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Translate field expressions.

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This commit is contained in:
Graydon Hoare 2010-11-25 16:40:24 -08:00
parent 5678f5aa56
commit f0abe8f568
1 changed files with 21 additions and 0 deletions
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21
src/comp/middle/trans.rs
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@ -1159,6 +1159,22 @@ impure fn trans_tup(@block_ctxt cx, vec[tup(bool, @ast.expr)] args,
} }
impure fn trans_field(@block_ctxt cx, &ast.span sp, @ast.expr base,
&ast.ident field, &ast.ann ann) -> result {
auto r = trans_expr(cx, *base);
auto ty = typeck.expr_ty(base);
alt (ty.struct) {
case (typeck.ty_tup(?fields)) {
let uint ix = typeck.field_num(cx.fcx.ccx.sess, sp, field);
auto v = r.bcx.build.GEP(r.val, vec(C_int(ix as int)));
ret res(r.bcx, v);
}
}
cx.fcx.ccx.sess.unimpl("field variant in trans_field");
fail;
}
impure fn trans_expr(@block_ctxt cx, &ast.expr e) -> result { impure fn trans_expr(@block_ctxt cx, &ast.expr e) -> result {
alt (e.node) { alt (e.node) {
case (ast.expr_lit(?lit, _)) { case (ast.expr_lit(?lit, _)) {
@ -1225,6 +1241,11 @@ impure fn trans_expr(@block_ctxt cx, &ast.expr e) -> result {
case (ast.expr_tup(?args, ?ann)) { case (ast.expr_tup(?args, ?ann)) {
ret trans_tup(cx, args, ann); ret trans_tup(cx, args, ann);
} }
case (ast.expr_field(?base, ?ident, ?ann)) {
ret trans_field(cx, e.span, base, ident, ann);
}
} }
cx.fcx.ccx.sess.unimpl("expr variant in trans_expr"); cx.fcx.ccx.sess.unimpl("expr variant in trans_expr");
fail; fail;