Java，C ++，C＃等如何解决这种特殊的句法模糊性与<和>？ [英] How do Java, C++, C#, etc. get around this particular syntactic ambiguity with < and >?
问题描述
我曾经认为C ++是一个奇怪的，与< 和> 的所有含糊不清，但在尝试实现解析器之后，我想我找到了一个打破 每个 语言的示例，该语言使用< 和> 用于泛型类型：
I used to think C++ was the "weird" one with all the ambiguities with < and >, but after trying to implement a parser I think I found an example which breaks just about every language that uses < and > for generic types:
f(g<h, i>(j));
这可能在语法上被解释为泛型方法调用（ g ），或者可以解释为给出 f 两次比较的结果。
This could be syntactically either interpreted as a generic method call (g), or it could be interpreted as giving f the results of two comparisons.
如何做这些语言（特别是Java，我认为应该是LALR（1） -parsable？）解决这种语法歧义？
How do such languages (especially Java, which I thought was supposed to be LALR(1)-parsable?) get around this syntactic ambiguity?
我无法想象任何非hacky / context-free方式来解决这个问题，而且我对这种语言如何无上下文感到困惑，更不用说LALR（1）-parsable ...
I just can't imagine any non-hacky/context-free way of dealing with this, and I'm baffled at how any such language can be context-free, let alone LALR(1)-parsable...
（值得注意的是，即使是GLR解析器也无法为此语句返回单个解析而没有上下文！ ！）
(It's worth noting that even a GLR parser can't return a single parse for this statement with no context!!)
推荐答案
java中的泛型方法调用将是< h，i> g（j）所以没有歧义：）
a generic method call in java would be <h,i>g(j) so there is no ambiguity :)
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