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75 lines
1.3 KiB
75 lines
1.3 KiB
/*
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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namespace function {
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struct X1 {
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int getVal() { return 1; }
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};
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struct X2 {
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int getVal() { return 0; }
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};
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struct X3 {
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int get() { return 0; }
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};
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template <class T>
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int getVal(T& x) {
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return x.getVal();
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}
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// explicit specialization
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template <>
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int getVal(X3& x) {
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return x.get();
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}
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template <class T>
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int createAndGetVal() {
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T x;
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return getVal(x);
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}
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template <class T>
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int createAndDiv() {
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return 1 / createAndGetVal<T>();
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}
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// explicit instantiaion - will report div by 0
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template int createAndDiv<X3>();
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// explicit instantiation - won't report div by 0
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template int createAndDiv<X1>();
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// no instantiation for X2 - won't report div by 0
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// if line below is not commented, infer would report
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// division by 0
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// template int createAndDiv<X2>();
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int div0_get_val() {
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X1 x1;
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X3 x3;
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return getVal(x1) / getVal(x3);
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}
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int div1_get_val() {
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X1 x1;
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X3 x3;
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return getVal(x3) / getVal(x1);
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}
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int div0_create_and_get_val() {
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return createAndGetVal<X1>() / createAndGetVal<X3>();
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}
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int div1_create_and_get_val() {
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return createAndGetVal<X3>() / createAndGetVal<X1>();
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}
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} // namespace function
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