to_int_constant
dcs_add_alignas(to_int_constant($3, true));
$$ = set_bit_field_width($1, to_int_constant($3, true));
$$ = set_bit_field_width(NULL, to_int_constant($3, true));
$$ = set_bit_field_width($1, to_int_constant($3, true));
$$ = set_bit_field_width(NULL, to_int_constant($3, true));
$$ = enumeration_constant($1, to_int_constant($4, true),
$$.dim = $3 == NULL ? 0 : to_int_constant($3, false);
$$.dim = $1 == NULL ? 0 : to_int_constant($1, false);
$$.lo = to_int_constant($1, true);
$$.lo = to_int_constant($1, true);
$$.hi = to_int_constant($3, true);
dcs_add_alignas(to_int_constant($3->args[0], true));
int to_int_constant(tnode_t *, bool);