sizeof

1 files changed, 11 insertions, 0 deletions

diff --git a/bootstrap/parse.c b/bootstrap/parse.c
index d55339d..4372cdc 100644
--- a/bootstrap/parse.c
+++ b/bootstrap/parse.c
@@ -922,6 +922,17 @@ pexprimary(struct parser *P) {
          ex = parsestructini(P, P->targty);
       else if (P->targty->t == TYarr)
          ex = parsearrini(P, P->targty);
+   } else if (lexmatch(P, &tok, TKkw_sizeof)) {
+      ex.t = Eintlit;
+      ex.ty = ty_usize;
+      if (lexmatch(P, &tok, '(')) {
+         struct expr exp = parseexpr(P);
+         ex.i = exp.ty->size;
+         lexexpect(P, ')');
+      } else {
+         const struct type *ty = parsetype(P);
+         ex.i = ty->size;
+      }
    } else {
       experr:
       fatal(P, tok.span, "expected expression (near %s)", tok2str(tok));