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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use middle::subst::ParamSpace;
use syntax::ast;
use syntax::ast_util::local_def;
#[deriving(Clone, PartialEq, Eq, Encodable, Decodable, Hash, Show)]
pub enum Def {
DefFn(ast::DefId, ast::FnStyle, bool /* is_ctor */),
DefStaticMethod(/* method */ ast::DefId, MethodProvenance, ast::FnStyle),
DefSelfTy(/* trait id */ ast::NodeId),
DefMod(ast::DefId),
DefForeignMod(ast::DefId),
DefStatic(ast::DefId, bool /* is_mutbl */),
DefLocal(ast::NodeId),
DefVariant(ast::DefId /* enum */, ast::DefId /* variant */, bool /* is_structure */),
DefTy(ast::DefId, bool /* is_enum */),
DefAssociatedTy(ast::DefId),
DefTrait(ast::DefId),
DefPrimTy(ast::PrimTy),
DefTyParam(ParamSpace, ast::DefId, uint),
DefUse(ast::DefId),
DefUpvar(ast::NodeId, // id of closed over local
ast::NodeId, // expr node that creates the closure
ast::NodeId), // block node for the closest enclosing proc
// or unboxed closure, DUMMY_NODE_ID otherwise
/// Note that if it's a tuple struct's definition, the node id of the ast::DefId
/// may either refer to the item definition's id or the StructDef.ctor_id.
///
/// The cases that I have encountered so far are (this is not exhaustive):
/// - If it's a ty_path referring to some tuple struct, then DefMap maps
/// it to a def whose id is the item definition's id.
/// - If it's an ExprPath referring to some tuple struct, then DefMap maps
/// it to a def whose id is the StructDef.ctor_id.
DefStruct(ast::DefId),
DefTyParamBinder(ast::NodeId), /* struct, impl or trait with ty params */
DefRegion(ast::NodeId),
DefLabel(ast::NodeId),
DefMethod(ast::DefId /* method */, Option<ast::DefId> /* trait */),
}
#[deriving(Clone, PartialEq, Eq, Encodable, Decodable, Hash, Show)]
pub enum MethodProvenance {
FromTrait(ast::DefId),
FromImpl(ast::DefId),
}
impl Def {
pub fn def_id(&self) -> ast::DefId {
match *self {
DefFn(id, _, _) | DefStaticMethod(id, _, _) | DefMod(id) |
DefForeignMod(id) | DefStatic(id, _) |
DefVariant(_, id, _) | DefTy(id, _) | DefAssociatedTy(id) |
DefTyParam(_, id, _) | DefUse(id) | DefStruct(id) | DefTrait(id) |
DefMethod(id, _) => {
id
}
DefLocal(id) |
DefSelfTy(id) |
DefUpvar(id, _, _) |
DefRegion(id) |
DefTyParamBinder(id) |
DefLabel(id) => {
local_def(id)
}
DefPrimTy(_) => fail!()
}
}
pub fn variant_def_ids(&self) -> Option<(ast::DefId, ast::DefId)> {
match *self {
DefVariant(enum_id, var_id, _) => {
Some((enum_id, var_id))
}
_ => None
}
}
}
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