diff options
Diffstat (limited to 'compiler/rustc_save_analysis/src/sig.rs')
| -rw-r--r-- | compiler/rustc_save_analysis/src/sig.rs | 923 |
1 files changed, 0 insertions, 923 deletions
diff --git a/compiler/rustc_save_analysis/src/sig.rs b/compiler/rustc_save_analysis/src/sig.rs deleted file mode 100644 index 5a1bcb8fd..000000000 --- a/compiler/rustc_save_analysis/src/sig.rs +++ /dev/null @@ -1,923 +0,0 @@ -// A signature is a string representation of an item's type signature, excluding -// any body. It also includes ids for any defs or refs in the signature. For -// example: -// -// ``` -// fn foo(x: String) { -// println!("{}", x); -// } -// ``` -// The signature string is something like "fn foo(x: String) {}" and the signature -// will have defs for `foo` and `x` and a ref for `String`. -// -// All signature text should parse in the correct context (i.e., in a module or -// impl, etc.). Clients may want to trim trailing `{}` or `;`. The text of a -// signature is not guaranteed to be stable (it may improve or change as the -// syntax changes, or whitespace or punctuation may change). It is also likely -// not to be pretty - no attempt is made to prettify the text. It is recommended -// that clients run the text through Rustfmt. -// -// This module generates Signatures for items by walking the AST and looking up -// references. -// -// Signatures do not include visibility info. I'm not sure if this is a feature -// or an omission (FIXME). -// -// FIXME where clauses need implementing, defs/refs in generics are mostly missing. - -use crate::{id_from_def_id, id_from_hir_id, SaveContext}; - -use rls_data::{SigElement, Signature}; - -use rustc_ast::Mutability; -use rustc_hir as hir; -use rustc_hir::def::{DefKind, Res}; -use rustc_hir_pretty::id_to_string; -use rustc_hir_pretty::{bounds_to_string, path_segment_to_string, path_to_string, ty_to_string}; -use rustc_span::symbol::{Ident, Symbol}; - -pub fn item_signature(item: &hir::Item<'_>, scx: &SaveContext<'_>) -> Option<Signature> { - if !scx.config.signatures { - return None; - } - item.make(0, None, scx).ok() -} - -pub fn foreign_item_signature( - item: &hir::ForeignItem<'_>, - scx: &SaveContext<'_>, -) -> Option<Signature> { - if !scx.config.signatures { - return None; - } - item.make(0, None, scx).ok() -} - -/// Signature for a struct or tuple field declaration. -/// Does not include a trailing comma. -pub fn field_signature(field: &hir::FieldDef<'_>, scx: &SaveContext<'_>) -> Option<Signature> { - if !scx.config.signatures { - return None; - } - field.make(0, None, scx).ok() -} - -/// Does not include a trailing comma. -pub fn variant_signature(variant: &hir::Variant<'_>, scx: &SaveContext<'_>) -> Option<Signature> { - if !scx.config.signatures { - return None; - } - variant.make(0, None, scx).ok() -} - -pub fn method_signature( - id: hir::HirId, - ident: Ident, - generics: &hir::Generics<'_>, - m: &hir::FnSig<'_>, - scx: &SaveContext<'_>, -) -> Option<Signature> { - if !scx.config.signatures { - return None; - } - make_method_signature(id, ident, generics, m, scx).ok() -} - -pub fn assoc_const_signature( - id: hir::HirId, - ident: Symbol, - ty: &hir::Ty<'_>, - default: Option<&hir::Expr<'_>>, - scx: &SaveContext<'_>, -) -> Option<Signature> { - if !scx.config.signatures { - return None; - } - make_assoc_const_signature(id, ident, ty, default, scx).ok() -} - -pub fn assoc_type_signature( - id: hir::HirId, - ident: Ident, - bounds: Option<hir::GenericBounds<'_>>, - default: Option<&hir::Ty<'_>>, - scx: &SaveContext<'_>, -) -> Option<Signature> { - if !scx.config.signatures { - return None; - } - make_assoc_type_signature(id, ident, bounds, default, scx).ok() -} - -type Result = std::result::Result<Signature, &'static str>; - -trait Sig { - fn make(&self, offset: usize, id: Option<hir::HirId>, scx: &SaveContext<'_>) -> Result; -} - -fn extend_sig( - mut sig: Signature, - text: String, - defs: Vec<SigElement>, - refs: Vec<SigElement>, -) -> Signature { - sig.text = text; - sig.defs.extend(defs.into_iter()); - sig.refs.extend(refs.into_iter()); - sig -} - -fn replace_text(mut sig: Signature, text: String) -> Signature { - sig.text = text; - sig -} - -fn merge_sigs(text: String, sigs: Vec<Signature>) -> Signature { - let mut result = Signature { text, defs: vec![], refs: vec![] }; - - let (defs, refs): (Vec<_>, Vec<_>) = sigs.into_iter().map(|s| (s.defs, s.refs)).unzip(); - - result.defs.extend(defs.into_iter().flat_map(|ds| ds.into_iter())); - result.refs.extend(refs.into_iter().flat_map(|rs| rs.into_iter())); - - result -} - -fn text_sig(text: String) -> Signature { - Signature { text, defs: vec![], refs: vec![] } -} - -impl<'hir> Sig for hir::Ty<'hir> { - fn make(&self, offset: usize, _parent_id: Option<hir::HirId>, scx: &SaveContext<'_>) -> Result { - let id = Some(self.hir_id); - match self.kind { - hir::TyKind::Slice(ref ty) => { - let nested = ty.make(offset + 1, id, scx)?; - let text = format!("[{}]", nested.text); - Ok(replace_text(nested, text)) - } - hir::TyKind::Ptr(ref mt) => { - let prefix = match mt.mutbl { - hir::Mutability::Mut => "*mut ", - hir::Mutability::Not => "*const ", - }; - let nested = mt.ty.make(offset + prefix.len(), id, scx)?; - let text = format!("{}{}", prefix, nested.text); - Ok(replace_text(nested, text)) - } - hir::TyKind::Ref(ref lifetime, ref mt) => { - let mut prefix = "&".to_owned(); - prefix.push_str(&lifetime.ident.to_string()); - prefix.push(' '); - if mt.mutbl.is_mut() { - prefix.push_str("mut "); - }; - - let nested = mt.ty.make(offset + prefix.len(), id, scx)?; - let text = format!("{}{}", prefix, nested.text); - Ok(replace_text(nested, text)) - } - hir::TyKind::Never => Ok(text_sig("!".to_owned())), - hir::TyKind::Tup(ts) => { - let mut text = "(".to_owned(); - let mut defs = vec![]; - let mut refs = vec![]; - for t in ts { - let nested = t.make(offset + text.len(), id, scx)?; - text.push_str(&nested.text); - text.push(','); - defs.extend(nested.defs.into_iter()); - refs.extend(nested.refs.into_iter()); - } - text.push(')'); - Ok(Signature { text, defs, refs }) - } - hir::TyKind::BareFn(ref f) => { - let mut text = String::new(); - if !f.generic_params.is_empty() { - // FIXME defs, bounds on lifetimes - text.push_str("for<"); - text.push_str( - &f.generic_params - .iter() - .filter_map(|param| match param.kind { - hir::GenericParamKind::Lifetime { .. } => { - Some(param.name.ident().to_string()) - } - _ => None, - }) - .collect::<Vec<_>>() - .join(", "), - ); - text.push('>'); - } - - if let hir::Unsafety::Unsafe = f.unsafety { - text.push_str("unsafe "); - } - text.push_str("fn("); - - let mut defs = vec![]; - let mut refs = vec![]; - for i in f.decl.inputs { - let nested = i.make(offset + text.len(), Some(i.hir_id), scx)?; - text.push_str(&nested.text); - text.push(','); - defs.extend(nested.defs.into_iter()); - refs.extend(nested.refs.into_iter()); - } - text.push(')'); - if let hir::FnRetTy::Return(ref t) = f.decl.output { - text.push_str(" -> "); - let nested = t.make(offset + text.len(), None, scx)?; - text.push_str(&nested.text); - text.push(','); - defs.extend(nested.defs.into_iter()); - refs.extend(nested.refs.into_iter()); - } - - Ok(Signature { text, defs, refs }) - } - hir::TyKind::Path(hir::QPath::Resolved(None, ref path)) => path.make(offset, id, scx), - hir::TyKind::Path(hir::QPath::Resolved(Some(ref qself), ref path)) => { - let nested_ty = qself.make(offset + 1, id, scx)?; - let prefix = format!( - "<{} as {}>::", - nested_ty.text, - path_segment_to_string(&path.segments[0]) - ); - - let name = path_segment_to_string(path.segments.last().ok_or("Bad path")?); - let res = scx.get_path_res(id.ok_or("Missing id for Path")?); - let id = id_from_def_id(res.def_id()); - if path.segments.len() == 2 { - let start = offset + prefix.len(); - let end = start + name.len(); - - Ok(Signature { - text: prefix + &name, - defs: vec![], - refs: vec![SigElement { id, start, end }], - }) - } else { - let start = offset + prefix.len() + 5; - let end = start + name.len(); - // FIXME should put the proper path in there, not ellipsis. - Ok(Signature { - text: prefix + "...::" + &name, - defs: vec![], - refs: vec![SigElement { id, start, end }], - }) - } - } - hir::TyKind::Path(hir::QPath::TypeRelative(ty, segment)) => { - let nested_ty = ty.make(offset + 1, id, scx)?; - let prefix = format!("<{}>::", nested_ty.text); - - let name = path_segment_to_string(segment); - let res = scx.get_path_res(id.ok_or("Missing id for Path")?); - let id = id_from_def_id(res.def_id()); - - let start = offset + prefix.len(); - let end = start + name.len(); - Ok(Signature { - text: prefix + &name, - defs: vec![], - refs: vec![SigElement { id, start, end }], - }) - } - hir::TyKind::Path(hir::QPath::LangItem(lang_item, _, _)) => { - Ok(text_sig(format!("#[lang = \"{}\"]", lang_item.name()))) - } - hir::TyKind::TraitObject(bounds, ..) => { - // FIXME recurse into bounds - let bounds: Vec<hir::GenericBound<'_>> = bounds - .iter() - .map(|hir::PolyTraitRef { bound_generic_params, trait_ref, span }| { - hir::GenericBound::Trait( - hir::PolyTraitRef { - bound_generic_params, - trait_ref: hir::TraitRef { - path: trait_ref.path, - hir_ref_id: trait_ref.hir_ref_id, - }, - span: *span, - }, - hir::TraitBoundModifier::None, - ) - }) - .collect(); - let nested = bounds_to_string(&bounds); - Ok(text_sig(nested)) - } - hir::TyKind::Array(ref ty, ref length) => { - let nested_ty = ty.make(offset + 1, id, scx)?; - let expr = id_to_string(&scx.tcx.hir(), length.hir_id()).replace('\n', " "); - let text = format!("[{}; {}]", nested_ty.text, expr); - Ok(replace_text(nested_ty, text)) - } - hir::TyKind::OpaqueDef(item_id, _, _) => { - let item = scx.tcx.hir().item(item_id); - item.make(offset, Some(item_id.hir_id()), scx) - } - hir::TyKind::Typeof(_) | hir::TyKind::Infer | hir::TyKind::Err => Err("Ty"), - } - } -} - -impl<'hir> Sig for hir::Item<'hir> { - fn make(&self, offset: usize, _parent_id: Option<hir::HirId>, scx: &SaveContext<'_>) -> Result { - let id = Some(self.hir_id()); - - match self.kind { - hir::ItemKind::Static(ref ty, m, ref body) => { - let mut text = "static ".to_owned(); - if m.is_mut() { - text.push_str("mut "); - } - let name = self.ident.to_string(); - let defs = vec![SigElement { - id: id_from_def_id(self.owner_id.to_def_id()), - start: offset + text.len(), - end: offset + text.len() + name.len(), - }]; - text.push_str(&name); - text.push_str(": "); - - let ty = ty.make(offset + text.len(), id, scx)?; - text.push_str(&ty.text); - - text.push_str(" = "); - let expr = id_to_string(&scx.tcx.hir(), body.hir_id).replace('\n', " "); - text.push_str(&expr); - - text.push(';'); - - Ok(extend_sig(ty, text, defs, vec![])) - } - hir::ItemKind::Const(ref ty, ref body) => { - let mut text = "const ".to_owned(); - let name = self.ident.to_string(); - let defs = vec![SigElement { - id: id_from_def_id(self.owner_id.to_def_id()), - start: offset + text.len(), - end: offset + text.len() + name.len(), - }]; - text.push_str(&name); - text.push_str(": "); - - let ty = ty.make(offset + text.len(), id, scx)?; - text.push_str(&ty.text); - - text.push_str(" = "); - let expr = id_to_string(&scx.tcx.hir(), body.hir_id).replace('\n', " "); - text.push_str(&expr); - - text.push(';'); - - Ok(extend_sig(ty, text, defs, vec![])) - } - hir::ItemKind::Fn(hir::FnSig { ref decl, header, span: _ }, ref generics, _) => { - let mut text = String::new(); - if let hir::Constness::Const = header.constness { - text.push_str("const "); - } - if hir::IsAsync::Async == header.asyncness { - text.push_str("async "); - } - if let hir::Unsafety::Unsafe = header.unsafety { - text.push_str("unsafe "); - } - text.push_str("fn "); - - let mut sig = - name_and_generics(text, offset, generics, self.hir_id(), self.ident, scx)?; - - sig.text.push('('); - for i in decl.inputs { - // FIXME should descend into patterns to add defs. - sig.text.push_str(": "); - let nested = i.make(offset + sig.text.len(), Some(i.hir_id), scx)?; - sig.text.push_str(&nested.text); - sig.text.push(','); - sig.defs.extend(nested.defs.into_iter()); - sig.refs.extend(nested.refs.into_iter()); - } - sig.text.push(')'); - - if let hir::FnRetTy::Return(ref t) = decl.output { - sig.text.push_str(" -> "); - let nested = t.make(offset + sig.text.len(), None, scx)?; - sig.text.push_str(&nested.text); - sig.defs.extend(nested.defs.into_iter()); - sig.refs.extend(nested.refs.into_iter()); - } - sig.text.push_str(" {}"); - - Ok(sig) - } - hir::ItemKind::Macro(..) => { - let mut text = "macro".to_owned(); - let name = self.ident.to_string(); - text.push_str(&name); - text.push_str(&"! {}"); - - Ok(text_sig(text)) - } - hir::ItemKind::Mod(ref _mod) => { - let mut text = "mod ".to_owned(); - let name = self.ident.to_string(); - let defs = vec![SigElement { - id: id_from_def_id(self.owner_id.to_def_id()), - start: offset + text.len(), - end: offset + text.len() + name.len(), - }]; - text.push_str(&name); - // Could be either `mod foo;` or `mod foo { ... }`, but we'll just pick one. - text.push(';'); - - Ok(Signature { text, defs, refs: vec![] }) - } - hir::ItemKind::TyAlias(ref ty, ref generics) => { - let text = "type ".to_owned(); - let mut sig = - name_and_generics(text, offset, generics, self.hir_id(), self.ident, scx)?; - - sig.text.push_str(" = "); - let ty = ty.make(offset + sig.text.len(), id, scx)?; - sig.text.push_str(&ty.text); - sig.text.push(';'); - - Ok(merge_sigs(sig.text.clone(), vec![sig, ty])) - } - hir::ItemKind::Enum(_, ref generics) => { - let text = "enum ".to_owned(); - let mut sig = - name_and_generics(text, offset, generics, self.hir_id(), self.ident, scx)?; - sig.text.push_str(" {}"); - Ok(sig) - } - hir::ItemKind::Struct(_, ref generics) => { - let text = "struct ".to_owned(); - let mut sig = - name_and_generics(text, offset, generics, self.hir_id(), self.ident, scx)?; - sig.text.push_str(" {}"); - Ok(sig) - } - hir::ItemKind::Union(_, ref generics) => { - let text = "union ".to_owned(); - let mut sig = - name_and_generics(text, offset, generics, self.hir_id(), self.ident, scx)?; - sig.text.push_str(" {}"); - Ok(sig) - } - hir::ItemKind::Trait(is_auto, unsafety, ref generics, bounds, _) => { - let mut text = String::new(); - - if is_auto == hir::IsAuto::Yes { - text.push_str("auto "); - } - - if let hir::Unsafety::Unsafe = unsafety { - text.push_str("unsafe "); - } - text.push_str("trait "); - let mut sig = - name_and_generics(text, offset, generics, self.hir_id(), self.ident, scx)?; - - if !bounds.is_empty() { - sig.text.push_str(": "); - sig.text.push_str(&bounds_to_string(bounds)); - } - // FIXME where clause - sig.text.push_str(" {}"); - - Ok(sig) - } - hir::ItemKind::TraitAlias(ref generics, bounds) => { - let mut text = String::new(); - text.push_str("trait "); - let mut sig = - name_and_generics(text, offset, generics, self.hir_id(), self.ident, scx)?; - - if !bounds.is_empty() { - sig.text.push_str(" = "); - sig.text.push_str(&bounds_to_string(bounds)); - } - // FIXME where clause - sig.text.push(';'); - - Ok(sig) - } - hir::ItemKind::Impl(hir::Impl { - unsafety, - polarity, - defaultness, - defaultness_span: _, - constness, - ref generics, - ref of_trait, - ref self_ty, - items: _, - }) => { - let mut text = String::new(); - if let hir::Defaultness::Default { .. } = defaultness { - text.push_str("default "); - } - if let hir::Unsafety::Unsafe = unsafety { - text.push_str("unsafe "); - } - text.push_str("impl"); - if let hir::Constness::Const = constness { - text.push_str(" const"); - } - - let generics_sig = generics.make(offset + text.len(), id, scx)?; - text.push_str(&generics_sig.text); - - text.push(' '); - - let trait_sig = if let Some(ref t) = *of_trait { - if let hir::ImplPolarity::Negative(_) = polarity { - text.push('!'); - } - let trait_sig = t.path.make(offset + text.len(), id, scx)?; - text.push_str(&trait_sig.text); - text.push_str(" for "); - trait_sig - } else { - text_sig(String::new()) - }; - - let ty_sig = self_ty.make(offset + text.len(), id, scx)?; - text.push_str(&ty_sig.text); - - text.push_str(" {}"); - - Ok(merge_sigs(text, vec![generics_sig, trait_sig, ty_sig])) - - // FIXME where clause - } - hir::ItemKind::ForeignMod { .. } => Err("extern mod"), - hir::ItemKind::GlobalAsm(_) => Err("global asm"), - hir::ItemKind::ExternCrate(_) => Err("extern crate"), - hir::ItemKind::OpaqueTy(ref opaque) => { - if opaque.in_trait { - Err("opaque type in trait") - } else { - Err("opaque type") - } - } - // FIXME should implement this (e.g., pub use). - hir::ItemKind::Use(..) => Err("import"), - } - } -} - -impl<'hir> Sig for hir::Path<'hir> { - fn make(&self, offset: usize, id: Option<hir::HirId>, scx: &SaveContext<'_>) -> Result { - let res = scx.get_path_res(id.ok_or("Missing id for Path")?); - - let (name, start, end) = match res { - Res::PrimTy(..) | Res::SelfTyParam { .. } | Res::SelfTyAlias { .. } | Res::Err => { - return Ok(Signature { text: path_to_string(self), defs: vec![], refs: vec![] }); - } - Res::Def(DefKind::AssocConst | DefKind::Variant | DefKind::Ctor(..), _) => { - let len = self.segments.len(); - if len < 2 { - return Err("Bad path"); - } - // FIXME: really we should descend into the generics here and add SigElements for - // them. - // FIXME: would be nice to have a def for the first path segment. - let seg1 = path_segment_to_string(&self.segments[len - 2]); - let seg2 = path_segment_to_string(&self.segments[len - 1]); - let start = offset + seg1.len() + 2; - (format!("{}::{}", seg1, seg2), start, start + seg2.len()) - } - _ => { - let name = path_segment_to_string(self.segments.last().ok_or("Bad path")?); - let end = offset + name.len(); - (name, offset, end) - } - }; - - let id = id_from_def_id(res.def_id()); - Ok(Signature { text: name, defs: vec![], refs: vec![SigElement { id, start, end }] }) - } -} - -// This does not cover the where clause, which must be processed separately. -impl<'hir> Sig for hir::Generics<'hir> { - fn make(&self, offset: usize, _parent_id: Option<hir::HirId>, scx: &SaveContext<'_>) -> Result { - if self.params.is_empty() { - return Ok(text_sig(String::new())); - } - - let mut text = "<".to_owned(); - - let mut defs = Vec::with_capacity(self.params.len()); - for param in self.params { - let mut param_text = String::new(); - if let hir::GenericParamKind::Const { .. } = param.kind { - param_text.push_str("const "); - } - param_text.push_str(param.name.ident().as_str()); - defs.push(SigElement { - id: id_from_hir_id(param.hir_id, scx), - start: offset + text.len(), - end: offset + text.len() + param_text.as_str().len(), - }); - if let hir::GenericParamKind::Const { ref ty, default } = param.kind { - param_text.push_str(": "); - param_text.push_str(&ty_to_string(&ty)); - if let Some(default) = default { - param_text.push_str(" = "); - param_text.push_str(&id_to_string(&scx.tcx.hir(), default.hir_id)); - } - } - text.push_str(¶m_text); - text.push(','); - } - - text.push('>'); - Ok(Signature { text, defs, refs: vec![] }) - } -} - -impl<'hir> Sig for hir::FieldDef<'hir> { - fn make(&self, offset: usize, _parent_id: Option<hir::HirId>, scx: &SaveContext<'_>) -> Result { - let mut text = String::new(); - - text.push_str(&self.ident.to_string()); - let defs = Some(SigElement { - id: id_from_hir_id(self.hir_id, scx), - start: offset, - end: offset + text.len(), - }); - text.push_str(": "); - - let mut ty_sig = self.ty.make(offset + text.len(), Some(self.hir_id), scx)?; - text.push_str(&ty_sig.text); - ty_sig.text = text; - ty_sig.defs.extend(defs.into_iter()); - Ok(ty_sig) - } -} - -impl<'hir> Sig for hir::Variant<'hir> { - fn make(&self, offset: usize, parent_id: Option<hir::HirId>, scx: &SaveContext<'_>) -> Result { - let mut text = self.ident.to_string(); - match self.data { - hir::VariantData::Struct(fields, r) => { - let id = parent_id.ok_or("Missing id for Variant's parent")?; - let name_def = SigElement { - id: id_from_hir_id(id, scx), - start: offset, - end: offset + text.len(), - }; - text.push_str(" { "); - let mut defs = vec![name_def]; - let mut refs = vec![]; - if r { - text.push_str("/* parse error */ "); - } else { - for f in fields { - let field_sig = f.make(offset + text.len(), Some(id), scx)?; - text.push_str(&field_sig.text); - text.push_str(", "); - defs.extend(field_sig.defs.into_iter()); - refs.extend(field_sig.refs.into_iter()); - } - } - text.push('}'); - Ok(Signature { text, defs, refs }) - } - hir::VariantData::Tuple(fields, id, _) => { - let name_def = SigElement { - id: id_from_hir_id(id, scx), - start: offset, - end: offset + text.len(), - }; - text.push('('); - let mut defs = vec![name_def]; - let mut refs = vec![]; - for f in fields { - let field_sig = f.make(offset + text.len(), Some(id), scx)?; - text.push_str(&field_sig.text); - text.push_str(", "); - defs.extend(field_sig.defs.into_iter()); - refs.extend(field_sig.refs.into_iter()); - } - text.push(')'); - Ok(Signature { text, defs, refs }) - } - hir::VariantData::Unit(id, _) => { - let name_def = SigElement { - id: id_from_hir_id(id, scx), - start: offset, - end: offset + text.len(), - }; - Ok(Signature { text, defs: vec![name_def], refs: vec![] }) - } - } - } -} - -impl<'hir> Sig for hir::ForeignItem<'hir> { - fn make(&self, offset: usize, _parent_id: Option<hir::HirId>, scx: &SaveContext<'_>) -> Result { - let id = Some(self.hir_id()); - match self.kind { - hir::ForeignItemKind::Fn(decl, _, ref generics) => { - let mut text = String::new(); - text.push_str("fn "); - - let mut sig = - name_and_generics(text, offset, generics, self.hir_id(), self.ident, scx)?; - - sig.text.push('('); - for i in decl.inputs { - sig.text.push_str(": "); - let nested = i.make(offset + sig.text.len(), Some(i.hir_id), scx)?; - sig.text.push_str(&nested.text); - sig.text.push(','); - sig.defs.extend(nested.defs.into_iter()); - sig.refs.extend(nested.refs.into_iter()); - } - sig.text.push(')'); - - if let hir::FnRetTy::Return(ref t) = decl.output { - sig.text.push_str(" -> "); - let nested = t.make(offset + sig.text.len(), None, scx)?; - sig.text.push_str(&nested.text); - sig.defs.extend(nested.defs.into_iter()); - sig.refs.extend(nested.refs.into_iter()); - } - sig.text.push(';'); - - Ok(sig) - } - hir::ForeignItemKind::Static(ref ty, m) => { - let mut text = "static ".to_owned(); - if m == Mutability::Mut { - text.push_str("mut "); - } - let name = self.ident.to_string(); - let defs = vec![SigElement { - id: id_from_def_id(self.owner_id.to_def_id()), - start: offset + text.len(), - end: offset + text.len() + name.len(), - }]; - text.push_str(&name); - text.push_str(": "); - - let ty_sig = ty.make(offset + text.len(), id, scx)?; - text.push(';'); - - Ok(extend_sig(ty_sig, text, defs, vec![])) - } - hir::ForeignItemKind::Type => { - let mut text = "type ".to_owned(); - let name = self.ident.to_string(); - let defs = vec![SigElement { - id: id_from_def_id(self.owner_id.to_def_id()), - start: offset + text.len(), - end: offset + text.len() + name.len(), - }]; - text.push_str(&name); - text.push(';'); - - Ok(Signature { text, defs, refs: vec![] }) - } - } - } -} - -fn name_and_generics( - mut text: String, - offset: usize, - generics: &hir::Generics<'_>, - id: hir::HirId, - name: Ident, - scx: &SaveContext<'_>, -) -> Result { - let name = name.to_string(); - let def = SigElement { - id: id_from_hir_id(id, scx), - start: offset + text.len(), - end: offset + text.len() + name.len(), - }; - text.push_str(&name); - let generics: Signature = generics.make(offset + text.len(), Some(id), scx)?; - // FIXME where clause - let text = format!("{}{}", text, generics.text); - Ok(extend_sig(generics, text, vec![def], vec![])) -} - -fn make_assoc_type_signature( - id: hir::HirId, - ident: Ident, - bounds: Option<hir::GenericBounds<'_>>, - default: Option<&hir::Ty<'_>>, - scx: &SaveContext<'_>, -) -> Result { - let mut text = "type ".to_owned(); - let name = ident.to_string(); - let mut defs = vec![SigElement { - id: id_from_hir_id(id, scx), - start: text.len(), - end: text.len() + name.len(), - }]; - let mut refs = vec![]; - text.push_str(&name); - if let Some(bounds) = bounds { - text.push_str(": "); - // FIXME should descend into bounds - text.push_str(&bounds_to_string(bounds)); - } - if let Some(default) = default { - text.push_str(" = "); - let ty_sig = default.make(text.len(), Some(id), scx)?; - text.push_str(&ty_sig.text); - defs.extend(ty_sig.defs.into_iter()); - refs.extend(ty_sig.refs.into_iter()); - } - text.push(';'); - Ok(Signature { text, defs, refs }) -} - -fn make_assoc_const_signature( - id: hir::HirId, - ident: Symbol, - ty: &hir::Ty<'_>, - default: Option<&hir::Expr<'_>>, - scx: &SaveContext<'_>, -) -> Result { - let mut text = "const ".to_owned(); - let name = ident.to_string(); - let mut defs = vec![SigElement { - id: id_from_hir_id(id, scx), - start: text.len(), - end: text.len() + name.len(), - }]; - let mut refs = vec![]; - text.push_str(&name); - text.push_str(": "); - - let ty_sig = ty.make(text.len(), Some(id), scx)?; - text.push_str(&ty_sig.text); - defs.extend(ty_sig.defs.into_iter()); - refs.extend(ty_sig.refs.into_iter()); - - if let Some(default) = default { - text.push_str(" = "); - text.push_str(&id_to_string(&scx.tcx.hir(), default.hir_id)); - } - text.push(';'); - Ok(Signature { text, defs, refs }) -} - -fn make_method_signature( - id: hir::HirId, - ident: Ident, - generics: &hir::Generics<'_>, - m: &hir::FnSig<'_>, - scx: &SaveContext<'_>, -) -> Result { - // FIXME code dup with function signature - let mut text = String::new(); - if let hir::Constness::Const = m.header.constness { - text.push_str("const "); - } - if hir::IsAsync::Async == m.header.asyncness { - text.push_str("async "); - } - if let hir::Unsafety::Unsafe = m.header.unsafety { - text.push_str("unsafe "); - } - text.push_str("fn "); - - let mut sig = name_and_generics(text, 0, generics, id, ident, scx)?; - - sig.text.push('('); - for i in m.decl.inputs { - sig.text.push_str(": "); - let nested = i.make(sig.text.len(), Some(i.hir_id), scx)?; - sig.text.push_str(&nested.text); - sig.text.push(','); - sig.defs.extend(nested.defs.into_iter()); - sig.refs.extend(nested.refs.into_iter()); - } - sig.text.push(')'); - - if let hir::FnRetTy::Return(ref t) = m.decl.output { - sig.text.push_str(" -> "); - let nested = t.make(sig.text.len(), None, scx)?; - sig.text.push_str(&nested.text); - sig.defs.extend(nested.defs.into_iter()); - sig.refs.extend(nested.refs.into_iter()); - } - sig.text.push_str(" {}"); - - Ok(sig) -} |