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rustc: Add a str_eq lang item for pattern matching

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This commit is contained in:
Patrick Walton 2012-09-07 15:45:11 -07:00
parent 2572e80355
commit 1fcfee674a
3 changed files with 30 additions and 23 deletions
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1
src/libcore/str.rs
View File

@ -713,6 +713,7 @@ Section: Comparing strings
*/
/// Bytewise slice equality
#[lang="str_eq"]
pure fn eq_slice(a: &str, b: &str) -> bool {
do as_buf(a) |ap, alen| {
do as_buf(b) |bp, blen| {

1
src/rustc/metadata/encoder.rs
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@ -542,6 +542,7 @@ fn encode_info_for_item(ecx: @encode_ctxt, ebml_w: ebml::Writer, item: @item,
encode_type_param_bounds(ebml_w, ecx, tps);
encode_type(ecx, ebml_w, node_id_to_type(tcx, item.id));
encode_path(ecx, ebml_w, path, ast_map::path_name(item.ident));
encode_attributes(ebml_w, item.attrs);
if tps.len() > 0u || should_inline(item.attrs) {
ecx.encode_inlined_item(ecx, ebml_w, path, ii_item(item));
} else {

51
src/rustc/middle/lang_items.rs
View File

@ -13,8 +13,8 @@ use driver::session::session;
use metadata::csearch::{each_path, get_item_attrs};
use metadata::cstore::{iter_crate_data};
use metadata::decoder::{dl_def, dl_field, dl_impl};
use syntax::ast::{crate, def_id, def_ty, lit_str, meta_item, meta_list};
use syntax::ast::{meta_name_value, meta_word};
use syntax::ast::{crate, def_fn, def_id, def_ty, lit_str, meta_item};
use syntax::ast::{meta_list, meta_name_value, meta_word};
use syntax::ast_util::{local_def};
use syntax::visit::{default_simple_visitor, mk_simple_visitor};
use syntax::visit::{visit_crate, visit_item};
@ -23,26 +23,28 @@ use std::map::{hashmap, str_hash};
use str_eq = str::eq;
struct LanguageItems {
mut const_trait: Option<def_id>;
mut copy_trait: Option<def_id>;
mut send_trait: Option<def_id>;
mut owned_trait: Option<def_id>;
mut const_trait: Option<def_id>,
mut copy_trait: Option<def_id>,
mut send_trait: Option<def_id>,
mut owned_trait: Option<def_id>,
mut add_trait: Option<def_id>;
mut sub_trait: Option<def_id>;
mut mul_trait: Option<def_id>;
mut div_trait: Option<def_id>;
mut modulo_trait: Option<def_id>;
mut neg_trait: Option<def_id>;
mut bitxor_trait: Option<def_id>;
mut bitand_trait: Option<def_id>;
mut bitor_trait: Option<def_id>;
mut shl_trait: Option<def_id>;
mut shr_trait: Option<def_id>;
mut index_trait: Option<def_id>;
mut add_trait: Option<def_id>,
mut sub_trait: Option<def_id>,
mut mul_trait: Option<def_id>,
mut div_trait: Option<def_id>,
mut modulo_trait: Option<def_id>,
mut neg_trait: Option<def_id>,
mut bitxor_trait: Option<def_id>,
mut bitand_trait: Option<def_id>,
mut bitor_trait: Option<def_id>,
mut shl_trait: Option<def_id>,
mut shr_trait: Option<def_id>,
mut index_trait: Option<def_id>,
mut eq_trait: Option<def_id>;
mut ord_trait: Option<def_id>;
mut eq_trait: Option<def_id>,
mut ord_trait: Option<def_id>,
mut str_eq_fn: Option<def_id>
}
mod LanguageItems {
@ -67,7 +69,9 @@ mod LanguageItems {
index_trait: None,
eq_trait: None,
ord_trait: None
ord_trait: None,
str_eq_fn: None
}
}
}
@ -99,6 +103,8 @@ fn LanguageItemCollector(crate: @crate, session: session,
item_refs.insert(~"eq", &mut items.eq_trait);
item_refs.insert(~"ord", &mut items.ord_trait);
item_refs.insert(~"str_eq", &mut items.str_eq_fn);
LanguageItemCollector {
crate: crate,
session: session,
@ -117,7 +123,6 @@ struct LanguageItemCollector {
fn match_and_collect_meta_item(item_def_id: def_id,
meta_item: meta_item) {
match meta_item.node {
meta_name_value(key, literal) => {
match literal.node {
@ -183,7 +188,7 @@ struct LanguageItemCollector {
for each_path(crate_store, crate_number) |path_entry| {
let def_id;
match path_entry.def_like {
dl_def(def_ty(did)) => {
dl_def(def_ty(did)) | dl_def(def_fn(did, _)) => {
def_id = did;
}
dl_def(_) | dl_impl(_) | dl_field => {