if let Some(ref ty) = self.ty {
let separator = type_annotation_separator(context.config);
- let indent = shape.indent + last_line_width(&result) + separator.len();
- // 1 = ;
- let budget = shape.width.checked_sub(indent.width() + 1)?;
- let rewrite = ty.rewrite(context, Shape::legacy(budget, indent))?;
+ let ty_shape = if pat_str.contains('\n') {
+ shape.with_max_width(context.config)
+ } else {
+ shape
+ }
+ .offset_left(last_line_width(&result) + separator.len())?
+ // 2 = ` =`
+ .sub_width(2)?;
+
+ let rewrite = ty.rewrite(context, ty_shape)?;
infix.push_str(separator);
infix.push_str(&rewrite);
BracePos::Auto
},
self.block_indent,
- mk_sp(span.lo(), body_start),
+ // make a span that starts right after `enum Foo`
+ mk_sp(ident.span.hi(), body_start),
last_line_width(&enum_header),
- ).unwrap();
+ )
+ .unwrap();
self.push_str(&generics_str);
self.last_pos = body_start;
let original_offset = self.block_indent;
self.block_indent = self.block_indent.block_indent(self.config);
+ // If enum variants have discriminants, try to vertically align those,
+ // provided the discrims are not shifted too much to the right
+ let align_threshold: usize = self.config.enum_discrim_align_threshold();
+ let discr_ident_lens: Vec<usize> = enum_def
+ .variants
+ .iter()
+ .filter(|var| var.node.disr_expr.is_some())
+ .map(|var| rewrite_ident(&self.get_context(), var.node.ident).len())
+ .collect();
+ // cut the list at the point of longest discrim shorter than the threshold
+ // All of the discrims under the threshold will get padded, and all above - left as is.
+ let pad_discrim_ident_to = *discr_ident_lens
+ .iter()
+ .filter(|&l| *l <= align_threshold)
+ .max()
+ .unwrap_or(&0);
+
let itemize_list_with = |one_line_width: usize| {
itemize_list(
self.snippet_provider,
}
},
|f| f.span.hi(),
- |f| self.format_variant(f, one_line_width),
+ |f| self.format_variant(f, one_line_width, pad_discrim_ident_to),
body_lo,
body_hi,
false,
- ).collect()
+ )
+ .collect()
};
let mut items: Vec<_> =
itemize_list_with(self.config.width_heuristics().struct_variant_width);
}
// Variant of an enum.
- fn format_variant(&self, field: &ast::Variant, one_line_width: usize) -> Option<String> {
+ fn format_variant(
+ &self,
+ field: &ast::Variant,
+ one_line_width: usize,
+ pad_discrim_ident_to: usize,
+ ) -> Option<String> {
if contains_skip(&field.node.attrs) {
let lo = field.node.attrs[0].span.lo();
let span = mk_sp(lo, field.span.hi());
)?,
ast::VariantData::Unit(..) => {
if let Some(ref expr) = field.node.disr_expr {
- let lhs = format!("{} =", rewrite_ident(&context, field.node.ident));
+ let lhs = format!(
+ "{:1$} =",
+ rewrite_ident(&context, field.node.ident),
+ pad_discrim_ident_to
+ );
rewrite_assign_rhs(&context, lhs, &*expr.value, shape)?
} else {
rewrite_ident(&context, field.node.ident).to_owned()
let outer_indent_str = offset.block_only().to_string_with_newline(context.config);
result.push_str(&inner_indent_str);
- result.push_str(visitor.buffer.to_string().trim());
+ result.push_str(visitor.buffer.trim());
result.push_str(&outer_indent_str);
- }
-
- if result.ends_with('{') && !context.config.empty_item_single_line() {
+ } else if need_newline || !context.config.empty_item_single_line() {
result.push_str(&sep);
}
+
result.push('}');
Some(result)
let snippet = context.snippet(item.span);
let open_pos = snippet.find_uncommented("{")? + 1;
+ let outer_indent_str = offset.block_only().to_string_with_newline(context.config);
if !trait_items.is_empty() || contains_comment(&snippet[open_pos..]) {
let mut visitor = FmtVisitor::from_context(context);
visitor.format_missing(item.span.hi() - BytePos(1));
let inner_indent_str = visitor.block_indent.to_string_with_newline(context.config);
- let outer_indent_str = offset.block_only().to_string_with_newline(context.config);
result.push_str(&inner_indent_str);
- result.push_str(visitor.buffer.to_string().trim());
+ result.push_str(visitor.buffer.trim());
result.push_str(&outer_indent_str);
} else if result.contains('\n') {
- result.push('\n');
+ result.push_str(&outer_indent_str);
}
result.push('}');
context.config.brace_style(),
BracePos::None,
offset,
- mk_sp(generics.span.lo(), hi),
+ // make a span that starts right after `struct Foo`
+ mk_sp(p.ident.span.hi(), hi),
last_line_width(&header_str),
)?
} else {
let header_str = struct_parts.format_header(context);
result.push_str(&header_str);
- let header_hi = span.lo() + BytePos(header_str.len() as u32);
+ let header_hi = struct_parts.ident.span.hi();
let body_lo = context.snippet_provider.span_after(span, "{");
let generics_str = match struct_parts.generics {
BracePos::Auto
},
offset,
+ // make a span that starts right after `struct Foo`
mk_sp(header_hi, body_lo),
last_line_width(&result),
)?,
{
result.push('\n');
result.push_str(&offset.to_string(context.config));
- result.push_str(generics_str.trim_left());
+ result.push_str(generics_str.trim_start());
} else {
result.push_str(&generics_str);
}
let items_str = rewrite_with_alignment(
fields,
context,
- Shape::indented(offset, context.config).sub_width(1)?,
+ Shape::indented(offset.block_indent(context.config), context.config).sub_width(1)?,
mk_sp(body_lo, span.hi()),
one_line_budget,
)?;
format_empty_struct_or_tuple(context, inner_span, offset, &mut result, "(", ")");
} else {
let shape = Shape::indented(offset, context.config).sub_width(1)?;
- let fields = &fields.iter().collect::<Vec<_>>();
result = overflow::rewrite_with_parens(
context,
&result,
- fields,
+ fields.iter(),
shape,
span,
context.config.width_heuristics().fn_call_width,
result.push_str(suffix);
} else {
result.push_str(&indent.to_string_with_newline(context.config));
- result.push_str(suffix.trim_left());
+ result.push_str(suffix.trim_start());
}
// 1 = ";"
rewrite_ident(context, name),
type_annotation_spacing.0
),
- None => format!("{}", vis),
+ None => vis.to_string(),
})
}
for _ in 0..lhs_offset {
spacing.push(' ');
}
- // In this extreme case we will be missing a space betweeen an attribute and a field.
+ // In this extreme case we will be missing a space between an attribute and a field.
if prefix.is_empty() && !attrs_str.is_empty() && attrs_extendable && spacing.is_empty() {
spacing.push(' ');
}
let field_str = rewrite_assign_rhs(context, prefix, &*field.ty, shape)?;
// Remove a leading white-space from `rewrite_assign_rhs()` when rewriting a tuple struct.
let field_str = if is_prefix_empty {
- field_str.trim_left()
+ field_str.trim_start()
} else {
&field_str
};
lhs,
&**expr,
Shape::legacy(remaining_width, offset.block_only()),
- ).and_then(|res| recover_comment_removed(res, static_parts.span, context))
+ )
+ .and_then(|res| recover_comment_removed(res, static_parts.span, context))
.map(|s| if s.ends_with(';') { s } else { s + ";" })
} else {
Some(format!("{}{};", prefix, ty_str))
}
}
-fn is_empty_infer(context: &RewriteContext, ty: &ast::Ty) -> bool {
+fn is_empty_infer(ty: &ast::Ty, pat_span: Span) -> bool {
match ty.node {
- ast::TyKind::Infer => {
- let original = context.snippet(ty.span);
- original != "_"
- }
+ ast::TyKind::Infer => ty.span.hi() == pat_span.hi(),
_ => false,
}
}
.pat
.rewrite(context, Shape::legacy(shape.width, shape.indent))?;
- if !is_empty_infer(context, &*self.ty) {
+ if !is_empty_infer(&*self.ty, self.pat.span) {
if context.config.space_before_colon() {
result.push_str(" ");
}
let snuggle_angle_bracket = generics_str
.lines()
.last()
- .map_or(false, |l| l.trim_left().len() == 1);
+ .map_or(false, |l| l.trim_start().len() == 1);
// Note that the width and indent don't really matter, we'll re-layout the
// return type later anyway.
one_line_budget, multi_line_budget, arg_indent
);
+ result.push('(');
// Check if vertical layout was forced.
- if one_line_budget == 0 {
- if snuggle_angle_bracket {
- result.push('(');
- } else {
- result.push_str("(");
- if context.config.indent_style() == IndentStyle::Visual {
- result.push_str(&arg_indent.to_string_with_newline(context.config));
- }
- }
- } else {
- result.push('(');
+ if one_line_budget == 0
+ && !snuggle_angle_bracket
+ && context.config.indent_style() == IndentStyle::Visual
+ {
+ result.push_str(&arg_indent.to_string_with_newline(context.config));
}
// Skip `pub(crate)`.
.map(|arg| {
arg.rewrite(context, Shape::legacy(multi_line_budget, arg_indent))
.unwrap_or_else(|| context.snippet(arg.span()).to_owned())
- }).collect::<Vec<_>>();
+ })
+ .collect::<Vec<_>>();
// Account for sugary self.
// FIXME: the comment for the self argument is dropped. This is blocked
return Some(ident.to_owned());
}
- let params = &generics.params.iter().map(|e| &*e).collect::<Vec<_>>();
+ let params = generics.params.iter();
overflow::rewrite_with_angle_brackets(context, ident, params, shape, generics.span)
}
span,
false,
false,
- ).map(|(s, _)| format!("{};", s)),
+ )
+ .map(|(s, _)| format!("{};", s)),
ast::ForeignItemKind::Static(ref ty, is_mutable) => {
// FIXME(#21): we're dropping potential comments in between the
// function keywords here.
projects / rust.git / blobdiff