如何进行 Gtk TextIter 算术
我正在尝试使用 Gtk TextIter 对象从 TextBuffer 中提取三个字符的切片，但在算术上遇到了问题。我设置了一个迭代器 p 来指向范围的开头，并希望 q 指向后面的三个字符。
我已经尝试过了...
q = p + 3; // Doesn't compile
q = p; q += 3; // Doesn't compile
q = p; q++; q++; q++; // Happy
我想知道正确的方法是什么。第三种方法可行，但看起来像是一种可怕的黑客行为。
有什么想法吗？
I am attempting to use Gtk TextIter objects to lift three-character slices out of a TextBuffer, but am having trouble with the arithmetic. I set up an iterator p to point to the start of the range and want q to point to three characters further on.
I have tried...
q = p + 3; // Doesn't compile
q = p; q += 3; // Doesn't compile
q = p; q++; q++; q++; // Happy
I'd like to know what the correct way to do this is. The third method works, but looks like a ghastly hack.
Any thoughts?
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如果您阅读文档，您会看到
TextIter没有+或+=运算符。它是一个双向迭代器，而不是随机访问迭代器，所以这是应该的。您可以使用：
或
If you read the documentation you'll see that
TextIterdoesn't have a+or+=operator. It's a bidirectional iterator and not a random access iterator so this is as it should be.You can use either:
or
这很奇怪。
底层 C API 具有
gtk_text_iter_forward_chars()应该做正确的事情。也许阅读源代码，和/或在 C++ 包装器上提交错误？That's weird.
The underlying C API has
gtk_text_iter_forward_chars()which should do the right thing. Maybe read the source, and/or file a bug on the C++ wrapper?