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// rustfmt-edition: 2024
fn main() {
if let x = x
&& x
{}
if xxx && let x = x {}
if aaaaaaaaaaaaaaaaaaaaa
&& aaaaaaaaaaaaaaa
&& aaaaaaaaa
&& let Some(x) = xxxxxxxxxxxx
&& aaaaaaa
&& let None = aaaaaaaaaa
{}
if aaaaaaaaaaaaaaaaaaaaa
&& aaaaaaaaaaaaaaa
&& aaaaaaaaa
&& let Some(x) = xxxxxxxxxxxx
&& aaaaaaa
&& let None = aaaaaaaaaa
{}
if let Some(Struct { x: TS(1, 2) }) = path::to::<_>(hehe)
&& let [Simple, people] = /* get ready */
create_universe(/* hi */ GreatPowers)
.initialize_badminton()
.populate_swamps()
&& let everybody = (Loops {
hi, /*hi*/
..loopy()
})
&& summons::triumphantly()
{
todo!()
}
if let XXXXXXXXX {
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,
yyyyyyyyyyyyy,
zzzzzzzzzzzzz,
} = xxxxxxx()
&& let Foo = bar()
{
todo!()
}
}
fn test_single_line_let_chain() {
// first item in let-chain is an ident
if a && let Some(b) = foo() {}
// first item in let-chain is a bool literal
if true && let Some(x) = y {}
// first item in let-chain is a unary ! with an ident
let unary_not = if !from_hir_call && let Some(p) = parent {};
// first item in let-chain is a unary * with an ident
let unary_deref = if *some_deref && let Some(p) = parent {};
// first item in let-chain is a unary - (neg) with an ident
let unary_neg = if -some_ident && let Some(p) = parent {};
// first item in let-chain is a try (?) with an ident
let try_ = if some_try? && let Some(p) = parent {};
// first item in let-chain is an ident wrapped in parens
let in_parens = if (some_ident) && let Some(p) = parent {};
// first item in let-chain is a ref & with an ident
let _ref = if &some_ref && let Some(p) = parent {};
// first item in let-chain is a ref &mut with an ident
let mut_ref = if &mut some_ref && let Some(p) = parent {};
// chain unary ref and try
let chain_of_unary_ref_and_try = if !&*some_ref? && let Some(p) = parent {};
}
fn test_multi_line_let_chain() {
// Can only single line the let-chain if the first item is an ident
if let Some(x) = y
&& a
{}
// More than one let-chain must be formatted on multiple lines
if let Some(x) = y
&& let Some(a) = b
{}
// The ident isn't long enough so we don't wrap the first let-chain
if a && let Some(x) = y
&& let Some(a) = b
{}
// The ident is long enough so both let-chains are wrapped
if aaa
&& let Some(x) = y
&& let Some(a) = b
{}
// function call
if a()
&& let Some(x) = y
{}
// cast to a bool
if 1 as bool
&& let Some(x) = y
{}
// matches! macro call
if matches!(a, some_type)
&& let Some(x) = y
{}
// block expression returning bool
if { true }
&& let Some(x) = y
{}
// field access
if a.x
&& let Some(x) = y
{}
}
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