}
Some((path, bound_ident)) => {
// If-let.
- let match_expr = {
- let happy_arm = {
- let pat = make::tuple_struct_pat(
- path,
- once(make::ext::simple_ident_pat(make::name("it")).into()),
- );
- let expr = {
- let path = make::ext::ident_path("it");
- make::expr_path(path)
- };
- make::match_arm(once(pat.into()), None, expr)
- };
-
- let sad_arm = make::match_arm(
- // FIXME: would be cool to use `None` or `Err(_)` if appropriate
- once(make::wildcard_pat().into()),
- None,
- early_expression,
- );
-
- make::expr_match(cond_expr, make::match_arm_list(vec![happy_arm, sad_arm]))
- };
-
- let let_stmt = make::let_stmt(bound_ident, None, Some(match_expr));
- let let_stmt = let_stmt.indent(if_indent_level);
- let_stmt.syntax().clone_for_update()
+ let pat = make::tuple_struct_pat(path, once(bound_ident));
+ let let_else_stmt = make::let_else_stmt(
+ pat.into(),
+ None,
+ cond_expr,
+ ast::make::tail_only_block_expr(early_expression),
+ );
+ let let_else_stmt = let_else_stmt.indent(if_indent_level);
+ let_else_stmt.syntax().clone_for_update()
}
};
r#"
fn main(n: Option<String>) {
bar();
- let n = match n {
- Some(it) => it,
- _ => return,
- };
+ let Some(n) = n else { return };
foo(n);
// comment
"#,
r#"
fn main() {
- let x = match Err(92) {
- Ok(it) => it,
- _ => return,
- };
+ let Ok(x) = Err(92) else { return };
foo(x);
}
"#,
r#"
fn main(n: Option<String>) {
bar();
- let n = match n {
- Some(it) => it,
- _ => return,
- };
+ let Some(n) = n else { return };
foo(n);
// comment
r#"
fn main(n: Option<String>) {
bar();
- let mut n = match n {
- Some(it) => it,
- _ => return,
- };
+ let Some(mut n) = n else { return };
foo(n);
// comment
r#"
fn main(n: Option<&str>) {
bar();
- let ref n = match n {
- Some(it) => it,
- _ => return,
- };
+ let Some(ref n) = n else { return };
foo(n);
// comment
r#"
fn main() {
while true {
- let n = match n {
- Some(it) => it,
- _ => continue,
- };
+ let Some(n) = n else { continue };
foo(n);
bar();
}
r#"
fn main() {
loop {
- let n = match n {
- Some(it) => it,
- _ => continue,
- };
+ let Some(n) = n else { continue };
foo(n);
bar();
}