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Simplify some branch formatting logic

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Richard Feldman 2022-07-13 22:55:41 -04:00
parent fa877e4184
commit b51c8b0ba4
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1 changed files with 36 additions and 40 deletions
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76
crates/compiler/fmt/src/expr.rs
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@ -700,53 +700,49 @@ fn fmt_when<'a, 'buf>(
for (pattern_index, pattern) in patterns.iter().enumerate() {
if pattern_index == 0 {
match &pattern.value {
Pattern::SpaceBefore(sub_pattern, spaces) => {
let added_blank_line;
if let Pattern::SpaceBefore(sub_pattern, spaces) = &pattern.value {
let added_blank_line;
if branch_index > 0 // Never render newlines before the first branch.
&& matches!(spaces.first(), Some(CommentOrNewline::Newline))
{
if prev_branch_was_multiline {
// Multiline branches always get a full blank line after them.
buf.ensure_ends_with_blank_line();
added_blank_line = true;
} else {
buf.ensure_ends_with_newline();
added_blank_line = false;
}
// Never render newlines before the first branch.
if branch_index > 0 {
if prev_branch_was_multiline {
// Multiline branches always get a full blank line after them.
buf.ensure_ends_with_blank_line();
added_blank_line = true;
} else {
buf.ensure_ends_with_newline();
added_blank_line = false;
}
// Write comments (which may have been attached to the previous
// branch's expr, if there was a previous branch).
fmt_comments_only(buf, spaces.iter(), NewlineAt::Bottom, indent + INDENT);
if branch_index > 0 {
if prev_branch_was_multiline && !added_blank_line {
// Multiline branches always get a full blank line after them
// (which we may already have added before a comment).
buf.ensure_ends_with_blank_line();
} else {
buf.ensure_ends_with_newline();
}
}
fmt_pattern(buf, sub_pattern, indent + INDENT, Parens::NotNeeded);
} else {
added_blank_line = false;
}
other => {
if branch_index > 0 {
if prev_branch_was_multiline {
// Multiline branches always get a full blank line after them.
buf.ensure_ends_with_blank_line();
} else {
buf.ensure_ends_with_newline();
}
}
fmt_pattern(buf, other, indent + INDENT, Parens::NotNeeded);
// Write comments (which may have been attached to the previous
// branch's expr, if there was a previous branch).
fmt_comments_only(buf, spaces.iter(), NewlineAt::Bottom, indent + INDENT);
if branch_index > 0 {
if prev_branch_was_multiline && !added_blank_line {
// Multiline branches always get a full blank line after them
// (which we may already have added before a comment).
buf.ensure_ends_with_blank_line();
} else {
buf.ensure_ends_with_newline();
}
}
fmt_pattern(buf, sub_pattern, indent + INDENT, Parens::NotNeeded);
} else {
if branch_index > 0 {
if prev_branch_was_multiline {
// Multiline branches always get a full blank line after them.
buf.ensure_ends_with_blank_line();
} else {
buf.ensure_ends_with_newline();
}
}
fmt_pattern(buf, &pattern.value, indent + INDENT, Parens::NotNeeded);
}
} else {
if is_multiline_patterns {