&node)?
}
}