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|
//! FIXME: write short doc here
use crate::{
completion::{
completion_context::CompletionContext,
completion_item::{Builder, CompletionKind, Completions},
},
CompletionItem,
};
use hir::{Ty, TypeCtor};
use ra_syntax::{ast::AstNode, TextRange};
use ra_text_edit::TextEditBuilder;
fn postfix_snippet(ctx: &CompletionContext, label: &str, detail: &str, snippet: &str) -> Builder {
let edit = {
let receiver_range =
ctx.dot_receiver.as_ref().expect("no receiver available").syntax().text_range();
let delete_range = TextRange::from_to(receiver_range.start(), ctx.source_range().end());
let mut builder = TextEditBuilder::default();
builder.replace(delete_range, snippet.to_string());
builder.finish()
};
CompletionItem::new(CompletionKind::Postfix, ctx.source_range(), label)
.detail(detail)
.snippet_edit(edit)
}
fn is_bool_or_unknown(ty: Option<Ty>) -> bool {
if let Some(ty) = ty {
match ty {
Ty::Apply(at) => match at.ctor {
TypeCtor::Bool => true,
_ => false,
},
Ty::Unknown => true,
_ => false,
}
} else {
true
}
}
pub(super) fn complete_postfix(acc: &mut Completions, ctx: &CompletionContext) {
if let Some(dot_receiver) = &ctx.dot_receiver {
let receiver_text = dot_receiver.syntax().text().to_string();
let receiver_ty = ctx.analyzer.type_of(ctx.db, &dot_receiver);
if is_bool_or_unknown(receiver_ty) {
postfix_snippet(ctx, "if", "if expr {}", &format!("if {} {{$0}}", receiver_text))
.add_to(acc);
postfix_snippet(
ctx,
"while",
"while expr {}",
&format!("while {} {{\n$0\n}}", receiver_text),
)
.add_to(acc);
}
postfix_snippet(ctx, "not", "!expr", &format!("!{}", receiver_text)).add_to(acc);
postfix_snippet(ctx, "ref", "&expr", &format!("&{}", receiver_text)).add_to(acc);
postfix_snippet(ctx, "refm", "&mut expr", &format!("&mut {}", receiver_text)).add_to(acc);
postfix_snippet(
ctx,
"match",
"match expr {}",
&format!("match {} {{\n ${{1:_}} => {{$0\\}},\n}}", receiver_text),
)
.add_to(acc);
postfix_snippet(ctx, "dbg", "dbg!(expr)", &format!("dbg!({})", receiver_text)).add_to(acc);
postfix_snippet(ctx, "box", "Box::new(expr)", &format!("Box::new({})", receiver_text))
.add_to(acc);
}
}
#[cfg(test)]
mod tests {
use crate::completion::{do_completion, CompletionItem, CompletionKind};
use insta::assert_debug_snapshot;
fn do_postfix_completion(code: &str) -> Vec<CompletionItem> {
do_completion(code, CompletionKind::Postfix)
}
#[test]
fn postfix_completion_works_for_trivial_path_expression() {
assert_debug_snapshot!(
do_postfix_completion(
r#"
fn main() {
let bar = true;
bar.<|>
}
"#,
),
@r###"[
CompletionItem {
label: "box",
source_range: [89; 89),
delete: [85; 89),
insert: "Box::new(bar)",
detail: "Box::new(expr)",
},
CompletionItem {
label: "dbg",
source_range: [89; 89),
delete: [85; 89),
insert: "dbg!(bar)",
detail: "dbg!(expr)",
},
CompletionItem {
label: "if",
source_range: [89; 89),
delete: [85; 89),
insert: "if bar {$0}",
detail: "if expr {}",
},
CompletionItem {
label: "match",
source_range: [89; 89),
delete: [85; 89),
insert: "match bar {\n ${1:_} => {$0\\},\n}",
detail: "match expr {}",
},
CompletionItem {
label: "not",
source_range: [89; 89),
delete: [85; 89),
insert: "!bar",
detail: "!expr",
},
CompletionItem {
label: "ref",
source_range: [89; 89),
delete: [85; 89),
insert: "&bar",
detail: "&expr",
},
CompletionItem {
label: "refm",
source_range: [89; 89),
delete: [85; 89),
insert: "&mut bar",
detail: "&mut expr",
},
CompletionItem {
label: "while",
source_range: [89; 89),
delete: [85; 89),
insert: "while bar {\n$0\n}",
detail: "while expr {}",
},
]"###
);
}
#[test]
fn some_postfix_completions_ignored() {
assert_debug_snapshot!(
do_postfix_completion(
r#"
fn main() {
let bar: u8 = 12;
bar.<|>
}
"#,
),
@r###"[
CompletionItem {
label: "box",
source_range: [91; 91),
delete: [87; 91),
insert: "Box::new(bar)",
detail: "Box::new(expr)",
},
CompletionItem {
label: "dbg",
source_range: [91; 91),
delete: [87; 91),
insert: "dbg!(bar)",
detail: "dbg!(expr)",
},
CompletionItem {
label: "match",
source_range: [91; 91),
delete: [87; 91),
insert: "match bar {\n ${1:_} => {$0\\},\n}",
detail: "match expr {}",
},
CompletionItem {
label: "not",
source_range: [91; 91),
delete: [87; 91),
insert: "!bar",
detail: "!expr",
},
CompletionItem {
label: "ref",
source_range: [91; 91),
delete: [87; 91),
insert: "&bar",
detail: "&expr",
},
CompletionItem {
label: "refm",
source_range: [91; 91),
delete: [87; 91),
insert: "&mut bar",
detail: "&mut expr",
},
]"###
);
}
}
|
