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rustc: Implement "use mod"
This commit is contained in:
Patrick Walton
parent
28b1473f84
commit
6e7d5e1cbd
@ -1109,6 +1109,15 @@ type path_list_ident_ = {name: ident, id: node_id};
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#[auto_serialize]
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type path_list_ident = spanned<path_list_ident_>;
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#[auto_serialize]
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enum namespace { module_ns, type_value_ns }
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impl namespace : cmp::Eq {
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pure fn eq(&&other: namespace) -> bool {
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(self as uint) == (other as uint)
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}
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}
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#[auto_serialize]
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type view_path = spanned<view_path_>;
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@ -1120,7 +1129,7 @@ enum view_path_ {
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// or just
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//
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// foo::bar::baz (with 'baz =' implicitly on the left)
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view_path_simple(ident, @path, node_id),
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view_path_simple(ident, @path, namespace, node_id),
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// foo::bar::*
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view_path_glob(@path, node_id),
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@ -1152,12 +1161,7 @@ enum attr_style { attr_outer, attr_inner, }
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impl attr_style : cmp::Eq {
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pure fn eq(&&other: attr_style) -> bool {
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match (self, other) {
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(attr_outer, attr_outer) => true,
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(attr_inner, attr_inner) => true,
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(attr_outer, _) => false,
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(attr_inner, _) => false,
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}
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(self as uint) == (other as uint)
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}
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}
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@ -293,7 +293,7 @@ fn map_view_item(vi: @view_item, cx: ctx, _v: vt) {
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match vi.node {
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view_item_export(vps) => for vps.each |vp| {
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let (id, name) = match vp.node {
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view_path_simple(nm, _, id) => {
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view_path_simple(nm, _, _, id) => {
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(id, /* FIXME (#2543) */ copy nm)
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}
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view_path_glob(pth, id) | view_path_list(pth, _, id) => {
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@ -211,7 +211,7 @@ fn is_exported(i: ident, m: _mod) -> bool {
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has_explicit_exports = true;
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for vps.each |vp| {
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match vp.node {
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ast::view_path_simple(id, _, _) => {
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ast::view_path_simple(id, _, _, _) => {
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if id == i { return true; }
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match parent_enum {
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Some(parent_enum_id) => {
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@ -442,7 +442,7 @@ fn id_visitor(vfn: fn@(node_id)) -> visit::vt<()> {
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view_item_import(vps) | view_item_export(vps) => {
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do vec::iter(vps) |vp| {
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match vp.node {
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view_path_simple(_, _, id) => vfn(id),
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view_path_simple(_, _, _, id) => vfn(id),
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view_path_glob(_, id) => vfn(id),
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view_path_list(_, _, id) => vfn(id)
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}
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@ -602,7 +602,7 @@ fn walk_pat(pat: @pat, it: fn(@pat)) {
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fn view_path_id(p: @view_path) -> node_id {
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match p.node {
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view_path_simple(_, _, id) | view_path_glob(_, id) |
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view_path_simple(_, _, _, id) | view_path_glob(_, id) |
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view_path_list(_, _, id) => id
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}
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}
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@ -40,24 +40,25 @@ import ast::{_mod, add, alt_check, alt_exhaustive, arg, arm, attribute,
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lit_int_unsuffixed, lit_nil, lit_str, lit_uint, local, m_const,
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m_imm, m_mutbl, mac_, mac_aq, mac_ellipsis, mac_invoc,
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mac_invoc_tt, mac_var, matcher, match_nonterminal, match_seq,
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match_tok, method, mode, mt, mul, mutability, named_field, neg,
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noreturn, not, pat, pat_box, pat_enum, pat_ident, pat_lit,
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pat_range, pat_rec, pat_struct, pat_tup, pat_uniq, pat_wild,
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path, private, proto, proto_bare, proto_block, proto_box,
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proto_uniq, provided, public, pure_fn, purity, re_anon, re_named,
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region, rem, required, ret_style, return_val, self_ty, shl, shr,
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stmt, stmt_decl, stmt_expr, stmt_semi, struct_def, struct_field,
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struct_variant_kind, subtract, sty_box, sty_by_ref, sty_region,
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sty_static, sty_uniq, sty_value, token_tree, trait_method,
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trait_ref, tt_delim, tt_seq, tt_tok, tt_nonterminal, ty, ty_,
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ty_bot, ty_box, ty_field, ty_fn, ty_infer, ty_mac, ty_method,
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ty_nil, ty_param, ty_param_bound, ty_path, ty_ptr, ty_rec,
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ty_rptr, ty_tup, ty_u32, ty_uniq, ty_vec, ty_fixed_length,
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tuple_variant_kind, unchecked_blk, uniq, unnamed_field,
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unsafe_blk, unsafe_fn, variant, view_item, view_item_,
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view_item_export, view_item_import, view_item_use, view_path,
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view_path_glob, view_path_list, view_path_simple, visibility,
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vstore, vstore_box, vstore_fixed, vstore_slice, vstore_uniq};
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match_tok, method, mode, module_ns, mt, mul, mutability,
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named_field, neg, noreturn, not, pat, pat_box, pat_enum,
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pat_ident, pat_lit, pat_range, pat_rec, pat_struct, pat_tup,
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pat_uniq, pat_wild, path, private, proto, proto_bare,
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proto_block, proto_box, proto_uniq, provided, public, pure_fn,
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purity, re_anon, re_named, region, rem, required, ret_style,
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return_val, self_ty, shl, shr, stmt, stmt_decl, stmt_expr,
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stmt_semi, struct_def, struct_field, struct_variant_kind,
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subtract, sty_box, sty_by_ref, sty_region, sty_static, sty_uniq,
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sty_value, token_tree, trait_method, trait_ref, tt_delim, tt_seq,
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tt_tok, tt_nonterminal, tuple_variant_kind, ty, ty_, ty_bot,
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ty_box, ty_field, ty_fn, ty_infer, ty_mac, ty_method, ty_nil,
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ty_param, ty_param_bound, ty_path, ty_ptr, ty_rec, ty_rptr,
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ty_tup, ty_u32, ty_uniq, ty_vec, ty_fixed_length, type_value_ns,
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unchecked_blk, uniq, unnamed_field, unsafe_blk, unsafe_fn,
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variant, view_item, view_item_, view_item_export,
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view_item_import, view_item_use, view_path, view_path_glob,
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view_path_list, view_path_simple, visibility, vstore, vstore_box,
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vstore_fixed, vstore_slice, vstore_uniq};
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export file_type;
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export parser;
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@ -3336,6 +3337,14 @@ struct parser {
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fn parse_view_path() -> @view_path {
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let lo = self.span.lo;
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let namespace;
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if self.eat_keyword(~"mod") {
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namespace = module_ns;
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} else {
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namespace = type_value_ns;
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}
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let first_ident = self.parse_ident();
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let mut path = ~[first_ident];
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debug!("parsed view_path: %s", *self.id_to_str(first_ident));
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@ -3352,7 +3361,8 @@ struct parser {
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let path = @{span: mk_sp(lo, self.span.hi), global: false,
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idents: path, rp: None, types: ~[]};
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return @spanned(lo, self.span.hi,
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view_path_simple(first_ident, path, self.get_id()));
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view_path_simple(first_ident, path, namespace,
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self.get_id()));
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}
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token::MOD_SEP => {
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@ -3400,7 +3410,7 @@ struct parser {
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let path = @{span: mk_sp(lo, self.span.hi), global: false,
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idents: path, rp: None, types: ~[]};
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return @spanned(lo, self.span.hi,
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view_path_simple(last, path, self.get_id()));
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view_path_simple(last, path, namespace, self.get_id()));
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}
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fn parse_view_paths() -> ~[@view_path] {
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@ -468,11 +468,11 @@ fn print_item(s: ps, &&item: @ast::item) {
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ast::item_foreign_mod(nmod) => {
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head(s, ~"extern");
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match nmod.sort {
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ast::named => {
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word_nbsp(s, ~"mod");
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print_ident(s, item.ident)
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}
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ast::anonymous => {}
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ast::named => {
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word_nbsp(s, ~"mod");
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print_ident(s, item.ident);
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}
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ast::anonymous => {}
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}
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nbsp(s);
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bopen(s);
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@ -1687,7 +1687,10 @@ fn print_meta_item(s: ps, &&item: @ast::meta_item) {
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fn print_view_path(s: ps, &&vp: @ast::view_path) {
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match vp.node {
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ast::view_path_simple(ident, path, _) => {
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ast::view_path_simple(ident, path, namespace, _) => {
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if namespace == ast::module_ns {
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word_space(s, ~"mod");
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}
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if path.idents[vec::len(path.idents)-1u] != ident {
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print_ident(s, ident);
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space(s.s);
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@ -29,19 +29,19 @@ import syntax::ast::{foreign_item, foreign_item_const, foreign_item_fn, ge};
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import syntax::ast::{gt, ident, impure_fn, inherited, item, item_class};
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import syntax::ast::{item_const, item_enum, item_fn, item_foreign_mod};
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import syntax::ast::{item_impl, item_mac, item_mod, item_trait, item_ty, le};
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import syntax::ast::{local, local_crate, lt, method, mul, ne, neg, node_id};
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import syntax::ast::{pat, pat_enum, pat_ident, path, prim_ty, pat_box};
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import syntax::ast::{pat_lit, pat_range, pat_rec, pat_struct, pat_tup};
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import syntax::ast::{pat_uniq, pat_wild, private, provided, public, required};
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import syntax::ast::{rem, self_ty_, shl, shr, stmt_decl, struct_field};
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import syntax::ast::{struct_variant_kind, sty_static, subtract, trait_ref};
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import syntax::ast::{tuple_variant_kind, ty, ty_bool, ty_char, ty_f, ty_f32};
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import syntax::ast::{ty_f64, ty_float, ty_i, ty_i16, ty_i32, ty_i64, ty_i8};
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import syntax::ast::{ty_int, ty_param, ty_path, ty_str, ty_u, ty_u16, ty_u32};
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import syntax::ast::{ty_u64, ty_u8, ty_uint, variant, view_item};
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import syntax::ast::{view_item_export, view_item_import, view_item_use};
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import syntax::ast::{view_path_glob, view_path_list, view_path_simple};
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import syntax::ast::{visibility, anonymous, named};
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import syntax::ast::{local, local_crate, lt, method, module_ns, mul, ne, neg};
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import syntax::ast::{node_id, pat, pat_enum, pat_ident, path, prim_ty};
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import syntax::ast::{pat_box, pat_lit, pat_range, pat_rec, pat_struct};
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import syntax::ast::{pat_tup, pat_uniq, pat_wild, private, provided, public};
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import syntax::ast::{required, rem, self_ty_, shl, shr, stmt_decl};
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import syntax::ast::{struct_field, struct_variant_kind, sty_static, subtract};
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import syntax::ast::{trait_ref, tuple_variant_kind, ty, ty_bool, ty_char};
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import syntax::ast::{ty_f, ty_f32, ty_f64, ty_float, ty_i, ty_i16, ty_i32};
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import syntax::ast::{ty_i64, ty_i8, ty_int, ty_param, ty_path, ty_str, ty_u};
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import syntax::ast::{ty_u16, ty_u32, ty_u64, ty_u8, ty_uint, type_value_ns};
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import syntax::ast::{variant, view_item, view_item_export, view_item_import};
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import syntax::ast::{view_item_use, view_path_glob, view_path_list};
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import syntax::ast::{view_path_simple, visibility, anonymous, named};
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import syntax::ast_util::{def_id_of_def, dummy_sp, local_def, new_def_hash};
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import syntax::ast_util::{path_to_ident, walk_pat, trait_method_to_ty_method};
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import syntax::attr::{attr_metas, contains_name};
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@ -179,9 +179,20 @@ impl ModuleDef {
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}
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}
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enum ImportDirectiveNS {
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ModuleNSOnly,
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AnyNS
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}
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impl ImportDirectiveNS : cmp::Eq {
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pure fn eq(&&other: ImportDirectiveNS) -> bool {
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(self as uint) == (other as uint)
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}
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}
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/// Contains data for specific types of import directives.
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enum ImportDirectiveSubclass {
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SingleImport(Atom /* target */, Atom /* source */),
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SingleImport(Atom /* target */, Atom /* source */, ImportDirectiveNS),
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GlobImport
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}
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@ -1123,7 +1134,7 @@ struct Resolver {
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let module_path = @DVec();
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match view_path.node {
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view_path_simple(_, full_path, _) => {
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view_path_simple(_, full_path, _, _) => {
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let path_len = full_path.idents.len();
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assert path_len != 0u;
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@ -1145,10 +1156,16 @@ struct Resolver {
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// Build up the import directives.
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let module_ = self.get_module_from_parent(parent);
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match view_path.node {
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view_path_simple(binding, full_path, _) => {
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view_path_simple(binding, full_path, ns, _) => {
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let ns = match ns {
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module_ns => ModuleNSOnly,
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type_value_ns => AnyNS
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};
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let source_ident = full_path.idents.last();
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let subclass = @SingleImport(binding,
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source_ident);
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source_ident,
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ns);
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self.build_import_directive(module_,
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module_path,
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subclass,
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@ -1157,7 +1174,9 @@ struct Resolver {
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view_path_list(_, source_idents, _) => {
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for source_idents.each |source_ident| {
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let name = source_ident.node.name;
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let subclass = @SingleImport(name, name);
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let subclass = @SingleImport(name,
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name,
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AnyNS);
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self.build_import_directive(module_,
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module_path,
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subclass,
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@ -1178,7 +1197,7 @@ struct Resolver {
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let module_ = self.get_module_from_parent(parent);
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for view_paths.each |view_path| {
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match view_path.node {
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view_path_simple(ident, full_path, ident_id) => {
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view_path_simple(ident, full_path, _, ident_id) => {
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let last_ident = full_path.idents.last();
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if last_ident != ident {
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self.session.span_err(view_item.span,
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@ -1522,7 +1541,7 @@ struct Resolver {
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// the appropriate flag.
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match *subclass {
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SingleImport(target, _) => {
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SingleImport(target, _, _) => {
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match module_.import_resolutions.find(target) {
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Some(resolution) => {
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resolution.outstanding_references += 1u;
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@ -1699,13 +1718,19 @@ struct Resolver {
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// within. Attempt to resolve the import within it.
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match *import_directive.subclass {
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SingleImport(target, source) => {
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SingleImport(target, source, AnyNS) => {
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resolution_result =
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self.resolve_single_import(module_,
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containing_module,
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target,
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source);
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}
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SingleImport(target, source, ModuleNSOnly) => {
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resolution_result =
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self.resolve_single_module_import
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(module_, containing_module, target,
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source);
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}
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GlobImport => {
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let span = import_directive.span;
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resolution_result =
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@ -1749,8 +1774,10 @@ struct Resolver {
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return resolution_result;
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}
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fn resolve_single_import(module_: @Module, containing_module: @Module,
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target: Atom, source: Atom)
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fn resolve_single_import(module_: @Module,
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containing_module: @Module,
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target: Atom,
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source: Atom)
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-> ResolveResult<()> {
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debug!("(resolving single import) resolving `%s` = `%s::%s` from \
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@ -1937,6 +1964,137 @@ struct Resolver {
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return Success(());
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}
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fn resolve_single_module_import(module_: @Module,
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containing_module: @Module,
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target: Atom,
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source: Atom)
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-> ResolveResult<()> {
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debug!("(resolving single module import) resolving `%s` = `%s::%s` \
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from `%s`",
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self.session.str_of(target),
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self.module_to_str(containing_module),
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self.session.str_of(source),
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self.module_to_str(module_));
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if !self.name_is_exported(containing_module, source) {
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debug!("(resolving single import) name `%s` is unexported",
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self.session.str_of(source));
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return Failed;
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}
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// We need to resolve the module namespace for this to succeed.
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let mut module_result = UnknownResult;
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// Search for direct children of the containing module.
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match containing_module.children.find(source) {
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None => {
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// Continue.
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}
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Some(child_name_bindings) => {
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if (*child_name_bindings).defined_in_namespace(ModuleNS) {
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module_result = BoundResult(containing_module,
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child_name_bindings);
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}
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}
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}
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// Unless we managed to find a result, search imports as well.
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match module_result {
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BoundResult(*) => {
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// Continue.
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}
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_ => {
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// If there is an unresolved glob at this point in the
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// containing module, bail out. We don't know enough to be
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// able to resolve this import.
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if containing_module.glob_count > 0u {
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debug!("(resolving single module import) unresolved \
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glob; bailing out");
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return Indeterminate;
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}
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// Now search the exported imports within the containing
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// module.
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match containing_module.import_resolutions.find(source) {
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None => {
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// The containing module definitely doesn't have an
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// exported import with the name in question. We can
|
||||
// therefore accurately report that the names are
|
||||
// unbound.
|
||||
|
||||
if module_result.is_unknown() {
|
||||
module_result = UnboundResult;
|
||||
}
|
||||
}
|
||||
Some(import_resolution)
|
||||
if import_resolution.outstanding_references
|
||||
== 0u => {
|
||||
// The name is an import which has been fully
|
||||
// resolved. We can, therefore, just follow it.
|
||||
|
||||
if module_result.is_unknown() {
|
||||
match (*import_resolution).
|
||||
target_for_namespace(ModuleNS) {
|
||||
None => {
|
||||
module_result = UnboundResult;
|
||||
}
|
||||
Some(target) => {
|
||||
import_resolution.used = true;
|
||||
module_result = BoundResult
|
||||
(target.target_module,
|
||||
target.bindings);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
Some(_) => {
|
||||
// The import is unresolved. Bail out.
|
||||
debug!("(resolving single module import) unresolved \
|
||||
import; bailing out");
|
||||
return Indeterminate;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// We've successfully resolved the import. Write the results in.
|
||||
assert module_.import_resolutions.contains_key(target);
|
||||
let import_resolution = module_.import_resolutions.get(target);
|
||||
|
||||
match module_result {
|
||||
BoundResult(target_module, name_bindings) => {
|
||||
debug!("(resolving single import) found module binding");
|
||||
import_resolution.module_target =
|
||||
Some(Target(target_module, name_bindings));
|
||||
}
|
||||
UnboundResult => {
|
||||
debug!("(resolving single import) didn't find module \
|
||||
binding");
|
||||
}
|
||||
UnknownResult => {
|
||||
fail ~"module result should be known at this point";
|
||||
}
|
||||
}
|
||||
|
||||
let i = import_resolution;
|
||||
if i.module_target.is_none() {
|
||||
// If this name wasn't found in the module namespace, it's
|
||||
// definitely unresolved.
|
||||
return Failed;
|
||||
}
|
||||
|
||||
assert import_resolution.outstanding_references >= 1u;
|
||||
import_resolution.outstanding_references -= 1u;
|
||||
|
||||
debug!("(resolving single module import) successfully resolved \
|
||||
import");
|
||||
return Success(());
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Resolves a glob import. Note that this function cannot fail; it either
|
||||
* succeeds or bails out (as importing * from an empty module or a module
|
||||
@ -2384,10 +2542,12 @@ struct Resolver {
|
||||
|
||||
let mut target_name;
|
||||
let mut source_name;
|
||||
let allowable_namespaces;
|
||||
match *import_directive.subclass {
|
||||
SingleImport(target, source) => {
|
||||
SingleImport(target, source, namespaces) => {
|
||||
target_name = target;
|
||||
source_name = source;
|
||||
allowable_namespaces = namespaces;
|
||||
}
|
||||
GlobImport => {
|
||||
fail ~"found `import *`, which is invalid";
|
||||
@ -2407,8 +2567,8 @@ struct Resolver {
|
||||
let mut module_result;
|
||||
debug!("(resolving one-level naming result) searching for module");
|
||||
match self.resolve_item_in_lexical_scope(module_,
|
||||
source_name,
|
||||
ModuleNS) {
|
||||
source_name,
|
||||
ModuleNS) {
|
||||
|
||||
Failed => {
|
||||
debug!("(resolving one-level renaming import) didn't find \
|
||||
@ -2428,48 +2588,53 @@ struct Resolver {
|
||||
}
|
||||
|
||||
let mut value_result;
|
||||
debug!("(resolving one-level naming result) searching for value");
|
||||
match self.resolve_item_in_lexical_scope(module_,
|
||||
source_name,
|
||||
ValueNS) {
|
||||
|
||||
Failed => {
|
||||
debug!("(resolving one-level renaming import) didn't find \
|
||||
value result");
|
||||
value_result = None;
|
||||
}
|
||||
Indeterminate => {
|
||||
debug!("(resolving one-level renaming import) value result \
|
||||
is indeterminate; bailing");
|
||||
return Indeterminate;
|
||||
}
|
||||
Success(name_bindings) => {
|
||||
debug!("(resolving one-level renaming import) value result \
|
||||
found");
|
||||
value_result = Some(copy name_bindings);
|
||||
}
|
||||
}
|
||||
|
||||
let mut type_result;
|
||||
debug!("(resolving one-level naming result) searching for type");
|
||||
match self.resolve_item_in_lexical_scope(module_,
|
||||
source_name,
|
||||
TypeNS) {
|
||||
if allowable_namespaces == ModuleNSOnly {
|
||||
value_result = None;
|
||||
type_result = None;
|
||||
} else {
|
||||
debug!("(resolving one-level naming result) searching for value");
|
||||
match self.resolve_item_in_lexical_scope(module_,
|
||||
source_name,
|
||||
ValueNS) {
|
||||
|
||||
Failed => {
|
||||
debug!("(resolving one-level renaming import) didn't find \
|
||||
type result");
|
||||
type_result = None;
|
||||
Failed => {
|
||||
debug!("(resolving one-level renaming import) didn't \
|
||||
find value result");
|
||||
value_result = None;
|
||||
}
|
||||
Indeterminate => {
|
||||
debug!("(resolving one-level renaming import) value \
|
||||
result is indeterminate; bailing");
|
||||
return Indeterminate;
|
||||
}
|
||||
Success(name_bindings) => {
|
||||
debug!("(resolving one-level renaming import) value \
|
||||
result found");
|
||||
value_result = Some(copy name_bindings);
|
||||
}
|
||||
}
|
||||
Indeterminate => {
|
||||
debug!("(resolving one-level renaming import) type result is \
|
||||
indeterminate; bailing");
|
||||
return Indeterminate;
|
||||
}
|
||||
Success(name_bindings) => {
|
||||
debug!("(resolving one-level renaming import) type result \
|
||||
found");
|
||||
type_result = Some(copy name_bindings);
|
||||
|
||||
debug!("(resolving one-level naming result) searching for type");
|
||||
match self.resolve_item_in_lexical_scope(module_,
|
||||
source_name,
|
||||
TypeNS) {
|
||||
|
||||
Failed => {
|
||||
debug!("(resolving one-level renaming import) didn't \
|
||||
find type result");
|
||||
type_result = None;
|
||||
}
|
||||
Indeterminate => {
|
||||
debug!("(resolving one-level renaming import) type \
|
||||
result is indeterminate; bailing");
|
||||
return Indeterminate;
|
||||
}
|
||||
Success(name_bindings) => {
|
||||
debug!("(resolving one-level renaming import) type \
|
||||
result found");
|
||||
type_result = Some(copy name_bindings);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -39,7 +39,7 @@ fn traverse_exports(cx: ctx, vis: ~[@view_item]) -> bool {
|
||||
found_export = true;
|
||||
for vec::each(vps) |vp| {
|
||||
match vp.node {
|
||||
view_path_simple(_, _, id) | view_path_glob(_, id) |
|
||||
view_path_simple(_, _, _, id) | view_path_glob(_, id) |
|
||||
view_path_list(_, _, id) => {
|
||||
traverse_export(cx, id);
|
||||
}
|
||||
|
||||
12
src/test/run-pass/use-mod.rs
Normal file
12
src/test/run-pass/use-mod.rs
Normal file
@ -0,0 +1,12 @@
|
||||
use mod a::b;
|
||||
|
||||
mod a {
|
||||
mod b {
|
||||
fn f() {}
|
||||
}
|
||||
}
|
||||
|
||||
fn main() {
|
||||
b::f();
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user