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use hir::def_id::DefId;
use util::nodemap::NodeMap;
use syntax::ast;
use syntax::ext::base::MacroKind;
use hir;
#[derive(Clone, Copy, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
pub enum CtorKind {
Fn,
Const,
Fictive,
}
#[derive(Clone, Copy, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
pub enum Def {
Mod(DefId),
Struct(DefId),
Union(DefId),
Enum(DefId),
Variant(DefId),
Trait(DefId),
TyAlias(DefId),
AssociatedTy(DefId),
PrimTy(hir::PrimTy),
TyParam(DefId),
SelfTy(Option<DefId> , Option<DefId> ),
Fn(DefId),
Const(DefId),
Static(DefId, bool ),
StructCtor(DefId, CtorKind),
VariantCtor(DefId, CtorKind),
Method(DefId),
AssociatedConst(DefId),
Local(DefId),
Upvar(DefId,
usize,
ast::NodeId),
Label(ast::NodeId),
Macro(DefId, MacroKind),
Err,
}
#[derive(Copy, Clone, Debug)]
pub struct PathResolution {
base_def: Def,
unresolved_segments: usize,
}
impl PathResolution {
pub fn new(def: Def) -> Self {
PathResolution { base_def: def, unresolved_segments: 0 }
}
pub fn with_unresolved_segments(def: Def, mut unresolved_segments: usize) -> Self {
if def == Def::Err { unresolved_segments = 0 }
PathResolution { base_def: def, unresolved_segments: unresolved_segments }
}
#[inline]
pub fn base_def(&self) -> Def {
self.base_def
}
#[inline]
pub fn unresolved_segments(&self) -> usize {
self.unresolved_segments
}
pub fn kind_name(&self) -> &'static str {
if self.unresolved_segments != 0 {
"associated item"
} else {
self.base_def.kind_name()
}
}
}
pub type DefMap = NodeMap<PathResolution>;
pub type ExportMap = NodeMap<Vec<Export>>;
#[derive(Copy, Clone, Debug, RustcEncodable, RustcDecodable)]
pub struct Export {
pub name: ast::Name,
pub def: Def,
}
impl CtorKind {
pub fn from_ast(vdata: &ast::VariantData) -> CtorKind {
match *vdata {
ast::VariantData::Tuple(..) => CtorKind::Fn,
ast::VariantData::Unit(..) => CtorKind::Const,
ast::VariantData::Struct(..) => CtorKind::Fictive,
}
}
pub fn from_hir(vdata: &hir::VariantData) -> CtorKind {
match *vdata {
hir::VariantData::Tuple(..) => CtorKind::Fn,
hir::VariantData::Unit(..) => CtorKind::Const,
hir::VariantData::Struct(..) => CtorKind::Fictive,
}
}
}
impl Def {
pub fn def_id(&self) -> DefId {
match *self {
Def::Fn(id) | Def::Mod(id) | Def::Static(id, _) |
Def::Variant(id) | Def::VariantCtor(id, ..) | Def::Enum(id) | Def::TyAlias(id) |
Def::AssociatedTy(id) | Def::TyParam(id) | Def::Struct(id) | Def::StructCtor(id, ..) |
Def::Union(id) | Def::Trait(id) | Def::Method(id) | Def::Const(id) |
Def::AssociatedConst(id) | Def::Local(id) | Def::Upvar(id, ..) | Def::Macro(id, ..) => {
id
}
Def::Label(..) |
Def::PrimTy(..) |
Def::SelfTy(..) |
Def::Err => {
bug!("attempted .def_id() on invalid def: {:?}", self)
}
}
}
pub fn kind_name(&self) -> &'static str {
match *self {
Def::Fn(..) => "function",
Def::Mod(..) => "module",
Def::Static(..) => "static",
Def::Variant(..) => "variant",
Def::VariantCtor(.., CtorKind::Fn) => "tuple variant",
Def::VariantCtor(.., CtorKind::Const) => "unit variant",
Def::VariantCtor(.., CtorKind::Fictive) => "struct variant",
Def::Enum(..) => "enum",
Def::TyAlias(..) => "type alias",
Def::AssociatedTy(..) => "associated type",
Def::Struct(..) => "struct",
Def::StructCtor(.., CtorKind::Fn) => "tuple struct",
Def::StructCtor(.., CtorKind::Const) => "unit struct",
Def::StructCtor(.., CtorKind::Fictive) => bug!("impossible struct constructor"),
Def::Union(..) => "union",
Def::Trait(..) => "trait",
Def::Method(..) => "method",
Def::Const(..) => "constant",
Def::AssociatedConst(..) => "associated constant",
Def::TyParam(..) => "type parameter",
Def::PrimTy(..) => "builtin type",
Def::Local(..) => "local variable",
Def::Upvar(..) => "closure capture",
Def::Label(..) => "label",
Def::SelfTy(..) => "self type",
Def::Macro(..) => "macro",
Def::Err => "unresolved item",
}
}
}