c - c 中间接运算符的右值

Question

我对以下声明的工作感到困惑:

*ptr++->str

第一个 ++ 运算符应用于返回右值的 ptr。必须应用下一个运算符 ->。 -> 运算符不需要左值吗？

Answer 1

Doesnt -> operator require lvalue?

没有。请参阅 C99 标准第 6.5.2.3 节:

The first operand of the -> operator shall have type ‘‘pointer to qualified or unqualified structure’’ or ‘‘pointer to qualified or unqualified union’’, and the second operand shall name a member of the type pointed to.

...

A postfix expression followed by the -> operator and an identifier designates a member of a structure or union object. The value is that of the named member of the object to which the first expression points, and is an lvalue.

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