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Merge #3858

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3858: Hide unit function return types r=flodiebold a=lnicola

r? @flodiebold 

This might be a bit heavy-handed (e.g. `|| -> ()` to `||`), what do you think?

Co-authored-by: Laurențiu Nicola <lnicola@dend.ro>
This commit is contained in:
bors[bot] 2020-04-05 18:27:44 +00:00 committed by GitHub
commit bf2d91b26a
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 28 additions and 20 deletions
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20
crates/ra_hir_ty/src/display.rs
View file

@ -155,7 +155,11 @@ impl HirDisplay for ApplicationTy {
let sig = FnSig::from_fn_ptr_substs(&self.parameters);
write!(f, "fn(")?;
f.write_joined(sig.params(), ", ")?;
write!(f, ") -> {}", sig.ret().display(f.db))?;
write!(f, ")")?;
let ret = sig.ret();
if *ret != Ty::unit() {
write!(f, " -> {}", ret.display(f.db))?;
}
}
TypeCtor::FnDef(def) => {
let sig = f.db.callable_item_signature(def).subst(&self.parameters);
@ -180,7 +184,11 @@ impl HirDisplay for ApplicationTy {
}
write!(f, "(")?;
f.write_joined(sig.params(), ", ")?;
write!(f, ") -> {}", sig.ret().display(f.db))?;
write!(f, ")")?;
let ret = sig.ret();
if *ret != Ty::unit() {
write!(f, " -> {}", ret.display(f.db))?;
}
}
TypeCtor::Adt(def_id) => {
let name = match def_id {
@ -242,16 +250,16 @@ impl HirDisplay for ApplicationTy {
let sig = self.parameters[0]
.callable_sig(f.db)
.expect("first closure parameter should contain signature");
let return_type_hint = sig.ret().display(f.db);
if sig.params().is_empty() {
write!(f, "|| -> {}", return_type_hint)?;
write!(f, "||")?;
} else if f.omit_verbose_types() {
write!(f, "|{}| -> {}", TYPE_HINT_TRUNCATION, return_type_hint)?;
write!(f, "|{}|", TYPE_HINT_TRUNCATION)?;
} else {
write!(f, "|")?;
f.write_joined(sig.params(), ", ")?;
write!(f, "| -> {}", return_type_hint)?;
write!(f, "|")?;
};
write!(f, " -> {}", sig.ret().display(f.db))?;
}
}
Ok(())

8
crates/ra_hir_ty/src/tests/coercion.rs
View file

@ -407,16 +407,16 @@ fn test() {
[30; 31) 'x': &Foo
[39; 41) '{}': ()
[52; 133) '{ ...oo); }': ()
[58; 71) 'takes_ref_foo': fn takes_ref_foo(&Foo) -> ()
[58; 71) 'takes_ref_foo': fn takes_ref_foo(&Foo)
[58; 77) 'takes_...(&Foo)': ()
[72; 76) '&Foo': &Foo
[73; 76) 'Foo': Foo
[83; 96) 'takes_ref_foo': fn takes_ref_foo(&Foo) -> ()
[83; 96) 'takes_ref_foo': fn takes_ref_foo(&Foo)
[83; 103) 'takes_...&&Foo)': ()
[97; 102) '&&Foo': &&Foo
[98; 102) '&Foo': &Foo
[99; 102) 'Foo': Foo
[109; 122) 'takes_ref_foo': fn takes_ref_foo(&Foo) -> ()
[109; 122) 'takes_ref_foo': fn takes_ref_foo(&Foo)
[109; 130) 'takes_...&&Foo)': ()
[123; 129) '&&&Foo': &&&Foo
[124; 129) '&&Foo': &&Foo
@ -484,7 +484,7 @@ fn test() {
[171; 178) 'loop {}': !
[176; 178) '{}': ()
[191; 236) '{ ... }); }': ()
[197; 210) 'takes_ref_str': fn takes_ref_str(&str) -> ()
[197; 210) 'takes_ref_str': fn takes_ref_str(&str)
[197; 233) 'takes_...g() })': ()
[211; 232) '&{ ret...ng() }': &String
[212; 232) '{ retu...ng() }': String

2
crates/ra_hir_ty/src/tests/regression.rs
View file

@ -376,7 +376,7 @@ fn issue_2669() {
),
@r###"
[147; 262) '{ ... }': ()
[161; 164) 'end': fn end<{unknown}>() -> ()
[161; 164) 'end': fn end<{unknown}>()
[161; 166) 'end()': ()
[199; 252) '{ ... }': ()
[221; 223) '_x': !

6
crates/ra_hir_ty/src/tests/simple.rs
View file

@ -521,7 +521,7 @@ fn test() -> &mut &f64 {
[88; 89) 'a': u32
[92; 108) 'unknow...nction': {unknown}
[92; 110) 'unknow...tion()': u32
[116; 125) 'takes_u32': fn takes_u32(u32) -> ()
[116; 125) 'takes_u32': fn takes_u32(u32)
[116; 128) 'takes_u32(a)': ()
[126; 127) 'a': u32
[138; 139) 'b': i32
@ -1749,9 +1749,9 @@ fn main() {
[67; 91) 'Vtable...| {} }': Vtable
[84; 89) '|| {}': || -> ()
[87; 89) '{}': ()
[101; 102) 'm': fn() -> ()
[101; 102) 'm': fn()
[105; 111) 'vtable': Vtable
[105; 118) 'vtable.method': fn() -> ()
[105; 118) 'vtable.method': fn()
"###
);
}

12
crates/ra_hir_ty/src/tests/traits.rs
View file

@ -263,7 +263,7 @@ fn test() {
[119; 120) 'S': S<u32>(u32) -> S<u32>
[119; 129) 'S(unknown)': S<u32>
[121; 128) 'unknown': u32
[135; 138) 'foo': fn foo<S<u32>>(S<u32>) -> ()
[135; 138) 'foo': fn foo<S<u32>>(S<u32>)
[135; 141) 'foo(s)': ()
[139; 140) 's': S<u32>
"###
@ -962,7 +962,7 @@ fn test(x: impl Trait<u64>, y: &impl Trait<u32>) {
[224; 225) 'S': S<u16>(u16) -> S<u16>
[224; 228) 'S(1)': S<u16>
[226; 227) '1': u16
[234; 237) 'bar': fn bar(S<u16>) -> ()
[234; 237) 'bar': fn bar(S<u16>)
[234; 240) 'bar(z)': ()
[238; 239) 'z': S<u16>
[246; 247) 'x': impl Trait<u64>
@ -1108,8 +1108,8 @@ fn test() {
[40; 47) 'loop {}': !
[45; 47) '{}': ()
[91; 124) '{ ...foo; }': ()
[101; 102) 'f': fn(S) -> ()
[118; 121) 'foo': fn foo(S) -> ()
[101; 102) 'f': fn(S)
[118; 121) 'foo': fn foo(S)
"###
);
}
@ -1962,7 +1962,7 @@ fn test() -> impl Trait<i32> {
[229; 241) 'S(default())': S<u32>
[231; 238) 'default': fn default<u32>() -> u32
[231; 240) 'default()': u32
[247; 250) 'foo': fn foo(S<u32>) -> ()
[247; 250) 'foo': fn foo(S<u32>)
[247; 254) 'foo(s1)': ()
[251; 253) 's1': S<u32>
[264; 265) 'x': i32
@ -2012,7 +2012,7 @@ fn main() {
[147; 149) '_v': F
[192; 195) '{ }': ()
[207; 238) '{ ... }); }': ()
[213; 223) 'f::<(), _>': fn f<(), |&()| -> ()>(|&()| -> ()) -> ()
[213; 223) 'f::<(), _>': fn f<(), |&()| -> ()>(|&()| -> ())
[213; 235) 'f::<()... z; })': ()
[224; 234) '|z| { z; }': |&()| -> ()
[225; 226) 'z': &()