英文:
Iterate over a []rune | string passed in generics
问题
我正在使用这个约束规则来处理泛型：
type LineParser[T []rune | string] struct {
}
我有这个结构体的泛型方法：
func (it *LineParser[T]) Parser(line T)
在这个方法内部，我想要迭代这个行，但是我得到了这个错误：
> invalid operation: cannot slice line (variable of type T constrained by []rune|string): T has no core type
有什么建议吗？
英文:
I am working with generics with this constrained rule:
type LineParser[T []rune | string] struct {
}
And I have this generic method of that struct:
func (it *LineParser[T]) Parser(line T)
Inside of that method I want to iterate the line but I am getting this error:
> invalid operation: cannot slice line (variable of type T constrained by []rune|string): T has no core type
any suggestions?
答案1
得分: 3
将line值转换为[]rune值后再进行迭代。这样，方法的每个实例都将迭代相同类型的值。
type LineParser[T []rune | string] struct {}
func (it *LineParser[T]) Parser(line T) {
for _, r := range []rune(line) {
// 对下一个rune执行某些操作
_ = r
}
}
英文:
Convert the line value to a []rune value before iterating. This way, every instance of the method will iterate over the same type.
type LineParser[T []rune | string] struct {}
func (it *LineParser[T]) Parser(line T) {
for _, r := range []rune(line) {
// do something with the next rune
_ = r
}
}
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