format_expr, is_empty_block, is_simple_block_stmt, rewrite_assign_rhs, rewrite_assign_rhs_with,
ExprType, RhsTactics,
};
-use crate::lists::{
- definitive_tactic, extract_post_comment, extract_pre_comment, get_comment_end,
- has_extra_newline, itemize_list, write_list, ListFormatting, ListItem, Separator,
-};
+use crate::lists::{definitive_tactic, itemize_list, write_list, ListFormatting, Separator};
use crate::macros::{rewrite_macro, MacroPosition};
use crate::overflow;
use crate::rewrite::{Rewrite, RewriteContext};
) -> FnSig<'a> {
FnSig {
unsafety: method_sig.header.unsafety,
- is_async: method_sig.header.asyncness,
+ is_async: method_sig.header.asyncness.node,
constness: method_sig.header.constness.node,
defaultness: ast::Defaultness::Final,
abi: method_sig.header.abi,
generics,
abi: fn_header.abi,
constness: fn_header.constness.node,
- is_async: fn_header.asyncness,
+ is_async: fn_header.asyncness.node,
defaultness,
unsafety: fn_header.unsafety,
visibility: visibility.clone(),
impl Rewrite for ast::Arg {
fn rewrite(&self, context: &RewriteContext<'_>, shape: Shape) -> Option<String> {
- if is_named_arg(self) {
+ if let Some(ref explicit_self) = self.to_self() {
+ rewrite_explicit_self(context, explicit_self)
+ } else if is_named_arg(self) {
let mut result = self
.pat
.rewrite(context, Shape::legacy(shape.width, shape.indent))?;
}
fn rewrite_explicit_self(
- explicit_self: &ast::ExplicitSelf,
- args: &[ast::Arg],
context: &RewriteContext<'_>,
+ explicit_self: &ast::ExplicitSelf,
) -> Option<String> {
match explicit_self.node {
ast::SelfKind::Region(lt, m) => {
None => Some(format!("&{}self", mut_str)),
}
}
- ast::SelfKind::Explicit(ref ty, _) => {
- assert!(!args.is_empty(), "&[ast::Arg] shouldn't be empty.");
-
- let mutability = explicit_self_mutability(&args[0]);
+ ast::SelfKind::Explicit(ref ty, mutability) => {
let type_str = ty.rewrite(
context,
Shape::legacy(context.config.max_width(), Indent::empty()),
type_str
))
}
- ast::SelfKind::Value(_) => {
- assert!(!args.is_empty(), "&[ast::Arg] shouldn't be empty.");
-
- let mutability = explicit_self_mutability(&args[0]);
-
- Some(format!("{}self", format_mutability(mutability)))
- }
- }
-}
-
-// Hacky solution caused by absence of `Mutability` in `SelfValue` and
-// `SelfExplicit` variants of `ast::ExplicitSelf_`.
-fn explicit_self_mutability(arg: &ast::Arg) -> ast::Mutability {
- if let ast::PatKind::Ident(ast::BindingMode::ByValue(mutability), _, _) = arg.pat.node {
- mutability
- } else {
- unreachable!()
+ ast::SelfKind::Value(mutability) => Some(format!("{}self", format_mutability(mutability))),
}
}
let arg_str = rewrite_args(
context,
&fd.inputs,
- fd.get_self().as_ref(),
one_line_budget,
multi_line_budget,
indent,
arg_indent,
args_span,
- fd.variadic,
- generics_str.contains('\n'),
+ fd.c_variadic,
)?;
let put_args_in_block = match context.config.indent_style() {
fn rewrite_args(
context: &RewriteContext<'_>,
args: &[ast::Arg],
- explicit_self: Option<&ast::ExplicitSelf>,
one_line_budget: usize,
multi_line_budget: usize,
indent: Indent,
arg_indent: Indent,
span: Span,
variadic: bool,
- generics_str_contains_newline: bool,
) -> Option<String> {
- let terminator = ")";
- let separator = ",";
- let next_span_start = span.hi();
-
if args.len() == 0 {
let comment = context
.snippet(mk_sp(
.trim();
return Some(comment.to_owned());
}
-
- let mut arg_item_strs = args
- .iter()
- .map(|arg| {
+ let arg_items: Vec<_> = itemize_list(
+ context.snippet_provider,
+ args.iter(),
+ ")",
+ ",",
+ |arg| span_lo_for_arg(arg),
+ |arg| arg.ty.span.hi(),
+ |arg| {
arg.rewrite(context, Shape::legacy(multi_line_budget, arg_indent))
- .unwrap_or_else(|| context.snippet(arg.span()).to_owned())
- })
- .collect::<Vec<_>>();
-
- // Account for sugary self.
- let mut pre_comment_str = "";
- let mut post_comment_str = "";
- let min_args = explicit_self
- .and_then(|explicit_self| rewrite_explicit_self(explicit_self, args, context))
- .map_or(1, |self_str| {
- pre_comment_str = context.snippet(mk_sp(span.lo(), args[0].pat.span.lo()));
-
- let next_start = if args.len() > 1 {
- args[1].pat.span().lo()
- } else {
- span.hi()
- };
- post_comment_str = context.snippet(mk_sp(args[0].ty.span.hi(), next_start));
-
- arg_item_strs[0] = self_str;
- 2
- });
-
- // Comments between args.
- let mut arg_items = Vec::new();
- if min_args == 2 {
- arg_items.push(ListItem::from_str(""));
- }
-
- if args.len() >= min_args || variadic {
- let comment_span_start = if min_args == 2 {
- let remove_comma_byte_pos = context
- .snippet_provider
- .span_after(mk_sp(args[0].ty.span.hi(), args[1].pat.span.lo()), ",");
- let first_post_and_second_pre_span =
- mk_sp(remove_comma_byte_pos, args[1].pat.span.lo());
- if count_newlines(context.snippet(first_post_and_second_pre_span)) > 0 {
- context
- .snippet_provider
- .span_after(first_post_and_second_pre_span, "\n")
- } else {
- remove_comma_byte_pos
- }
- } else {
- span.lo()
- };
-
- enum ArgumentKind<'a> {
- Regular(&'a ast::Arg),
- Variadic(BytePos),
- }
-
- let variadic_arg = if variadic {
- let variadic_span = mk_sp(args.last().unwrap().ty.span.hi(), span.hi());
- let variadic_start =
- context.snippet_provider.span_after(variadic_span, "...") - BytePos(3);
- Some(ArgumentKind::Variadic(variadic_start))
- } else {
- None
- };
-
- let more_items = itemize_list(
- context.snippet_provider,
- args[min_args - 1..]
- .iter()
- .map(ArgumentKind::Regular)
- .chain(variadic_arg),
- terminator,
- separator,
- |arg| match *arg {
- ArgumentKind::Regular(arg) => span_lo_for_arg(arg),
- ArgumentKind::Variadic(start) => start,
- },
- |arg| match *arg {
- ArgumentKind::Regular(arg) => arg.ty.span.hi(),
- ArgumentKind::Variadic(start) => start + BytePos(3),
- },
- |arg| match *arg {
- ArgumentKind::Regular(..) => None,
- ArgumentKind::Variadic(..) => Some("...".to_owned()),
- },
- comment_span_start,
- next_span_start,
- false,
- );
-
- arg_items.extend(more_items);
- }
-
- let arg_items_len = arg_items.len();
- let fits_in_one_line = !generics_str_contains_newline
- && (arg_items.is_empty()
- || arg_items_len == 1 && arg_item_strs[0].len() <= one_line_budget);
-
- for (index, (item, arg)) in arg_items.iter_mut().zip(arg_item_strs).enumerate() {
- // add pre comment and post comment for first arg(self)
- if index == 0 && explicit_self.is_some() {
- let (pre_comment, pre_comment_style) = extract_pre_comment(pre_comment_str);
- item.pre_comment = pre_comment;
- item.pre_comment_style = pre_comment_style;
-
- let comment_end =
- get_comment_end(post_comment_str, separator, terminator, arg_items_len == 1);
-
- item.new_lines = has_extra_newline(post_comment_str, comment_end);
- item.post_comment = extract_post_comment(post_comment_str, comment_end, separator);
- }
- item.item = Some(arg);
- }
-
- let last_line_ends_with_comment = arg_items
- .iter()
- .last()
- .and_then(|item| item.post_comment.as_ref())
- .map_or(false, |s| s.trim().starts_with("//"));
-
- let (indent, trailing_comma) = match context.config.indent_style() {
- IndentStyle::Block if fits_in_one_line => {
- (indent.block_indent(context.config), SeparatorTactic::Never)
- }
- IndentStyle::Block => (
- indent.block_indent(context.config),
- context.config.trailing_comma(),
- ),
- IndentStyle::Visual if last_line_ends_with_comment => {
- (arg_indent, context.config.trailing_comma())
- }
- IndentStyle::Visual => (arg_indent, SeparatorTactic::Never),
- };
+ .or_else(|| Some(context.snippet(arg.span()).to_owned()))
+ },
+ span.lo(),
+ span.hi(),
+ false,
+ )
+ .collect();
let tactic = definitive_tactic(
&arg_items,
- context.config.fn_args_density().to_list_tactic(),
+ context
+ .config
+ .fn_args_density()
+ .to_list_tactic(arg_items.len()),
Separator::Comma,
one_line_budget,
);
DefinitiveListTactic::Horizontal => one_line_budget,
_ => multi_line_budget,
};
-
- debug!("rewrite_args: budget: {}, tactic: {:?}", budget, tactic);
-
+ let indent = match context.config.indent_style() {
+ IndentStyle::Block => indent.block_indent(context.config),
+ IndentStyle::Visual => arg_indent,
+ };
let trailing_separator = if variadic {
SeparatorTactic::Never
} else {
- trailing_comma
+ match context.config.indent_style() {
+ IndentStyle::Block => context.config.trailing_comma(),
+ IndentStyle::Visual => SeparatorTactic::Never,
+ }
};
let fmt = ListFormatting::new(Shape::legacy(budget, indent), context.config)
.tactic(tactic)
projects / rust.git / blobdiff