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Check format failures explicitly in visit_block

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This commit is contained in:
topecongiro 2017-05-04 00:21:51 +09:00
parent 6d14ac84a4
commit 58d957be3f
2 changed files with 11 additions and 18 deletions
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24
src/expr.rs
View File

@ -570,19 +570,6 @@ fn rewrite_closure(capture: ast::CaptureBy,
rewrite.map(|rw| format!("{} {}", prefix, rw))
}
fn no_weird_visual_indent(block_str: &str, context: &RewriteContext) -> bool {
let mut prev_indent_width = 0;
for line in block_str.lines() {
let cur_indent_width = line.find(|c: char| !c.is_whitespace()).unwrap_or(0);
if prev_indent_width > cur_indent_width + context.config.tab_spaces &&
line.find('}').unwrap_or(0) != cur_indent_width {
return false;
}
prev_indent_width = cur_indent_width;
}
true
}
fn rewrite_closure_block(block: &ast::Block,
prefix: String,
context: &RewriteContext,
@ -592,9 +579,7 @@ fn rewrite_closure(capture: ast::CaptureBy,
// closure is large.
if let Some(block_str) = block.rewrite(&context, shape) {
let block_threshold = context.config.closure_block_indent_threshold;
if (block_threshold < 0 ||
block_str.matches('\n').count() <= block_threshold as usize) &&
no_weird_visual_indent(&block_str, context) {
if block_threshold < 0 || block_str.matches('\n').count() <= block_threshold as usize {
if let Some(block_str) = block_str.rewrite(context, shape) {
return Some(format!("{} {}", prefix, block_str));
}
@ -697,8 +682,11 @@ impl Rewrite for ast::Block {
};
visitor.visit_block(self);
Some(format!("{}{}", prefix, visitor.buffer))
if visitor.failed {
None
} else {
Some(format!("{}{}", prefix, visitor.buffer))
}
}
}

5
src/visitor.rs
View File

@ -39,6 +39,7 @@ pub struct FmtVisitor<'a> {
// FIXME: use an RAII util or closure for indenting
pub block_indent: Indent,
pub config: &'a Config,
pub failed: bool,
}
impl<'a> FmtVisitor<'a> {
@ -65,6 +66,9 @@ impl<'a> FmtVisitor<'a> {
Shape::legacy(self.config.max_width -
self.block_indent.width(),
self.block_indent));
if rewrite.is_none() {
self.failed = true;
}
self.push_rewrite(stmt.span, rewrite);
}
ast::StmtKind::Mac(ref mac) => {
@ -457,6 +461,7 @@ impl<'a> FmtVisitor<'a> {
alignment: 0,
},
config: config,
failed: false,
}
}