func Eval(tree ast.Node) (*big.Rat, error) {
switch node := tree.(type) {
case *ast.Number:
return parseNumNode(node)
case *ast.BaseNode:
return evalNodes(tree.Children())
default:
return nil, fmt.Errorf("Unkown node type: %T", tree)
}
}
func Eval(tree ast.Node) (*big.Rat, error) {
switch node := tree.(type) {
case *ast.Number:
return parseNumNode(node)
case *ast.BaseNode:
return evalNodes(tree.Children())
default:
return nil, fmt.Errorf("Unkown node type: %T", tree)
}
}
