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single_line_if tests
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16 files changed

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lines changed

‎tests/source/single-line-if-else.rs‎

Lines changed: 0 additions & 16 deletions
Original file line numberDiff line numberDiff line change
@@ -35,22 +35,6 @@ fn main() {
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do_something()
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}
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let a = if x { 1 } else { 3 };
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// if may be formatted on a single line if it is "short"
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// and only contain a single expression
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if true { return }
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if true {
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return
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}
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if true { return; }
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if a { let y = 1; return y }
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for i in 0..2 { if g == true { continue } }
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let x = if veeeeeeeeery_loooooong_condition() { aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa } else { bbbbbbbbbb };
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let x = if veeeeeeeeery_loooooong_condition() { aaaaaaaaaaaaaaaaaaaaaaaaa } else {

‎tests/source/single-line-simple-if.rs‎

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// rustfmt-single_line_simple_if: true
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// rustfmt-unstable_features: true
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fn main() {
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// if statements may be formatted on a single line if they are "short"
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// and only contain a single expression of 'return', 'continue' or 'break'
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if true { continue }
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if true {
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continue
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}
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// Default max width is 50
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if width == 50_characters_or_shorter { continue }
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if width == 51_characters_long_and_above { return }
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if name == super_duper_really_really_mega_ultra_giga_long_name_with_a_cherry_on_top { return }
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// More than 1 stmt means a new line, it is no longer 'simple'
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if a { let y = 1; return y; }
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// Adds a semicolon to 'return/continue/break' when put on a new line
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// (unless config has trailing_semicolon = false)
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if a { let y = 1; return y }
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// Will not work on fn or method calls (may change)
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if true { do_something() }
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// Will not work on an expression with trailing semicolon pre-format
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if true { return; }
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// Will not single line if there is an else block, even with single expressions
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if true { return } else { break }
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// Will not be single line if returns/breaks with a value
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for i in 0..2{
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if true { break }
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if true { break 2 }
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if true { return }
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if true { return 3 }
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}
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// Will not be single line if comment is in the block
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if true {
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// nope
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return
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}
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if true { /* nope 2 */ return }
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// Only works on if blocks, not other control flow
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for i in 0..2 { if i == 1 { continue } }
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for i in 0..2 {
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loop { if i == 1 { continue } }
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}
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// New line formatted here as 'loop' != 'return/continue/break'
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if i == 1 { loop { return } }
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// Works on labelled break/continue
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'gamer: loop { if true{ break 'gamer } }
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'gamer: loop { if true{ break 'gamer; } }
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let result = 'block: {
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if foo() { break 'block 1 }
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if bar() { break 'block 2; }
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3
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};
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#[allow(unused)]
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// Comments after attributes dont mess it up
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if true { return }
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#[cfg(target_os = "linux")]
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// Comments after attributes dont mess it up
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if name == super_duper_ultra_really_name { return }
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#[cfg(target_os = "linux")]
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/* Multiple lines dont mess this up */
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/* Multiple lines dont mess this up */
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if name == super_duper_ultra_really_name { return }
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// Works as intended with nested ifs and indents
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if true {
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if true { continue }
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if true { if true { continue } }
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} else if false {
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if true { if true { if width == 50_characters_or_shorter { continue } if width == 51_characters_long_and_above { return } } }
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} else {
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if true { return; }
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}
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// Works with complex conditions
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if matches!(x, Ok(Some(value))) { continue }
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if matches!(x, Ok(Some(value))) { kick_ball() }
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if matches!(x, Ok(Some(value))) && value.some_method_call(input) { break }
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if matches!(x, Ok(Some(value))) && value.some_method_call(input) { run_fast() }
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if matches!(x, Ok(Some(value))) && value.some_method_call(input) && single_line_if_is_allowed_at_all_ever { return }
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if matches!(x, Ok(Some(value))) && value.some_method_call(input) && single_line_if_is_allowed_at_all_ever { play_catch() }
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// Nested complex conditions
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if true {
102+
if matches!(x, Ok(Some(value))) { continue }
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if true { if matches!(x, Ok(Some(value))) && value.some_method_call(input) { break } }
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} else if false {
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if true { if true { if matches!(x, Ok(Some(value))) { continue } } }
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} else {
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if true { if true { if matches!(x, Ok(Some(value))) && value.some_method_call(input) && single_line_if_is_allowed_at_all_ever { return } } }
108+
}
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}

‎tests/source/single_line_if/false_0.rs‎

Lines changed: 43 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,43 @@
1+
// rustfmt-single_line_if_else_max_width: 0
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fn main() {
4+
let a = if 1 > 2 {
5+
unreachable!()
6+
} else {
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10
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};
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let a = if x { 1 } else if y { 2 } else { 3 };
11+
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if true { continue }
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if true {
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continue
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}
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if width == 50_characters_or_shorter { continue }
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if width == 51_characters_long_and_above { return }
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if name == super_duper_really_really_mega_ultra_giga_long_name_with_a_cherry_on_top { return }
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if true { return } else { break }
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let x = if true { return } else { break };
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27+
let b = if cond() {
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5
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} else {
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// Brief comment.
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10
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};
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let c = if cond() {
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statement();
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5
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} else {
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10
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};
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if cond() { statement(); } else { other_statement(); }
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}

‎tests/source/single_line_if/false_100.rs‎

Lines changed: 43 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,43 @@
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// rustfmt-single_line_if_else_max_width: 100
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fn main() {
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let a = if 1 > 2 {
5+
unreachable!()
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} else {
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10
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};
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let a = if x { 1 } else if y { 2 } else { 3 };
11+
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if true { continue }
13+
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if true {
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continue
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}
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if width == 50_characters_or_shorter { continue }
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if width == 51_characters_long_and_above { return }
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if name == super_duper_really_really_mega_ultra_giga_long_name_with_a_cherry_on_top { return }
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if true { return } else { break }
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let x = if true { return } else { break };
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27+
let b = if cond() {
28+
5
29+
} else {
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// Brief comment.
31+
10
32+
};
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34+
let c = if cond() {
35+
statement();
36+
37+
5
38+
} else {
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10
40+
};
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42+
if cond() { statement(); } else { other_statement(); }
43+
}

‎tests/source/single_line_if/false_50.rs‎

Lines changed: 43 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,43 @@
1+
// rustfmt-single_line_if_else_max_width: 50
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fn main() {
4+
let a = if 1 > 2 {
5+
unreachable!()
6+
} else {
7+
10
8+
};
9+
10+
let a = if x { 1 } else if y { 2 } else { 3 };
11+
12+
if true { continue }
13+
14+
if true {
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continue
16+
}
17+
18+
if width == 50_characters_or_shorter { continue }
19+
if width == 51_characters_long_and_above { return }
20+
21+
if name == super_duper_really_really_mega_ultra_giga_long_name_with_a_cherry_on_top { return }
22+
23+
if true { return } else { break }
24+
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let x = if true { return } else { break };
26+
27+
let b = if cond() {
28+
5
29+
} else {
30+
// Brief comment.
31+
10
32+
};
33+
34+
let c = if cond() {
35+
statement();
36+
37+
5
38+
} else {
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10
40+
};
41+
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if cond() { statement(); } else { other_statement(); }
43+
}

‎tests/source/single_line_if/true_0.rs‎

Lines changed: 45 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,45 @@
1+
// rustfmt-single_line_simple_if: true
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// rustfmt-unstable_features: true
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// rustfmt-single_line_if_else_max_width: 0
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5+
fn main() {
6+
let a = if 1 > 2 {
7+
unreachable!()
8+
} else {
9+
10
10+
};
11+
12+
let a = if x { 1 } else if y { 2 } else { 3 };
13+
14+
if true { continue }
15+
16+
if true {
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continue
18+
}
19+
20+
if width == 50_characters_or_shorter { continue }
21+
if width == 51_characters_long_and_above { return }
22+
23+
if name == super_duper_really_really_mega_ultra_giga_long_name_with_a_cherry_on_top { return }
24+
25+
if true { return } else { break }
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let x = if true { return } else { break };
28+
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let b = if cond() {
30+
5
31+
} else {
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// Brief comment.
33+
10
34+
};
35+
36+
let c = if cond() {
37+
statement();
38+
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5
40+
} else {
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10
42+
};
43+
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if cond() { statement(); } else { other_statement(); }
45+
}

‎tests/source/single_line_if/true_100.rs‎

Lines changed: 45 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,45 @@
1+
// rustfmt-single_line_simple_if: true
2+
// rustfmt-unstable_features: true
3+
// rustfmt-single_line_if_else_max_width: 100
4+
5+
fn main() {
6+
let a = if 1 > 2 {
7+
unreachable!()
8+
} else {
9+
10
10+
};
11+
12+
let a = if x { 1 } else if y { 2 } else { 3 };
13+
14+
if true { continue }
15+
16+
if true {
17+
continue
18+
}
19+
20+
if width == 50_characters_or_shorter { continue }
21+
if width == 51_characters_long_and_above { return }
22+
23+
if name == super_duper_really_really_mega_ultra_giga_long_name_with_a_cherry_on_top { return }
24+
25+
if true { return } else { break }
26+
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let x = if true { return } else { break };
28+
29+
let b = if cond() {
30+
5
31+
} else {
32+
// Brief comment.
33+
10
34+
};
35+
36+
let c = if cond() {
37+
statement();
38+
39+
5
40+
} else {
41+
10
42+
};
43+
44+
if cond() { statement(); } else { other_statement(); }
45+
}

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