1399 lines
48 KiB
Rust
1399 lines
48 KiB
Rust
// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use c = metadata::common;
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use cstore = metadata::cstore;
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use driver::session::Session;
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use e = metadata::encoder;
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use metadata::decoder;
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use metadata::tydecode;
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use metadata::tydecode::{DefIdSource, NominalType, TypeWithId, TypeParameter,
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RegionParameter};
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use metadata::tyencode;
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use middle::freevars::freevar_entry;
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use middle::typeck::{method_origin, method_map_entry};
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use middle::{ty, typeck, moves};
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use middle;
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use util::ppaux::ty_to_str;
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use syntax::ast;
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use syntax::ast_map;
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use syntax::ast_util::inlined_item_utils;
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use syntax::ast_util;
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use syntax::codemap::Span;
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use syntax::codemap;
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use syntax::fold::*;
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use syntax::fold;
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use syntax::parse::token;
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use syntax;
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use std::at_vec;
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use std::libc;
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use std::cast;
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use std::io::Seek;
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use extra::ebml::reader;
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use extra::ebml;
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use extra::serialize;
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use extra::serialize::{Encoder, Encodable, EncoderHelpers, DecoderHelpers};
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use extra::serialize::{Decoder, Decodable};
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use writer = extra::ebml::writer;
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#[cfg(test)] use syntax::parse;
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#[cfg(test)] use syntax::print::pprust;
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// Auxiliary maps of things to be encoded
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pub struct Maps {
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root_map: middle::borrowck::root_map,
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method_map: middle::typeck::method_map,
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vtable_map: middle::typeck::vtable_map,
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write_guard_map: middle::borrowck::write_guard_map,
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capture_map: middle::moves::CaptureMap,
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}
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struct DecodeContext {
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cdata: @cstore::crate_metadata,
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tcx: ty::ctxt,
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maps: Maps
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}
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struct ExtendedDecodeContext {
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dcx: @DecodeContext,
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from_id_range: ast_util::id_range,
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to_id_range: ast_util::id_range
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}
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trait tr {
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fn tr(&self, xcx: @ExtendedDecodeContext) -> Self;
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}
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trait tr_intern {
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fn tr_intern(&self, xcx: @ExtendedDecodeContext) -> ast::DefId;
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}
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// ______________________________________________________________________
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// Top-level methods.
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pub fn encode_inlined_item(ecx: &e::EncodeContext,
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ebml_w: &mut writer::Encoder,
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path: &[ast_map::path_elt],
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ii: ast::inlined_item,
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maps: Maps) {
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debug!("> Encoding inlined item: {}::{} ({})",
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ast_map::path_to_str(path, token::get_ident_interner()),
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ecx.tcx.sess.str_of(ii.ident()),
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ebml_w.writer.tell());
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let id_range = ast_util::compute_id_range_for_inlined_item(&ii);
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ebml_w.start_tag(c::tag_ast as uint);
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id_range.encode(ebml_w);
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encode_ast(ebml_w, simplify_ast(&ii));
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encode_side_tables_for_ii(ecx, maps, ebml_w, &ii);
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ebml_w.end_tag();
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debug!("< Encoded inlined fn: {}::{} ({})",
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ast_map::path_to_str(path, token::get_ident_interner()),
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ecx.tcx.sess.str_of(ii.ident()),
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ebml_w.writer.tell());
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}
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pub fn decode_inlined_item(cdata: @cstore::crate_metadata,
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tcx: ty::ctxt,
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maps: Maps,
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path: &[ast_map::path_elt],
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par_doc: ebml::Doc)
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-> Option<ast::inlined_item> {
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let dcx = @DecodeContext {
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cdata: cdata,
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tcx: tcx,
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maps: maps
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};
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match par_doc.opt_child(c::tag_ast) {
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None => None,
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Some(ast_doc) => {
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debug!("> Decoding inlined fn: {}::?",
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ast_map::path_to_str(path, token::get_ident_interner()));
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let mut ast_dsr = reader::Decoder(ast_doc);
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let from_id_range = Decodable::decode(&mut ast_dsr);
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let to_id_range = reserve_id_range(dcx.tcx.sess, from_id_range);
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let xcx = @ExtendedDecodeContext {
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dcx: dcx,
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from_id_range: from_id_range,
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to_id_range: to_id_range
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};
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let raw_ii = decode_ast(ast_doc);
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let ii = renumber_ast(xcx, raw_ii);
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debug!("Fn named: {}", tcx.sess.str_of(ii.ident()));
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debug!("< Decoded inlined fn: {}::{}",
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ast_map::path_to_str(path, token::get_ident_interner()),
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tcx.sess.str_of(ii.ident()));
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ast_map::map_decoded_item(tcx.sess.diagnostic(),
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dcx.tcx.items,
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path.to_owned(),
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&ii);
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decode_side_tables(xcx, ast_doc);
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match ii {
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ast::ii_item(i) => {
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debug!(">>> DECODED ITEM >>>\n{}\n<<< DECODED ITEM <<<",
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syntax::print::pprust::item_to_str(i, tcx.sess.intr()));
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}
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_ => { }
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}
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Some(ii)
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}
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}
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}
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// ______________________________________________________________________
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// Enumerating the IDs which appear in an AST
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fn reserve_id_range(sess: Session,
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from_id_range: ast_util::id_range) -> ast_util::id_range {
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// Handle the case of an empty range:
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if from_id_range.empty() { return from_id_range; }
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let cnt = from_id_range.max - from_id_range.min;
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let to_id_min = sess.reserve_node_ids(cnt);
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let to_id_max = to_id_min + cnt;
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ast_util::id_range { min: to_id_min, max: to_id_max }
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}
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impl ExtendedDecodeContext {
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pub fn tr_id(&self, id: ast::NodeId) -> ast::NodeId {
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/*!
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* Translates an internal id, meaning a node id that is known
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* to refer to some part of the item currently being inlined,
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* such as a local variable or argument. All naked node-ids
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* that appear in types have this property, since if something
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* might refer to an external item we would use a def-id to
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* allow for the possibility that the item resides in another
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* crate.
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*/
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// from_id_range should be non-empty
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assert!(!self.from_id_range.empty());
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(id - self.from_id_range.min + self.to_id_range.min)
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}
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pub fn tr_def_id(&self, did: ast::DefId) -> ast::DefId {
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/*!
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* Translates an EXTERNAL def-id, converting the crate number
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* from the one used in the encoded data to the current crate
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* numbers.. By external, I mean that it be translated to a
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* reference to the item in its original crate, as opposed to
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* being translated to a reference to the inlined version of
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* the item. This is typically, but not always, what you
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* want, because most def-ids refer to external things like
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* types or other fns that may or may not be inlined. Note
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* that even when the inlined function is referencing itself
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* recursively, we would want `tr_def_id` for that
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* reference--- conceptually the function calls the original,
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* non-inlined version, and trans deals with linking that
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* recursive call to the inlined copy.
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*
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* However, there are a *few* cases where def-ids are used but
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* we know that the thing being referenced is in fact *internal*
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* to the item being inlined. In those cases, you should use
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* `tr_intern_def_id()` below.
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*/
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decoder::translate_def_id(self.dcx.cdata, did)
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}
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pub fn tr_intern_def_id(&self, did: ast::DefId) -> ast::DefId {
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/*!
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* Translates an INTERNAL def-id, meaning a def-id that is
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* known to refer to some part of the item currently being
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* inlined. In that case, we want to convert the def-id to
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* refer to the current crate and to the new, inlined node-id.
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*/
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assert_eq!(did.crate, ast::LOCAL_CRATE);
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ast::DefId { crate: ast::LOCAL_CRATE, node: self.tr_id(did.node) }
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}
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pub fn tr_span(&self, _span: Span) -> Span {
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codemap::dummy_sp() // FIXME (#1972): handle span properly
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}
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}
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impl tr_intern for ast::DefId {
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fn tr_intern(&self, xcx: @ExtendedDecodeContext) -> ast::DefId {
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xcx.tr_intern_def_id(*self)
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}
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}
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impl tr for ast::DefId {
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fn tr(&self, xcx: @ExtendedDecodeContext) -> ast::DefId {
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xcx.tr_def_id(*self)
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}
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}
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impl tr for Option<ast::DefId> {
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fn tr(&self, xcx: @ExtendedDecodeContext) -> Option<ast::DefId> {
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self.map(|d| xcx.tr_def_id(d))
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}
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}
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impl tr for Span {
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fn tr(&self, xcx: @ExtendedDecodeContext) -> Span {
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xcx.tr_span(*self)
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}
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}
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trait def_id_encoder_helpers {
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fn emit_def_id(&mut self, did: ast::DefId);
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}
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impl<S:serialize::Encoder> def_id_encoder_helpers for S {
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fn emit_def_id(&mut self, did: ast::DefId) {
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did.encode(self)
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}
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}
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trait def_id_decoder_helpers {
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fn read_def_id(&mut self, xcx: @ExtendedDecodeContext) -> ast::DefId;
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fn read_def_id_noxcx(&mut self,
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cdata: @cstore::crate_metadata) -> ast::DefId;
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}
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impl<D:serialize::Decoder> def_id_decoder_helpers for D {
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fn read_def_id(&mut self, xcx: @ExtendedDecodeContext) -> ast::DefId {
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let did: ast::DefId = Decodable::decode(self);
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did.tr(xcx)
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}
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fn read_def_id_noxcx(&mut self,
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cdata: @cstore::crate_metadata) -> ast::DefId {
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let did: ast::DefId = Decodable::decode(self);
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decoder::translate_def_id(cdata, did)
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}
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}
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// ______________________________________________________________________
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// Encoding and decoding the AST itself
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//
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// The hard work is done by an autogenerated module astencode_gen. To
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// regenerate astencode_gen, run src/etc/gen-astencode. It will
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// replace astencode_gen with a dummy file and regenerate its
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// contents. If you get compile errors, the dummy file
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// remains---resolve the errors and then rerun astencode_gen.
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// Annoying, I know, but hopefully only temporary.
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//
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// When decoding, we have to renumber the AST so that the node ids that
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// appear within are disjoint from the node ids in our existing ASTs.
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// We also have to adjust the spans: for now we just insert a dummy span,
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// but eventually we should add entries to the local codemap as required.
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fn encode_ast(ebml_w: &mut writer::Encoder, item: ast::inlined_item) {
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ebml_w.start_tag(c::tag_tree as uint);
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item.encode(ebml_w);
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ebml_w.end_tag();
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}
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struct NestedItemsDropper {
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contents: (),
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}
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impl fold::ast_fold for NestedItemsDropper {
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fn fold_block(&self, blk: ast::P<ast::Block>) -> ast::P<ast::Block> {
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let stmts_sans_items = blk.stmts.iter().filter_map(|stmt| {
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match stmt.node {
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ast::StmtExpr(_, _) | ast::StmtSemi(_, _) |
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ast::StmtDecl(@codemap::Spanned {
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node: ast::DeclLocal(_),
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span: _
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}, _) => Some(*stmt),
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ast::StmtDecl(@codemap::Spanned {
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node: ast::DeclItem(_),
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span: _
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}, _) => None,
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ast::StmtMac(..) => fail!("unexpanded macro in astencode")
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}
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}).collect();
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let blk_sans_items = ast::P(ast::Block {
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view_items: ~[], // I don't know if we need the view_items here,
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// but it doesn't break tests!
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stmts: stmts_sans_items,
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expr: blk.expr,
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id: blk.id,
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rules: blk.rules,
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span: blk.span,
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});
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fold::noop_fold_block(blk_sans_items, self)
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}
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}
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// Produces a simplified copy of the AST which does not include things
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// that we do not need to or do not want to export. For example, we
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// do not include any nested items: if these nested items are to be
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// inlined, their AST will be exported separately (this only makes
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// sense because, in Rust, nested items are independent except for
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// their visibility).
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//
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// As it happens, trans relies on the fact that we do not export
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// nested items, as otherwise it would get confused when translating
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// inlined items.
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fn simplify_ast(ii: &ast::inlined_item) -> ast::inlined_item {
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let fld = NestedItemsDropper {
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contents: (),
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};
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match *ii {
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//hack: we're not dropping items
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ast::ii_item(i) => ast::ii_item(fld.fold_item(i)
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.expect_one("expected one item")),
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ast::ii_method(d, is_provided, m) =>
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ast::ii_method(d, is_provided, fld.fold_method(m)),
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ast::ii_foreign(i) => ast::ii_foreign(fld.fold_foreign_item(i))
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}
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}
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fn decode_ast(par_doc: ebml::Doc) -> ast::inlined_item {
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let chi_doc = par_doc.get(c::tag_tree as uint);
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let mut d = reader::Decoder(chi_doc);
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Decodable::decode(&mut d)
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}
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struct AstRenumberer {
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xcx: @ExtendedDecodeContext,
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}
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impl fold::ast_fold for AstRenumberer {
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fn new_id(&self, id: ast::NodeId) -> ast::NodeId {
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self.xcx.tr_id(id)
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}
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fn new_span(&self, span: Span) -> Span {
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self.xcx.tr_span(span)
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}
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}
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fn renumber_ast(xcx: @ExtendedDecodeContext, ii: ast::inlined_item)
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-> ast::inlined_item {
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let fld = AstRenumberer {
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xcx: xcx,
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};
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match ii {
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ast::ii_item(i) => ast::ii_item(fld.fold_item(i)
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.expect_one("expected one item")),
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ast::ii_method(d, is_provided, m) =>
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ast::ii_method(xcx.tr_def_id(d), is_provided, fld.fold_method(m)),
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ast::ii_foreign(i) => ast::ii_foreign(fld.fold_foreign_item(i)),
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}
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}
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// ______________________________________________________________________
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// Encoding and decoding of ast::def
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fn decode_def(xcx: @ExtendedDecodeContext, doc: ebml::Doc) -> ast::Def {
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let mut dsr = reader::Decoder(doc);
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let def: ast::Def = Decodable::decode(&mut dsr);
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def.tr(xcx)
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}
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impl tr for ast::Def {
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fn tr(&self, xcx: @ExtendedDecodeContext) -> ast::Def {
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match *self {
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ast::DefFn(did, p) => ast::DefFn(did.tr(xcx), p),
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ast::DefStaticMethod(did, wrapped_did2, p) => {
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ast::DefStaticMethod(did.tr(xcx),
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match wrapped_did2 {
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ast::FromTrait(did2) => {
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ast::FromTrait(did2.tr(xcx))
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}
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ast::FromImpl(did2) => {
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ast::FromImpl(did2.tr(xcx))
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}
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},
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p)
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}
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ast::DefMethod(did0, did1) => {
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ast::DefMethod(did0.tr(xcx), did1.map(|did1| did1.tr(xcx)))
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}
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ast::DefSelfTy(nid) => { ast::DefSelfTy(xcx.tr_id(nid)) }
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ast::DefSelf(nid, m) => { ast::DefSelf(xcx.tr_id(nid), m) }
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ast::DefMod(did) => { ast::DefMod(did.tr(xcx)) }
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ast::DefForeignMod(did) => { ast::DefForeignMod(did.tr(xcx)) }
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ast::DefStatic(did, m) => { ast::DefStatic(did.tr(xcx), m) }
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ast::DefArg(nid, b) => { ast::DefArg(xcx.tr_id(nid), b) }
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ast::DefLocal(nid, b) => { ast::DefLocal(xcx.tr_id(nid), b) }
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ast::DefVariant(e_did, v_did, is_s) => {
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ast::DefVariant(e_did.tr(xcx), v_did.tr(xcx), is_s)
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},
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ast::DefTrait(did) => ast::DefTrait(did.tr(xcx)),
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ast::DefTy(did) => ast::DefTy(did.tr(xcx)),
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ast::DefPrimTy(p) => ast::DefPrimTy(p),
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ast::DefTyParam(did, v) => ast::DefTyParam(did.tr(xcx), v),
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ast::DefBinding(nid, bm) => ast::DefBinding(xcx.tr_id(nid), bm),
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ast::DefUse(did) => ast::DefUse(did.tr(xcx)),
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ast::DefUpvar(nid1, def, nid2, nid3) => {
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ast::DefUpvar(xcx.tr_id(nid1),
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@(*def).tr(xcx),
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xcx.tr_id(nid2),
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xcx.tr_id(nid3))
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}
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ast::DefStruct(did) => ast::DefStruct(did.tr(xcx)),
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ast::DefRegion(nid) => ast::DefRegion(xcx.tr_id(nid)),
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ast::DefTyParamBinder(nid) => {
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ast::DefTyParamBinder(xcx.tr_id(nid))
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}
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ast::DefLabel(nid) => ast::DefLabel(xcx.tr_id(nid))
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}
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}
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}
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// ______________________________________________________________________
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// Encoding and decoding of adjustment information
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impl tr for ty::AutoAdjustment {
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fn tr(&self, xcx: @ExtendedDecodeContext) -> ty::AutoAdjustment {
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match *self {
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ty::AutoAddEnv(r, s) => ty::AutoAddEnv(r.tr(xcx), s),
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ty::AutoDerefRef(ref adr) => {
|
|
ty::AutoDerefRef(ty::AutoDerefRef {
|
|
autoderefs: adr.autoderefs,
|
|
autoref: adr.autoref.map(|ar| ar.tr(xcx)),
|
|
})
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
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, index, ident) => ty::ReEarlyBound(xcx.tr_id(id),
|
|
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),
|
|
}
|
|
}
|
|
}
|
|
|
|
// ______________________________________________________________________
|
|
// Encoding and decoding of freevar information
|
|
|
|
fn encode_freevar_entry(ebml_w: &mut writer::Encoder, fv: @freevar_entry) {
|
|
(*fv).encode(ebml_w)
|
|
}
|
|
|
|
trait ebml_decoder_helper {
|
|
fn read_freevar_entry(&mut self, xcx: @ExtendedDecodeContext)
|
|
-> freevar_entry;
|
|
}
|
|
|
|
impl ebml_decoder_helper for reader::Decoder {
|
|
fn read_freevar_entry(&mut self, xcx: @ExtendedDecodeContext)
|
|
-> freevar_entry {
|
|
let fv: freevar_entry = Decodable::decode(self);
|
|
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 CaptureVar information
|
|
|
|
trait capture_var_helper {
|
|
fn read_capture_var(&mut self, xcx: @ExtendedDecodeContext)
|
|
-> moves::CaptureVar;
|
|
}
|
|
|
|
impl capture_var_helper for reader::Decoder {
|
|
fn read_capture_var(&mut self, xcx: @ExtendedDecodeContext)
|
|
-> moves::CaptureVar {
|
|
let cvar: moves::CaptureVar = Decodable::decode(self);
|
|
cvar.tr(xcx)
|
|
}
|
|
}
|
|
|
|
impl tr for moves::CaptureVar {
|
|
fn tr(&self, xcx: @ExtendedDecodeContext) -> moves::CaptureVar {
|
|
moves::CaptureVar {
|
|
def: self.def.tr(xcx),
|
|
span: self.span.tr(xcx),
|
|
mode: self.mode
|
|
}
|
|
}
|
|
}
|
|
|
|
// ______________________________________________________________________
|
|
// Encoding and decoding of method_map_entry
|
|
|
|
trait read_method_map_entry_helper {
|
|
fn read_method_map_entry(&mut self, xcx: @ExtendedDecodeContext)
|
|
-> method_map_entry;
|
|
}
|
|
|
|
fn encode_method_map_entry(ecx: &e::EncodeContext,
|
|
ebml_w: &mut writer::Encoder,
|
|
mme: method_map_entry) {
|
|
ebml_w.emit_struct("method_map_entry", 3, |ebml_w| {
|
|
ebml_w.emit_struct_field("self_ty", 0u, |ebml_w| {
|
|
ebml_w.emit_ty(ecx, mme.self_ty);
|
|
});
|
|
ebml_w.emit_struct_field("explicit_self", 2u, |ebml_w| {
|
|
mme.explicit_self.encode(ebml_w);
|
|
});
|
|
ebml_w.emit_struct_field("origin", 1u, |ebml_w| {
|
|
mme.origin.encode(ebml_w);
|
|
});
|
|
ebml_w.emit_struct_field("self_mode", 3, |ebml_w| {
|
|
mme.self_mode.encode(ebml_w);
|
|
});
|
|
})
|
|
}
|
|
|
|
impl read_method_map_entry_helper for reader::Decoder {
|
|
fn read_method_map_entry(&mut self, xcx: @ExtendedDecodeContext)
|
|
-> method_map_entry {
|
|
self.read_struct("method_map_entry", 3, |this| {
|
|
method_map_entry {
|
|
self_ty: this.read_struct_field("self_ty", 0u, |this| {
|
|
this.read_ty(xcx)
|
|
}),
|
|
explicit_self: this.read_struct_field("explicit_self",
|
|
2,
|
|
|this| {
|
|
let explicit_self: ast::explicit_self_ = Decodable::decode(this);
|
|
explicit_self
|
|
}),
|
|
origin: this.read_struct_field("origin", 1, |this| {
|
|
let method_origin: method_origin =
|
|
Decodable::decode(this);
|
|
method_origin.tr(xcx)
|
|
}),
|
|
self_mode: this.read_struct_field("self_mode", 3, |this| {
|
|
let self_mode: ty::SelfMode = Decodable::decode(this);
|
|
self_mode
|
|
}),
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
impl tr for method_origin {
|
|
fn tr(&self, xcx: @ExtendedDecodeContext) -> method_origin {
|
|
match *self {
|
|
typeck::method_static(did) => {
|
|
typeck::method_static(did.tr(xcx))
|
|
}
|
|
typeck::method_param(ref mp) => {
|
|
typeck::method_param(
|
|
typeck::method_param {
|
|
trait_id: mp.trait_id.tr(xcx),
|
|
.. *mp
|
|
}
|
|
)
|
|
}
|
|
typeck::method_object(ref mo) => {
|
|
typeck::method_object(
|
|
typeck::method_object {
|
|
trait_id: mo.trait_id.tr(xcx),
|
|
.. *mo
|
|
}
|
|
)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// ______________________________________________________________________
|
|
// Encoding and decoding vtable_res
|
|
|
|
pub fn encode_vtable_res(ecx: &e::EncodeContext,
|
|
ebml_w: &mut writer::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.
|
|
ebml_w.emit_from_vec(*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 writer::Encoder,
|
|
param_tables: typeck::vtable_param_res) {
|
|
ebml_w.emit_from_vec(*param_tables, |ebml_w, vtable_origin| {
|
|
encode_vtable_origin(ecx, ebml_w, vtable_origin)
|
|
})
|
|
}
|
|
|
|
|
|
pub fn encode_vtable_origin(ecx: &e::EncodeContext,
|
|
ebml_w: &mut writer::Encoder,
|
|
vtable_origin: &typeck::vtable_origin) {
|
|
ebml_w.emit_enum("vtable_origin", |ebml_w| {
|
|
match *vtable_origin {
|
|
typeck::vtable_static(def_id, ref tys, vtable_res) => {
|
|
ebml_w.emit_enum_variant("vtable_static", 0u, 3u, |ebml_w| {
|
|
ebml_w.emit_enum_variant_arg(0u, |ebml_w| {
|
|
ebml_w.emit_def_id(def_id)
|
|
});
|
|
ebml_w.emit_enum_variant_arg(1u, |ebml_w| {
|
|
ebml_w.emit_tys(ecx, *tys);
|
|
});
|
|
ebml_w.emit_enum_variant_arg(2u, |ebml_w| {
|
|
encode_vtable_res(ecx, ebml_w, vtable_res);
|
|
})
|
|
})
|
|
}
|
|
typeck::vtable_param(pn, bn) => {
|
|
ebml_w.emit_enum_variant("vtable_param", 1u, 2u, |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);
|
|
})
|
|
})
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
pub trait vtable_decoder_helpers {
|
|
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 vtable_decoder_helpers for reader::Decoder {
|
|
fn read_vtable_res(&mut self,
|
|
tcx: ty::ctxt, cdata: @cstore::crate_metadata)
|
|
-> typeck::vtable_res {
|
|
@self.read_to_vec(|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|
|
|
this.read_vtable_origin(tcx, cdata))
|
|
}
|
|
|
|
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_self"],
|
|
|this, i| {
|
|
match i {
|
|
0 => {
|
|
typeck::vtable_static(
|
|
this.read_enum_variant_arg(0u, |this| {
|
|
this.read_def_id_noxcx(cdata)
|
|
}),
|
|
this.read_enum_variant_arg(1u, |this| {
|
|
this.read_tys_noxcx(tcx, cdata)
|
|
}),
|
|
this.read_enum_variant_arg(2u, |this| {
|
|
this.read_vtable_res(tcx, cdata)
|
|
})
|
|
)
|
|
}
|
|
1 => {
|
|
typeck::vtable_param(
|
|
this.read_enum_variant_arg(0u, |this| {
|
|
Decodable::decode(this)
|
|
}),
|
|
this.read_enum_variant_arg(1u, |this| {
|
|
this.read_uint()
|
|
})
|
|
)
|
|
}
|
|
// hard to avoid - user input
|
|
_ => fail!("bad enum variant")
|
|
}
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
// ______________________________________________________________________
|
|
// Encoding and decoding the side tables
|
|
|
|
trait get_ty_str_ctxt {
|
|
fn ty_str_ctxt(&self) -> @tyencode::ctxt;
|
|
}
|
|
|
|
impl<'a> get_ty_str_ctxt for e::EncodeContext<'a> {
|
|
fn ty_str_ctxt(&self) -> @tyencode::ctxt {
|
|
@tyencode::ctxt {
|
|
diag: self.tcx.sess.diagnostic(),
|
|
ds: e::def_to_str,
|
|
tcx: self.tcx,
|
|
abbrevs: tyencode::ac_use_abbrevs(self.type_abbrevs)
|
|
}
|
|
}
|
|
}
|
|
|
|
trait ebml_writer_helpers {
|
|
fn emit_ty(&mut self, ecx: &e::EncodeContext, ty: ty::t);
|
|
fn emit_vstore(&mut self, ecx: &e::EncodeContext, vstore: ty::vstore);
|
|
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_tpbt(&mut self,
|
|
ecx: &e::EncodeContext,
|
|
tpbt: ty::ty_param_bounds_and_ty);
|
|
}
|
|
|
|
impl ebml_writer_helpers for writer::Encoder {
|
|
fn emit_ty(&mut self, ecx: &e::EncodeContext, ty: ty::t) {
|
|
self.emit_opaque(|this| e::write_type(ecx, this, ty))
|
|
}
|
|
|
|
fn emit_vstore(&mut self, ecx: &e::EncodeContext, vstore: ty::vstore) {
|
|
self.emit_opaque(|this| e::write_vstore(ecx, this, vstore))
|
|
}
|
|
|
|
fn emit_tys(&mut self, ecx: &e::EncodeContext, tys: &[ty::t]) {
|
|
self.emit_from_vec(tys, |this, ty| this.emit_ty(ecx, *ty))
|
|
}
|
|
|
|
fn emit_type_param_def(&mut self,
|
|
ecx: &e::EncodeContext,
|
|
type_param_def: &ty::TypeParameterDef) {
|
|
self.emit_opaque(|this| {
|
|
tyencode::enc_type_param_def(this.writer,
|
|
ecx.ty_str_ctxt(),
|
|
type_param_def)
|
|
})
|
|
}
|
|
|
|
fn emit_tpbt(&mut self,
|
|
ecx: &e::EncodeContext,
|
|
tpbt: ty::ty_param_bounds_and_ty) {
|
|
self.emit_struct("ty_param_bounds_and_ty", 2, |this| {
|
|
this.emit_struct_field("generics", 0, |this| {
|
|
this.emit_struct("Generics", 2, |this| {
|
|
this.emit_struct_field("type_param_defs", 0, |this| {
|
|
this.emit_from_vec(*tpbt.generics.type_param_defs,
|
|
|this, type_param_def| {
|
|
this.emit_type_param_def(ecx, type_param_def);
|
|
})
|
|
});
|
|
this.emit_struct_field("region_param_defs", 1, |this| {
|
|
tpbt.generics.region_param_defs.encode(this);
|
|
})
|
|
})
|
|
});
|
|
this.emit_struct_field("ty", 1, |this| {
|
|
this.emit_ty(ecx, tpbt.ty);
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
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 write_tag_and_id for writer::Encoder {
|
|
fn tag(&mut self, tag_id: c::astencode_tag, f: |&mut writer::Encoder|) {
|
|
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 {
|
|
ecx_ptr: *libc::c_void,
|
|
new_ebml_w: writer::Encoder,
|
|
maps: Maps,
|
|
}
|
|
|
|
impl ast_util::IdVisitingOperation for SideTableEncodingIdVisitor {
|
|
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.
|
|
let mut new_ebml_w = self.new_ebml_w.clone();
|
|
// See above
|
|
let ecx: &e::EncodeContext = unsafe {
|
|
cast::transmute(self.ecx_ptr)
|
|
};
|
|
encode_side_tables_for_id(ecx, self.maps, &mut new_ebml_w, id)
|
|
}
|
|
}
|
|
|
|
fn encode_side_tables_for_ii(ecx: &e::EncodeContext,
|
|
maps: Maps,
|
|
ebml_w: &mut writer::Encoder,
|
|
ii: &ast::inlined_item) {
|
|
ebml_w.start_tag(c::tag_table as uint);
|
|
let new_ebml_w = (*ebml_w).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 {
|
|
cast::transmute(ecx)
|
|
},
|
|
new_ebml_w: new_ebml_w,
|
|
maps: maps,
|
|
});
|
|
ebml_w.end_tag();
|
|
}
|
|
|
|
fn encode_side_tables_for_id(ecx: &e::EncodeContext,
|
|
maps: Maps,
|
|
ebml_w: &mut writer::Encoder,
|
|
id: ast::NodeId) {
|
|
let tcx = ecx.tcx;
|
|
|
|
debug!("Encoding side tables for id {}", id);
|
|
|
|
{
|
|
let r = tcx.def_map.find(&id);
|
|
for def in r.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));
|
|
})
|
|
}
|
|
}
|
|
|
|
{
|
|
let r = tcx.node_types.find(&(id as uint));
|
|
for &ty in r.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);
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
{
|
|
let r = tcx.node_type_substs.find(&id);
|
|
for tys in r.iter() {
|
|
ebml_w.tag(c::tag_table_node_type_subst, |ebml_w| {
|
|
ebml_w.id(id);
|
|
ebml_w.tag(c::tag_table_val, |ebml_w| {
|
|
ebml_w.emit_tys(ecx, **tys)
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
{
|
|
let r = tcx.freevars.find(&id);
|
|
for &fv in r.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, |ebml_w, fv_entry| {
|
|
encode_freevar_entry(ebml_w, *fv_entry)
|
|
})
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
let lid = ast::DefId { crate: ast::LOCAL_CRATE, node: id };
|
|
{
|
|
let r = tcx.tcache.find(&lid);
|
|
for &tpbt in r.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_tpbt(ecx, *tpbt);
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
{
|
|
let r = tcx.ty_param_defs.find(&id);
|
|
for &type_param_def in r.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 r = maps.method_map.find(&id);
|
|
for &mme in r.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_map_entry(ecx, ebml_w, *mme)
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
{
|
|
let r = maps.vtable_map.find(&id);
|
|
for &dr in r.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(ecx, ebml_w, *dr);
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
{
|
|
let r = tcx.adjustments.find(&id);
|
|
for adj in r.iter() {
|
|
ebml_w.tag(c::tag_table_adjustments, |ebml_w| {
|
|
ebml_w.id(id);
|
|
ebml_w.tag(c::tag_table_val, |ebml_w| {
|
|
(**adj).encode(ebml_w)
|
|
})
|
|
})
|
|
}
|
|
}
|
|
|
|
{
|
|
let r = maps.capture_map.find(&id);
|
|
for &cap_vars in r.iter() {
|
|
ebml_w.tag(c::tag_table_capture_map, |ebml_w| {
|
|
ebml_w.id(id);
|
|
ebml_w.tag(c::tag_table_val, |ebml_w| {
|
|
ebml_w.emit_from_vec(*cap_vars, |ebml_w, cap_var| {
|
|
cap_var.encode(ebml_w);
|
|
})
|
|
})
|
|
})
|
|
}
|
|
}
|
|
}
|
|
|
|
trait doc_decoder_helpers {
|
|
fn as_int(&self) -> int;
|
|
fn opt_child(&self, tag: c::astencode_tag) -> Option<ebml::Doc>;
|
|
}
|
|
|
|
impl doc_decoder_helpers for ebml::Doc {
|
|
fn as_int(&self) -> int { reader::doc_as_u64(*self) as int }
|
|
fn opt_child(&self, tag: c::astencode_tag) -> Option<ebml::Doc> {
|
|
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) -> ~[ty::t];
|
|
fn read_type_param_def(&mut self, xcx: @ExtendedDecodeContext)
|
|
-> ty::TypeParameterDef;
|
|
fn read_ty_param_bounds_and_ty(&mut self, xcx: @ExtendedDecodeContext)
|
|
-> ty::ty_param_bounds_and_ty;
|
|
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) -> ~[ty::t];
|
|
}
|
|
|
|
impl ebml_decoder_decoder_helpers for reader::Decoder {
|
|
fn read_ty_noxcx(&mut self,
|
|
tcx: ty::ctxt, cdata: @cstore::crate_metadata) -> ty::t {
|
|
self.read_opaque(|_, doc| {
|
|
tydecode::parse_ty_data(
|
|
*doc.data,
|
|
cdata.cnum,
|
|
doc.start,
|
|
tcx,
|
|
|_, id| decoder::translate_def_id(cdata, id))
|
|
})
|
|
}
|
|
|
|
fn read_tys_noxcx(&mut self,
|
|
tcx: ty::ctxt,
|
|
cdata: @cstore::crate_metadata) -> ~[ty::t] {
|
|
self.read_to_vec(|this| this.read_ty_noxcx(tcx, cdata) )
|
|
}
|
|
|
|
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));
|
|
|
|
ty
|
|
});
|
|
|
|
fn type_string(doc: ebml::Doc) -> ~str {
|
|
let mut str = ~"";
|
|
for i in range(doc.start, doc.end) {
|
|
str.push_char(doc.data[i] as char);
|
|
}
|
|
str
|
|
}
|
|
}
|
|
|
|
fn read_tys(&mut self, xcx: @ExtendedDecodeContext) -> ~[ty::t] {
|
|
self.read_to_vec(|this| this.read_ty(xcx) )
|
|
}
|
|
|
|
fn read_type_param_def(&mut self, xcx: @ExtendedDecodeContext)
|
|
-> ty::TypeParameterDef {
|
|
self.read_opaque(|this, doc| {
|
|
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))
|
|
})
|
|
}
|
|
|
|
fn read_ty_param_bounds_and_ty(&mut self, xcx: @ExtendedDecodeContext)
|
|
-> ty::ty_param_bounds_and_ty {
|
|
self.read_struct("ty_param_bounds_and_ty", 2, |this| {
|
|
ty::ty_param_bounds_and_ty {
|
|
generics: this.read_struct_field("generics", 0, |this| {
|
|
this.read_struct("Generics", 2, |this| {
|
|
ty::Generics {
|
|
type_param_defs:
|
|
this.read_struct_field("type_param_defs",
|
|
0,
|
|
|this| {
|
|
@this.read_to_vec(|this|
|
|
this.read_type_param_def(xcx))
|
|
}),
|
|
region_param_defs:
|
|
this.read_struct_field("region_param_defs",
|
|
1,
|
|
|this| {
|
|
Decodable::decode(this)
|
|
})
|
|
}
|
|
})
|
|
}),
|
|
ty: this.read_struct_field("ty", 1, |this| {
|
|
this.read_ty(xcx)
|
|
})
|
|
}
|
|
})
|
|
}
|
|
|
|
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));
|
|
}
|
|
Some(value) => {
|
|
let val_doc = entry_doc.get(c::tag_table_val as uint);
|
|
let mut val_dsr = reader::Decoder(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.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.insert(id as uint, ty);
|
|
}
|
|
c::tag_table_node_type_subst => {
|
|
let tys = val_dsr.read_tys(xcx);
|
|
dcx.tcx.node_type_substs.insert(id, tys);
|
|
}
|
|
c::tag_table_freevars => {
|
|
let fv_info = @val_dsr.read_to_vec(|val_dsr| {
|
|
@val_dsr.read_freevar_entry(xcx)
|
|
});
|
|
dcx.tcx.freevars.insert(id, fv_info);
|
|
}
|
|
c::tag_table_tcache => {
|
|
let tpbt = val_dsr.read_ty_param_bounds_and_ty(xcx);
|
|
let lid = ast::DefId { crate: ast::LOCAL_CRATE, node: id };
|
|
dcx.tcx.tcache.insert(lid, tpbt);
|
|
}
|
|
c::tag_table_param_defs => {
|
|
let bounds = val_dsr.read_type_param_def(xcx);
|
|
dcx.tcx.ty_param_defs.insert(id, bounds);
|
|
}
|
|
c::tag_table_method_map => {
|
|
dcx.maps.method_map.insert(
|
|
id,
|
|
val_dsr.read_method_map_entry(xcx));
|
|
}
|
|
c::tag_table_vtable_map => {
|
|
dcx.maps.vtable_map.insert(
|
|
id,
|
|
val_dsr.read_vtable_res(xcx.dcx.tcx, xcx.dcx.cdata));
|
|
}
|
|
c::tag_table_adjustments => {
|
|
let adj: @ty::AutoAdjustment = @Decodable::decode(val_dsr);
|
|
adj.tr(xcx);
|
|
dcx.tcx.adjustments.insert(id, adj);
|
|
}
|
|
c::tag_table_capture_map => {
|
|
let cvars =
|
|
at_vec::to_managed_move(
|
|
val_dsr.read_to_vec(
|
|
|val_dsr| val_dsr.read_capture_var(xcx)));
|
|
dcx.maps.capture_map.insert(id, cvars);
|
|
}
|
|
_ => {
|
|
xcx.dcx.tcx.sess.bug(
|
|
format!("unknown tag found in side tables: {:x}", tag));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
debug!(">< Side table doc loaded");
|
|
true
|
|
});
|
|
}
|
|
|
|
// ______________________________________________________________________
|
|
// Testing of astencode_gen
|
|
|
|
#[cfg(test)]
|
|
fn encode_item_ast(ebml_w: &mut writer::Encoder, item: @ast::item) {
|
|
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) -> @ast::item {
|
|
let chi_doc = par_doc.get(c::tag_tree as uint);
|
|
let mut d = reader::Decoder(chi_doc);
|
|
@Decodable::decode(&mut d)
|
|
}
|
|
|
|
#[cfg(test)]
|
|
trait fake_ext_ctxt {
|
|
fn cfg(&self) -> ast::CrateConfig;
|
|
fn parse_sess(&self) -> @mut parse::ParseSess;
|
|
fn call_site(&self) -> Span;
|
|
fn ident_of(&self, st: &str) -> ast::Ident;
|
|
}
|
|
|
|
#[cfg(test)]
|
|
type fake_session = @mut parse::ParseSess;
|
|
|
|
#[cfg(test)]
|
|
impl fake_ext_ctxt for fake_session {
|
|
fn cfg(&self) -> ast::CrateConfig { ~[] }
|
|
fn parse_sess(&self) -> @mut 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() -> @fake_ext_ctxt {
|
|
@parse::new_parse_sess(None) as @fake_ext_ctxt
|
|
}
|
|
|
|
#[cfg(test)]
|
|
fn roundtrip(in_item: Option<@ast::item>) {
|
|
use std::io::Decorator;
|
|
use std::io::mem::MemWriter;
|
|
|
|
let in_item = in_item.unwrap();
|
|
let wr = @mut MemWriter::new();
|
|
let mut ebml_w = writer::Encoder(wr);
|
|
encode_item_ast(&mut ebml_w, in_item);
|
|
let ebml_doc = reader::Doc(@wr.inner_ref().to_owned());
|
|
let out_item = decode_item_ast(ebml_doc);
|
|
|
|
assert_eq!(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_in = ast::ii_item(quote_item!(cx,
|
|
fn new_int_alist<B>() -> alist<int, B> {
|
|
fn eq_int(a: int, b: int) -> bool { a == b }
|
|
return alist {eq_fn: eq_int, data: ~[]};
|
|
}
|
|
).unwrap());
|
|
let item_out = simplify_ast(&item_in);
|
|
let item_exp = ast::ii_item(quote_item!(cx,
|
|
fn new_int_alist<B>() -> alist<int, B> {
|
|
return alist {eq_fn: eq_int, data: ~[]};
|
|
}
|
|
).unwrap());
|
|
match (item_out, item_exp) {
|
|
(ast::ii_item(item_out), ast::ii_item(item_exp)) => {
|
|
assert!(pprust::item_to_str(item_out,
|
|
token::get_ident_interner())
|
|
== pprust::item_to_str(item_exp,
|
|
token::get_ident_interner()));
|
|
}
|
|
_ => fail!()
|
|
}
|
|
}
|