// Copyright 2012-2014 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 or the MIT license // , at your // option. This file may not be copied, modified, or distributed // except according to those terms. #![allow(non_camel_case_types)] // FIXME: remove this after snapshot, and Results are handled #![allow(unused_must_use)] use c = metadata::common; use cstore = metadata::cstore; use driver::session::Session; use metadata::decoder; use middle::def; use e = metadata::encoder; use middle::freevars::freevar_entry; use middle::region; use metadata::tydecode; use metadata::tydecode::{DefIdSource, NominalType, TypeWithId, TypeParameter, RegionParameter}; use metadata::tyencode; use middle::subst; use middle::subst::VecPerParamSpace; use middle::typeck::{MethodCall, MethodCallee, MethodOrigin}; use middle::{ty, typeck}; use util::ppaux::ty_to_str; use syntax::{ast, ast_map, ast_util, codemap, fold}; use syntax::codemap::Span; use syntax::fold::Folder; use syntax::parse::token; use syntax; use libc; use std::io::Seek; use std::io::MemWriter; use std::mem; use std::gc::GC; use serialize::ebml::reader; use serialize::ebml; use serialize; use serialize::{Encoder, Encodable, EncoderHelpers, DecoderHelpers}; use serialize::{Decoder, Decodable}; use writer = serialize::ebml::writer; #[cfg(test)] use syntax::parse; #[cfg(test)] use syntax::print::pprust; #[cfg(test)] use std::gc::Gc; struct DecodeContext<'a> { cdata: &'a cstore::crate_metadata, tcx: &'a ty::ctxt, } struct ExtendedDecodeContext<'a> { dcx: &'a DecodeContext<'a>, from_id_range: ast_util::IdRange, to_id_range: ast_util::IdRange } trait tr { fn tr(&self, xcx: &ExtendedDecodeContext) -> Self; } trait tr_intern { fn tr_intern(&self, xcx: &ExtendedDecodeContext) -> ast::DefId; } pub type Encoder<'a> = writer::Encoder<'a, MemWriter>; // ______________________________________________________________________ // Top-level methods. pub fn encode_inlined_item(ecx: &e::EncodeContext, ebml_w: &mut Encoder, ii: e::InlinedItemRef) { let id = match ii { e::IIItemRef(i) => i.id, e::IIForeignRef(i) => i.id, e::IIMethodRef(_, _, m) => m.id, }; debug!("> Encoding inlined item: {} ({})", ecx.tcx.map.path_to_str(id), ebml_w.writer.tell()); let ii = simplify_ast(ii); let id_range = ast_util::compute_id_range_for_inlined_item(&ii); ebml_w.start_tag(c::tag_ast as uint); id_range.encode(ebml_w); encode_ast(ebml_w, ii); encode_side_tables_for_ii(ecx, ebml_w, &ii); ebml_w.end_tag(); debug!("< Encoded inlined fn: {} ({})", ecx.tcx.map.path_to_str(id), ebml_w.writer.tell()); } pub fn decode_inlined_item(cdata: &cstore::crate_metadata, tcx: &ty::ctxt, path: Vec, par_doc: ebml::Doc) -> Result> { let dcx = &DecodeContext { cdata: cdata, tcx: tcx, }; match par_doc.opt_child(c::tag_ast) { None => Err(path), Some(ast_doc) => { let mut path_as_str = None; debug!("> Decoding inlined fn: {}::?", { // Do an Option dance to use the path after it is moved below. let s = ast_map::path_to_str(ast_map::Values(path.iter())); path_as_str = Some(s); path_as_str.as_ref().map(|x| x.as_slice()) }); let mut ast_dsr = reader::Decoder::new(ast_doc); let from_id_range = Decodable::decode(&mut ast_dsr).unwrap(); let to_id_range = reserve_id_range(&dcx.tcx.sess, from_id_range); let xcx = &ExtendedDecodeContext { dcx: dcx, from_id_range: from_id_range, to_id_range: to_id_range }; let raw_ii = decode_ast(ast_doc); let ii = renumber_and_map_ast(xcx, &dcx.tcx.map, path, raw_ii); let ident = match ii { ast::IIItem(i) => i.ident, ast::IIForeign(i) => i.ident, ast::IIMethod(_, _, m) => m.ident, }; debug!("Fn named: {}", token::get_ident(ident)); debug!("< Decoded inlined fn: {}::{}", path_as_str.unwrap(), token::get_ident(ident)); region::resolve_inlined_item(&tcx.sess, &tcx.region_maps, &ii); decode_side_tables(xcx, ast_doc); match ii { ast::IIItem(i) => { debug!(">>> DECODED ITEM >>>\n{}\n<<< DECODED ITEM <<<", syntax::print::pprust::item_to_str(&*i)); } _ => { } } Ok(ii) } } } // ______________________________________________________________________ // Enumerating the IDs which appear in an AST fn reserve_id_range(sess: &Session, from_id_range: ast_util::IdRange) -> ast_util::IdRange { // Handle the case of an empty range: if from_id_range.empty() { return from_id_range; } let cnt = from_id_range.max - from_id_range.min; let to_id_min = sess.reserve_node_ids(cnt); let to_id_max = to_id_min + cnt; ast_util::IdRange { min: to_id_min, max: to_id_max } } impl<'a> ExtendedDecodeContext<'a> { pub fn tr_id(&self, id: ast::NodeId) -> ast::NodeId { /*! * Translates an internal id, meaning a node id that is known * to refer to some part of the item currently being inlined, * such as a local variable or argument. All naked node-ids * that appear in types have this property, since if something * might refer to an external item we would use a def-id to * allow for the possibility that the item resides in another * crate. */ // from_id_range should be non-empty assert!(!self.from_id_range.empty()); (id - self.from_id_range.min + self.to_id_range.min) } pub fn tr_def_id(&self, did: ast::DefId) -> ast::DefId { /*! * Translates an EXTERNAL def-id, converting the crate number * from the one used in the encoded data to the current crate * numbers.. By external, I mean that it be translated to a * reference to the item in its original crate, as opposed to * being translated to a reference to the inlined version of * the item. This is typically, but not always, what you * want, because most def-ids refer to external things like * types or other fns that may or may not be inlined. Note * that even when the inlined function is referencing itself * recursively, we would want `tr_def_id` for that * reference--- conceptually the function calls the original, * non-inlined version, and trans deals with linking that * recursive call to the inlined copy. * * However, there are a *few* cases where def-ids are used but * we know that the thing being referenced is in fact *internal* * to the item being inlined. In those cases, you should use * `tr_intern_def_id()` below. */ decoder::translate_def_id(self.dcx.cdata, did) } pub fn tr_intern_def_id(&self, did: ast::DefId) -> ast::DefId { /*! * Translates an INTERNAL def-id, meaning a def-id that is * known to refer to some part of the item currently being * inlined. In that case, we want to convert the def-id to * refer to the current crate and to the new, inlined node-id. */ assert_eq!(did.krate, ast::LOCAL_CRATE); ast::DefId { krate: ast::LOCAL_CRATE, node: self.tr_id(did.node) } } pub fn tr_span(&self, _span: Span) -> Span { codemap::DUMMY_SP // FIXME (#1972): handle span properly } } impl tr_intern for ast::DefId { fn tr_intern(&self, xcx: &ExtendedDecodeContext) -> ast::DefId { xcx.tr_intern_def_id(*self) } } impl tr for ast::DefId { fn tr(&self, xcx: &ExtendedDecodeContext) -> ast::DefId { xcx.tr_def_id(*self) } } impl tr for Option { fn tr(&self, xcx: &ExtendedDecodeContext) -> Option { self.map(|d| xcx.tr_def_id(d)) } } impl tr for Span { fn tr(&self, xcx: &ExtendedDecodeContext) -> Span { xcx.tr_span(*self) } } trait def_id_encoder_helpers { fn emit_def_id(&mut self, did: ast::DefId); } impl, E> def_id_encoder_helpers for S { fn emit_def_id(&mut self, did: ast::DefId) { did.encode(self).ok().unwrap() } } trait def_id_decoder_helpers { fn read_def_id(&mut self, xcx: &ExtendedDecodeContext) -> ast::DefId; fn read_def_id_noxcx(&mut self, cdata: &cstore::crate_metadata) -> ast::DefId; } impl, E> def_id_decoder_helpers for D { fn read_def_id(&mut self, xcx: &ExtendedDecodeContext) -> ast::DefId { let did: ast::DefId = Decodable::decode(self).ok().unwrap(); did.tr(xcx) } fn read_def_id_noxcx(&mut self, cdata: &cstore::crate_metadata) -> ast::DefId { let did: ast::DefId = Decodable::decode(self).ok().unwrap(); decoder::translate_def_id(cdata, did) } } // ______________________________________________________________________ // Encoding and decoding the AST itself // // The hard work is done by an autogenerated module astencode_gen. To // regenerate astencode_gen, run src/etc/gen-astencode. It will // replace astencode_gen with a dummy file and regenerate its // contents. If you get compile errors, the dummy file // remains---resolve the errors and then rerun astencode_gen. // Annoying, I know, but hopefully only temporary. // // When decoding, we have to renumber the AST so that the node ids that // appear within are disjoint from the node ids in our existing ASTs. // We also have to adjust the spans: for now we just insert a dummy span, // but eventually we should add entries to the local codemap as required. fn encode_ast(ebml_w: &mut Encoder, item: ast::InlinedItem) { ebml_w.start_tag(c::tag_tree as uint); item.encode(ebml_w); ebml_w.end_tag(); } struct NestedItemsDropper; impl Folder for NestedItemsDropper { fn fold_block(&mut self, blk: ast::P) -> ast::P { let stmts_sans_items = blk.stmts.iter().filter_map(|stmt| { match stmt.node { ast::StmtExpr(_, _) | ast::StmtSemi(_, _) => Some(*stmt), ast::StmtDecl(decl, _) => { match decl.node { ast::DeclLocal(_) => Some(*stmt), ast::DeclItem(_) => None, } } ast::StmtMac(..) => fail!("unexpanded macro in astencode") } }).collect(); let blk_sans_items = ast::P(ast::Block { view_items: Vec::new(), // I don't know if we need the view_items // here, but it doesn't break tests! stmts: stmts_sans_items, expr: blk.expr, id: blk.id, rules: blk.rules, span: blk.span, }); fold::noop_fold_block(blk_sans_items, self) } } // Produces a simplified copy of the AST which does not include things // that we do not need to or do not want to export. For example, we // do not include any nested items: if these nested items are to be // inlined, their AST will be exported separately (this only makes // sense because, in Rust, nested items are independent except for // their visibility). // // As it happens, trans relies on the fact that we do not export // nested items, as otherwise it would get confused when translating // inlined items. fn simplify_ast(ii: e::InlinedItemRef) -> ast::InlinedItem { let mut fld = NestedItemsDropper; match ii { // HACK we're not dropping items. e::IIItemRef(i) => ast::IIItem(fold::noop_fold_item(i, &mut fld) .expect_one("expected one item")), e::IIMethodRef(d, p, m) => ast::IIMethod(d, p, fold::noop_fold_method(m, &mut fld)), e::IIForeignRef(i) => ast::IIForeign(fold::noop_fold_foreign_item(i, &mut fld)) } } fn decode_ast(par_doc: ebml::Doc) -> ast::InlinedItem { let chi_doc = par_doc.get(c::tag_tree as uint); let mut d = reader::Decoder::new(chi_doc); Decodable::decode(&mut d).unwrap() } struct AstRenumberer<'a> { xcx: &'a ExtendedDecodeContext<'a>, } impl<'a> ast_map::FoldOps for AstRenumberer<'a> { fn new_id(&self, id: ast::NodeId) -> ast::NodeId { if id == ast::DUMMY_NODE_ID { // Used by ast_map to map the NodeInlinedParent. self.xcx.dcx.tcx.sess.next_node_id() } else { self.xcx.tr_id(id) } } fn new_span(&self, span: Span) -> Span { self.xcx.tr_span(span) } } fn renumber_and_map_ast(xcx: &ExtendedDecodeContext, map: &ast_map::Map, path: Vec , ii: ast::InlinedItem) -> ast::InlinedItem { ast_map::map_decoded_item(map, path.move_iter().collect(), AstRenumberer { xcx: xcx }, |fld| { match ii { ast::IIItem(i) => { ast::IIItem(fld.fold_item(i).expect_one("expected one item")) } ast::IIMethod(d, is_provided, m) => { ast::IIMethod(xcx.tr_def_id(d), is_provided, fld.fold_method(m)) } ast::IIForeign(i) => ast::IIForeign(fld.fold_foreign_item(i)) } }) } // ______________________________________________________________________ // Encoding and decoding of ast::def fn decode_def(xcx: &ExtendedDecodeContext, doc: ebml::Doc) -> def::Def { let mut dsr = reader::Decoder::new(doc); let def: def::Def = Decodable::decode(&mut dsr).unwrap(); def.tr(xcx) } impl tr for def::Def { fn tr(&self, xcx: &ExtendedDecodeContext) -> def::Def { match *self { def::DefFn(did, p) => def::DefFn(did.tr(xcx), p), def::DefStaticMethod(did, wrapped_did2, p) => { def::DefStaticMethod(did.tr(xcx), match wrapped_did2 { def::FromTrait(did2) => { def::FromTrait(did2.tr(xcx)) } def::FromImpl(did2) => { def::FromImpl(did2.tr(xcx)) } }, p) } def::DefMethod(did0, did1) => { def::DefMethod(did0.tr(xcx), did1.map(|did1| did1.tr(xcx))) } def::DefSelfTy(nid) => { def::DefSelfTy(xcx.tr_id(nid)) } def::DefMod(did) => { def::DefMod(did.tr(xcx)) } def::DefForeignMod(did) => { def::DefForeignMod(did.tr(xcx)) } def::DefStatic(did, m) => { def::DefStatic(did.tr(xcx), m) } def::DefArg(nid, b) => { def::DefArg(xcx.tr_id(nid), b) } def::DefLocal(nid, b) => { def::DefLocal(xcx.tr_id(nid), b) } def::DefVariant(e_did, v_did, is_s) => { def::DefVariant(e_did.tr(xcx), v_did.tr(xcx), is_s) }, def::DefTrait(did) => def::DefTrait(did.tr(xcx)), def::DefTy(did) => def::DefTy(did.tr(xcx)), def::DefPrimTy(p) => def::DefPrimTy(p), def::DefTyParam(s, did, v) => def::DefTyParam(s, did.tr(xcx), v), def::DefBinding(nid, bm) => def::DefBinding(xcx.tr_id(nid), bm), def::DefUse(did) => def::DefUse(did.tr(xcx)), def::DefUpvar(nid1, def, nid2, nid3) => { def::DefUpvar(xcx.tr_id(nid1), box(GC) (*def).tr(xcx), xcx.tr_id(nid2), xcx.tr_id(nid3)) } def::DefStruct(did) => def::DefStruct(did.tr(xcx)), def::DefRegion(nid) => def::DefRegion(xcx.tr_id(nid)), def::DefTyParamBinder(nid) => { def::DefTyParamBinder(xcx.tr_id(nid)) } def::DefLabel(nid) => def::DefLabel(xcx.tr_id(nid)) } } } // ______________________________________________________________________ // Encoding and decoding of adjustment information impl tr for ty::AutoDerefRef { fn tr(&self, xcx: &ExtendedDecodeContext) -> ty::AutoDerefRef { ty::AutoDerefRef { autoderefs: self.autoderefs, autoref: match self.autoref { Some(ref autoref) => Some(autoref.tr(xcx)), None => None } } } } impl tr for ty::AutoRef { fn tr(&self, xcx: &ExtendedDecodeContext) -> ty::AutoRef { self.map_region(|r| r.tr(xcx)) } } impl tr for ty::Region { fn tr(&self, xcx: &ExtendedDecodeContext) -> ty::Region { match *self { ty::ReLateBound(id, br) => { ty::ReLateBound(xcx.tr_id(id), br.tr(xcx)) } ty::ReEarlyBound(id, space, index, ident) => { ty::ReEarlyBound(xcx.tr_id(id), space, index, ident) } ty::ReScope(id) => { ty::ReScope(xcx.tr_id(id)) } ty::ReEmpty | ty::ReStatic | ty::ReInfer(..) => { *self } ty::ReFree(ref fr) => { ty::ReFree(ty::FreeRegion {scope_id: xcx.tr_id(fr.scope_id), bound_region: fr.bound_region.tr(xcx)}) } } } } impl tr for ty::BoundRegion { fn tr(&self, xcx: &ExtendedDecodeContext) -> ty::BoundRegion { match *self { ty::BrAnon(_) | ty::BrFresh(_) => *self, ty::BrNamed(id, ident) => ty::BrNamed(xcx.tr_def_id(id), ident), } } } impl tr for ty::TraitStore { fn tr(&self, xcx: &ExtendedDecodeContext) -> ty::TraitStore { match *self { ty::RegionTraitStore(r, m) => { ty::RegionTraitStore(r.tr(xcx), m) } ty::UniqTraitStore => ty::UniqTraitStore } } } // ______________________________________________________________________ // Encoding and decoding of freevar information fn encode_freevar_entry(ebml_w: &mut Encoder, fv: &freevar_entry) { (*fv).encode(ebml_w).unwrap(); } trait ebml_decoder_helper { fn read_freevar_entry(&mut self, xcx: &ExtendedDecodeContext) -> freevar_entry; } impl<'a> ebml_decoder_helper for reader::Decoder<'a> { fn read_freevar_entry(&mut self, xcx: &ExtendedDecodeContext) -> freevar_entry { let fv: freevar_entry = Decodable::decode(self).unwrap(); fv.tr(xcx) } } impl tr for freevar_entry { fn tr(&self, xcx: &ExtendedDecodeContext) -> freevar_entry { freevar_entry { def: self.def.tr(xcx), span: self.span.tr(xcx), } } } // ______________________________________________________________________ // Encoding and decoding of MethodCallee trait read_method_callee_helper { fn read_method_callee(&mut self, xcx: &ExtendedDecodeContext) -> (typeck::ExprAdjustment, MethodCallee); } fn encode_method_callee(ecx: &e::EncodeContext, ebml_w: &mut Encoder, adjustment: typeck::ExprAdjustment, method: &MethodCallee) { ebml_w.emit_struct("MethodCallee", 4, |ebml_w| { ebml_w.emit_struct_field("adjustment", 0u, |ebml_w| { adjustment.encode(ebml_w) }); ebml_w.emit_struct_field("origin", 1u, |ebml_w| { method.origin.encode(ebml_w) }); ebml_w.emit_struct_field("ty", 2u, |ebml_w| { Ok(ebml_w.emit_ty(ecx, method.ty)) }); ebml_w.emit_struct_field("substs", 3u, |ebml_w| { Ok(ebml_w.emit_substs(ecx, &method.substs)) }) }).unwrap(); } impl<'a> read_method_callee_helper for reader::Decoder<'a> { fn read_method_callee(&mut self, xcx: &ExtendedDecodeContext) -> (typeck::ExprAdjustment, MethodCallee) { self.read_struct("MethodCallee", 4, |this| { let adjustment = this.read_struct_field("adjustment", 0, |this| { Decodable::decode(this) }).unwrap(); Ok((adjustment, MethodCallee { origin: this.read_struct_field("origin", 1, |this| { let method_origin: MethodOrigin = Decodable::decode(this).unwrap(); Ok(method_origin.tr(xcx)) }).unwrap(), ty: this.read_struct_field("ty", 2, |this| { Ok(this.read_ty(xcx)) }).unwrap(), substs: this.read_struct_field("substs", 3, |this| { Ok(this.read_substs(xcx)) }).unwrap() })) }).unwrap() } } impl tr for MethodOrigin { fn tr(&self, xcx: &ExtendedDecodeContext) -> MethodOrigin { match *self { typeck::MethodStatic(did) => typeck::MethodStatic(did.tr(xcx)), typeck::MethodParam(ref mp) => { typeck::MethodParam( typeck::MethodParam { trait_id: mp.trait_id.tr(xcx), .. *mp } ) } typeck::MethodObject(ref mo) => { typeck::MethodObject( typeck::MethodObject { trait_id: mo.trait_id.tr(xcx), .. *mo } ) } } } } // ______________________________________________________________________ // Encoding and decoding vtable_res fn encode_vtable_res_with_key(ecx: &e::EncodeContext, ebml_w: &mut Encoder, adjustment: typeck::ExprAdjustment, dr: &typeck::vtable_res) { ebml_w.emit_struct("VtableWithKey", 2, |ebml_w| { ebml_w.emit_struct_field("adjustment", 0u, |ebml_w| { adjustment.encode(ebml_w) }); ebml_w.emit_struct_field("vtable_res", 1u, |ebml_w| { Ok(encode_vtable_res(ecx, ebml_w, dr)) }) }).unwrap() } pub fn encode_vtable_res(ecx: &e::EncodeContext, ebml_w: &mut Encoder, dr: &typeck::vtable_res) { // can't autogenerate this code because automatic code of // ty::t doesn't work, and there is no way (atm) to have // hand-written encoding routines combine with auto-generated // ones. perhaps we should fix this. encode_vec_per_param_space( ebml_w, dr, |ebml_w, param_tables| encode_vtable_param_res(ecx, ebml_w, param_tables)) } pub fn encode_vtable_param_res(ecx: &e::EncodeContext, ebml_w: &mut Encoder, param_tables: &typeck::vtable_param_res) { ebml_w.emit_from_vec(param_tables.as_slice(), |ebml_w, vtable_origin| { Ok(encode_vtable_origin(ecx, ebml_w, vtable_origin)) }).unwrap() } pub fn encode_vtable_origin(ecx: &e::EncodeContext, ebml_w: &mut Encoder, vtable_origin: &typeck::vtable_origin) { ebml_w.emit_enum("vtable_origin", |ebml_w| { match *vtable_origin { typeck::vtable_static(def_id, ref substs, ref vtable_res) => { ebml_w.emit_enum_variant("vtable_static", 0u, 3u, |ebml_w| { ebml_w.emit_enum_variant_arg(0u, |ebml_w| { Ok(ebml_w.emit_def_id(def_id)) }); ebml_w.emit_enum_variant_arg(1u, |ebml_w| { Ok(ebml_w.emit_substs(ecx, substs)) }); ebml_w.emit_enum_variant_arg(2u, |ebml_w| { Ok(encode_vtable_res(ecx, ebml_w, vtable_res)) }) }) } typeck::vtable_param(pn, bn) => { ebml_w.emit_enum_variant("vtable_param", 1u, 3u, |ebml_w| { ebml_w.emit_enum_variant_arg(0u, |ebml_w| { pn.encode(ebml_w) }); ebml_w.emit_enum_variant_arg(1u, |ebml_w| { ebml_w.emit_uint(bn) }) }) } typeck::vtable_error => { ebml_w.emit_enum_variant("vtable_error", 2u, 3u, |_ebml_w| { Ok(()) }) } } }).unwrap() } pub trait vtable_decoder_helpers { fn read_vec_per_param_space(&mut self, f: |&mut Self| -> T) -> VecPerParamSpace; fn read_vtable_res_with_key(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> (typeck::ExprAdjustment, typeck::vtable_res); fn read_vtable_res(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> typeck::vtable_res; fn read_vtable_param_res(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> typeck::vtable_param_res; fn read_vtable_origin(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> typeck::vtable_origin; } impl<'a> vtable_decoder_helpers for reader::Decoder<'a> { fn read_vec_per_param_space(&mut self, f: |&mut reader::Decoder<'a>| -> T) -> VecPerParamSpace { let types = self.read_to_vec(|this| Ok(f(this))).unwrap(); let selfs = self.read_to_vec(|this| Ok(f(this))).unwrap(); let fns = self.read_to_vec(|this| Ok(f(this))).unwrap(); VecPerParamSpace::new(types, selfs, fns) } fn read_vtable_res_with_key(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> (typeck::ExprAdjustment, typeck::vtable_res) { self.read_struct("VtableWithKey", 2, |this| { let adjustment = this.read_struct_field("adjustment", 0, |this| { Decodable::decode(this) }).unwrap(); Ok((adjustment, this.read_struct_field("vtable_res", 1, |this| { Ok(this.read_vtable_res(tcx, cdata)) }).unwrap())) }).unwrap() } fn read_vtable_res(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> typeck::vtable_res { self.read_vec_per_param_space( |this| this.read_vtable_param_res(tcx, cdata)) } fn read_vtable_param_res(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> typeck::vtable_param_res { self.read_to_vec(|this| Ok(this.read_vtable_origin(tcx, cdata))) .unwrap().move_iter().collect() } fn read_vtable_origin(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> typeck::vtable_origin { self.read_enum("vtable_origin", |this| { this.read_enum_variant(["vtable_static", "vtable_param", "vtable_error"], |this, i| { Ok(match i { 0 => { typeck::vtable_static( this.read_enum_variant_arg(0u, |this| { Ok(this.read_def_id_noxcx(cdata)) }).unwrap(), this.read_enum_variant_arg(1u, |this| { Ok(this.read_substs_noxcx(tcx, cdata)) }).unwrap(), this.read_enum_variant_arg(2u, |this| { Ok(this.read_vtable_res(tcx, cdata)) }).unwrap() ) } 1 => { typeck::vtable_param( this.read_enum_variant_arg(0u, |this| { Decodable::decode(this) }).unwrap(), this.read_enum_variant_arg(1u, |this| { this.read_uint() }).unwrap() ) } 2 => { typeck::vtable_error } _ => fail!("bad enum variant") }) }) }).unwrap() } } // ___________________________________________________________________________ // fn encode_vec_per_param_space(ebml_w: &mut Encoder, v: &subst::VecPerParamSpace, f: |&mut Encoder, &T|) { for &space in subst::ParamSpace::all().iter() { ebml_w.emit_from_vec(v.get_vec(space).as_slice(), |ebml_w, n| Ok(f(ebml_w, n))).unwrap(); } } // ______________________________________________________________________ // Encoding and decoding the side tables trait get_ty_str_ctxt { fn ty_str_ctxt<'a>(&'a self) -> tyencode::ctxt<'a>; } impl<'a> get_ty_str_ctxt for e::EncodeContext<'a> { fn ty_str_ctxt<'a>(&'a self) -> tyencode::ctxt<'a> { tyencode::ctxt { diag: self.tcx.sess.diagnostic(), ds: e::def_to_str, tcx: self.tcx, abbrevs: &self.type_abbrevs } } } trait ebml_writer_helpers { fn emit_ty(&mut self, ecx: &e::EncodeContext, ty: ty::t); fn emit_tys(&mut self, ecx: &e::EncodeContext, tys: &[ty::t]); fn emit_type_param_def(&mut self, ecx: &e::EncodeContext, type_param_def: &ty::TypeParameterDef); fn emit_polytype(&mut self, ecx: &e::EncodeContext, pty: ty::Polytype); fn emit_substs(&mut self, ecx: &e::EncodeContext, substs: &subst::Substs); fn emit_auto_adjustment(&mut self, ecx: &e::EncodeContext, adj: &ty::AutoAdjustment); } impl<'a> ebml_writer_helpers for Encoder<'a> { fn emit_ty(&mut self, ecx: &e::EncodeContext, ty: ty::t) { self.emit_opaque(|this| Ok(e::write_type(ecx, this, ty))); } fn emit_tys(&mut self, ecx: &e::EncodeContext, tys: &[ty::t]) { self.emit_from_vec(tys, |this, ty| Ok(this.emit_ty(ecx, *ty))); } fn emit_type_param_def(&mut self, ecx: &e::EncodeContext, type_param_def: &ty::TypeParameterDef) { self.emit_opaque(|this| { Ok(tyencode::enc_type_param_def(this.writer, &ecx.ty_str_ctxt(), type_param_def)) }); } fn emit_polytype(&mut self, ecx: &e::EncodeContext, pty: ty::Polytype) { self.emit_struct("Polytype", 2, |this| { this.emit_struct_field("generics", 0, |this| { this.emit_struct("Generics", 2, |this| { this.emit_struct_field("types", 0, |this| { Ok(encode_vec_per_param_space( this, &pty.generics.types, |this, def| this.emit_type_param_def(ecx, def))) }); this.emit_struct_field("regions", 1, |this| { Ok(encode_vec_per_param_space( this, &pty.generics.regions, |this, def| def.encode(this).unwrap())) }) }) }); this.emit_struct_field("ty", 1, |this| { Ok(this.emit_ty(ecx, pty.ty)) }) }); } fn emit_substs(&mut self, ecx: &e::EncodeContext, substs: &subst::Substs) { self.emit_opaque(|this| Ok(tyencode::enc_substs(this.writer, &ecx.ty_str_ctxt(), substs))); } fn emit_auto_adjustment(&mut self, ecx: &e::EncodeContext, adj: &ty::AutoAdjustment) { self.emit_enum("AutoAdjustment", |this| { match *adj { ty::AutoAddEnv(store) => { this.emit_enum_variant("AutoAddEnv", 0, 1, |this| { this.emit_enum_variant_arg(0, |this| store.encode(this)) }) } ty::AutoDerefRef(ref auto_deref_ref) => { this.emit_enum_variant("AutoDerefRef", 1, 1, |this| { this.emit_enum_variant_arg(0, |this| auto_deref_ref.encode(this)) }) } ty::AutoObject(store, b, def_id, ref substs) => { this.emit_enum_variant("AutoObject", 2, 4, |this| { this.emit_enum_variant_arg(0, |this| store.encode(this)); this.emit_enum_variant_arg(1, |this| b.encode(this)); this.emit_enum_variant_arg(2, |this| def_id.encode(this)); this.emit_enum_variant_arg(3, |this| Ok(this.emit_substs(ecx, substs))) }) } } }); } } trait write_tag_and_id { fn tag(&mut self, tag_id: c::astencode_tag, f: |&mut Self|); fn id(&mut self, id: ast::NodeId); } impl<'a> write_tag_and_id for Encoder<'a> { fn tag(&mut self, tag_id: c::astencode_tag, f: |&mut Encoder<'a>|) { self.start_tag(tag_id as uint); f(self); self.end_tag(); } fn id(&mut self, id: ast::NodeId) { self.wr_tagged_u64(c::tag_table_id as uint, id as u64); } } struct SideTableEncodingIdVisitor<'a,'b> { ecx_ptr: *const libc::c_void, new_ebml_w: &'a mut Encoder<'b>, } impl<'a,'b> ast_util::IdVisitingOperation for SideTableEncodingIdVisitor<'a,'b> { fn visit_id(&self, id: ast::NodeId) { // Note: this will cause a copy of ebml_w, which is bad as // it is mutable. But I believe it's harmless since we generate // balanced EBML. // // FIXME(pcwalton): Don't copy this way. let mut new_ebml_w = unsafe { self.new_ebml_w.unsafe_clone() }; // See above let ecx: &e::EncodeContext = unsafe { mem::transmute(self.ecx_ptr) }; encode_side_tables_for_id(ecx, &mut new_ebml_w, id) } } fn encode_side_tables_for_ii(ecx: &e::EncodeContext, ebml_w: &mut Encoder, ii: &ast::InlinedItem) { ebml_w.start_tag(c::tag_table as uint); let mut new_ebml_w = unsafe { ebml_w.unsafe_clone() }; // Because the ast visitor uses @IdVisitingOperation, I can't pass in // ecx directly, but /I/ know that it'll be fine since the lifetime is // tied to the CrateContext that lives throughout this entire section. ast_util::visit_ids_for_inlined_item(ii, &SideTableEncodingIdVisitor { ecx_ptr: unsafe { mem::transmute(ecx) }, new_ebml_w: &mut new_ebml_w, }); ebml_w.end_tag(); } fn encode_side_tables_for_id(ecx: &e::EncodeContext, ebml_w: &mut Encoder, id: ast::NodeId) { let tcx = ecx.tcx; debug!("Encoding side tables for id {}", id); for def in tcx.def_map.borrow().find(&id).iter() { ebml_w.tag(c::tag_table_def, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| (*def).encode(ebml_w).unwrap()); }) } for &ty in tcx.node_types.borrow().find(&(id as uint)).iter() { ebml_w.tag(c::tag_table_node_type, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { ebml_w.emit_ty(ecx, *ty); }) }) } for &item_substs in tcx.item_substs.borrow().find(&id).iter() { ebml_w.tag(c::tag_table_item_subst, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { ebml_w.emit_substs(ecx, &item_substs.substs); }) }) } for &fv in tcx.freevars.borrow().find(&id).iter() { ebml_w.tag(c::tag_table_freevars, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { ebml_w.emit_from_vec(fv.as_slice(), |ebml_w, fv_entry| { Ok(encode_freevar_entry(ebml_w, fv_entry)) }); }) }) } let lid = ast::DefId { krate: ast::LOCAL_CRATE, node: id }; for &pty in tcx.tcache.borrow().find(&lid).iter() { ebml_w.tag(c::tag_table_tcache, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { ebml_w.emit_polytype(ecx, pty.clone()); }) }) } for &type_param_def in tcx.ty_param_defs.borrow().find(&id).iter() { ebml_w.tag(c::tag_table_param_defs, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { ebml_w.emit_type_param_def(ecx, type_param_def) }) }) } let method_call = MethodCall::expr(id); for &method in tcx.method_map.borrow().find(&method_call).iter() { ebml_w.tag(c::tag_table_method_map, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { encode_method_callee(ecx, ebml_w, method_call.adjustment, method) }) }) } for &dr in tcx.vtable_map.borrow().find(&method_call).iter() { ebml_w.tag(c::tag_table_vtable_map, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { encode_vtable_res_with_key(ecx, ebml_w, method_call.adjustment, dr); }) }) } for &adj in tcx.adjustments.borrow().find(&id).iter() { match *adj { ty::AutoDerefRef(adj) => { for autoderef in range(0, adj.autoderefs) { let method_call = MethodCall::autoderef(id, autoderef); for &method in tcx.method_map.borrow().find(&method_call).iter() { ebml_w.tag(c::tag_table_method_map, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { encode_method_callee(ecx, ebml_w, method_call.adjustment, method) }) }) } for &dr in tcx.vtable_map.borrow().find(&method_call).iter() { ebml_w.tag(c::tag_table_vtable_map, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { encode_vtable_res_with_key(ecx, ebml_w, method_call.adjustment, dr); }) }) } } } ty::AutoObject(..) => { let method_call = MethodCall::autoobject(id); for &method in tcx.method_map.borrow().find(&method_call).iter() { ebml_w.tag(c::tag_table_method_map, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { encode_method_callee(ecx, ebml_w, method_call.adjustment, method) }) }) } for &dr in tcx.vtable_map.borrow().find(&method_call).iter() { ebml_w.tag(c::tag_table_vtable_map, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { encode_vtable_res_with_key(ecx, ebml_w, method_call.adjustment, dr); }) }) } } _ => {} } ebml_w.tag(c::tag_table_adjustments, |ebml_w| { ebml_w.id(id); ebml_w.tag(c::tag_table_val, |ebml_w| { ebml_w.emit_auto_adjustment(ecx, adj); }) }) } } trait doc_decoder_helpers { fn as_int(&self) -> int; fn opt_child(&self, tag: c::astencode_tag) -> Option; } impl<'a> doc_decoder_helpers for ebml::Doc<'a> { fn as_int(&self) -> int { reader::doc_as_u64(*self) as int } fn opt_child(&self, tag: c::astencode_tag) -> Option> { reader::maybe_get_doc(*self, tag as uint) } } trait ebml_decoder_decoder_helpers { fn read_ty(&mut self, xcx: &ExtendedDecodeContext) -> ty::t; fn read_tys(&mut self, xcx: &ExtendedDecodeContext) -> Vec; fn read_type_param_def(&mut self, xcx: &ExtendedDecodeContext) -> ty::TypeParameterDef; fn read_polytype(&mut self, xcx: &ExtendedDecodeContext) -> ty::Polytype; fn read_substs(&mut self, xcx: &ExtendedDecodeContext) -> subst::Substs; fn read_auto_adjustment(&mut self, xcx: &ExtendedDecodeContext) -> ty::AutoAdjustment; fn convert_def_id(&mut self, xcx: &ExtendedDecodeContext, source: DefIdSource, did: ast::DefId) -> ast::DefId; // Versions of the type reading functions that don't need the full // ExtendedDecodeContext. fn read_ty_noxcx(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> ty::t; fn read_tys_noxcx(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> Vec; fn read_substs_noxcx(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> subst::Substs; } impl<'a> ebml_decoder_decoder_helpers for reader::Decoder<'a> { fn read_ty_noxcx(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> ty::t { self.read_opaque(|_, doc| { Ok(tydecode::parse_ty_data( doc.data, cdata.cnum, doc.start, tcx, |_, id| decoder::translate_def_id(cdata, id))) }).unwrap() } fn read_tys_noxcx(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> Vec { self.read_to_vec(|this| Ok(this.read_ty_noxcx(tcx, cdata)) ) .unwrap() .move_iter() .collect() } fn read_substs_noxcx(&mut self, tcx: &ty::ctxt, cdata: &cstore::crate_metadata) -> subst::Substs { self.read_opaque(|_, doc| { Ok(tydecode::parse_substs_data( doc.data, cdata.cnum, doc.start, tcx, |_, id| decoder::translate_def_id(cdata, id))) }).unwrap() } fn read_ty(&mut self, xcx: &ExtendedDecodeContext) -> ty::t { // Note: regions types embed local node ids. In principle, we // should translate these node ids into the new decode // context. However, we do not bother, because region types // are not used during trans. return self.read_opaque(|this, doc| { debug!("read_ty({})", type_string(doc)); let ty = tydecode::parse_ty_data( doc.data, xcx.dcx.cdata.cnum, doc.start, xcx.dcx.tcx, |s, a| this.convert_def_id(xcx, s, a)); Ok(ty) }).unwrap(); fn type_string(doc: ebml::Doc) -> String { let mut str = String::new(); for i in range(doc.start, doc.end) { str.push_char(doc.data[i] as char); } str } } fn read_tys(&mut self, xcx: &ExtendedDecodeContext) -> Vec { self.read_to_vec(|this| Ok(this.read_ty(xcx))).unwrap().move_iter().collect() } fn read_type_param_def(&mut self, xcx: &ExtendedDecodeContext) -> ty::TypeParameterDef { self.read_opaque(|this, doc| { Ok(tydecode::parse_type_param_def_data( doc.data, doc.start, xcx.dcx.cdata.cnum, xcx.dcx.tcx, |s, a| this.convert_def_id(xcx, s, a))) }).unwrap() } fn read_polytype(&mut self, xcx: &ExtendedDecodeContext) -> ty::Polytype { self.read_struct("Polytype", 2, |this| { Ok(ty::Polytype { generics: this.read_struct_field("generics", 0, |this| { this.read_struct("Generics", 2, |this| { Ok(ty::Generics { types: this.read_struct_field("types", 0, |this| { Ok(this.read_vec_per_param_space( |this| this.read_type_param_def(xcx))) }).unwrap(), regions: this.read_struct_field("regions", 1, |this| { Ok(this.read_vec_per_param_space( |this| Decodable::decode(this).unwrap())) }).unwrap() }) }) }).unwrap(), ty: this.read_struct_field("ty", 1, |this| { Ok(this.read_ty(xcx)) }).unwrap() }) }).unwrap() } fn read_substs(&mut self, xcx: &ExtendedDecodeContext) -> subst::Substs { self.read_opaque(|this, doc| { Ok(tydecode::parse_substs_data(doc.data, xcx.dcx.cdata.cnum, doc.start, xcx.dcx.tcx, |s, a| this.convert_def_id(xcx, s, a))) }).unwrap() } fn read_auto_adjustment(&mut self, xcx: &ExtendedDecodeContext) -> ty::AutoAdjustment { self.read_enum("AutoAdjustment", |this| { let variants = ["AutoAddEnv", "AutoDerefRef", "AutoObject"]; this.read_enum_variant(variants, |this, i| { Ok(match i { 0 => { let store: ty::TraitStore = this.read_enum_variant_arg(0, |this| Decodable::decode(this)).unwrap(); ty:: AutoAddEnv(store.tr(xcx)) } 1 => { let auto_deref_ref: ty::AutoDerefRef = this.read_enum_variant_arg(0, |this| Decodable::decode(this)).unwrap(); ty::AutoDerefRef(auto_deref_ref.tr(xcx)) } 2 => { let store: ty::TraitStore = this.read_enum_variant_arg(0, |this| Decodable::decode(this)).unwrap(); let b: ty::BuiltinBounds = this.read_enum_variant_arg(1, |this| Decodable::decode(this)).unwrap(); let def_id: ast::DefId = this.read_enum_variant_arg(2, |this| Decodable::decode(this)).unwrap(); let substs = this.read_enum_variant_arg(3, |this| Ok(this.read_substs(xcx))) .unwrap(); ty::AutoObject(store.tr(xcx), b, def_id.tr(xcx), substs) } _ => fail!("bad enum variant for ty::AutoAdjustment") }) }) }).unwrap() } fn convert_def_id(&mut self, xcx: &ExtendedDecodeContext, source: tydecode::DefIdSource, did: ast::DefId) -> ast::DefId { /*! * Converts a def-id that appears in a type. The correct * translation will depend on what kind of def-id this is. * This is a subtle point: type definitions are not * inlined into the current crate, so if the def-id names * a nominal type or type alias, then it should be * translated to refer to the source crate. * * However, *type parameters* are cloned along with the function * they are attached to. So we should translate those def-ids * to refer to the new, cloned copy of the type parameter. * We only see references to free type parameters in the body of * an inlined function. In such cases, we need the def-id to * be a local id so that the TypeContents code is able to lookup * the relevant info in the ty_param_defs table. * * *Region parameters*, unfortunately, are another kettle of fish. * In such cases, def_id's can appear in types to distinguish * shadowed bound regions and so forth. It doesn't actually * matter so much what we do to these, since regions are erased * at trans time, but it's good to keep them consistent just in * case. We translate them with `tr_def_id()` which will map * the crate numbers back to the original source crate. * * It'd be really nice to refactor the type repr to not include * def-ids so that all these distinctions were unnecessary. */ let r = match source { NominalType | TypeWithId | RegionParameter => xcx.tr_def_id(did), TypeParameter => xcx.tr_intern_def_id(did) }; debug!("convert_def_id(source={:?}, did={:?})={:?}", source, did, r); return r; } } fn decode_side_tables(xcx: &ExtendedDecodeContext, ast_doc: ebml::Doc) { let dcx = xcx.dcx; let tbl_doc = ast_doc.get(c::tag_table as uint); reader::docs(tbl_doc, |tag, entry_doc| { let id0 = entry_doc.get(c::tag_table_id as uint).as_int(); let id = xcx.tr_id(id0 as ast::NodeId); debug!(">> Side table document with tag 0x{:x} \ found for id {} (orig {})", tag, id, id0); match c::astencode_tag::from_uint(tag) { None => { xcx.dcx.tcx.sess.bug( format!("unknown tag found in side tables: {:x}", tag).as_slice()); } Some(value) => { let val_doc = entry_doc.get(c::tag_table_val as uint); let mut val_dsr = reader::Decoder::new(val_doc); let val_dsr = &mut val_dsr; match value { c::tag_table_def => { let def = decode_def(xcx, val_doc); dcx.tcx.def_map.borrow_mut().insert(id, def); } c::tag_table_node_type => { let ty = val_dsr.read_ty(xcx); debug!("inserting ty for node {:?}: {}", id, ty_to_str(dcx.tcx, ty)); dcx.tcx.node_types.borrow_mut().insert(id as uint, ty); } c::tag_table_item_subst => { let item_substs = ty::ItemSubsts { substs: val_dsr.read_substs(xcx) }; dcx.tcx.item_substs.borrow_mut().insert( id, item_substs); } c::tag_table_freevars => { let fv_info = val_dsr.read_to_vec(|val_dsr| { Ok(val_dsr.read_freevar_entry(xcx)) }).unwrap().move_iter().collect(); dcx.tcx.freevars.borrow_mut().insert(id, fv_info); } c::tag_table_tcache => { let pty = val_dsr.read_polytype(xcx); let lid = ast::DefId { krate: ast::LOCAL_CRATE, node: id }; dcx.tcx.tcache.borrow_mut().insert(lid, pty); } c::tag_table_param_defs => { let bounds = val_dsr.read_type_param_def(xcx); dcx.tcx.ty_param_defs.borrow_mut().insert(id, bounds); } c::tag_table_method_map => { let (adjustment, method) = val_dsr.read_method_callee(xcx); let method_call = MethodCall { expr_id: id, adjustment: adjustment }; dcx.tcx.method_map.borrow_mut().insert(method_call, method); } c::tag_table_vtable_map => { let (adjustment, vtable_res) = val_dsr.read_vtable_res_with_key(xcx.dcx.tcx, xcx.dcx.cdata); let vtable_key = MethodCall { expr_id: id, adjustment: adjustment }; dcx.tcx.vtable_map.borrow_mut().insert(vtable_key, vtable_res); } c::tag_table_adjustments => { let adj: ty::AutoAdjustment = val_dsr.read_auto_adjustment(xcx); dcx.tcx.adjustments.borrow_mut().insert(id, adj); } _ => { xcx.dcx.tcx.sess.bug( format!("unknown tag found in side tables: {:x}", tag).as_slice()); } } } } debug!(">< Side table doc loaded"); true }); } // ______________________________________________________________________ // Testing of astencode_gen #[cfg(test)] fn encode_item_ast(ebml_w: &mut Encoder, item: Gc) { ebml_w.start_tag(c::tag_tree as uint); (*item).encode(ebml_w); ebml_w.end_tag(); } #[cfg(test)] fn decode_item_ast(par_doc: ebml::Doc) -> Gc { let chi_doc = par_doc.get(c::tag_tree as uint); let mut d = reader::Decoder::new(chi_doc); box(GC) Decodable::decode(&mut d).unwrap() } #[cfg(test)] trait fake_ext_ctxt { fn cfg(&self) -> ast::CrateConfig; fn parse_sess<'a>(&'a self) -> &'a parse::ParseSess; fn call_site(&self) -> Span; fn ident_of(&self, st: &str) -> ast::Ident; } #[cfg(test)] impl fake_ext_ctxt for parse::ParseSess { fn cfg(&self) -> ast::CrateConfig { Vec::new() } fn parse_sess<'a>(&'a self) -> &'a parse::ParseSess { self } fn call_site(&self) -> Span { codemap::Span { lo: codemap::BytePos(0), hi: codemap::BytePos(0), expn_info: None } } fn ident_of(&self, st: &str) -> ast::Ident { token::str_to_ident(st) } } #[cfg(test)] fn mk_ctxt() -> parse::ParseSess { parse::new_parse_sess() } #[cfg(test)] fn roundtrip(in_item: Option>) { use std::io::MemWriter; let in_item = in_item.unwrap(); let mut wr = MemWriter::new(); { let mut ebml_w = writer::Encoder::new(&mut wr); encode_item_ast(&mut ebml_w, in_item); } let ebml_doc = ebml::Doc::new(wr.get_ref()); let out_item = decode_item_ast(ebml_doc); assert!(in_item == out_item); } #[test] fn test_basic() { let cx = mk_ctxt(); roundtrip(quote_item!(cx, fn foo() {} )); } #[test] fn test_smalltalk() { let cx = mk_ctxt(); roundtrip(quote_item!(cx, fn foo() -> int { 3 + 4 } // first smalltalk program ever executed. )); } #[test] fn test_more() { let cx = mk_ctxt(); roundtrip(quote_item!(cx, fn foo(x: uint, y: uint) -> uint { let z = x + y; return z; } )); } #[test] fn test_simplification() { let cx = mk_ctxt(); let item = quote_item!(&cx, fn new_int_alist() -> alist { fn eq_int(a: int, b: int) -> bool { a == b } return alist {eq_fn: eq_int, data: Vec::new()}; } ).unwrap(); let item_in = e::IIItemRef(item); let item_out = simplify_ast(item_in); let item_exp = ast::IIItem(quote_item!(cx, fn new_int_alist() -> alist { return alist {eq_fn: eq_int, data: Vec::new()}; } ).unwrap()); match (item_out, item_exp) { (ast::IIItem(item_out), ast::IIItem(item_exp)) => { assert!(pprust::item_to_str(item_out) == pprust::item_to_str(item_exp)); } _ => fail!() } }