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Teach trans to emit undefined references to 'use'd symbols. Can compile and run a simple 'use std;' example now.

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This commit is contained in:
Graydon Hoare 2011-03-29 13:21:16 -07:00
parent 6936093992
commit 734abe593d
4 changed files with 61 additions and 0 deletions
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21
src/comp/middle/trans.rs
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@ -11,6 +11,7 @@ import std.option.some;
import std.option.none;
import front.ast;
import front.creader;
import driver.session;
import middle.ty;
import back.x86;
@ -3606,10 +3607,30 @@ fn lval_generic_fn(@block_ctxt cx,
ret lv;
}
fn trans_external_path(@block_ctxt cx, &ast.path p,
ast.def def, ast.ann a) -> lval_result {
auto ccx = cx.fcx.ccx;
auto ty = node_ann_type(ccx, a);
auto name = creader.get_symbol(ccx.sess, ast.def_id_of_def(def));
auto v = get_extern_const(ccx.externs, ccx.llmod,
name, type_of(ccx, ty));
ret lval_mem(cx, v);
}
fn def_is_external(@crate_ctxt cx, ast.def d) -> bool {
auto id = ast.def_id_of_def(d);
ret id._0 != cx.sess.get_targ_crate_num();
}
fn trans_path(@block_ctxt cx, &ast.path p, &option.t[ast.def] dopt,
&ast.ann ann) -> lval_result {
alt (dopt) {
case (some[ast.def](?def)) {
if (def_is_external(cx.fcx.ccx, def)) {
ret trans_external_path(cx, p, def, ann);
}
alt (def) {
case (ast.def_arg(?did)) {
alt (cx.fcx.llargs.find(did)) {