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Support: hoist `extern template` declarations 

Precede the `extern template` declaration prior to use.  This is helpful
as it prevents the compiler from having to worry about instantiating the
template as it will be provided for.  This is particularly important for
Windows where `__declspec(dllexport)` will traverses inheritance clauses
resulting in an incorrect application of dll interface to declarations.
This commit is contained in:
Saleem Abdulrasool 2021-09-08 09:20:43 -07:00
parent ac4896e2f3
commit c189ec2e3f
1 changed files with 36 additions and 24 deletions
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60
llvm/include/llvm/Support/CommandLine.h
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@ -926,6 +926,9 @@ public:
//--------------------------------------------------
// parser<bool>
//
extern template class basic_parser<bool>;
template <> class parser<bool> : public basic_parser<bool> {
public:
parser(Option &O) : basic_parser(O) {}
@ -949,10 +952,11 @@ public:
void anchor() override;
};
extern template class basic_parser<bool>;
//--------------------------------------------------
// parser<boolOrDefault>
extern template class basic_parser<boolOrDefault>;
template <> class parser<boolOrDefault> : public basic_parser<boolOrDefault> {
public:
parser(Option &O) : basic_parser(O) {}
@ -974,11 +978,12 @@ public:
void anchor() override;
};
extern template class basic_parser<boolOrDefault>;
//--------------------------------------------------
// parser<int>
//
extern template class basic_parser<int>;
template <> class parser<int> : public basic_parser<int> {
public:
parser(Option &O) : basic_parser(O) {}
@ -996,11 +1001,12 @@ public:
void anchor() override;
};
extern template class basic_parser<int>;
//--------------------------------------------------
// parser<long>
//
extern template class basic_parser<long>;
template <> class parser<long> final : public basic_parser<long> {
public:
parser(Option &O) : basic_parser(O) {}
@ -1018,11 +1024,12 @@ public:
void anchor() override;
};
extern template class basic_parser<long>;
//--------------------------------------------------
// parser<long long>
//
extern template class basic_parser<long long>;
template <> class parser<long long> : public basic_parser<long long> {
public:
parser(Option &O) : basic_parser(O) {}
@ -1040,11 +1047,12 @@ public:
void anchor() override;
};
extern template class basic_parser<long long>;
//--------------------------------------------------
// parser<unsigned>
//
extern template class basic_parser<unsigned>;
template <> class parser<unsigned> : public basic_parser<unsigned> {
public:
parser(Option &O) : basic_parser(O) {}
@ -1062,11 +1070,12 @@ public:
void anchor() override;
};
extern template class basic_parser<unsigned>;
//--------------------------------------------------
// parser<unsigned long>
//
extern template class basic_parser<unsigned long>;
template <>
class parser<unsigned long> final : public basic_parser<unsigned long> {
public:
@ -1085,11 +1094,12 @@ public:
void anchor() override;
};
extern template class basic_parser<unsigned long>;
//--------------------------------------------------
// parser<unsigned long long>
//
extern template class basic_parser<unsigned long long>;
template <>
class parser<unsigned long long> : public basic_parser<unsigned long long> {
public:
@ -1109,11 +1119,12 @@ public:
void anchor() override;
};
extern template class basic_parser<unsigned long long>;
//--------------------------------------------------
// parser<double>
//
extern template class basic_parser<double>;
template <> class parser<double> : public basic_parser<double> {
public:
parser(Option &O) : basic_parser(O) {}
@ -1131,11 +1142,12 @@ public:
void anchor() override;
};
extern template class basic_parser<double>;
//--------------------------------------------------
// parser<float>
//
extern template class basic_parser<float>;
template <> class parser<float> : public basic_parser<float> {
public:
parser(Option &O) : basic_parser(O) {}
@ -1153,11 +1165,12 @@ public:
void anchor() override;
};
extern template class basic_parser<float>;
//--------------------------------------------------
// parser<std::string>
//
extern template class basic_parser<std::string>;
template <> class parser<std::string> : public basic_parser<std::string> {
public:
parser(Option &O) : basic_parser(O) {}
@ -1178,11 +1191,12 @@ public:
void anchor() override;
};
extern template class basic_parser<std::string>;
//--------------------------------------------------
// parser<char>
//
extern template class basic_parser<char>;
template <> class parser<char> : public basic_parser<char> {
public:
parser(Option &O) : basic_parser(O) {}
@ -1203,8 +1217,6 @@ public:
void anchor() override;
};
extern template class basic_parser<char>;
//--------------------------------------------------
// PrintOptionDiff
//