128 lines
4.3 KiB
Rust
128 lines
4.3 KiB
Rust
// Searching for information from the cstore
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import syntax::ast;
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import middle::ty;
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import option::{some, none};
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import driver::session;
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export get_symbol;
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export get_type_param_count;
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export lookup_defs;
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export get_tag_variants;
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export get_impls_for_mod;
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export get_impl_methods;
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export get_type;
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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 result = [];
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for (c, data, def) in resolve_path(cstore, cnum, path) {
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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 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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log #fmt("resolve_path %s in crates[%d]:%s",
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str::connect(path, "::"), cnum, cm.name);
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let result = [];
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for def in decoder::resolve_path(path, cm.data) {
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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 anther 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_tag_variants(tcx: ty::ctxt, def: ast::def_id) -> [ty::variant_info] {
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let cstore = tcx.sess.get_cstore();
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let cnum = def.crate;
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let cdata = cstore::get_crate_data(cstore, cnum).data;
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let resolver = bind translate_def_id(cstore, cnum, _);
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ret decoder::get_tag_variants(cdata, def, tcx, resolver)
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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::t<ast::ident>)
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-> [@middle::resolve::_impl] {
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let cdata = cstore::get_crate_data(cstore, def.crate).data;
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let result = [];
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for did in decoder::get_impls_for_mod(cdata, def.node, def.crate) {
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let nm = decoder::lookup_item_name(cdata, did.node);
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if alt name { some(n) { n == nm } none. { true } } {
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result += [@{did: did,
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ident: nm,
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methods: decoder::lookup_impl_methods(
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cdata, did.node, did.crate)}];
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}
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}
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result
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}
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fn get_impl_methods(cstore: cstore::cstore, def: ast::def_id)
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-> [@middle::resolve::method_info] {
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let cdata = cstore::get_crate_data(cstore, def.crate).data;
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decoder::lookup_impl_methods(cdata, def.node, def.crate)
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}
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fn get_type(tcx: ty::ctxt, def: ast::def_id) -> ty::ty_param_kinds_and_ty {
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let cstore = tcx.sess.get_cstore();
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let cnum = def.crate;
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let cdata = cstore::get_crate_data(cstore, cnum).data;
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let resolver = bind translate_def_id(cstore, cnum, _);
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decoder::get_type(cdata, def, tcx, resolver)
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}
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// Translates a def_id from an external crate to a def_id for the current
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// compilation environment. We use this when trying to load types from
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// external crates - if those types further refer to types in other crates
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// then we must translate the crate number from that encoded in the external
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// crate to the correct local crate number.
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fn translate_def_id(cstore: cstore::cstore, searched_crate: ast::crate_num,
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def_id: ast::def_id) -> ast::def_id {
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let ext_cnum = def_id.crate;
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let node_id = def_id.node;
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assert (searched_crate != ast::local_crate);
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assert (ext_cnum != ast::local_crate);
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let cmeta = cstore::get_crate_data(cstore, searched_crate);
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let local_cnum =
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alt cmeta.cnum_map.find(ext_cnum) {
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option::some(n) { n }
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option::none. { fail "didn't find a crate in the cnum_map"; }
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};
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ret {crate: local_cnum, node: node_id};
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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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