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Update C++ docs to improve clarity on namespace.

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Make it immediately obvious what importing a namespace does, instead of just listing how to use fully qualified symbols.
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bharathcs 2022-08-29 13:13:34 +08:00 committed by GitHub
parent e6f2e1420c
commit 5faaf058e1
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1 changed files with 8 additions and 2 deletions
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@ -158,6 +158,10 @@ namespace Second {
{ {
printf("This is Second::foo\n"); printf("This is Second::foo\n");
} }
void bar()
{
printf("This is Second::bar\n");
}
} }
void foo() void foo()
@ -168,10 +172,12 @@ void foo()
int main() int main()
{ {
// Includes all symbols from namespace Second into the current scope. Note // Includes all symbols from namespace Second into the current scope. Note
// that simply foo() no longer works, since it is now ambiguous whether // that while bar() works, simply using foo() no longer works, since it is
// we're calling the foo in namespace Second or the top level. // now ambiguous whether we're calling the foo in namespace Second or the
// top level.
using namespace Second; using namespace Second;
bar(); // prints "This is Second::bar"
Second::foo(); // prints "This is Second::foo" Second::foo(); // prints "This is Second::foo"
First::Nested::foo(); // prints "This is First::Nested::foo" First::Nested::foo(); // prints "This is First::Nested::foo"
::foo(); // prints "This is global foo" ::foo(); // prints "This is global foo"