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    <p>Member lookup rules are defined in Section 10.2/2</p> <blockquote> <p>The following steps define the result of name lookup in a class scope, <code>C</code>. First, every declaration for the name in the class and in each of its base class sub-objects is considered. A member name <code>f</code> in one sub-object <code>B</code> hides a member name <code>f</code> in a sub-object <code>A</code> if <code>A</code> is a base class sub-object of <code>B</code>. <strong>Any declarations that are so hidden are eliminated from consideration</strong>. Each of these declarations that was introduced by a using-declaration is considered to be from each sub-object of <code>C</code> that is of the type containing the declara-tion designated by the using-declaration. <strong>If the resulting set of declarations are not all from sub-objects of the same type, or the set has a nonstatic member and includes members from distinct sub-objects, there is an ambiguity and the program is ill-formed</strong>. Otherwise that set is the result of the lookup.</p> </blockquote> <pre><code>class A { public: int f(int); }; class B { public: int f(); }; class C : public A, public B {}; int main() { C c; c.f(); // ambiguous } </code></pre> <p>So you can use the <code>using</code> declarations <code>A::f</code> and <code>B::f</code> to resolve that ambiguity</p> <pre><code>class C : public A, public B { using A::f; using B::f; }; int main() { C c; c.f(); // fine } </code></pre> <p>The second code works flawlessly because <code>void foo(float)</code> is inside C's scope. Actually <code>d.foo(5);</code> calls <code>void foo(float)</code> and not the <code>int</code> version.</p>
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    1. POWhy do multiple-inherited functions with same name but different signatures not get treated as overloaded functions?
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    1. USPrasoon Saurav
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    1. COThe `void foo(float)` version being called really got me there.. thanks for your extensive answer. :)
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    2. COOne thing that comes to mind... is there a situation, where one would want to hide the base class functions if they have different signatures? For same signature functions, sure, that's useful, but for different ones I just can't imagine a good example...
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    3. CO+1. Very Nice. I didn't know this. Thanks Prasoon. :-)
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