tmp/tmprg4hjo2p/{from.md → to.md}
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### [[temp]]: templates <a id="diff.cpp14.temp">[[diff.cpp14.temp]]</a>
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**Change:** Allowance to deduce from the type of a
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argument. **Rationale:** In combination with the ability to declare
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-
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specializations to decompose from the type deduced for the
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template argument. **Effect on original feature:** Valid C++14 code may
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fail to compile or produce different results in this revision of C++.
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-
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``` cpp
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template <int N> struct A;
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template <typename T, T N> int foo(A<N> *) = delete;
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void foo(void *);
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void bar(A<0> *p) {
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foo(p); // ill-formed; previously well-formed
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}
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```
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### [[temp]]: templates <a id="diff.cpp14.temp">[[diff.cpp14.temp]]</a>
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**Change:** Allowance to deduce from the type of a constant template
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argument. **Rationale:** In combination with the ability to declare
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constant template arguments with placeholder types, allows partial
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specializations to decompose from the type deduced for the constant
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template argument. **Effect on original feature:** Valid C++14 code may
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fail to compile or produce different results in this revision of C++.
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+
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[*Example 1*:
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``` cpp
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template <int N> struct A;
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template <typename T, T N> int foo(A<N> *) = delete;
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void foo(void *);
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void bar(A<0> *p) {
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foo(p); // ill-formed; previously well-formed
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}
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```
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— *end example*]
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