psym_if_expr_stmt
&& ps.psyms.sym[ps.psyms.len - 1] != psym_if_expr_stmt)
ps_psyms_replace2(psym_if_expr_stmt);
while (ps.psyms.sym[ps.psyms.len - 1] == psym_if_expr_stmt) {
if (ps.psyms.sym[ps.psyms.len - 1] != psym_if_expr_stmt) {