26 lines
712 B
C++
26 lines
712 B
C++
//
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// Created by light on 20-1-6.
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//
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#include <iostream>
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bool f();
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auto test = f(); // Famous usage, auto deduced that test is a boolean, hurray!
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// vvv t wasn't declare at that point, it will be after as a parameter!
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template<typename T>
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decltype(t.serialize()) g(const T &t) {} // Compilation error
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// Less famous usage:
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// vvv auto delayed the return type specification!
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// vvv vvv the return type is specified here and use t!
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template<typename T>
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auto g(const T &t) -> decltype(t.serialize()) {} // No compilation error.
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auto myFunction() // Automagically figures out that myFunction returns ints.
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{
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return int();
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} |