let prelude_import_meta = attr::mk_list_word_item(Symbol::intern("prelude_import"));
let list = attr::mk_list_item(Symbol::intern("feature"), vec![prelude_import_meta]);
let fake_attr = attr::mk_attr_inner(attr::mk_attr_id(), list);
- try!(s.print_attribute(&fake_attr));
+ s.print_attribute(&fake_attr)?;
// #![no_std]
let no_std_meta = attr::mk_word_item(Symbol::intern("no_std"));
let fake_attr = attr::mk_attr_inner(attr::mk_attr_id(), no_std_meta);
- try!(s.print_attribute(&fake_attr));
+ s.print_attribute(&fake_attr)?;
}
- try!(s.print_mod(&krate.module, &krate.attrs));
- try!(s.print_remaining_comments());
+ s.print_mod(&krate.module, &krate.attrs)?;
+ s.print_remaining_comments()?;
eof(&mut s.s)
}
generics: &ast::Generics)
-> String {
to_string(|s| {
- try!(s.head(""));
- try!(s.print_fn(decl, unsafety, constness, Abi::Rust, Some(name),
- generics, &ast::Visibility::Inherited));
- try!(s.end()); // Close the head box
+ s.head("")?;
+ s.print_fn(decl, unsafety, constness, Abi::Rust, Some(name),
+ generics, &ast::Visibility::Inherited)?;
+ s.end()?; // Close the head box
s.end() // Close the outer box
})
}
pub fn block_to_string(blk: &ast::Block) -> String {
to_string(|s| {
// containing cbox, will be closed by print-block at }
- try!(s.cbox(INDENT_UNIT));
+ s.cbox(INDENT_UNIT)?;
// head-ibox, will be closed by print-block after {
- try!(s.ibox(0));
+ s.ibox(0)?;
s.print_block(blk)
})
}
fn literals(&self) -> &Option<Vec<comments::Literal>>;
fn word_space(&mut self, w: &str) -> io::Result<()> {
- try!(word(self.writer(), w));
+ word(self.writer(), w)?;
space(self.writer())
}
fn hardbreak_if_not_bol(&mut self) -> io::Result<()> {
if !self.is_bol() {
- try!(hardbreak(self.writer()))
+ hardbreak(self.writer())?
}
Ok(())
}
fn commasep<T, F>(&mut self, b: Breaks, elts: &[T], mut op: F) -> io::Result<()>
where F: FnMut(&mut Self, &T) -> io::Result<()>,
{
- try!(self.rbox(0, b));
+ self.rbox(0, b)?;
let mut first = true;
for elt in elts {
- if first { first = false; } else { try!(self.word_space(",")); }
- try!(op(self, elt));
+ if first { first = false; } else { self.word_space(",")?; }
+ op(self, elt)?;
}
self.end()
}
fn maybe_print_comment(&mut self, pos: BytePos) -> io::Result<()> {
while let Some(ref cmnt) = self.next_comment() {
if cmnt.pos < pos {
- try!(self.print_comment(cmnt));
+ self.print_comment(cmnt)?;
self.cur_cmnt_and_lit().cur_cmnt += 1;
} else {
break
match cmnt.style {
comments::Mixed => {
assert_eq!(cmnt.lines.len(), 1);
- try!(zerobreak(self.writer()));
- try!(word(self.writer(), &cmnt.lines[0]));
+ zerobreak(self.writer())?;
+ word(self.writer(), &cmnt.lines[0])?;
zerobreak(self.writer())
}
comments::Isolated => {
- try!(self.hardbreak_if_not_bol());
+ self.hardbreak_if_not_bol()?;
for line in &cmnt.lines {
// Don't print empty lines because they will end up as trailing
// whitespace
if !line.is_empty() {
- try!(word(self.writer(), &line[..]));
+ word(self.writer(), &line[..])?;
}
- try!(hardbreak(self.writer()));
+ hardbreak(self.writer())?;
}
Ok(())
}
comments::Trailing => {
if !self.is_bol() {
- try!(word(self.writer(), " "));
+ word(self.writer(), " ")?;
}
if cmnt.lines.len() == 1 {
- try!(word(self.writer(), &cmnt.lines[0]));
+ word(self.writer(), &cmnt.lines[0])?;
hardbreak(self.writer())
} else {
- try!(self.ibox(0));
+ self.ibox(0)?;
for line in &cmnt.lines {
if !line.is_empty() {
- try!(word(self.writer(), &line[..]));
+ word(self.writer(), &line[..])?;
}
- try!(hardbreak(self.writer()));
+ hardbreak(self.writer())?;
}
self.end()
}
_ => false
};
if is_semi || self.is_begin() || self.is_end() {
- try!(hardbreak(self.writer()));
+ hardbreak(self.writer())?;
}
hardbreak(self.writer())
}
}
fn print_literal(&mut self, lit: &ast::Lit) -> io::Result<()> {
- try!(self.maybe_print_comment(lit.span.lo));
+ self.maybe_print_comment(lit.span.lo)?;
match self.next_lit(lit.span.lo) {
Some(ref ltrl) => {
return word(self.writer(), &(*ltrl).lit);
let mut count = 0;
for attr in attrs {
if attr.style == kind {
- try!(self.print_attribute_inline(attr, is_inline));
+ self.print_attribute_inline(attr, is_inline)?;
if is_inline {
- try!(self.nbsp());
+ self.nbsp()?;
}
count += 1;
}
}
if count > 0 && trailing_hardbreak && !is_inline {
- try!(self.hardbreak_if_not_bol());
+ self.hardbreak_if_not_bol()?;
}
Ok(())
}
fn print_attribute_inline(&mut self, attr: &ast::Attribute,
is_inline: bool) -> io::Result<()> {
if !is_inline {
- try!(self.hardbreak_if_not_bol());
+ self.hardbreak_if_not_bol()?;
}
- try!(self.maybe_print_comment(attr.span.lo));
+ self.maybe_print_comment(attr.span.lo)?;
if attr.is_sugared_doc {
- try!(word(self.writer(), &attr.value_str().unwrap().as_str()));
+ word(self.writer(), &attr.value_str().unwrap().as_str())?;
hardbreak(self.writer())
} else {
match attr.style {
- ast::AttrStyle::Inner => try!(word(self.writer(), "#![")),
- ast::AttrStyle::Outer => try!(word(self.writer(), "#[")),
+ ast::AttrStyle::Inner => word(self.writer(), "#![")?,
+ ast::AttrStyle::Outer => word(self.writer(), "#[")?,
}
- try!(self.print_meta_item(&attr.meta()));
+ self.print_meta_item(&attr.meta())?;
word(self.writer(), "]")
}
}
}
fn print_meta_item(&mut self, item: &ast::MetaItem) -> io::Result<()> {
- try!(self.ibox(INDENT_UNIT));
+ self.ibox(INDENT_UNIT)?;
match item.node {
ast::MetaItemKind::Word => {
- try!(word(self.writer(), &item.name.as_str()));
+ word(self.writer(), &item.name.as_str())?;
}
ast::MetaItemKind::NameValue(ref value) => {
- try!(self.word_space(&item.name.as_str()));
- try!(self.word_space("="));
- try!(self.print_literal(value));
+ self.word_space(&item.name.as_str())?;
+ self.word_space("=")?;
+ self.print_literal(value)?;
}
ast::MetaItemKind::List(ref items) => {
- try!(word(self.writer(), &item.name.as_str()));
- try!(self.popen());
- try!(self.commasep(Consistent,
+ word(self.writer(), &item.name.as_str())?;
+ self.popen()?;
+ self.commasep(Consistent,
&items[..],
- |s, i| s.print_meta_list_item(&i)));
- try!(self.pclose());
+ |s, i| s.print_meta_list_item(&i))?;
+ self.pclose()?;
}
}
self.end()
}
fn space_if_not_bol(&mut self) -> io::Result<()> {
- if !self.is_bol() { try!(space(self.writer())); }
+ if !self.is_bol() { space(self.writer())?; }
Ok(())
}
}
pub fn word_nbsp(&mut self, w: &str) -> io::Result<()> {
- try!(word(&mut self.s, w));
+ word(&mut self.s, w)?;
self.nbsp()
}
pub fn head(&mut self, w: &str) -> io::Result<()> {
// outer-box is consistent
- try!(self.cbox(INDENT_UNIT));
+ self.cbox(INDENT_UNIT)?;
// head-box is inconsistent
- try!(self.ibox(w.len() + 1));
+ self.ibox(w.len() + 1)?;
// keyword that starts the head
if !w.is_empty() {
- try!(self.word_nbsp(w));
+ self.word_nbsp(w)?;
}
Ok(())
}
pub fn bopen(&mut self) -> io::Result<()> {
- try!(word(&mut self.s, "{"));
+ word(&mut self.s, "{")?;
self.end() // close the head-box
}
}
pub fn bclose_maybe_open(&mut self, span: syntax_pos::Span,
indented: usize, close_box: bool) -> io::Result<()> {
- try!(self.maybe_print_comment(span.hi));
- try!(self.break_offset_if_not_bol(1, -(indented as isize)));
- try!(word(&mut self.s, "}"));
+ self.maybe_print_comment(span.hi)?;
+ self.break_offset_if_not_bol(1, -(indented as isize))?;
+ word(&mut self.s, "}")?;
if close_box {
- try!(self.end()); // close the outer-box
+ self.end()?; // close the outer-box
}
Ok(())
}
// Synthesizes a comment that was not textually present in the original source
// file.
pub fn synth_comment(&mut self, text: String) -> io::Result<()> {
- try!(word(&mut self.s, "/*"));
- try!(space(&mut self.s));
- try!(word(&mut self.s, &text[..]));
- try!(space(&mut self.s));
+ word(&mut self.s, "/*")?;
+ space(&mut self.s)?;
+ word(&mut self.s, &text[..])?;
+ space(&mut self.s)?;
word(&mut self.s, "*/")
}
F: FnMut(&mut State, &T) -> io::Result<()>,
G: FnMut(&T) -> syntax_pos::Span,
{
- try!(self.rbox(0, b));
+ self.rbox(0, b)?;
let len = elts.len();
let mut i = 0;
for elt in elts {
- try!(self.maybe_print_comment(get_span(elt).hi));
- try!(op(self, elt));
+ self.maybe_print_comment(get_span(elt).hi)?;
+ op(self, elt)?;
i += 1;
if i < len {
- try!(word(&mut self.s, ","));
- try!(self.maybe_print_trailing_comment(get_span(elt),
- Some(get_span(&elts[i]).hi)));
- try!(self.space_if_not_bol());
+ word(&mut self.s, ",")?;
+ self.maybe_print_trailing_comment(get_span(elt),
+ Some(get_span(&elts[i]).hi))?;
+ self.space_if_not_bol()?;
}
}
self.end()
pub fn print_mod(&mut self, _mod: &ast::Mod,
attrs: &[ast::Attribute]) -> io::Result<()> {
- try!(self.print_inner_attributes(attrs));
+ self.print_inner_attributes(attrs)?;
for item in &_mod.items {
- try!(self.print_item(&item));
+ self.print_item(&item)?;
}
Ok(())
}
pub fn print_foreign_mod(&mut self, nmod: &ast::ForeignMod,
attrs: &[ast::Attribute]) -> io::Result<()> {
- try!(self.print_inner_attributes(attrs));
+ self.print_inner_attributes(attrs)?;
for item in &nmod.items {
- try!(self.print_foreign_item(item));
+ self.print_foreign_item(item)?;
}
Ok(())
}
pub fn print_opt_lifetime(&mut self,
lifetime: &Option<ast::Lifetime>) -> io::Result<()> {
if let Some(l) = *lifetime {
- try!(self.print_lifetime(&l));
- try!(self.nbsp());
+ self.print_lifetime(&l)?;
+ self.nbsp()?;
}
Ok(())
}
pub fn print_type(&mut self, ty: &ast::Ty) -> io::Result<()> {
- try!(self.maybe_print_comment(ty.span.lo));
- try!(self.ibox(0));
+ self.maybe_print_comment(ty.span.lo)?;
+ self.ibox(0)?;
match ty.node {
ast::TyKind::Slice(ref ty) => {
- try!(word(&mut self.s, "["));
- try!(self.print_type(&ty));
- try!(word(&mut self.s, "]"));
+ word(&mut self.s, "[")?;
+ self.print_type(&ty)?;
+ word(&mut self.s, "]")?;
}
ast::TyKind::Ptr(ref mt) => {
- try!(word(&mut self.s, "*"));
+ word(&mut self.s, "*")?;
match mt.mutbl {
- ast::Mutability::Mutable => try!(self.word_nbsp("mut")),
- ast::Mutability::Immutable => try!(self.word_nbsp("const")),
+ ast::Mutability::Mutable => self.word_nbsp("mut")?,
+ ast::Mutability::Immutable => self.word_nbsp("const")?,
}
- try!(self.print_type(&mt.ty));
+ self.print_type(&mt.ty)?;
}
ast::TyKind::Rptr(ref lifetime, ref mt) => {
- try!(word(&mut self.s, "&"));
- try!(self.print_opt_lifetime(lifetime));
- try!(self.print_mt(mt));
+ word(&mut self.s, "&")?;
+ self.print_opt_lifetime(lifetime)?;
+ self.print_mt(mt)?;
}
ast::TyKind::Never => {
- try!(word(&mut self.s, "!"));
+ word(&mut self.s, "!")?;
},
ast::TyKind::Tup(ref elts) => {
- try!(self.popen());
- try!(self.commasep(Inconsistent, &elts[..],
- |s, ty| s.print_type(&ty)));
+ self.popen()?;
+ self.commasep(Inconsistent, &elts[..],
+ |s, ty| s.print_type(&ty))?;
if elts.len() == 1 {
- try!(word(&mut self.s, ","));
+ word(&mut self.s, ",")?;
}
- try!(self.pclose());
+ self.pclose()?;
}
ast::TyKind::Paren(ref typ) => {
- try!(self.popen());
- try!(self.print_type(&typ));
- try!(self.pclose());
+ self.popen()?;
+ self.print_type(&typ)?;
+ self.pclose()?;
}
ast::TyKind::BareFn(ref f) => {
let generics = ast::Generics {
},
span: syntax_pos::DUMMY_SP,
};
- try!(self.print_ty_fn(f.abi,
+ self.print_ty_fn(f.abi,
f.unsafety,
&f.decl,
None,
- &generics));
+ &generics)?;
}
ast::TyKind::Path(None, ref path) => {
- try!(self.print_path(path, false, 0, false));
+ self.print_path(path, false, 0, false)?;
}
ast::TyKind::Path(Some(ref qself), ref path) => {
- try!(self.print_qpath(path, qself, false))
+ self.print_qpath(path, qself, false)?
}
ast::TyKind::ObjectSum(ref ty, ref bounds) => {
- try!(self.print_type(&ty));
- try!(self.print_bounds("+", &bounds[..]));
+ self.print_type(&ty)?;
+ self.print_bounds("+", &bounds[..])?;
}
ast::TyKind::PolyTraitRef(ref bounds) => {
- try!(self.print_bounds("", &bounds[..]));
+ self.print_bounds("", &bounds[..])?;
}
ast::TyKind::ImplTrait(ref bounds) => {
- try!(self.print_bounds("impl ", &bounds[..]));
+ self.print_bounds("impl ", &bounds[..])?;
}
ast::TyKind::Array(ref ty, ref v) => {
- try!(word(&mut self.s, "["));
- try!(self.print_type(&ty));
- try!(word(&mut self.s, "; "));
- try!(self.print_expr(&v));
- try!(word(&mut self.s, "]"));
+ word(&mut self.s, "[")?;
+ self.print_type(&ty)?;
+ word(&mut self.s, "; ")?;
+ self.print_expr(&v)?;
+ word(&mut self.s, "]")?;
}
ast::TyKind::Typeof(ref e) => {
- try!(word(&mut self.s, "typeof("));
- try!(self.print_expr(&e));
- try!(word(&mut self.s, ")"));
+ word(&mut self.s, "typeof(")?;
+ self.print_expr(&e)?;
+ word(&mut self.s, ")")?;
}
ast::TyKind::Infer => {
- try!(word(&mut self.s, "_"));
+ word(&mut self.s, "_")?;
}
ast::TyKind::ImplicitSelf => {
- try!(word(&mut self.s, "Self"));
+ word(&mut self.s, "Self")?;
}
ast::TyKind::Mac(ref m) => {
- try!(self.print_mac(m, token::Paren));
+ self.print_mac(m, token::Paren)?;
}
}
self.end()
pub fn print_foreign_item(&mut self,
item: &ast::ForeignItem) -> io::Result<()> {
- try!(self.hardbreak_if_not_bol());
- try!(self.maybe_print_comment(item.span.lo));
- try!(self.print_outer_attributes(&item.attrs));
+ self.hardbreak_if_not_bol()?;
+ self.maybe_print_comment(item.span.lo)?;
+ self.print_outer_attributes(&item.attrs)?;
match item.node {
ast::ForeignItemKind::Fn(ref decl, ref generics) => {
- try!(self.head(""));
- try!(self.print_fn(decl, ast::Unsafety::Normal,
+ self.head("")?;
+ self.print_fn(decl, ast::Unsafety::Normal,
ast::Constness::NotConst,
Abi::Rust, Some(item.ident),
- generics, &item.vis));
- try!(self.end()); // end head-ibox
- try!(word(&mut self.s, ";"));
+ generics, &item.vis)?;
+ self.end()?; // end head-ibox
+ word(&mut self.s, ";")?;
self.end() // end the outer fn box
}
ast::ForeignItemKind::Static(ref t, m) => {
- try!(self.head(&visibility_qualified(&item.vis, "static")));
+ self.head(&visibility_qualified(&item.vis, "static"))?;
if m {
- try!(self.word_space("mut"));
+ self.word_space("mut")?;
}
- try!(self.print_ident(item.ident));
- try!(self.word_space(":"));
- try!(self.print_type(&t));
- try!(word(&mut self.s, ";"));
- try!(self.end()); // end the head-ibox
+ self.print_ident(item.ident)?;
+ self.word_space(":")?;
+ self.print_type(&t)?;
+ word(&mut self.s, ";")?;
+ self.end()?; // end the head-ibox
self.end() // end the outer cbox
}
}
vis: &ast::Visibility)
-> io::Result<()>
{
- try!(word(&mut self.s, &visibility_qualified(vis, "")));
- try!(self.word_space("const"));
- try!(self.print_ident(ident));
- try!(self.word_space(":"));
- try!(self.print_type(ty));
+ word(&mut self.s, &visibility_qualified(vis, ""))?;
+ self.word_space("const")?;
+ self.print_ident(ident)?;
+ self.word_space(":")?;
+ self.print_type(ty)?;
if let Some(expr) = default {
- try!(space(&mut self.s));
- try!(self.word_space("="));
- try!(self.print_expr(expr));
+ space(&mut self.s)?;
+ self.word_space("=")?;
+ self.print_expr(expr)?;
}
word(&mut self.s, ";")
}
bounds: Option<&ast::TyParamBounds>,
ty: Option<&ast::Ty>)
-> io::Result<()> {
- try!(self.word_space("type"));
- try!(self.print_ident(ident));
+ self.word_space("type")?;
+ self.print_ident(ident)?;
if let Some(bounds) = bounds {
- try!(self.print_bounds(":", bounds));
+ self.print_bounds(":", bounds)?;
}
if let Some(ty) = ty {
- try!(space(&mut self.s));
- try!(self.word_space("="));
- try!(self.print_type(ty));
+ space(&mut self.s)?;
+ self.word_space("=")?;
+ self.print_type(ty)?;
}
word(&mut self.s, ";")
}
/// Pretty-print an item
pub fn print_item(&mut self, item: &ast::Item) -> io::Result<()> {
- try!(self.hardbreak_if_not_bol());
- try!(self.maybe_print_comment(item.span.lo));
- try!(self.print_outer_attributes(&item.attrs));
- try!(self.ann.pre(self, NodeItem(item)));
+ self.hardbreak_if_not_bol()?;
+ self.maybe_print_comment(item.span.lo)?;
+ self.print_outer_attributes(&item.attrs)?;
+ self.ann.pre(self, NodeItem(item))?;
match item.node {
ast::ItemKind::ExternCrate(ref optional_path) => {
- try!(self.head(&visibility_qualified(&item.vis, "extern crate")));
+ self.head(&visibility_qualified(&item.vis, "extern crate"))?;
if let Some(p) = *optional_path {
let val = p.as_str();
if val.contains("-") {
- try!(self.print_string(&val, ast::StrStyle::Cooked));
+ self.print_string(&val, ast::StrStyle::Cooked)?;
} else {
- try!(self.print_name(p));
+ self.print_name(p)?;
}
- try!(space(&mut self.s));
- try!(word(&mut self.s, "as"));
- try!(space(&mut self.s));
+ space(&mut self.s)?;
+ word(&mut self.s, "as")?;
+ space(&mut self.s)?;
}
- try!(self.print_ident(item.ident));
- try!(word(&mut self.s, ";"));
- try!(self.end()); // end inner head-block
- try!(self.end()); // end outer head-block
+ self.print_ident(item.ident)?;
+ word(&mut self.s, ";")?;
+ self.end()?; // end inner head-block
+ self.end()?; // end outer head-block
}
ast::ItemKind::Use(ref vp) => {
- try!(self.head(&visibility_qualified(&item.vis, "use")));
- try!(self.print_view_path(&vp));
- try!(word(&mut self.s, ";"));
- try!(self.end()); // end inner head-block
- try!(self.end()); // end outer head-block
+ self.head(&visibility_qualified(&item.vis, "use"))?;
+ self.print_view_path(&vp)?;
+ word(&mut self.s, ";")?;
+ self.end()?; // end inner head-block
+ self.end()?; // end outer head-block
}
ast::ItemKind::Static(ref ty, m, ref expr) => {
- try!(self.head(&visibility_qualified(&item.vis, "static")));
+ self.head(&visibility_qualified(&item.vis, "static"))?;
if m == ast::Mutability::Mutable {
- try!(self.word_space("mut"));
+ self.word_space("mut")?;
}
- try!(self.print_ident(item.ident));
- try!(self.word_space(":"));
- try!(self.print_type(&ty));
- try!(space(&mut self.s));
- try!(self.end()); // end the head-ibox
+ self.print_ident(item.ident)?;
+ self.word_space(":")?;
+ self.print_type(&ty)?;
+ space(&mut self.s)?;
+ self.end()?; // end the head-ibox
- try!(self.word_space("="));
- try!(self.print_expr(&expr));
- try!(word(&mut self.s, ";"));
- try!(self.end()); // end the outer cbox
+ self.word_space("=")?;
+ self.print_expr(&expr)?;
+ word(&mut self.s, ";")?;
+ self.end()?; // end the outer cbox
}
ast::ItemKind::Const(ref ty, ref expr) => {
- try!(self.head(&visibility_qualified(&item.vis, "const")));
- try!(self.print_ident(item.ident));
- try!(self.word_space(":"));
- try!(self.print_type(&ty));
- try!(space(&mut self.s));
- try!(self.end()); // end the head-ibox
-
- try!(self.word_space("="));
- try!(self.print_expr(&expr));
- try!(word(&mut self.s, ";"));
- try!(self.end()); // end the outer cbox
+ self.head(&visibility_qualified(&item.vis, "const"))?;
+ self.print_ident(item.ident)?;
+ self.word_space(":")?;
+ self.print_type(&ty)?;
+ space(&mut self.s)?;
+ self.end()?; // end the head-ibox
+
+ self.word_space("=")?;
+ self.print_expr(&expr)?;
+ word(&mut self.s, ";")?;
+ self.end()?; // end the outer cbox
}
ast::ItemKind::Fn(ref decl, unsafety, constness, abi, ref typarams, ref body) => {
- try!(self.head(""));
- try!(self.print_fn(
+ self.head("")?;
+ self.print_fn(
decl,
unsafety,
constness.node,
Some(item.ident),
typarams,
&item.vis
- ));
- try!(word(&mut self.s, " "));
- try!(self.print_block_with_attrs(&body, &item.attrs));
+ )?;
+ word(&mut self.s, " ")?;
+ self.print_block_with_attrs(&body, &item.attrs)?;
}
ast::ItemKind::Mod(ref _mod) => {
- try!(self.head(&visibility_qualified(&item.vis, "mod")));
- try!(self.print_ident(item.ident));
- try!(self.nbsp());
- try!(self.bopen());
- try!(self.print_mod(_mod, &item.attrs));
- try!(self.bclose(item.span));
+ self.head(&visibility_qualified(&item.vis, "mod"))?;
+ self.print_ident(item.ident)?;
+ self.nbsp()?;
+ self.bopen()?;
+ self.print_mod(_mod, &item.attrs)?;
+ self.bclose(item.span)?;
}
ast::ItemKind::ForeignMod(ref nmod) => {
- try!(self.head("extern"));
- try!(self.word_nbsp(&nmod.abi.to_string()));
- try!(self.bopen());
- try!(self.print_foreign_mod(nmod, &item.attrs));
- try!(self.bclose(item.span));
+ self.head("extern")?;
+ self.word_nbsp(&nmod.abi.to_string())?;
+ self.bopen()?;
+ self.print_foreign_mod(nmod, &item.attrs)?;
+ self.bclose(item.span)?;
}
ast::ItemKind::Ty(ref ty, ref params) => {
- try!(self.ibox(INDENT_UNIT));
- try!(self.ibox(0));
- try!(self.word_nbsp(&visibility_qualified(&item.vis, "type")));
- try!(self.print_ident(item.ident));
- try!(self.print_generics(params));
- try!(self.end()); // end the inner ibox
-
- try!(self.print_where_clause(¶ms.where_clause));
- try!(space(&mut self.s));
- try!(self.word_space("="));
- try!(self.print_type(&ty));
- try!(word(&mut self.s, ";"));
- try!(self.end()); // end the outer ibox
+ self.ibox(INDENT_UNIT)?;
+ self.ibox(0)?;
+ self.word_nbsp(&visibility_qualified(&item.vis, "type"))?;
+ self.print_ident(item.ident)?;
+ self.print_generics(params)?;
+ self.end()?; // end the inner ibox
+
+ self.print_where_clause(¶ms.where_clause)?;
+ space(&mut self.s)?;
+ self.word_space("=")?;
+ self.print_type(&ty)?;
+ word(&mut self.s, ";")?;
+ self.end()?; // end the outer ibox
}
ast::ItemKind::Enum(ref enum_definition, ref params) => {
- try!(self.print_enum_def(
+ self.print_enum_def(
enum_definition,
params,
item.ident,
item.span,
&item.vis
- ));
+ )?;
}
ast::ItemKind::Struct(ref struct_def, ref generics) => {
- try!(self.head(&visibility_qualified(&item.vis, "struct")));
- try!(self.print_struct(&struct_def, generics, item.ident, item.span, true));
+ self.head(&visibility_qualified(&item.vis, "struct"))?;
+ self.print_struct(&struct_def, generics, item.ident, item.span, true)?;
}
ast::ItemKind::Union(ref struct_def, ref generics) => {
- try!(self.head(&visibility_qualified(&item.vis, "union")));
- try!(self.print_struct(&struct_def, generics, item.ident, item.span, true));
+ self.head(&visibility_qualified(&item.vis, "union"))?;
+ self.print_struct(&struct_def, generics, item.ident, item.span, true)?;
}
ast::ItemKind::DefaultImpl(unsafety, ref trait_ref) => {
- try!(self.head(""));
- try!(self.print_visibility(&item.vis));
- try!(self.print_unsafety(unsafety));
- try!(self.word_nbsp("impl"));
- try!(self.print_trait_ref(trait_ref));
- try!(space(&mut self.s));
- try!(self.word_space("for"));
- try!(self.word_space(".."));
- try!(self.bopen());
- try!(self.bclose(item.span));
+ self.head("")?;
+ self.print_visibility(&item.vis)?;
+ self.print_unsafety(unsafety)?;
+ self.word_nbsp("impl")?;
+ self.print_trait_ref(trait_ref)?;
+ space(&mut self.s)?;
+ self.word_space("for")?;
+ self.word_space("..")?;
+ self.bopen()?;
+ self.bclose(item.span)?;
}
ast::ItemKind::Impl(unsafety,
polarity,
ref opt_trait,
ref ty,
ref impl_items) => {
- try!(self.head(""));
- try!(self.print_visibility(&item.vis));
- try!(self.print_unsafety(unsafety));
- try!(self.word_nbsp("impl"));
+ self.head("")?;
+ self.print_visibility(&item.vis)?;
+ self.print_unsafety(unsafety)?;
+ self.word_nbsp("impl")?;
if generics.is_parameterized() {
- try!(self.print_generics(generics));
- try!(space(&mut self.s));
+ self.print_generics(generics)?;
+ space(&mut self.s)?;
}
match polarity {
ast::ImplPolarity::Negative => {
- try!(word(&mut self.s, "!"));
+ word(&mut self.s, "!")?;
},
_ => {}
}
if let Some(ref t) = *opt_trait {
- try!(self.print_trait_ref(t));
- try!(space(&mut self.s));
- try!(self.word_space("for"));
+ self.print_trait_ref(t)?;
+ space(&mut self.s)?;
+ self.word_space("for")?;
}
- try!(self.print_type(&ty));
- try!(self.print_where_clause(&generics.where_clause));
+ self.print_type(&ty)?;
+ self.print_where_clause(&generics.where_clause)?;
- try!(space(&mut self.s));
- try!(self.bopen());
- try!(self.print_inner_attributes(&item.attrs));
+ space(&mut self.s)?;
+ self.bopen()?;
+ self.print_inner_attributes(&item.attrs)?;
for impl_item in impl_items {
- try!(self.print_impl_item(impl_item));
+ self.print_impl_item(impl_item)?;
}
- try!(self.bclose(item.span));
+ self.bclose(item.span)?;
}
ast::ItemKind::Trait(unsafety, ref generics, ref bounds, ref trait_items) => {
- try!(self.head(""));
- try!(self.print_visibility(&item.vis));
- try!(self.print_unsafety(unsafety));
- try!(self.word_nbsp("trait"));
- try!(self.print_ident(item.ident));
- try!(self.print_generics(generics));
+ self.head("")?;
+ self.print_visibility(&item.vis)?;
+ self.print_unsafety(unsafety)?;
+ self.word_nbsp("trait")?;
+ self.print_ident(item.ident)?;
+ self.print_generics(generics)?;
let mut real_bounds = Vec::with_capacity(bounds.len());
for b in bounds.iter() {
if let TraitTyParamBound(ref ptr, ast::TraitBoundModifier::Maybe) = *b {
- try!(space(&mut self.s));
- try!(self.word_space("for ?"));
- try!(self.print_trait_ref(&ptr.trait_ref));
+ space(&mut self.s)?;
+ self.word_space("for ?")?;
+ self.print_trait_ref(&ptr.trait_ref)?;
} else {
real_bounds.push(b.clone());
}
}
- try!(self.print_bounds(":", &real_bounds[..]));
- try!(self.print_where_clause(&generics.where_clause));
- try!(word(&mut self.s, " "));
- try!(self.bopen());
+ self.print_bounds(":", &real_bounds[..])?;
+ self.print_where_clause(&generics.where_clause)?;
+ word(&mut self.s, " ")?;
+ self.bopen()?;
for trait_item in trait_items {
- try!(self.print_trait_item(trait_item));
+ self.print_trait_item(trait_item)?;
}
- try!(self.bclose(item.span));
+ self.bclose(item.span)?;
}
ast::ItemKind::Mac(codemap::Spanned { ref node, .. }) => {
- try!(self.print_visibility(&item.vis));
- try!(self.print_path(&node.path, false, 0, false));
- try!(word(&mut self.s, "! "));
- try!(self.print_ident(item.ident));
- try!(self.cbox(INDENT_UNIT));
- try!(self.popen());
- try!(self.print_tts(&node.tts[..]));
- try!(self.pclose());
- try!(word(&mut self.s, ";"));
- try!(self.end());
+ self.print_visibility(&item.vis)?;
+ self.print_path(&node.path, false, 0, false)?;
+ word(&mut self.s, "! ")?;
+ self.print_ident(item.ident)?;
+ self.cbox(INDENT_UNIT)?;
+ self.popen()?;
+ self.print_tts(&node.tts[..])?;
+ self.pclose()?;
+ word(&mut self.s, ";")?;
+ self.end()?;
}
}
self.ann.post(self, NodeItem(item))
fn print_formal_lifetime_list(&mut self, lifetimes: &[ast::LifetimeDef]) -> io::Result<()> {
if !lifetimes.is_empty() {
- try!(word(&mut self.s, "for<"));
+ word(&mut self.s, "for<")?;
let mut comma = false;
for lifetime_def in lifetimes {
if comma {
- try!(self.word_space(","))
+ self.word_space(",")?
}
- try!(self.print_outer_attributes_inline(&lifetime_def.attrs));
- try!(self.print_lifetime_bounds(&lifetime_def.lifetime, &lifetime_def.bounds));
+ self.print_outer_attributes_inline(&lifetime_def.attrs)?;
+ self.print_lifetime_bounds(&lifetime_def.lifetime, &lifetime_def.bounds)?;
comma = true;
}
- try!(word(&mut self.s, ">"));
+ word(&mut self.s, ">")?;
}
Ok(())
}
fn print_poly_trait_ref(&mut self, t: &ast::PolyTraitRef) -> io::Result<()> {
- try!(self.print_formal_lifetime_list(&t.bound_lifetimes));
+ self.print_formal_lifetime_list(&t.bound_lifetimes)?;
self.print_trait_ref(&t.trait_ref)
}
generics: &ast::Generics, ident: ast::Ident,
span: syntax_pos::Span,
visibility: &ast::Visibility) -> io::Result<()> {
- try!(self.head(&visibility_qualified(visibility, "enum")));
- try!(self.print_ident(ident));
- try!(self.print_generics(generics));
- try!(self.print_where_clause(&generics.where_clause));
- try!(space(&mut self.s));
+ self.head(&visibility_qualified(visibility, "enum"))?;
+ self.print_ident(ident)?;
+ self.print_generics(generics)?;
+ self.print_where_clause(&generics.where_clause)?;
+ space(&mut self.s)?;
self.print_variants(&enum_definition.variants, span)
}
pub fn print_variants(&mut self,
variants: &[ast::Variant],
span: syntax_pos::Span) -> io::Result<()> {
- try!(self.bopen());
+ self.bopen()?;
for v in variants {
- try!(self.space_if_not_bol());
- try!(self.maybe_print_comment(v.span.lo));
- try!(self.print_outer_attributes(&v.node.attrs));
- try!(self.ibox(INDENT_UNIT));
- try!(self.print_variant(v));
- try!(word(&mut self.s, ","));
- try!(self.end());
- try!(self.maybe_print_trailing_comment(v.span, None));
+ self.space_if_not_bol()?;
+ self.maybe_print_comment(v.span.lo)?;
+ self.print_outer_attributes(&v.node.attrs)?;
+ self.ibox(INDENT_UNIT)?;
+ self.print_variant(v)?;
+ word(&mut self.s, ",")?;
+ self.end()?;
+ self.maybe_print_trailing_comment(v.span, None)?;
}
self.bclose(span)
}
ident: ast::Ident,
span: syntax_pos::Span,
print_finalizer: bool) -> io::Result<()> {
- try!(self.print_ident(ident));
- try!(self.print_generics(generics));
+ self.print_ident(ident)?;
+ self.print_generics(generics)?;
if !struct_def.is_struct() {
if struct_def.is_tuple() {
- try!(self.popen());
- try!(self.commasep(
+ self.popen()?;
+ self.commasep(
Inconsistent, struct_def.fields(),
|s, field| {
- try!(s.maybe_print_comment(field.span.lo));
- try!(s.print_outer_attributes(&field.attrs));
- try!(s.print_visibility(&field.vis));
+ s.maybe_print_comment(field.span.lo)?;
+ s.print_outer_attributes(&field.attrs)?;
+ s.print_visibility(&field.vis)?;
s.print_type(&field.ty)
}
- ));
- try!(self.pclose());
+ )?;
+ self.pclose()?;
}
- try!(self.print_where_clause(&generics.where_clause));
+ self.print_where_clause(&generics.where_clause)?;
if print_finalizer {
- try!(word(&mut self.s, ";"));
+ word(&mut self.s, ";")?;
}
- try!(self.end());
+ self.end()?;
self.end() // close the outer-box
} else {
- try!(self.print_where_clause(&generics.where_clause));
- try!(self.nbsp());
- try!(self.bopen());
- try!(self.hardbreak_if_not_bol());
+ self.print_where_clause(&generics.where_clause)?;
+ self.nbsp()?;
+ self.bopen()?;
+ self.hardbreak_if_not_bol()?;
for field in struct_def.fields() {
- try!(self.hardbreak_if_not_bol());
- try!(self.maybe_print_comment(field.span.lo));
- try!(self.print_outer_attributes(&field.attrs));
- try!(self.print_visibility(&field.vis));
- try!(self.print_ident(field.ident.unwrap()));
- try!(self.word_nbsp(":"));
- try!(self.print_type(&field.ty));
- try!(word(&mut self.s, ","));
+ self.hardbreak_if_not_bol()?;
+ self.maybe_print_comment(field.span.lo)?;
+ self.print_outer_attributes(&field.attrs)?;
+ self.print_visibility(&field.vis)?;
+ self.print_ident(field.ident.unwrap())?;
+ self.word_nbsp(":")?;
+ self.print_type(&field.ty)?;
+ word(&mut self.s, ",")?;
}
self.bclose(span)
pub fn print_tt(&mut self, tt: &tokenstream::TokenTree) -> io::Result<()> {
match *tt {
TokenTree::Token(_, ref tk) => {
- try!(word(&mut self.s, &token_to_string(tk)));
+ word(&mut self.s, &token_to_string(tk))?;
match *tk {
parse::token::DocComment(..) => {
hardbreak(&mut self.s)
}
}
TokenTree::Delimited(_, ref delimed) => {
- try!(word(&mut self.s, &token_to_string(&delimed.open_token())));
- try!(space(&mut self.s));
- try!(self.print_tts(&delimed.tts));
- try!(space(&mut self.s));
+ word(&mut self.s, &token_to_string(&delimed.open_token()))?;
+ space(&mut self.s)?;
+ self.print_tts(&delimed.tts)?;
+ space(&mut self.s)?;
word(&mut self.s, &token_to_string(&delimed.close_token()))
},
TokenTree::Sequence(_, ref seq) => {
- try!(word(&mut self.s, "$("));
+ word(&mut self.s, "$(")?;
for tt_elt in &seq.tts {
- try!(self.print_tt(tt_elt));
+ self.print_tt(tt_elt)?;
}
- try!(word(&mut self.s, ")"));
+ word(&mut self.s, ")")?;
if let Some(ref tk) = seq.separator {
- try!(word(&mut self.s, &token_to_string(tk)));
+ word(&mut self.s, &token_to_string(tk))?;
}
match seq.op {
tokenstream::KleeneOp::ZeroOrMore => word(&mut self.s, "*"),
}
pub fn print_tts(&mut self, tts: &[tokenstream::TokenTree]) -> io::Result<()> {
- try!(self.ibox(0));
+ self.ibox(0)?;
for (i, tt) in tts.iter().enumerate() {
if i != 0 {
- try!(space(&mut self.s));
+ space(&mut self.s)?;
}
- try!(self.print_tt(tt));
+ self.print_tt(tt)?;
}
self.end()
}
pub fn print_variant(&mut self, v: &ast::Variant) -> io::Result<()> {
- try!(self.head(""));
+ self.head("")?;
let generics = ast::Generics::default();
- try!(self.print_struct(&v.node.data, &generics, v.node.name, v.span, false));
+ self.print_struct(&v.node.data, &generics, v.node.name, v.span, false)?;
match v.node.disr_expr {
Some(ref d) => {
- try!(space(&mut self.s));
- try!(self.word_space("="));
+ space(&mut self.s)?;
+ self.word_space("=")?;
self.print_expr(&d)
}
_ => Ok(())
pub fn print_trait_item(&mut self, ti: &ast::TraitItem)
-> io::Result<()> {
- try!(self.ann.pre(self, NodeSubItem(ti.id)));
- try!(self.hardbreak_if_not_bol());
- try!(self.maybe_print_comment(ti.span.lo));
- try!(self.print_outer_attributes(&ti.attrs));
+ self.ann.pre(self, NodeSubItem(ti.id))?;
+ self.hardbreak_if_not_bol()?;
+ self.maybe_print_comment(ti.span.lo)?;
+ self.print_outer_attributes(&ti.attrs)?;
match ti.node {
ast::TraitItemKind::Const(ref ty, ref default) => {
- try!(self.print_associated_const(ti.ident, &ty,
+ self.print_associated_const(ti.ident, &ty,
default.as_ref().map(|expr| &**expr),
- &ast::Visibility::Inherited));
+ &ast::Visibility::Inherited)?;
}
ast::TraitItemKind::Method(ref sig, ref body) => {
if body.is_some() {
- try!(self.head(""));
+ self.head("")?;
}
- try!(self.print_method_sig(ti.ident, sig, &ast::Visibility::Inherited));
+ self.print_method_sig(ti.ident, sig, &ast::Visibility::Inherited)?;
if let Some(ref body) = *body {
- try!(self.nbsp());
- try!(self.print_block_with_attrs(body, &ti.attrs));
+ self.nbsp()?;
+ self.print_block_with_attrs(body, &ti.attrs)?;
} else {
- try!(word(&mut self.s, ";"));
+ word(&mut self.s, ";")?;
}
}
ast::TraitItemKind::Type(ref bounds, ref default) => {
- try!(self.print_associated_type(ti.ident, Some(bounds),
- default.as_ref().map(|ty| &**ty)));
+ self.print_associated_type(ti.ident, Some(bounds),
+ default.as_ref().map(|ty| &**ty))?;
}
ast::TraitItemKind::Macro(codemap::Spanned { ref node, .. }) => {
// code copied from ItemKind::Mac:
}
pub fn print_impl_item(&mut self, ii: &ast::ImplItem) -> io::Result<()> {
- try!(self.ann.pre(self, NodeSubItem(ii.id)));
- try!(self.hardbreak_if_not_bol());
- try!(self.maybe_print_comment(ii.span.lo));
- try!(self.print_outer_attributes(&ii.attrs));
+ self.ann.pre(self, NodeSubItem(ii.id))?;
+ self.hardbreak_if_not_bol()?;
+ self.maybe_print_comment(ii.span.lo)?;
+ self.print_outer_attributes(&ii.attrs)?;
if let ast::Defaultness::Default = ii.defaultness {
- try!(self.word_nbsp("default"));
+ self.word_nbsp("default")?;
}
match ii.node {
ast::ImplItemKind::Const(ref ty, ref expr) => {
- try!(self.print_associated_const(ii.ident, &ty, Some(&expr), &ii.vis));
+ self.print_associated_const(ii.ident, &ty, Some(&expr), &ii.vis)?;
}
ast::ImplItemKind::Method(ref sig, ref body) => {
- try!(self.head(""));
- try!(self.print_method_sig(ii.ident, sig, &ii.vis));
- try!(self.nbsp());
- try!(self.print_block_with_attrs(body, &ii.attrs));
+ self.head("")?;
+ self.print_method_sig(ii.ident, sig, &ii.vis)?;
+ self.nbsp()?;
+ self.print_block_with_attrs(body, &ii.attrs)?;
}
ast::ImplItemKind::Type(ref ty) => {
- try!(self.print_associated_type(ii.ident, None, Some(ty)));
+ self.print_associated_type(ii.ident, None, Some(ty))?;
}
ast::ImplItemKind::Macro(codemap::Spanned { ref node, .. }) => {
// code copied from ItemKind::Mac:
- try!(self.print_path(&node.path, false, 0, false));
- try!(word(&mut self.s, "! "));
- try!(self.cbox(INDENT_UNIT));
- try!(self.popen());
- try!(self.print_tts(&node.tts[..]));
- try!(self.pclose());
- try!(word(&mut self.s, ";"));
- try!(self.end())
+ self.print_path(&node.path, false, 0, false)?;
+ word(&mut self.s, "! ")?;
+ self.cbox(INDENT_UNIT)?;
+ self.popen()?;
+ self.print_tts(&node.tts[..])?;
+ self.pclose()?;
+ word(&mut self.s, ";")?;
+ self.end()?
}
}
self.ann.post(self, NodeSubItem(ii.id))
}
pub fn print_stmt(&mut self, st: &ast::Stmt) -> io::Result<()> {
- try!(self.maybe_print_comment(st.span.lo));
+ self.maybe_print_comment(st.span.lo)?;
match st.node {
ast::StmtKind::Local(ref loc) => {
- try!(self.print_outer_attributes(&loc.attrs));
- try!(self.space_if_not_bol());
- try!(self.ibox(INDENT_UNIT));
- try!(self.word_nbsp("let"));
-
- try!(self.ibox(INDENT_UNIT));
- try!(self.print_local_decl(&loc));
- try!(self.end());
+ self.print_outer_attributes(&loc.attrs)?;
+ self.space_if_not_bol()?;
+ self.ibox(INDENT_UNIT)?;
+ self.word_nbsp("let")?;
+
+ self.ibox(INDENT_UNIT)?;
+ self.print_local_decl(&loc)?;
+ self.end()?;
if let Some(ref init) = loc.init {
- try!(self.nbsp());
- try!(self.word_space("="));
- try!(self.print_expr(&init));
+ self.nbsp()?;
+ self.word_space("=")?;
+ self.print_expr(&init)?;
}
- try!(word(&mut self.s, ";"));
+ word(&mut self.s, ";")?;
self.end()?;
}
ast::StmtKind::Item(ref item) => self.print_item(&item)?,
ast::StmtKind::Expr(ref expr) => {
- try!(self.space_if_not_bol());
- try!(self.print_expr_outer_attr_style(&expr, false));
+ self.space_if_not_bol()?;
+ self.print_expr_outer_attr_style(&expr, false)?;
if parse::classify::expr_requires_semi_to_be_stmt(expr) {
- try!(word(&mut self.s, ";"));
+ word(&mut self.s, ";")?;
}
}
ast::StmtKind::Semi(ref expr) => {
- try!(self.space_if_not_bol());
- try!(self.print_expr_outer_attr_style(&expr, false));
- try!(word(&mut self.s, ";"));
+ self.space_if_not_bol()?;
+ self.print_expr_outer_attr_style(&expr, false)?;
+ word(&mut self.s, ";")?;
}
ast::StmtKind::Mac(ref mac) => {
let (ref mac, style, ref attrs) = **mac;
- try!(self.space_if_not_bol());
- try!(self.print_outer_attributes(&attrs));
+ self.space_if_not_bol()?;
+ self.print_outer_attributes(&attrs)?;
let delim = match style {
ast::MacStmtStyle::Braces => token::Brace,
_ => token::Paren
};
- try!(self.print_mac(&mac, delim));
+ self.print_mac(&mac, delim)?;
if style == ast::MacStmtStyle::Semicolon {
- try!(word(&mut self.s, ";"));
+ word(&mut self.s, ";")?;
}
}
}
attrs: &[ast::Attribute],
close_box: bool) -> io::Result<()> {
match blk.rules {
- BlockCheckMode::Unsafe(..) => try!(self.word_space("unsafe")),
+ BlockCheckMode::Unsafe(..) => self.word_space("unsafe")?,
BlockCheckMode::Default => ()
}
- try!(self.maybe_print_comment(blk.span.lo));
- try!(self.ann.pre(self, NodeBlock(blk)));
- try!(self.bopen());
+ self.maybe_print_comment(blk.span.lo)?;
+ self.ann.pre(self, NodeBlock(blk))?;
+ self.bopen()?;
- try!(self.print_inner_attributes(attrs));
+ self.print_inner_attributes(attrs)?;
for (i, st) in blk.stmts.iter().enumerate() {
match st.node {
ast::StmtKind::Expr(ref expr) if i == blk.stmts.len() - 1 => {
- try!(self.maybe_print_comment(st.span.lo));
- try!(self.space_if_not_bol());
- try!(self.print_expr_outer_attr_style(&expr, false));
- try!(self.maybe_print_trailing_comment(expr.span, Some(blk.span.hi)));
+ self.maybe_print_comment(st.span.lo)?;
+ self.space_if_not_bol()?;
+ self.print_expr_outer_attr_style(&expr, false)?;
+ self.maybe_print_trailing_comment(expr.span, Some(blk.span.hi))?;
}
- _ => try!(self.print_stmt(st)),
+ _ => self.print_stmt(st)?,
}
}
- try!(self.bclose_maybe_open(blk.span, indented, close_box));
+ self.bclose_maybe_open(blk.span, indented, close_box)?;
self.ann.post(self, NodeBlock(blk))
}
match _else.node {
// "another else-if"
ast::ExprKind::If(ref i, ref then, ref e) => {
- try!(self.cbox(INDENT_UNIT - 1));
- try!(self.ibox(0));
- try!(word(&mut self.s, " else if "));
- try!(self.print_expr(&i));
- try!(space(&mut self.s));
- try!(self.print_block(&then));
+ self.cbox(INDENT_UNIT - 1)?;
+ self.ibox(0)?;
+ word(&mut self.s, " else if ")?;
+ self.print_expr(&i)?;
+ space(&mut self.s)?;
+ self.print_block(&then)?;
self.print_else(e.as_ref().map(|e| &**e))
}
// "another else-if-let"
ast::ExprKind::IfLet(ref pat, ref expr, ref then, ref e) => {
- try!(self.cbox(INDENT_UNIT - 1));
- try!(self.ibox(0));
- try!(word(&mut self.s, " else if let "));
- try!(self.print_pat(&pat));
- try!(space(&mut self.s));
- try!(self.word_space("="));
- try!(self.print_expr(&expr));
- try!(space(&mut self.s));
- try!(self.print_block(&then));
+ self.cbox(INDENT_UNIT - 1)?;
+ self.ibox(0)?;
+ word(&mut self.s, " else if let ")?;
+ self.print_pat(&pat)?;
+ space(&mut self.s)?;
+ self.word_space("=")?;
+ self.print_expr(&expr)?;
+ space(&mut self.s)?;
+ self.print_block(&then)?;
self.print_else(e.as_ref().map(|e| &**e))
}
// "final else"
ast::ExprKind::Block(ref b) => {
- try!(self.cbox(INDENT_UNIT - 1));
- try!(self.ibox(0));
- try!(word(&mut self.s, " else "));
+ self.cbox(INDENT_UNIT - 1)?;
+ self.ibox(0)?;
+ word(&mut self.s, " else ")?;
self.print_block(&b)
}
// BLEAH, constraints would be great here
pub fn print_if(&mut self, test: &ast::Expr, blk: &ast::Block,
elseopt: Option<&ast::Expr>) -> io::Result<()> {
- try!(self.head("if"));
- try!(self.print_expr(test));
- try!(space(&mut self.s));
- try!(self.print_block(blk));
+ self.head("if")?;
+ self.print_expr(test)?;
+ space(&mut self.s)?;
+ self.print_block(blk)?;
self.print_else(elseopt)
}
pub fn print_if_let(&mut self, pat: &ast::Pat, expr: &ast::Expr, blk: &ast::Block,
elseopt: Option<&ast::Expr>) -> io::Result<()> {
- try!(self.head("if let"));
- try!(self.print_pat(pat));
- try!(space(&mut self.s));
- try!(self.word_space("="));
- try!(self.print_expr(expr));
- try!(space(&mut self.s));
- try!(self.print_block(blk));
+ self.head("if let")?;
+ self.print_pat(pat)?;
+ space(&mut self.s)?;
+ self.word_space("=")?;
+ self.print_expr(expr)?;
+ space(&mut self.s)?;
+ self.print_block(blk)?;
self.print_else(elseopt)
}
pub fn print_mac(&mut self, m: &ast::Mac, delim: token::DelimToken)
-> io::Result<()> {
- try!(self.print_path(&m.node.path, false, 0, false));
- try!(word(&mut self.s, "!"));
+ self.print_path(&m.node.path, false, 0, false)?;
+ word(&mut self.s, "!")?;
match delim {
- token::Paren => try!(self.popen()),
- token::Bracket => try!(word(&mut self.s, "[")),
+ token::Paren => self.popen()?,
+ token::Bracket => word(&mut self.s, "[")?,
token::Brace => {
- try!(self.head(""));
- try!(self.bopen());
+ self.head("")?;
+ self.bopen()?;
}
token::NoDelim => {}
}
- try!(self.print_tts(&m.node.tts));
+ self.print_tts(&m.node.tts)?;
match delim {
token::Paren => self.pclose(),
token::Bracket => word(&mut self.s, "]"),
fn print_call_post(&mut self, args: &[P<ast::Expr>]) -> io::Result<()> {
- try!(self.popen());
- try!(self.commasep_exprs(Inconsistent, args));
+ self.popen()?;
+ self.commasep_exprs(Inconsistent, args)?;
self.pclose()
}
pub fn print_expr_maybe_paren(&mut self, expr: &ast::Expr) -> io::Result<()> {
let needs_par = needs_parentheses(expr);
if needs_par {
- try!(self.popen());
+ self.popen()?;
}
- try!(self.print_expr(expr));
+ self.print_expr(expr)?;
if needs_par {
- try!(self.pclose());
+ self.pclose()?;
}
Ok(())
}
fn print_expr_in_place(&mut self,
place: &ast::Expr,
expr: &ast::Expr) -> io::Result<()> {
- try!(self.print_expr_maybe_paren(place));
- try!(space(&mut self.s));
- try!(self.word_space("<-"));
+ self.print_expr_maybe_paren(place)?;
+ space(&mut self.s)?;
+ self.word_space("<-")?;
self.print_expr_maybe_paren(expr)
}
fn print_expr_vec(&mut self, exprs: &[P<ast::Expr>],
attrs: &[Attribute]) -> io::Result<()> {
- try!(self.ibox(INDENT_UNIT));
- try!(word(&mut self.s, "["));
- try!(self.print_inner_attributes_inline(attrs));
- try!(self.commasep_exprs(Inconsistent, &exprs[..]));
- try!(word(&mut self.s, "]"));
+ self.ibox(INDENT_UNIT)?;
+ word(&mut self.s, "[")?;
+ self.print_inner_attributes_inline(attrs)?;
+ self.commasep_exprs(Inconsistent, &exprs[..])?;
+ word(&mut self.s, "]")?;
self.end()
}
element: &ast::Expr,
count: &ast::Expr,
attrs: &[Attribute]) -> io::Result<()> {
- try!(self.ibox(INDENT_UNIT));
- try!(word(&mut self.s, "["));
- try!(self.print_inner_attributes_inline(attrs));
- try!(self.print_expr(element));
- try!(self.word_space(";"));
- try!(self.print_expr(count));
- try!(word(&mut self.s, "]"));
+ self.ibox(INDENT_UNIT)?;
+ word(&mut self.s, "[")?;
+ self.print_inner_attributes_inline(attrs)?;
+ self.print_expr(element)?;
+ self.word_space(";")?;
+ self.print_expr(count)?;
+ word(&mut self.s, "]")?;
self.end()
}
fields: &[ast::Field],
wth: &Option<P<ast::Expr>>,
attrs: &[Attribute]) -> io::Result<()> {
- try!(self.print_path(path, true, 0, false));
- try!(word(&mut self.s, "{"));
- try!(self.print_inner_attributes_inline(attrs));
- try!(self.commasep_cmnt(
+ self.print_path(path, true, 0, false)?;
+ word(&mut self.s, "{")?;
+ self.print_inner_attributes_inline(attrs)?;
+ self.commasep_cmnt(
Consistent,
&fields[..],
|s, field| {
- try!(s.ibox(INDENT_UNIT));
+ s.ibox(INDENT_UNIT)?;
if !field.is_shorthand {
- try!(s.print_ident(field.ident.node));
- try!(s.word_space(":"));
+ s.print_ident(field.ident.node)?;
+ s.word_space(":")?;
}
- try!(s.print_expr(&field.expr));
+ s.print_expr(&field.expr)?;
s.end()
},
- |f| f.span));
+ |f| f.span)?;
match *wth {
Some(ref expr) => {
- try!(self.ibox(INDENT_UNIT));
+ self.ibox(INDENT_UNIT)?;
if !fields.is_empty() {
- try!(word(&mut self.s, ","));
- try!(space(&mut self.s));
+ word(&mut self.s, ",")?;
+ space(&mut self.s)?;
}
- try!(word(&mut self.s, ".."));
- try!(self.print_expr(&expr));
- try!(self.end());
+ word(&mut self.s, "..")?;
+ self.print_expr(&expr)?;
+ self.end()?;
}
_ => if !fields.is_empty() {
- try!(word(&mut self.s, ","))
+ word(&mut self.s, ",")?
}
}
- try!(word(&mut self.s, "}"));
+ word(&mut self.s, "}")?;
Ok(())
}
fn print_expr_tup(&mut self, exprs: &[P<ast::Expr>],
attrs: &[Attribute]) -> io::Result<()> {
- try!(self.popen());
- try!(self.print_inner_attributes_inline(attrs));
- try!(self.commasep_exprs(Inconsistent, &exprs[..]));
+ self.popen()?;
+ self.print_inner_attributes_inline(attrs)?;
+ self.commasep_exprs(Inconsistent, &exprs[..])?;
if exprs.len() == 1 {
- try!(word(&mut self.s, ","));
+ word(&mut self.s, ",")?;
}
self.pclose()
}
fn print_expr_call(&mut self,
func: &ast::Expr,
args: &[P<ast::Expr>]) -> io::Result<()> {
- try!(self.print_expr_maybe_paren(func));
+ self.print_expr_maybe_paren(func)?;
self.print_call_post(args)
}
tys: &[P<ast::Ty>],
args: &[P<ast::Expr>]) -> io::Result<()> {
let base_args = &args[1..];
- try!(self.print_expr(&args[0]));
- try!(word(&mut self.s, "."));
- try!(self.print_ident(ident.node));
+ self.print_expr(&args[0])?;
+ word(&mut self.s, ".")?;
+ self.print_ident(ident.node)?;
if !tys.is_empty() {
- try!(word(&mut self.s, "::<"));
- try!(self.commasep(Inconsistent, tys,
- |s, ty| s.print_type(&ty)));
- try!(word(&mut self.s, ">"));
+ word(&mut self.s, "::<")?;
+ self.commasep(Inconsistent, tys,
+ |s, ty| s.print_type(&ty))?;
+ word(&mut self.s, ">")?;
}
self.print_call_post(base_args)
}
lhs: &ast::Expr,
rhs: &ast::Expr) -> io::Result<()> {
if self.check_expr_bin_needs_paren(lhs, op) {
- try!(self.print_expr_maybe_paren(lhs));
+ self.print_expr_maybe_paren(lhs)?;
} else {
- try!(self.print_expr(lhs));
+ self.print_expr(lhs)?;
}
- try!(space(&mut self.s));
- try!(self.word_space(op.node.to_string()));
+ space(&mut self.s)?;
+ self.word_space(op.node.to_string())?;
if self.check_expr_bin_needs_paren(rhs, op) {
self.print_expr_maybe_paren(rhs)
} else {
fn print_expr_unary(&mut self,
op: ast::UnOp,
expr: &ast::Expr) -> io::Result<()> {
- try!(word(&mut self.s, ast::UnOp::to_string(op)));
+ word(&mut self.s, ast::UnOp::to_string(op))?;
self.print_expr_maybe_paren(expr)
}
fn print_expr_addr_of(&mut self,
mutability: ast::Mutability,
expr: &ast::Expr) -> io::Result<()> {
- try!(word(&mut self.s, "&"));
- try!(self.print_mutability(mutability));
+ word(&mut self.s, "&")?;
+ self.print_mutability(mutability)?;
self.print_expr_maybe_paren(expr)
}
fn print_expr_outer_attr_style(&mut self,
expr: &ast::Expr,
is_inline: bool) -> io::Result<()> {
- try!(self.maybe_print_comment(expr.span.lo));
+ self.maybe_print_comment(expr.span.lo)?;
let attrs = &expr.attrs;
if is_inline {
- try!(self.print_outer_attributes_inline(attrs));
+ self.print_outer_attributes_inline(attrs)?;
} else {
- try!(self.print_outer_attributes(attrs));
+ self.print_outer_attributes(attrs)?;
}
- try!(self.ibox(INDENT_UNIT));
- try!(self.ann.pre(self, NodeExpr(expr)));
+ self.ibox(INDENT_UNIT)?;
+ self.ann.pre(self, NodeExpr(expr))?;
match expr.node {
ast::ExprKind::Box(ref expr) => {
- try!(self.word_space("box"));
- try!(self.print_expr(expr));
+ self.word_space("box")?;
+ self.print_expr(expr)?;
}
ast::ExprKind::InPlace(ref place, ref expr) => {
- try!(self.print_expr_in_place(place, expr));
+ self.print_expr_in_place(place, expr)?;
}
ast::ExprKind::Vec(ref exprs) => {
- try!(self.print_expr_vec(&exprs[..], attrs));
+ self.print_expr_vec(&exprs[..], attrs)?;
}
ast::ExprKind::Repeat(ref element, ref count) => {
- try!(self.print_expr_repeat(&element, &count, attrs));
+ self.print_expr_repeat(&element, &count, attrs)?;
}
ast::ExprKind::Struct(ref path, ref fields, ref wth) => {
- try!(self.print_expr_struct(path, &fields[..], wth, attrs));
+ self.print_expr_struct(path, &fields[..], wth, attrs)?;
}
ast::ExprKind::Tup(ref exprs) => {
- try!(self.print_expr_tup(&exprs[..], attrs));
+ self.print_expr_tup(&exprs[..], attrs)?;
}
ast::ExprKind::Call(ref func, ref args) => {
- try!(self.print_expr_call(&func, &args[..]));
+ self.print_expr_call(&func, &args[..])?;
}
ast::ExprKind::MethodCall(ident, ref tys, ref args) => {
- try!(self.print_expr_method_call(ident, &tys[..], &args[..]));
+ self.print_expr_method_call(ident, &tys[..], &args[..])?;
}
ast::ExprKind::Binary(op, ref lhs, ref rhs) => {
- try!(self.print_expr_binary(op, &lhs, &rhs));
+ self.print_expr_binary(op, &lhs, &rhs)?;
}
ast::ExprKind::Unary(op, ref expr) => {
- try!(self.print_expr_unary(op, &expr));
+ self.print_expr_unary(op, &expr)?;
}
ast::ExprKind::AddrOf(m, ref expr) => {
- try!(self.print_expr_addr_of(m, &expr));
+ self.print_expr_addr_of(m, &expr)?;
}
ast::ExprKind::Lit(ref lit) => {
- try!(self.print_literal(&lit));
+ self.print_literal(&lit)?;
}
ast::ExprKind::Cast(ref expr, ref ty) => {
if let ast::ExprKind::Cast(..) = expr.node {
- try!(self.print_expr(&expr));
+ self.print_expr(&expr)?;
} else {
- try!(self.print_expr_maybe_paren(&expr));
+ self.print_expr_maybe_paren(&expr)?;
}
- try!(space(&mut self.s));
- try!(self.word_space("as"));
- try!(self.print_type(&ty));
+ space(&mut self.s)?;
+ self.word_space("as")?;
+ self.print_type(&ty)?;
}
ast::ExprKind::Type(ref expr, ref ty) => {
- try!(self.print_expr(&expr));
- try!(self.word_space(":"));
- try!(self.print_type(&ty));
+ self.print_expr(&expr)?;
+ self.word_space(":")?;
+ self.print_type(&ty)?;
}
ast::ExprKind::If(ref test, ref blk, ref elseopt) => {
- try!(self.print_if(&test, &blk, elseopt.as_ref().map(|e| &**e)));
+ self.print_if(&test, &blk, elseopt.as_ref().map(|e| &**e))?;
}
ast::ExprKind::IfLet(ref pat, ref expr, ref blk, ref elseopt) => {
- try!(self.print_if_let(&pat, &expr, &blk, elseopt.as_ref().map(|e| &**e)));
+ self.print_if_let(&pat, &expr, &blk, elseopt.as_ref().map(|e| &**e))?;
}
ast::ExprKind::While(ref test, ref blk, opt_ident) => {
if let Some(ident) = opt_ident {
- try!(self.print_ident(ident.node));
- try!(self.word_space(":"));
+ self.print_ident(ident.node)?;
+ self.word_space(":")?;
}
- try!(self.head("while"));
- try!(self.print_expr(&test));
- try!(space(&mut self.s));
- try!(self.print_block_with_attrs(&blk, attrs));
+ self.head("while")?;
+ self.print_expr(&test)?;
+ space(&mut self.s)?;
+ self.print_block_with_attrs(&blk, attrs)?;
}
ast::ExprKind::WhileLet(ref pat, ref expr, ref blk, opt_ident) => {
if let Some(ident) = opt_ident {
- try!(self.print_ident(ident.node));
- try!(self.word_space(":"));
+ self.print_ident(ident.node)?;
+ self.word_space(":")?;
}
- try!(self.head("while let"));
- try!(self.print_pat(&pat));
- try!(space(&mut self.s));
- try!(self.word_space("="));
- try!(self.print_expr(&expr));
- try!(space(&mut self.s));
- try!(self.print_block_with_attrs(&blk, attrs));
+ self.head("while let")?;
+ self.print_pat(&pat)?;
+ space(&mut self.s)?;
+ self.word_space("=")?;
+ self.print_expr(&expr)?;
+ space(&mut self.s)?;
+ self.print_block_with_attrs(&blk, attrs)?;
}
ast::ExprKind::ForLoop(ref pat, ref iter, ref blk, opt_ident) => {
if let Some(ident) = opt_ident {
- try!(self.print_ident(ident.node));
- try!(self.word_space(":"));
+ self.print_ident(ident.node)?;
+ self.word_space(":")?;
}
- try!(self.head("for"));
- try!(self.print_pat(&pat));
- try!(space(&mut self.s));
- try!(self.word_space("in"));
- try!(self.print_expr(&iter));
- try!(space(&mut self.s));
- try!(self.print_block_with_attrs(&blk, attrs));
+ self.head("for")?;
+ self.print_pat(&pat)?;
+ space(&mut self.s)?;
+ self.word_space("in")?;
+ self.print_expr(&iter)?;
+ space(&mut self.s)?;
+ self.print_block_with_attrs(&blk, attrs)?;
}
ast::ExprKind::Loop(ref blk, opt_ident) => {
if let Some(ident) = opt_ident {
- try!(self.print_ident(ident.node));
- try!(self.word_space(":"));
+ self.print_ident(ident.node)?;
+ self.word_space(":")?;
}
- try!(self.head("loop"));
- try!(space(&mut self.s));
- try!(self.print_block_with_attrs(&blk, attrs));
+ self.head("loop")?;
+ space(&mut self.s)?;
+ self.print_block_with_attrs(&blk, attrs)?;
}
ast::ExprKind::Match(ref expr, ref arms) => {
- try!(self.cbox(INDENT_UNIT));
- try!(self.ibox(4));
- try!(self.word_nbsp("match"));
- try!(self.print_expr(&expr));
- try!(space(&mut self.s));
- try!(self.bopen());
- try!(self.print_inner_attributes_no_trailing_hardbreak(attrs));
+ self.cbox(INDENT_UNIT)?;
+ self.ibox(4)?;
+ self.word_nbsp("match")?;
+ self.print_expr(&expr)?;
+ space(&mut self.s)?;
+ self.bopen()?;
+ self.print_inner_attributes_no_trailing_hardbreak(attrs)?;
for arm in arms {
- try!(self.print_arm(arm));
+ self.print_arm(arm)?;
}
- try!(self.bclose_(expr.span, INDENT_UNIT));
+ self.bclose_(expr.span, INDENT_UNIT)?;
}
ast::ExprKind::Closure(capture_clause, ref decl, ref body, _) => {
- try!(self.print_capture_clause(capture_clause));
+ self.print_capture_clause(capture_clause)?;
- try!(self.print_fn_block_args(&decl));
- try!(space(&mut self.s));
- try!(self.print_expr(body));
- try!(self.end()); // need to close a box
+ self.print_fn_block_args(&decl)?;
+ space(&mut self.s)?;
+ self.print_expr(body)?;
+ self.end()?; // need to close a box
// a box will be closed by print_expr, but we didn't want an overall
// wrapper so we closed the corresponding opening. so create an
// empty box to satisfy the close.
- try!(self.ibox(0));
+ self.ibox(0)?;
}
ast::ExprKind::Block(ref blk) => {
// containing cbox, will be closed by print-block at }
- try!(self.cbox(INDENT_UNIT));
+ self.cbox(INDENT_UNIT)?;
// head-box, will be closed by print-block after {
- try!(self.ibox(0));
- try!(self.print_block_with_attrs(&blk, attrs));
+ self.ibox(0)?;
+ self.print_block_with_attrs(&blk, attrs)?;
}
ast::ExprKind::Assign(ref lhs, ref rhs) => {
- try!(self.print_expr(&lhs));
- try!(space(&mut self.s));
- try!(self.word_space("="));
- try!(self.print_expr(&rhs));
+ self.print_expr(&lhs)?;
+ space(&mut self.s)?;
+ self.word_space("=")?;
+ self.print_expr(&rhs)?;
}
ast::ExprKind::AssignOp(op, ref lhs, ref rhs) => {
- try!(self.print_expr(&lhs));
- try!(space(&mut self.s));
- try!(word(&mut self.s, op.node.to_string()));
- try!(self.word_space("="));
- try!(self.print_expr(&rhs));
+ self.print_expr(&lhs)?;
+ space(&mut self.s)?;
+ word(&mut self.s, op.node.to_string())?;
+ self.word_space("=")?;
+ self.print_expr(&rhs)?;
}
ast::ExprKind::Field(ref expr, id) => {
- try!(self.print_expr(&expr));
- try!(word(&mut self.s, "."));
- try!(self.print_ident(id.node));
+ self.print_expr(&expr)?;
+ word(&mut self.s, ".")?;
+ self.print_ident(id.node)?;
}
ast::ExprKind::TupField(ref expr, id) => {
- try!(self.print_expr(&expr));
- try!(word(&mut self.s, "."));
- try!(self.print_usize(id.node));
+ self.print_expr(&expr)?;
+ word(&mut self.s, ".")?;
+ self.print_usize(id.node)?;
}
ast::ExprKind::Index(ref expr, ref index) => {
- try!(self.print_expr(&expr));
- try!(word(&mut self.s, "["));
- try!(self.print_expr(&index));
- try!(word(&mut self.s, "]"));
+ self.print_expr(&expr)?;
+ word(&mut self.s, "[")?;
+ self.print_expr(&index)?;
+ word(&mut self.s, "]")?;
}
ast::ExprKind::Range(ref start, ref end, limits) => {
if let &Some(ref e) = start {
- try!(self.print_expr(&e));
+ self.print_expr(&e)?;
}
if limits == ast::RangeLimits::HalfOpen {
- try!(word(&mut self.s, ".."));
+ word(&mut self.s, "..")?;
} else {
- try!(word(&mut self.s, "..."));
+ word(&mut self.s, "...")?;
}
if let &Some(ref e) = end {
- try!(self.print_expr(&e));
+ self.print_expr(&e)?;
}
}
ast::ExprKind::Path(None, ref path) => {
- try!(self.print_path(path, true, 0, false))
+ self.print_path(path, true, 0, false)?
}
ast::ExprKind::Path(Some(ref qself), ref path) => {
- try!(self.print_qpath(path, qself, true))
+ self.print_qpath(path, qself, true)?
}
ast::ExprKind::Break(opt_ident, ref opt_expr) => {
- try!(word(&mut self.s, "break"));
- try!(space(&mut self.s));
+ word(&mut self.s, "break")?;
+ space(&mut self.s)?;
if let Some(ident) = opt_ident {
- try!(self.print_ident(ident.node));
- try!(space(&mut self.s));
+ self.print_ident(ident.node)?;
+ space(&mut self.s)?;
}
if let Some(ref expr) = *opt_expr {
- try!(self.print_expr(expr));
- try!(space(&mut self.s));
+ self.print_expr(expr)?;
+ space(&mut self.s)?;
}
}
ast::ExprKind::Continue(opt_ident) => {
- try!(word(&mut self.s, "continue"));
- try!(space(&mut self.s));
+ word(&mut self.s, "continue")?;
+ space(&mut self.s)?;
if let Some(ident) = opt_ident {
- try!(self.print_ident(ident.node));
- try!(space(&mut self.s))
+ self.print_ident(ident.node)?;
+ space(&mut self.s)?
}
}
ast::ExprKind::Ret(ref result) => {
- try!(word(&mut self.s, "return"));
+ word(&mut self.s, "return")?;
match *result {
Some(ref expr) => {
- try!(word(&mut self.s, " "));
- try!(self.print_expr(&expr));
+ word(&mut self.s, " ")?;
+ self.print_expr(&expr)?;
}
_ => ()
}
}
ast::ExprKind::InlineAsm(ref a) => {
- try!(word(&mut self.s, "asm!"));
- try!(self.popen());
- try!(self.print_string(&a.asm.as_str(), a.asm_str_style));
- try!(self.word_space(":"));
+ word(&mut self.s, "asm!")?;
+ self.popen()?;
+ self.print_string(&a.asm.as_str(), a.asm_str_style)?;
+ self.word_space(":")?;
- try!(self.commasep(Inconsistent, &a.outputs, |s, out| {
+ self.commasep(Inconsistent, &a.outputs, |s, out| {
let constraint = out.constraint.as_str();
let mut ch = constraint.chars();
match ch.next() {
Some('=') if out.is_rw => {
- try!(s.print_string(&format!("+{}", ch.as_str()),
- ast::StrStyle::Cooked))
+ s.print_string(&format!("+{}", ch.as_str()),
+ ast::StrStyle::Cooked)?
}
- _ => try!(s.print_string(&constraint, ast::StrStyle::Cooked))
+ _ => s.print_string(&constraint, ast::StrStyle::Cooked)?
}
- try!(s.popen());
- try!(s.print_expr(&out.expr));
- try!(s.pclose());
+ s.popen()?;
+ s.print_expr(&out.expr)?;
+ s.pclose()?;
Ok(())
- }));
- try!(space(&mut self.s));
- try!(self.word_space(":"));
-
- try!(self.commasep(Inconsistent, &a.inputs, |s, &(co, ref o)| {
- try!(s.print_string(&co.as_str(), ast::StrStyle::Cooked));
- try!(s.popen());
- try!(s.print_expr(&o));
- try!(s.pclose());
+ })?;
+ space(&mut self.s)?;
+ self.word_space(":")?;
+
+ self.commasep(Inconsistent, &a.inputs, |s, &(co, ref o)| {
+ s.print_string(&co.as_str(), ast::StrStyle::Cooked)?;
+ s.popen()?;
+ s.print_expr(&o)?;
+ s.pclose()?;
Ok(())
- }));
- try!(space(&mut self.s));
- try!(self.word_space(":"));
+ })?;
+ space(&mut self.s)?;
+ self.word_space(":")?;
- try!(self.commasep(Inconsistent, &a.clobbers,
+ self.commasep(Inconsistent, &a.clobbers,
|s, co| {
- try!(s.print_string(&co.as_str(), ast::StrStyle::Cooked));
+ s.print_string(&co.as_str(), ast::StrStyle::Cooked)?;
Ok(())
- }));
+ })?;
let mut options = vec![];
if a.volatile {
}
if !options.is_empty() {
- try!(space(&mut self.s));
- try!(self.word_space(":"));
- try!(self.commasep(Inconsistent, &options,
+ space(&mut self.s)?;
+ self.word_space(":")?;
+ self.commasep(Inconsistent, &options,
|s, &co| {
- try!(s.print_string(co, ast::StrStyle::Cooked));
+ s.print_string(co, ast::StrStyle::Cooked)?;
Ok(())
- }));
+ })?;
}
- try!(self.pclose());
+ self.pclose()?;
}
- ast::ExprKind::Mac(ref m) => try!(self.print_mac(m, token::Paren)),
+ ast::ExprKind::Mac(ref m) => self.print_mac(m, token::Paren)?,
ast::ExprKind::Paren(ref e) => {
- try!(self.popen());
- try!(self.print_inner_attributes_inline(attrs));
- try!(self.print_expr(&e));
- try!(self.pclose());
+ self.popen()?;
+ self.print_inner_attributes_inline(attrs)?;
+ self.print_expr(&e)?;
+ self.pclose()?;
},
ast::ExprKind::Try(ref e) => {
- try!(self.print_expr(e));
- try!(word(&mut self.s, "?"))
+ self.print_expr(e)?;
+ word(&mut self.s, "?")?
}
}
- try!(self.ann.post(self, NodeExpr(expr)));
+ self.ann.post(self, NodeExpr(expr))?;
self.end()
}
pub fn print_local_decl(&mut self, loc: &ast::Local) -> io::Result<()> {
- try!(self.print_pat(&loc.pat));
+ self.print_pat(&loc.pat)?;
if let Some(ref ty) = loc.ty {
- try!(self.word_space(":"));
- try!(self.print_type(&ty));
+ self.word_space(":")?;
+ self.print_type(&ty)?;
}
Ok(())
}
pub fn print_ident(&mut self, ident: ast::Ident) -> io::Result<()> {
- try!(word(&mut self.s, &ident.name.as_str()));
+ word(&mut self.s, &ident.name.as_str())?;
self.ann.post(self, NodeIdent(&ident))
}
}
pub fn print_name(&mut self, name: ast::Name) -> io::Result<()> {
- try!(word(&mut self.s, &name.as_str()));
+ word(&mut self.s, &name.as_str())?;
self.ann.post(self, NodeName(&name))
}
pub fn print_for_decl(&mut self, loc: &ast::Local,
coll: &ast::Expr) -> io::Result<()> {
- try!(self.print_local_decl(loc));
- try!(space(&mut self.s));
- try!(self.word_space("in"));
+ self.print_local_decl(loc)?;
+ space(&mut self.s)?;
+ self.word_space("in")?;
self.print_expr(coll)
}
defaults_to_global: bool)
-> io::Result<()>
{
- try!(self.maybe_print_comment(path.span.lo));
+ self.maybe_print_comment(path.span.lo)?;
let mut segments = path.segments[..path.segments.len()-depth].iter();
if defaults_to_global && path.is_global() {
}
for (i, segment) in segments.enumerate() {
if i > 0 {
- try!(word(&mut self.s, "::"))
+ word(&mut self.s, "::")?
}
if segment.identifier.name != keywords::CrateRoot.name() &&
segment.identifier.name != "$crate" {
- try!(self.print_ident(segment.identifier));
+ self.print_ident(segment.identifier)?;
if let Some(ref parameters) = segment.parameters {
- try!(self.print_path_parameters(parameters, colons_before_params));
+ self.print_path_parameters(parameters, colons_before_params)?;
}
}
}
colons_before_params: bool)
-> io::Result<()>
{
- try!(word(&mut self.s, "<"));
- try!(self.print_type(&qself.ty));
+ word(&mut self.s, "<")?;
+ self.print_type(&qself.ty)?;
if qself.position > 0 {
- try!(space(&mut self.s));
- try!(self.word_space("as"));
+ space(&mut self.s)?;
+ self.word_space("as")?;
let depth = path.segments.len() - qself.position;
- try!(self.print_path(&path, false, depth, false));
+ self.print_path(&path, false, depth, false)?;
}
- try!(word(&mut self.s, ">"));
- try!(word(&mut self.s, "::"));
+ word(&mut self.s, ">")?;
+ word(&mut self.s, "::")?;
let item_segment = path.segments.last().unwrap();
- try!(self.print_ident(item_segment.identifier));
+ self.print_ident(item_segment.identifier)?;
match item_segment.parameters {
Some(ref parameters) => self.print_path_parameters(parameters, colons_before_params),
None => Ok(()),
-> io::Result<()>
{
if colons_before_params {
- try!(word(&mut self.s, "::"))
+ word(&mut self.s, "::")?
}
match *parameters {
ast::PathParameters::AngleBracketed(ref data) => {
- try!(word(&mut self.s, "<"));
+ word(&mut self.s, "<")?;
let mut comma = false;
for lifetime in &data.lifetimes {
if comma {
- try!(self.word_space(","))
+ self.word_space(",")?
}
- try!(self.print_lifetime(lifetime));
+ self.print_lifetime(lifetime)?;
comma = true;
}
if !data.types.is_empty() {
if comma {
- try!(self.word_space(","))
+ self.word_space(",")?
}
- try!(self.commasep(
+ self.commasep(
Inconsistent,
&data.types,
- |s, ty| s.print_type(&ty)));
+ |s, ty| s.print_type(&ty))?;
comma = true;
}
for binding in data.bindings.iter() {
if comma {
- try!(self.word_space(","))
+ self.word_space(",")?
}
- try!(self.print_ident(binding.ident));
- try!(space(&mut self.s));
- try!(self.word_space("="));
- try!(self.print_type(&binding.ty));
+ self.print_ident(binding.ident)?;
+ space(&mut self.s)?;
+ self.word_space("=")?;
+ self.print_type(&binding.ty)?;
comma = true;
}
- try!(word(&mut self.s, ">"))
+ word(&mut self.s, ">")?
}
ast::PathParameters::Parenthesized(ref data) => {
- try!(word(&mut self.s, "("));
- try!(self.commasep(
+ word(&mut self.s, "(")?;
+ self.commasep(
Inconsistent,
&data.inputs,
- |s, ty| s.print_type(&ty)));
- try!(word(&mut self.s, ")"));
+ |s, ty| s.print_type(&ty))?;
+ word(&mut self.s, ")")?;
if let Some(ref ty) = data.output {
- try!(self.space_if_not_bol());
- try!(self.word_space("->"));
- try!(self.print_type(&ty));
+ self.space_if_not_bol()?;
+ self.word_space("->")?;
+ self.print_type(&ty)?;
}
}
}
}
pub fn print_pat(&mut self, pat: &ast::Pat) -> io::Result<()> {
- try!(self.maybe_print_comment(pat.span.lo));
- try!(self.ann.pre(self, NodePat(pat)));
+ self.maybe_print_comment(pat.span.lo)?;
+ self.ann.pre(self, NodePat(pat))?;
/* Pat isn't normalized, but the beauty of it
is that it doesn't matter */
match pat.node {
- PatKind::Wild => try!(word(&mut self.s, "_")),
+ PatKind::Wild => word(&mut self.s, "_")?,
PatKind::Ident(binding_mode, ref path1, ref sub) => {
match binding_mode {
ast::BindingMode::ByRef(mutbl) => {
- try!(self.word_nbsp("ref"));
- try!(self.print_mutability(mutbl));
+ self.word_nbsp("ref")?;
+ self.print_mutability(mutbl)?;
}
ast::BindingMode::ByValue(ast::Mutability::Immutable) => {}
ast::BindingMode::ByValue(ast::Mutability::Mutable) => {
- try!(self.word_nbsp("mut"));
+ self.word_nbsp("mut")?;
}
}
- try!(self.print_ident(path1.node));
+ self.print_ident(path1.node)?;
if let Some(ref p) = *sub {
- try!(word(&mut self.s, "@"));
- try!(self.print_pat(&p));
+ word(&mut self.s, "@")?;
+ self.print_pat(&p)?;
}
}
PatKind::TupleStruct(ref path, ref elts, ddpos) => {
- try!(self.print_path(path, true, 0, false));
- try!(self.popen());
+ self.print_path(path, true, 0, false)?;
+ self.popen()?;
if let Some(ddpos) = ddpos {
- try!(self.commasep(Inconsistent, &elts[..ddpos], |s, p| s.print_pat(&p)));
+ self.commasep(Inconsistent, &elts[..ddpos], |s, p| s.print_pat(&p))?;
if ddpos != 0 {
- try!(self.word_space(","));
+ self.word_space(",")?;
}
- try!(word(&mut self.s, ".."));
+ word(&mut self.s, "..")?;
if ddpos != elts.len() {
- try!(word(&mut self.s, ","));
- try!(self.commasep(Inconsistent, &elts[ddpos..], |s, p| s.print_pat(&p)));
+ word(&mut self.s, ",")?;
+ self.commasep(Inconsistent, &elts[ddpos..], |s, p| s.print_pat(&p))?;
}
} else {
- try!(self.commasep(Inconsistent, &elts[..], |s, p| s.print_pat(&p)));
+ self.commasep(Inconsistent, &elts[..], |s, p| s.print_pat(&p))?;
}
- try!(self.pclose());
+ self.pclose()?;
}
PatKind::Path(None, ref path) => {
- try!(self.print_path(path, true, 0, false));
+ self.print_path(path, true, 0, false)?;
}
PatKind::Path(Some(ref qself), ref path) => {
- try!(self.print_qpath(path, qself, false));
+ self.print_qpath(path, qself, false)?;
}
PatKind::Struct(ref path, ref fields, etc) => {
- try!(self.print_path(path, true, 0, false));
- try!(self.nbsp());
- try!(self.word_space("{"));
- try!(self.commasep_cmnt(
+ self.print_path(path, true, 0, false)?;
+ self.nbsp()?;
+ self.word_space("{")?;
+ self.commasep_cmnt(
Consistent, &fields[..],
|s, f| {
- try!(s.cbox(INDENT_UNIT));
+ s.cbox(INDENT_UNIT)?;
if !f.node.is_shorthand {
- try!(s.print_ident(f.node.ident));
- try!(s.word_nbsp(":"));
+ s.print_ident(f.node.ident)?;
+ s.word_nbsp(":")?;
}
- try!(s.print_pat(&f.node.pat));
+ s.print_pat(&f.node.pat)?;
s.end()
},
- |f| f.node.pat.span));
+ |f| f.node.pat.span)?;
if etc {
- if !fields.is_empty() { try!(self.word_space(",")); }
- try!(word(&mut self.s, ".."));
+ if !fields.is_empty() { self.word_space(",")?; }
+ word(&mut self.s, "..")?;
}
- try!(space(&mut self.s));
- try!(word(&mut self.s, "}"));
+ space(&mut self.s)?;
+ word(&mut self.s, "}")?;
}
PatKind::Tuple(ref elts, ddpos) => {
- try!(self.popen());
+ self.popen()?;
if let Some(ddpos) = ddpos {
- try!(self.commasep(Inconsistent, &elts[..ddpos], |s, p| s.print_pat(&p)));
+ self.commasep(Inconsistent, &elts[..ddpos], |s, p| s.print_pat(&p))?;
if ddpos != 0 {
- try!(self.word_space(","));
+ self.word_space(",")?;
}
- try!(word(&mut self.s, ".."));
+ word(&mut self.s, "..")?;
if ddpos != elts.len() {
- try!(word(&mut self.s, ","));
- try!(self.commasep(Inconsistent, &elts[ddpos..], |s, p| s.print_pat(&p)));
+ word(&mut self.s, ",")?;
+ self.commasep(Inconsistent, &elts[ddpos..], |s, p| s.print_pat(&p))?;
}
} else {
- try!(self.commasep(Inconsistent, &elts[..], |s, p| s.print_pat(&p)));
+ self.commasep(Inconsistent, &elts[..], |s, p| s.print_pat(&p))?;
if elts.len() == 1 {
- try!(word(&mut self.s, ","));
+ word(&mut self.s, ",")?;
}
}
- try!(self.pclose());
+ self.pclose()?;
}
PatKind::Box(ref inner) => {
- try!(word(&mut self.s, "box "));
- try!(self.print_pat(&inner));
+ word(&mut self.s, "box ")?;
+ self.print_pat(&inner)?;
}
PatKind::Ref(ref inner, mutbl) => {
- try!(word(&mut self.s, "&"));
+ word(&mut self.s, "&")?;
if mutbl == ast::Mutability::Mutable {
- try!(word(&mut self.s, "mut "));
+ word(&mut self.s, "mut ")?;
}
- try!(self.print_pat(&inner));
+ self.print_pat(&inner)?;
}
- PatKind::Lit(ref e) => try!(self.print_expr(&**e)),
+ PatKind::Lit(ref e) => self.print_expr(&**e)?,
PatKind::Range(ref begin, ref end) => {
- try!(self.print_expr(&begin));
- try!(space(&mut self.s));
- try!(word(&mut self.s, "..."));
- try!(self.print_expr(&end));
+ self.print_expr(&begin)?;
+ space(&mut self.s)?;
+ word(&mut self.s, "...")?;
+ self.print_expr(&end)?;
}
PatKind::Slice(ref before, ref slice, ref after) => {
- try!(word(&mut self.s, "["));
- try!(self.commasep(Inconsistent,
+ word(&mut self.s, "[")?;
+ self.commasep(Inconsistent,
&before[..],
- |s, p| s.print_pat(&p)));
+ |s, p| s.print_pat(&p))?;
if let Some(ref p) = *slice {
- if !before.is_empty() { try!(self.word_space(",")); }
+ if !before.is_empty() { self.word_space(",")?; }
if p.node != PatKind::Wild {
- try!(self.print_pat(&p));
+ self.print_pat(&p)?;
}
- try!(word(&mut self.s, ".."));
- if !after.is_empty() { try!(self.word_space(",")); }
+ word(&mut self.s, "..")?;
+ if !after.is_empty() { self.word_space(",")?; }
}
- try!(self.commasep(Inconsistent,
+ self.commasep(Inconsistent,
&after[..],
- |s, p| s.print_pat(&p)));
- try!(word(&mut self.s, "]"));
+ |s, p| s.print_pat(&p))?;
+ word(&mut self.s, "]")?;
}
- PatKind::Mac(ref m) => try!(self.print_mac(m, token::Paren)),
+ PatKind::Mac(ref m) => self.print_mac(m, token::Paren)?,
}
self.ann.post(self, NodePat(pat))
}
// I have no idea why this check is necessary, but here it
// is :(
if arm.attrs.is_empty() {
- try!(space(&mut self.s));
+ space(&mut self.s)?;
}
- try!(self.cbox(INDENT_UNIT));
- try!(self.ibox(0));
- try!(self.maybe_print_comment(arm.pats[0].span.lo));
- try!(self.print_outer_attributes(&arm.attrs));
+ self.cbox(INDENT_UNIT)?;
+ self.ibox(0)?;
+ self.maybe_print_comment(arm.pats[0].span.lo)?;
+ self.print_outer_attributes(&arm.attrs)?;
let mut first = true;
for p in &arm.pats {
if first {
first = false;
} else {
- try!(space(&mut self.s));
- try!(self.word_space("|"));
+ space(&mut self.s)?;
+ self.word_space("|")?;
}
- try!(self.print_pat(&p));
+ self.print_pat(&p)?;
}
- try!(space(&mut self.s));
+ space(&mut self.s)?;
if let Some(ref e) = arm.guard {
- try!(self.word_space("if"));
- try!(self.print_expr(&e));
- try!(space(&mut self.s));
+ self.word_space("if")?;
+ self.print_expr(&e)?;
+ space(&mut self.s)?;
}
- try!(self.word_space("=>"));
+ self.word_space("=>")?;
match arm.body.node {
ast::ExprKind::Block(ref blk) => {
// the block will close the pattern's ibox
- try!(self.print_block_unclosed_indent(&blk, INDENT_UNIT));
+ self.print_block_unclosed_indent(&blk, INDENT_UNIT)?;
// If it is a user-provided unsafe block, print a comma after it
if let BlockCheckMode::Unsafe(ast::UserProvided) = blk.rules {
- try!(word(&mut self.s, ","));
+ word(&mut self.s, ",")?;
}
}
_ => {
- try!(self.end()); // close the ibox for the pattern
- try!(self.print_expr(&arm.body));
- try!(word(&mut self.s, ","));
+ self.end()?; // close the ibox for the pattern
+ self.print_expr(&arm.body)?;
+ word(&mut self.s, ",")?;
}
}
self.end() // close enclosing cbox
fn print_explicit_self(&mut self, explicit_self: &ast::ExplicitSelf) -> io::Result<()> {
match explicit_self.node {
SelfKind::Value(m) => {
- try!(self.print_mutability(m));
+ self.print_mutability(m)?;
word(&mut self.s, "self")
}
SelfKind::Region(ref lt, m) => {
- try!(word(&mut self.s, "&"));
- try!(self.print_opt_lifetime(lt));
- try!(self.print_mutability(m));
+ word(&mut self.s, "&")?;
+ self.print_opt_lifetime(lt)?;
+ self.print_mutability(m)?;
word(&mut self.s, "self")
}
SelfKind::Explicit(ref typ, m) => {
- try!(self.print_mutability(m));
- try!(word(&mut self.s, "self"));
- try!(self.word_space(":"));
+ self.print_mutability(m)?;
+ word(&mut self.s, "self")?;
+ self.word_space(":")?;
self.print_type(&typ)
}
}
name: Option<ast::Ident>,
generics: &ast::Generics,
vis: &ast::Visibility) -> io::Result<()> {
- try!(self.print_fn_header_info(unsafety, constness, abi, vis));
+ self.print_fn_header_info(unsafety, constness, abi, vis)?;
if let Some(name) = name {
- try!(self.nbsp());
- try!(self.print_ident(name));
+ self.nbsp()?;
+ self.print_ident(name)?;
}
- try!(self.print_generics(generics));
- try!(self.print_fn_args_and_ret(decl));
+ self.print_generics(generics)?;
+ self.print_fn_args_and_ret(decl)?;
self.print_where_clause(&generics.where_clause)
}
pub fn print_fn_args_and_ret(&mut self, decl: &ast::FnDecl)
-> io::Result<()> {
- try!(self.popen());
- try!(self.commasep(Inconsistent, &decl.inputs, |s, arg| s.print_arg(arg, false)));
+ self.popen()?;
+ self.commasep(Inconsistent, &decl.inputs, |s, arg| s.print_arg(arg, false))?;
if decl.variadic {
- try!(word(&mut self.s, ", ..."));
+ word(&mut self.s, ", ...")?;
}
- try!(self.pclose());
+ self.pclose()?;
self.print_fn_output(decl)
}
&mut self,
decl: &ast::FnDecl)
-> io::Result<()> {
- try!(word(&mut self.s, "|"));
- try!(self.commasep(Inconsistent, &decl.inputs, |s, arg| s.print_arg(arg, true)));
- try!(word(&mut self.s, "|"));
+ word(&mut self.s, "|")?;
+ self.commasep(Inconsistent, &decl.inputs, |s, arg| s.print_arg(arg, true))?;
+ word(&mut self.s, "|")?;
if let ast::FunctionRetTy::Default(..) = decl.output {
return Ok(());
}
- try!(self.space_if_not_bol());
- try!(self.word_space("->"));
+ self.space_if_not_bol()?;
+ self.word_space("->")?;
match decl.output {
ast::FunctionRetTy::Ty(ref ty) => {
- try!(self.print_type(&ty));
+ self.print_type(&ty)?;
self.maybe_print_comment(ty.span.lo)
}
ast::FunctionRetTy::Default(..) => unreachable!(),
bounds: &[ast::TyParamBound])
-> io::Result<()> {
if !bounds.is_empty() {
- try!(word(&mut self.s, prefix));
+ word(&mut self.s, prefix)?;
let mut first = true;
for bound in bounds {
- try!(self.nbsp());
+ self.nbsp()?;
if first {
first = false;
} else {
- try!(self.word_space("+"));
+ self.word_space("+")?;
}
- try!(match *bound {
+ (match *bound {
TraitTyParamBound(ref tref, TraitBoundModifier::None) => {
self.print_poly_trait_ref(tref)
}
TraitTyParamBound(ref tref, TraitBoundModifier::Maybe) => {
- try!(word(&mut self.s, "?"));
+ word(&mut self.s, "?")?;
self.print_poly_trait_ref(tref)
}
RegionTyParamBound(ref lt) => {
self.print_lifetime(lt)
}
- })
+ })?
}
Ok(())
} else {
bounds: &[ast::Lifetime])
-> io::Result<()>
{
- try!(self.print_lifetime(lifetime));
+ self.print_lifetime(lifetime)?;
if !bounds.is_empty() {
- try!(word(&mut self.s, ": "));
+ word(&mut self.s, ": ")?;
for (i, bound) in bounds.iter().enumerate() {
if i != 0 {
- try!(word(&mut self.s, " + "));
+ word(&mut self.s, " + ")?;
}
- try!(self.print_lifetime(bound));
+ self.print_lifetime(bound)?;
}
}
Ok(())
return Ok(());
}
- try!(word(&mut self.s, "<"));
+ word(&mut self.s, "<")?;
let mut ints = Vec::new();
for i in 0..total {
ints.push(i);
}
- try!(self.commasep(Inconsistent, &ints[..], |s, &idx| {
+ self.commasep(Inconsistent, &ints[..], |s, &idx| {
if idx < generics.lifetimes.len() {
let lifetime_def = &generics.lifetimes[idx];
- try!(s.print_outer_attributes_inline(&lifetime_def.attrs));
+ s.print_outer_attributes_inline(&lifetime_def.attrs)?;
s.print_lifetime_bounds(&lifetime_def.lifetime, &lifetime_def.bounds)
} else {
let idx = idx - generics.lifetimes.len();
let param = &generics.ty_params[idx];
s.print_ty_param(param)
}
- }));
+ })?;
- try!(word(&mut self.s, ">"));
+ word(&mut self.s, ">")?;
Ok(())
}
pub fn print_ty_param(&mut self, param: &ast::TyParam) -> io::Result<()> {
- try!(self.print_outer_attributes_inline(¶m.attrs));
- try!(self.print_ident(param.ident));
- try!(self.print_bounds(":", ¶m.bounds));
+ self.print_outer_attributes_inline(¶m.attrs)?;
+ self.print_ident(param.ident)?;
+ self.print_bounds(":", ¶m.bounds)?;
match param.default {
Some(ref default) => {
- try!(space(&mut self.s));
- try!(self.word_space("="));
+ space(&mut self.s)?;
+ self.word_space("=")?;
self.print_type(&default)
}
_ => Ok(())
return Ok(())
}
- try!(space(&mut self.s));
- try!(self.word_space("where"));
+ space(&mut self.s)?;
+ self.word_space("where")?;
for (i, predicate) in where_clause.predicates.iter().enumerate() {
if i != 0 {
- try!(self.word_space(","));
+ self.word_space(",")?;
}
match *predicate {
ref bounded_ty,
ref bounds,
..}) => {
- try!(self.print_formal_lifetime_list(bound_lifetimes));
- try!(self.print_type(&bounded_ty));
- try!(self.print_bounds(":", bounds));
+ self.print_formal_lifetime_list(bound_lifetimes)?;
+ self.print_type(&bounded_ty)?;
+ self.print_bounds(":", bounds)?;
}
ast::WherePredicate::RegionPredicate(ast::WhereRegionPredicate{ref lifetime,
ref bounds,
..}) => {
- try!(self.print_lifetime_bounds(lifetime, bounds));
+ self.print_lifetime_bounds(lifetime, bounds)?;
}
ast::WherePredicate::EqPredicate(ast::WhereEqPredicate{ref path, ref ty, ..}) => {
- try!(self.print_path(path, false, 0, false));
- try!(space(&mut self.s));
- try!(self.word_space("="));
- try!(self.print_type(&ty));
+ self.print_path(path, false, 0, false)?;
+ space(&mut self.s)?;
+ self.word_space("=")?;
+ self.print_type(&ty)?;
}
}
}
pub fn print_view_path(&mut self, vp: &ast::ViewPath) -> io::Result<()> {
match vp.node {
ast::ViewPathSimple(ident, ref path) => {
- try!(self.print_path(path, false, 0, true));
+ self.print_path(path, false, 0, true)?;
if path.segments.last().unwrap().identifier.name !=
ident.name {
- try!(space(&mut self.s));
- try!(self.word_space("as"));
- try!(self.print_ident(ident));
+ space(&mut self.s)?;
+ self.word_space("as")?;
+ self.print_ident(ident)?;
}
Ok(())
}
ast::ViewPathGlob(ref path) => {
- try!(self.print_path(path, false, 0, true));
+ self.print_path(path, false, 0, true)?;
word(&mut self.s, "::*")
}
ast::ViewPathList(ref path, ref idents) => {
if path.segments.is_empty() {
- try!(word(&mut self.s, "{"));
+ word(&mut self.s, "{")?;
} else {
- try!(self.print_path(path, false, 0, true));
- try!(word(&mut self.s, "::{"));
+ self.print_path(path, false, 0, true)?;
+ word(&mut self.s, "::{")?;
}
- try!(self.commasep(Inconsistent, &idents[..], |s, w| {
- try!(s.print_ident(w.node.name));
+ self.commasep(Inconsistent, &idents[..], |s, w| {
+ s.print_ident(w.node.name)?;
if let Some(ident) = w.node.rename {
- try!(space(&mut s.s));
- try!(s.word_space("as"));
- try!(s.print_ident(ident));
+ space(&mut s.s)?;
+ s.word_space("as")?;
+ s.print_ident(ident)?;
}
Ok(())
- }));
+ })?;
word(&mut self.s, "}")
}
}
}
pub fn print_mt(&mut self, mt: &ast::MutTy) -> io::Result<()> {
- try!(self.print_mutability(mt.mutbl));
+ self.print_mutability(mt.mutbl)?;
self.print_type(&mt.ty)
}
pub fn print_arg(&mut self, input: &ast::Arg, is_closure: bool) -> io::Result<()> {
- try!(self.ibox(INDENT_UNIT));
+ self.ibox(INDENT_UNIT)?;
match input.ty.node {
- ast::TyKind::Infer if is_closure => try!(self.print_pat(&input.pat)),
+ ast::TyKind::Infer if is_closure => self.print_pat(&input.pat)?,
_ => {
if let Some(eself) = input.to_self() {
- try!(self.print_explicit_self(&eself));
+ self.print_explicit_self(&eself)?;
} else {
let invalid = if let PatKind::Ident(_, ident, _) = input.pat.node {
ident.node.name == keywords::Invalid.name()
false
};
if !invalid {
- try!(self.print_pat(&input.pat));
- try!(word(&mut self.s, ":"));
- try!(space(&mut self.s));
+ self.print_pat(&input.pat)?;
+ word(&mut self.s, ":")?;
+ space(&mut self.s)?;
}
- try!(self.print_type(&input.ty));
+ self.print_type(&input.ty)?;
}
}
}
return Ok(());
}
- try!(self.space_if_not_bol());
- try!(self.ibox(INDENT_UNIT));
- try!(self.word_space("->"));
+ self.space_if_not_bol()?;
+ self.ibox(INDENT_UNIT)?;
+ self.word_space("->")?;
match decl.output {
ast::FunctionRetTy::Default(..) => unreachable!(),
ast::FunctionRetTy::Ty(ref ty) =>
- try!(self.print_type(&ty))
+ self.print_type(&ty)?
}
- try!(self.end());
+ self.end()?;
match decl.output {
ast::FunctionRetTy::Ty(ref output) => self.maybe_print_comment(output.span.lo),
name: Option<ast::Ident>,
generics: &ast::Generics)
-> io::Result<()> {
- try!(self.ibox(INDENT_UNIT));
+ self.ibox(INDENT_UNIT)?;
if !generics.lifetimes.is_empty() || !generics.ty_params.is_empty() {
- try!(word(&mut self.s, "for"));
- try!(self.print_generics(generics));
+ word(&mut self.s, "for")?;
+ self.print_generics(generics)?;
}
let generics = ast::Generics {
lifetimes: Vec::new(),
},
span: syntax_pos::DUMMY_SP,
};
- try!(self.print_fn(decl,
+ self.print_fn(decl,
unsafety,
ast::Constness::NotConst,
abi,
name,
&generics,
- &ast::Visibility::Inherited));
+ &ast::Visibility::Inherited)?;
self.end()
}
// If there aren't any remaining comments, then we need to manually
// make sure there is a line break at the end.
if self.next_comment().is_none() {
- try!(hardbreak(&mut self.s));
+ hardbreak(&mut self.s)?;
}
loop {
match self.next_comment() {
Some(ref cmnt) => {
- try!(self.print_comment(cmnt));
+ self.print_comment(cmnt)?;
self.cur_cmnt_and_lit.cur_cmnt += 1;
}
_ => break
match opt_abi {
Some(Abi::Rust) => Ok(()),
Some(abi) => {
- try!(self.word_nbsp("extern"));
+ self.word_nbsp("extern")?;
self.word_nbsp(&abi.to_string())
}
None => Ok(())
opt_abi: Option<Abi>) -> io::Result<()> {
match opt_abi {
Some(abi) => {
- try!(self.word_nbsp("extern"));
+ self.word_nbsp("extern")?;
self.word_nbsp(&abi.to_string())
}
None => Ok(())
constness: ast::Constness,
abi: Abi,
vis: &ast::Visibility) -> io::Result<()> {
- try!(word(&mut self.s, &visibility_qualified(vis, "")));
+ word(&mut self.s, &visibility_qualified(vis, ""))?;
match constness {
ast::Constness::NotConst => {}
- ast::Constness::Const => try!(self.word_nbsp("const"))
+ ast::Constness::Const => self.word_nbsp("const")?
}
- try!(self.print_unsafety(unsafety));
+ self.print_unsafety(unsafety)?;
if abi != Abi::Rust {
- try!(self.word_nbsp("extern"));
- try!(self.word_nbsp(&abi.to_string()));
+ self.word_nbsp("extern")?;
+ self.word_nbsp(&abi.to_string())?;
}
word(&mut self.s, "fn")
projects / rust.git / commitdiff