164039e867
a module See the test case I added (issue-2316-c) for a concrete example. issue-2316 also contains the originally reported test case. resolve was using bitwise or instead of logical or when checking exports, resulting in excessively eager evaluation. A one-line fix that took six hours to isolate ;-)
194 lines
6.7 KiB
Rust
194 lines
6.7 KiB
Rust
// Searching for information from the cstore
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import std::{ebml};
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import syntax::ast;
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import syntax::ast_util;
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import middle::{ty, ast_map};
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import option::{some, none};
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import driver::session;
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import driver::session::expect;
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import middle::trans::common::maps;
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import common::*;
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import std::map::hashmap;
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export get_symbol;
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export get_class_fields;
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export get_class_method;
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export get_field_type;
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export get_type_param_count;
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export lookup_defs;
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export lookup_method_purity;
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export get_enum_variants;
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export get_impls_for_mod;
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export get_iface_methods;
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export get_type;
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export get_impl_iface;
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export get_impl_method;
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export get_item_path;
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export maybe_get_item_ast, found_ast, found, found_parent, not_found;
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fn get_symbol(cstore: cstore::cstore, def: ast::def_id) -> str {
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let cdata = cstore::get_crate_data(cstore, def.crate).data;
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ret decoder::get_symbol(cdata, def.node);
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}
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fn get_type_param_count(cstore: cstore::cstore, def: ast::def_id) -> uint {
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let cdata = cstore::get_crate_data(cstore, def.crate).data;
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ret decoder::get_type_param_count(cdata, def.node);
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}
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fn lookup_defs(cstore: cstore::cstore, cnum: ast::crate_num,
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path: [ast::ident]) -> [ast::def] {
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let mut result = [];
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#debug("lookup_defs: path = %? cnum = %?", path, cnum);
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for resolve_path(cstore, cnum, path).each {|elt|
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let (c, data, def) = elt;
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result += [decoder::lookup_def(c, data, def)];
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}
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ret result;
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}
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fn lookup_method_purity(cstore: cstore::cstore, did: ast::def_id)
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-> ast::purity {
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let cdata = cstore::get_crate_data(cstore, did.crate).data;
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alt check decoder::lookup_def(did.crate, cdata, did) {
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ast::def_fn(_, p) { p }
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}
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}
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/* Returns a vector of possible def IDs for a given path,
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in a given crate */
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fn resolve_path(cstore: cstore::cstore, cnum: ast::crate_num,
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path: [ast::ident]) ->
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[(ast::crate_num, @[u8], ast::def_id)] {
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let cm = cstore::get_crate_data(cstore, cnum);
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#debug("resolve_path %s in crates[%d]:%s",
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str::connect(path, "::"), cnum, cm.name);
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let mut result = [];
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for decoder::resolve_path(path, cm.data).each {|def|
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if def.crate == ast::local_crate {
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result += [(cnum, cm.data, def)];
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} else {
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if cm.cnum_map.contains_key(def.crate) {
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// This reexport is itself a reexport from another crate
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let next_cnum = cm.cnum_map.get(def.crate);
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let next_cm_data = cstore::get_crate_data(cstore, next_cnum);
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result += [(next_cnum, next_cm_data.data, def)];
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}
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}
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}
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ret result;
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}
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fn get_item_path(tcx: ty::ctxt, def: ast::def_id) -> ast_map::path {
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let cstore = tcx.sess.cstore;
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let cdata = cstore::get_crate_data(cstore, def.crate);
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let path = decoder::get_item_path(cdata, def.node);
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// FIXME #1920: This path is not always correct if the crate is not linked
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// into the root namespace.
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[ast_map::path_mod(cdata.name)] + path
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}
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enum found_ast {
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found(ast::inlined_item),
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found_parent(ast::def_id, ast::inlined_item),
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not_found,
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}
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// Finds the AST for this item in the crate metadata, if any. If the item was
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// not marked for inlining, then the AST will not be present and hence none
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// will be returned.
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fn maybe_get_item_ast(tcx: ty::ctxt, maps: maps, def: ast::def_id)
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-> found_ast {
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let cstore = tcx.sess.cstore;
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let cdata = cstore::get_crate_data(cstore, def.crate);
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decoder::maybe_get_item_ast(cdata, tcx, maps, def.node)
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}
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fn get_enum_variants(tcx: ty::ctxt, def: ast::def_id) -> [ty::variant_info] {
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let cstore = tcx.sess.cstore;
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let cdata = cstore::get_crate_data(cstore, def.crate);
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ret decoder::get_enum_variants(cdata, def.node, tcx)
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}
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fn get_impls_for_mod(cstore: cstore::cstore, def: ast::def_id,
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name: option<ast::ident>)
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-> @[@middle::resolve::_impl] {
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let cdata = cstore::get_crate_data(cstore, def.crate);
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decoder::get_impls_for_mod(cdata, def.node, name) {|cnum|
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cstore::get_crate_data(cstore, cnum)
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}
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}
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fn get_iface_methods(tcx: ty::ctxt, def: ast::def_id) -> @[ty::method] {
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let cstore = tcx.sess.cstore;
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let cdata = cstore::get_crate_data(cstore, def.crate);
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decoder::get_iface_methods(cdata, def.node, tcx)
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}
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fn get_class_fields(tcx: ty::ctxt, def: ast::def_id) -> [ty::field_ty] {
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let cstore = tcx.sess.cstore;
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let cdata = cstore::get_crate_data(cstore, def.crate);
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decoder::get_class_fields(cdata, def.node)
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}
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fn get_type(tcx: ty::ctxt, def: ast::def_id) -> ty::ty_param_bounds_and_ty {
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let cstore = tcx.sess.cstore;
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let cdata = cstore::get_crate_data(cstore, def.crate);
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decoder::get_type(cdata, def.node, tcx)
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}
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/* FIXME: Refactor */
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fn get_field_type(tcx: ty::ctxt, class_id: ast::def_id,
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def: ast::def_id) -> ty::ty_param_bounds_and_ty {
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let cstore = tcx.sess.cstore;
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let cdata = cstore::get_crate_data(cstore, class_id.crate);
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let all_items = ebml::get_doc(ebml::doc(cdata.data), tag_items);
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#debug("Looking up %?", class_id);
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let class_doc = expect(tcx.sess,
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decoder::maybe_find_item(class_id.node, all_items),
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{|| #fmt("get_field_type: class ID %? not found",
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class_id)});
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#debug("looking up %? : %?", def, class_doc);
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let the_field = expect(tcx.sess,
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decoder::maybe_find_item(def.node, class_doc),
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{|| #fmt("get_field_type: in class %?, field ID %? not found",
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class_id, def)});
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#debug("got field data %?", the_field);
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let ty = decoder::item_type(def, the_field, tcx, cdata);
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ret {bounds: @[], rp: ast::rp_none, ty: ty};
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}
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// Given a def_id for an impl or class, return the iface it implements,
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// or none if it's not for an impl or for a class that implements ifaces
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fn get_impl_iface(tcx: ty::ctxt, def: ast::def_id) -> option<ty::t> {
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let cstore = tcx.sess.cstore;
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let cdata = cstore::get_crate_data(cstore, def.crate);
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decoder::get_impl_iface(cdata, def.node, tcx)
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}
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fn get_impl_method(cstore: cstore::cstore, def: ast::def_id, mname: str)
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-> ast::def_id {
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let cdata = cstore::get_crate_data(cstore, def.crate);
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decoder::get_impl_method(cdata, def.node, mname)
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}
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/* Because classes use the iface format rather than the impl format
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for their methods (so that get_iface_methods can be reused to get
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class methods), classes require a slightly different version of
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get_impl_method. Sigh. */
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fn get_class_method(cstore: cstore::cstore, def: ast::def_id, mname: str)
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-> ast::def_id {
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let cdata = cstore::get_crate_data(cstore, def.crate);
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decoder::get_class_method(cdata, def.node, mname)
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}
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// Local Variables:
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// mode: rust
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// End:
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