}
}

// Expr for integer n.
func (c *typeConv) intExpr(n int64) ast.Expr {
	return &ast.BasicLit{
		Kind:  token.INT,
		Value: strconv.FormatInt(n, 10),
	}
}

// Add padding of given size to fld.
func (c *typeConv) pad(fld []*ast.Field, sizes []int64, size int64) ([]*ast.Field, []int64) {
	n := len(fld)
	fld = fld[0 : n+1]
	fld[n] = &ast.Field{Names: []*ast.Ident{c.Ident("_")}, Type: c.Opaque(size)}