385 lines
12 KiB
Rust
385 lines
12 KiB
Rust
use std::map;
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use std::map::HashMap;
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use ast::*;
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use print::pprust;
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use ast_util::{path_to_ident, stmt_id};
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use diagnostic::span_handler;
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use parse::token::ident_interner;
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enum path_elt {
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path_mod(ident),
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path_name(ident)
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}
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impl path_elt : cmp::Eq {
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pure fn eq(other: &path_elt) -> bool {
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match self {
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path_mod(e0a) => {
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match (*other) {
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path_mod(e0b) => e0a == e0b,
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_ => false
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}
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}
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path_name(e0a) => {
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match (*other) {
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path_name(e0b) => e0a == e0b,
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_ => false
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}
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}
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}
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}
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pure fn ne(other: &path_elt) -> bool { !self.eq(other) }
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}
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type path = ~[path_elt];
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/* FIXMEs that say "bad" are as per #2543 */
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fn path_to_str_with_sep(p: path, sep: ~str, itr: @ident_interner) -> ~str {
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let strs = do vec::map(p) |e| {
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match *e {
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path_mod(s) => *itr.get(s),
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path_name(s) => *itr.get(s)
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}
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};
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str::connect(strs, sep)
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}
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fn path_ident_to_str(p: path, i: ident, itr: @ident_interner) -> ~str {
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if vec::is_empty(p) {
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//FIXME /* FIXME (#2543) */ copy *i
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*itr.get(i)
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} else {
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fmt!("%s::%s", path_to_str(p, itr), *itr.get(i))
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}
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}
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fn path_to_str(p: path, itr: @ident_interner) -> ~str {
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path_to_str_with_sep(p, ~"::", itr)
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}
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enum ast_node {
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node_item(@item, @path),
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node_foreign_item(@foreign_item, foreign_abi, @path),
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node_trait_method(@trait_method, def_id /* trait did */,
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@path /* path to the trait */),
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node_method(@method, def_id /* impl did */, @path /* path to the impl */),
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node_variant(variant, @item, @path),
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node_expr(@expr),
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node_stmt(@stmt),
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node_export(@view_path, @path),
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// Locals are numbered, because the alias analysis needs to know in which
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// order they are introduced.
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node_arg(arg, uint),
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node_local(uint),
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// Destructor for a class
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node_dtor(~[ty_param], @class_dtor, def_id, @path),
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node_block(blk),
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}
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type map = std::map::HashMap<node_id, ast_node>;
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type ctx = {map: map, mut path: path,
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mut local_id: uint, diag: span_handler};
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type vt = visit::vt<ctx>;
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fn extend(cx: ctx, +elt: ident) -> @path {
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@(vec::append(cx.path, ~[path_name(elt)]))
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}
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fn mk_ast_map_visitor() -> vt {
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return visit::mk_vt(@{
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visit_item: map_item,
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visit_expr: map_expr,
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visit_stmt: map_stmt,
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visit_fn: map_fn,
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visit_local: map_local,
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visit_arm: map_arm,
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visit_view_item: map_view_item,
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visit_block: map_block,
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.. *visit::default_visitor()
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});
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}
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fn map_crate(diag: span_handler, c: crate) -> map {
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let cx = {map: std::map::HashMap(),
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mut path: ~[],
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mut local_id: 0u,
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diag: diag};
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visit::visit_crate(c, cx, mk_ast_map_visitor());
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return cx.map;
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}
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// Used for items loaded from external crate that are being inlined into this
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// crate. The `path` should be the path to the item but should not include
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// the item itself.
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fn map_decoded_item(diag: span_handler,
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map: map, +path: path, ii: inlined_item) {
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// I believe it is ok for the local IDs of inlined items from other crates
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// to overlap with the local ids from this crate, so just generate the ids
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// starting from 0. (In particular, I think these ids are only used in
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// alias analysis, which we will not be running on the inlined items, and
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// even if we did I think it only needs an ordering between local
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// variables that are simultaneously in scope).
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let cx = {map: map,
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mut path: /* FIXME (#2543) */ copy path,
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mut local_id: 0u,
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diag: diag};
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let v = mk_ast_map_visitor();
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// methods get added to the AST map when their impl is visited. Since we
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// don't decode and instantiate the impl, but just the method, we have to
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// add it to the table now:
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match ii {
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ii_item(*) | ii_dtor(*) => { /* fallthrough */ }
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ii_foreign(i) => {
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cx.map.insert(i.id, node_foreign_item(i, foreign_abi_rust_intrinsic,
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@path));
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}
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ii_method(impl_did, m) => {
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map_method(impl_did, @path, m, cx);
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}
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}
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// visit the item / method contents and add those to the map:
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ii.accept(cx, v);
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}
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fn map_fn(fk: visit::fn_kind, decl: fn_decl, body: blk,
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sp: codemap::span, id: node_id, cx: ctx, v: vt) {
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for decl.inputs.each |a| {
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cx.map.insert(a.id,
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node_arg(/* FIXME (#2543) */
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copy *a, cx.local_id));
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cx.local_id += 1u;
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}
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match fk {
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visit::fk_dtor(tps, attrs, self_id, parent_id) => {
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let dt = @{node: {id: id, attrs: attrs, self_id: self_id,
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body: /* FIXME (#2543) */ copy body}, span: sp};
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cx.map.insert(id, node_dtor(/* FIXME (#2543) */ copy tps, dt,
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parent_id,
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@/* FIXME (#2543) */ copy cx.path));
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}
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_ => ()
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}
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visit::visit_fn(fk, decl, body, sp, id, cx, v);
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}
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fn map_block(b: blk, cx: ctx, v: vt) {
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cx.map.insert(b.node.id, node_block(/* FIXME (#2543) */ copy b));
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visit::visit_block(b, cx, v);
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}
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fn number_pat(cx: ctx, pat: @pat) {
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do ast_util::walk_pat(pat) |p| {
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match p.node {
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pat_ident(*) => {
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cx.map.insert(p.id, node_local(cx.local_id));
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cx.local_id += 1u;
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}
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_ => ()
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}
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};
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}
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fn map_local(loc: @local, cx: ctx, v: vt) {
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number_pat(cx, loc.node.pat);
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visit::visit_local(loc, cx, v);
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}
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fn map_arm(arm: arm, cx: ctx, v: vt) {
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number_pat(cx, arm.pats[0]);
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visit::visit_arm(arm, cx, v);
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}
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fn map_method(impl_did: def_id, impl_path: @path,
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m: @method, cx: ctx) {
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cx.map.insert(m.id, node_method(m, impl_did, impl_path));
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cx.map.insert(m.self_id, node_local(cx.local_id));
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cx.local_id += 1u;
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}
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fn map_item(i: @item, cx: ctx, v: vt) {
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let item_path = @/* FIXME (#2543) */ copy cx.path;
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cx.map.insert(i.id, node_item(i, item_path));
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match i.node {
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item_impl(_, _, _, ms) => {
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let impl_did = ast_util::local_def(i.id);
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for ms.each |m| {
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map_method(impl_did, extend(cx, i.ident), *m,
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cx);
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}
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}
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item_enum(enum_definition, _) => {
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for enum_definition.variants.each |v| {
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cx.map.insert(v.node.id, node_variant(
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/* FIXME (#2543) */ copy *v, i,
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extend(cx, i.ident)));
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}
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}
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item_foreign_mod(nm) => {
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let abi = match attr::foreign_abi(i.attrs) {
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either::Left(msg) => cx.diag.span_fatal(i.span, msg),
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either::Right(abi) => abi
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};
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for nm.items.each |nitem| {
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cx.map.insert(nitem.id,
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node_foreign_item(*nitem, abi,
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/* FIXME (#2543) */
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if nm.sort == ast::named {
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extend(cx, i.ident)
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}
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else {
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/* Anonymous extern mods go
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in the parent scope */
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@copy cx.path
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}));
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}
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}
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item_class(struct_def, _) => {
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map_struct_def(struct_def, node_item(i, item_path), i.ident, i.id, cx,
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v);
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}
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item_trait(_, traits, methods) => {
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// Map trait refs to their parent classes. This is
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// so we can find the self_ty
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for traits.each |p| {
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cx.map.insert(p.ref_id, node_item(i, item_path));
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// This is so we can look up the right things when
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// encoding/decoding
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cx.map.insert(p.impl_id, node_item(i, item_path));
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}
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for methods.each |tm| {
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let id = ast_util::trait_method_to_ty_method(*tm).id;
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let d_id = ast_util::local_def(i.id);
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cx.map.insert(id, node_trait_method(@*tm, d_id, item_path));
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}
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}
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_ => ()
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}
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match i.node {
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item_mod(_) | item_foreign_mod(_) => {
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cx.path.push(path_mod(i.ident));
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}
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_ => cx.path.push(path_name(i.ident))
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}
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visit::visit_item(i, cx, v);
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cx.path.pop();
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}
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fn map_struct_def(struct_def: @ast::struct_def, parent_node: ast_node,
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ident: ast::ident, id: ast::node_id, cx: ctx, _v: vt) {
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// Map trait refs to their parent classes. This is
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// so we can find the self_ty
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for struct_def.traits.each |p| {
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cx.map.insert(p.ref_id, parent_node);
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// This is so we can look up the right things when
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// encoding/decoding
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cx.map.insert(p.impl_id, parent_node);
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}
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let d_id = ast_util::local_def(id);
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let p = extend(cx, ident);
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// only need to handle methods
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for vec::each(struct_def.methods) |m| {
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map_method(d_id, p, *m, cx);
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}
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}
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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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(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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(id, path_to_ident(pth))
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}
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};
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cx.map.insert(id, node_export(*vp, extend(cx, name)));
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},
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_ => ()
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}
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}
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fn map_expr(ex: @expr, cx: ctx, v: vt) {
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cx.map.insert(ex.id, node_expr(ex));
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visit::visit_expr(ex, cx, v);
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}
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fn map_stmt(stmt: @stmt, cx: ctx, v: vt) {
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cx.map.insert(stmt_id(*stmt), node_stmt(stmt));
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visit::visit_stmt(stmt, cx, v);
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}
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fn node_id_to_str(map: map, id: node_id, itr: @ident_interner) -> ~str {
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match map.find(id) {
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None => {
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fmt!("unknown node (id=%d)", id)
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}
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Some(node_item(item, path)) => {
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let path_str = path_ident_to_str(*path, item.ident, itr);
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let item_str = match item.node {
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item_const(*) => ~"const",
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item_fn(*) => ~"fn",
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item_mod(*) => ~"mod",
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item_foreign_mod(*) => ~"foreign mod",
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item_ty(*) => ~"ty",
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item_enum(*) => ~"enum",
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item_class(*) => ~"class",
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item_trait(*) => ~"trait",
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item_impl(*) => ~"impl",
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item_mac(*) => ~"macro"
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};
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fmt!("%s %s (id=%?)", item_str, path_str, id)
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}
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Some(node_foreign_item(item, abi, path)) => {
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fmt!("foreign item %s with abi %? (id=%?)",
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path_ident_to_str(*path, item.ident, itr), abi, id)
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}
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Some(node_method(m, _, path)) => {
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fmt!("method %s in %s (id=%?)",
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*itr.get(m.ident), path_to_str(*path, itr), id)
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}
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Some(node_trait_method(tm, _, path)) => {
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let m = ast_util::trait_method_to_ty_method(*tm);
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fmt!("method %s in %s (id=%?)",
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*itr.get(m.ident), path_to_str(*path, itr), id)
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}
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Some(node_variant(variant, _, path)) => {
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fmt!("variant %s in %s (id=%?)",
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*itr.get(variant.node.name), path_to_str(*path, itr), id)
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}
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Some(node_expr(expr)) => {
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fmt!("expr %s (id=%?)", pprust::expr_to_str(expr, itr), id)
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}
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Some(node_stmt(stmt)) => {
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fmt!("stmt %s (id=%?)",
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pprust::stmt_to_str(*stmt, itr), id)
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}
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// FIXMEs are as per #2410
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Some(node_export(_, path)) => {
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fmt!("export %s (id=%?)", // add more info here
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path_to_str(*path, itr), id)
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}
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Some(node_arg(_, _)) => { // add more info here
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fmt!("arg (id=%?)", id)
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}
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Some(node_local(_)) => { // add more info here
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fmt!("local (id=%?)", id)
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}
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Some(node_dtor(*)) => { // add more info here
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fmt!("node_dtor (id=%?)", id)
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}
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Some(node_block(_)) => {
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fmt!("block")
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}
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}
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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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