ide_completion/completions/keyword.rs
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//! Completes `where` and `for` keywords.
use syntax::ast::{self, Item};
use crate::{CompletionContext, Completions};
pub(crate) fn complete_for_and_where(
acc: &mut Completions,
ctx: &CompletionContext<'_>,
keyword_item: &ast::Item,
) {
let mut add_keyword = |kw, snippet| acc.add_keyword_snippet(ctx, kw, snippet);
match keyword_item {
Item::Impl(it) => {
if it.for_token().is_none() && it.trait_().is_none() && it.self_ty().is_some() {
add_keyword("for", "for $0");
}
add_keyword("where", "where $0");
}
Item::Enum(_)
| Item::Fn(_)
| Item::Struct(_)
| Item::Trait(_)
| Item::TypeAlias(_)
| Item::Union(_) => {
add_keyword("where", "where $0");
}
_ => (),
}
}
#[cfg(test)]
mod tests {
use expect_test::{expect, Expect};
use crate::tests::{check_edit, completion_list};
fn check(ra_fixture: &str, expect: Expect) {
let actual = completion_list(ra_fixture);
expect.assert_eq(&actual)
}
#[test]
fn test_else_edit_after_if() {
check_edit(
"else",
r#"fn quux() { if true { () } $0 }"#,
r#"fn quux() { if true { () } else {
$0
} }"#,
);
}
#[test]
fn test_keywords_after_unsafe_in_block_expr() {
check(
r"fn my_fn() { unsafe $0 }",
expect![[r#"
kw async
kw extern
kw fn
kw impl
kw trait
"#]],
);
}
#[test]
fn test_completion_await_impls_future() {
check(
r#"
//- minicore: future
use core::future::*;
struct A {}
impl Future for A {}
fn foo(a: A) { a.$0 }
"#,
expect![[r#"
me into_future() (as IntoFuture) fn(self) -> <Self as IntoFuture>::IntoFuture
kw await expr.await
sn box Box::new(expr)
sn call function(expr)
sn dbg dbg!(expr)
sn dbgr dbg!(&expr)
sn deref *expr
sn let let
sn letm let mut
sn match match expr {}
sn ref &expr
sn refm &mut expr
sn return return expr
sn unsafe unsafe {}
"#]],
);
check(
r#"
//- minicore: future
use std::future::*;
fn foo() {
let a = async {};
a.$0
}
"#,
expect![[r#"
me into_future() (use core::future::IntoFuture) fn(self) -> <Self as IntoFuture>::IntoFuture
kw await expr.await
sn box Box::new(expr)
sn call function(expr)
sn dbg dbg!(expr)
sn dbgr dbg!(&expr)
sn deref *expr
sn let let
sn letm let mut
sn match match expr {}
sn ref &expr
sn refm &mut expr
sn return return expr
sn unsafe unsafe {}
"#]],
);
}
#[test]
fn test_completion_await_impls_into_future() {
check(
r#"
//- minicore: future
use core::future::*;
struct A {}
impl IntoFuture for A {}
fn foo(a: A) { a.$0 }
"#,
expect![[r#"
me into_future() (as IntoFuture) fn(self) -> <Self as IntoFuture>::IntoFuture
kw await expr.await
sn box Box::new(expr)
sn call function(expr)
sn dbg dbg!(expr)
sn dbgr dbg!(&expr)
sn deref *expr
sn let let
sn letm let mut
sn match match expr {}
sn ref &expr
sn refm &mut expr
sn return return expr
sn unsafe unsafe {}
"#]],
);
}
#[test]
fn for_in_impl() {
check_edit(
"for",
r#"
struct X;
impl X $0 {}
"#,
r#"
struct X;
impl X for $0 {}
"#,
);
check_edit(
"for",
r#"
fn foo() {
struct X;
impl X $0 {}
}
"#,
r#"
fn foo() {
struct X;
impl X for $0 {}
}
"#,
);
check_edit(
"for",
r#"
fn foo() {
struct X;
impl X $0
}
"#,
r#"
fn foo() {
struct X;
impl X for $0
}
"#,
);
check_edit(
"for",
r#"
fn foo() {
struct X;
impl X { fn bar() { $0 } }
}
"#,
r#"
fn foo() {
struct X;
impl X { fn bar() { for $1 in $2 {
$0
} } }
}
"#,
);
}
#[test]
fn let_semi() {
cov_mark::check!(let_semi);
check_edit(
"match",
r#"
fn main() { let x = $0 }
"#,
r#"
fn main() { let x = match $1 {
$0
}; }
"#,
);
check_edit(
"if",
r#"
fn main() {
let x = $0
let y = 92;
}
"#,
r#"
fn main() {
let x = if $1 {
$0
};
let y = 92;
}
"#,
);
check_edit(
"loop",
r#"
fn main() {
let x = $0
bar();
}
"#,
r#"
fn main() {
let x = loop {
$0
};
bar();
}
"#,
);
}
#[test]
fn if_completion_in_match_guard() {
check_edit(
"if",
r"
fn main() {
match () {
() $0
}
}
",
r"
fn main() {
match () {
() if $0
}
}
",
)
}
#[test]
fn if_completion_in_match_arm_expr() {
check_edit(
"if",
r"
fn main() {
match () {
() => $0
}
}
",
r"
fn main() {
match () {
() => if $1 {
$0
}
}
}
",
)
}
#[test]
fn if_completion_in_match_arm_expr_block() {
check_edit(
"if",
r"
fn main() {
match () {
() => {
$0
}
}
}
",
r"
fn main() {
match () {
() => {
if $1 {
$0
}
}
}
}
",
)
}
}