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@@ -1,3 +1,7 @@
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layout: default
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# <a name="main"></a>C++ Core Guidelines
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November 27, 2017
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@@ -5142,7 +5146,7 @@ A class with members that all have default constructors implicitly gets a defaul
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vector<int> v;
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};
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X x; // means X{{}, {}}; that is the empty string and the empty vector
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X x; // means X{{ "{{" }}}, {}}; that is the empty string and the empty vector
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Beware that built-in types are not properly default constructed:
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@@ -7586,7 +7590,7 @@ Subscripting the resulting base pointer will lead to invalid object access and p
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void use(B*);
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D a[] = {{1, 2}, {3, 4}, {5, 6}};
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D a[] = {{ "{{" }}1, 2}, {3, 4}, {5, 6}};
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B* p = a; // bad: a decays to &a[0] which is converted to a B*
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p[1].x = 7; // overwrite D[0].y
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@@ -11645,7 +11649,7 @@ In the rare cases where the slicing was deliberate the code can be surprising.
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class Shape { /* ... */ };
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class Circle : public Shape { /* ... */ Point c; int r; };
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Circle c {{0, 0}, 42};
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Circle c {{ "{{" }}0, 0}, 42};
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Shape s {c}; // copy Shape part of Circle
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The result will be meaningless because the center and radius will not be copied from `c` into `s`.
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@@ -14623,7 +14627,7 @@ To make error handling systematic, robust, and non-repetitive.
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void use()
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{
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Foo bar {{Thing{1}, Thing{2}, Thing{monkey}}, {"my_file", "r"}, "Here we go!"};
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Foo bar {{ "{{" }}Thing{1}, Thing{2}, Thing{monkey}}, {"my_file", "r"}, "Here we go!"};
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// ...
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}
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