diff options
Diffstat (limited to 'src/libsyntax/print')
| -rw-r--r-- | src/libsyntax/print/pprust.rs | 139 |
1 files changed, 95 insertions, 44 deletions
diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs index c573cc0c0ad..998049b83cc 100644 --- a/src/libsyntax/print/pprust.rs +++ b/src/libsyntax/print/pprust.rs @@ -584,7 +584,11 @@ impl<'a> State<'a> { ast::TyBareFn(f) => { let generics = ast::Generics { lifetimes: f.lifetimes.clone(), - ty_params: OwnedSlice::empty() + ty_params: OwnedSlice::empty(), + where_clause: ast::WhereClause { + id: ast::DUMMY_NODE_ID, + predicates: Vec::new(), + }, }; try!(self.print_ty_fn(Some(f.abi), None, @@ -601,7 +605,11 @@ impl<'a> State<'a> { ast::TyClosure(f, ref region) => { let generics = ast::Generics { lifetimes: f.lifetimes.clone(), - ty_params: OwnedSlice::empty() + ty_params: OwnedSlice::empty(), + where_clause: ast::WhereClause { + id: ast::DUMMY_NODE_ID, + predicates: Vec::new(), + }, }; try!(self.print_ty_fn(None, Some('&'), @@ -618,7 +626,11 @@ impl<'a> State<'a> { ast::TyProc(ref f) => { let generics = ast::Generics { lifetimes: f.lifetimes.clone(), - ty_params: OwnedSlice::empty() + ty_params: OwnedSlice::empty(), + where_clause: ast::WhereClause { + id: ast::DUMMY_NODE_ID, + predicates: Vec::new(), + }, }; try!(self.print_ty_fn(None, Some('~'), @@ -765,6 +777,7 @@ impl<'a> State<'a> { try!(space(&mut self.s)); try!(self.word_space("=")); try!(self.print_type(&**ty)); + try!(self.print_where_clause(params)); try!(word(&mut self.s, ";")); try!(self.end()); // end the outer ibox } @@ -808,6 +821,7 @@ impl<'a> State<'a> { } try!(self.print_type(&**ty)); + try!(self.print_where_clause(generics)); try!(space(&mut self.s)); try!(self.bopen()); @@ -845,6 +859,7 @@ impl<'a> State<'a> { try!(self.print_path(&trait_.path, false)); } } + try!(self.print_where_clause(generics)); try!(word(&mut self.s, " ")); try!(self.bopen()); for meth in methods.iter() { @@ -880,6 +895,7 @@ impl<'a> State<'a> { try!(self.head(visibility_qualified(visibility, "enum").as_slice())); try!(self.print_ident(ident)); try!(self.print_generics(generics)); + try!(self.print_where_clause(generics)); try!(space(&mut self.s)); self.print_variants(enum_definition.variants.as_slice(), span) } @@ -2010,7 +2026,8 @@ impl<'a> State<'a> { try!(self.nbsp()); try!(self.print_ident(name)); try!(self.print_generics(generics)); - self.print_fn_args_and_ret(decl, opt_explicit_self) + try!(self.print_fn_args_and_ret(decl, opt_explicit_self)) + self.print_where_clause(generics) } pub fn print_fn_args(&mut self, decl: &ast::FnDecl, @@ -2201,54 +2218,83 @@ impl<'a> State<'a> { Ok(()) } - pub fn print_generics(&mut self, - generics: &ast::Generics) -> IoResult<()> { - let total = generics.lifetimes.len() + generics.ty_params.len(); - if total > 0 { - try!(word(&mut self.s, "<")); + fn print_type_parameters(&mut self, + lifetimes: &[ast::LifetimeDef], + ty_params: &[ast::TyParam]) + -> IoResult<()> { + let total = lifetimes.len() + ty_params.len(); + let mut ints = Vec::new(); + for i in range(0u, total) { + ints.push(i); + } - let mut ints = Vec::new(); - for i in range(0u, total) { - ints.push(i); - } - - try!(self.commasep( - Inconsistent, ints.as_slice(), - |s, &idx| { - if idx < generics.lifetimes.len() { - let lifetime = generics.lifetimes.get(idx); - s.print_lifetime_def(lifetime) - } else { - let idx = idx - generics.lifetimes.len(); - let param = generics.ty_params.get(idx); - match param.unbound { - Some(TraitTyParamBound(ref tref)) => { - try!(s.print_trait_ref(tref)); - try!(s.word_space("?")); - } - _ => {} - } - try!(s.print_ident(param.ident)); - try!(s.print_bounds(&None, - ¶m.bounds, - false, - false)); - match param.default { - Some(ref default) => { - try!(space(&mut s.s)); - try!(s.word_space("=")); - s.print_type(&**default) - } - _ => Ok(()) - } + self.commasep(Inconsistent, ints.as_slice(), |s, &idx| { + if idx < lifetimes.len() { + let lifetime = &lifetimes[idx]; + s.print_lifetime_def(lifetime) + } else { + let idx = idx - lifetimes.len(); + let param = &ty_params[idx]; + match param.unbound { + Some(TraitTyParamBound(ref tref)) => { + try!(s.print_trait_ref(tref)); + try!(s.word_space("?")); } - })); + _ => {} + } + try!(s.print_ident(param.ident)); + try!(s.print_bounds(&None, + ¶m.bounds, + false, + false)); + match param.default { + Some(ref default) => { + try!(space(&mut s.s)); + try!(s.word_space("=")); + s.print_type(&**default) + } + _ => Ok(()) + } + } + }) + } + + pub fn print_generics(&mut self, generics: &ast::Generics) + -> IoResult<()> { + if generics.lifetimes.len() + generics.ty_params.len() > 0 { + try!(word(&mut self.s, "<")); + try!(self.print_type_parameters(generics.lifetimes.as_slice(), + generics.ty_params.as_slice())); word(&mut self.s, ">") } else { Ok(()) } } + pub fn print_where_clause(&mut self, generics: &ast::Generics) + -> IoResult<()> { + if generics.where_clause.predicates.len() == 0 { + return Ok(()) + } + + try!(space(&mut self.s)); + try!(self.word_space("where")); + + for (i, predicate) in generics.where_clause + .predicates + .iter() + .enumerate() { + if i != 0 { + try!(self.word_space(",")); + } + + try!(self.print_ident(predicate.ident)); + try!(self.print_bounds(&None, &predicate.bounds, false, false)); + } + + Ok(()) + } + pub fn print_meta_item(&mut self, item: &ast::MetaItem) -> IoResult<()> { try!(self.ibox(indent_unit)); match item.node { @@ -2472,6 +2518,11 @@ impl<'a> State<'a> { } } + match generics { + Some(generics) => try!(self.print_where_clause(generics)), + None => {} + } + self.end() } |