[over.sub] (original) (raw)

12 Overloading [over]

12.6 Overloaded operators [over.oper]

12.6.4 Subscripting [over.sub]

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A subscripting operator functionis a function named operator[]that is a non-static member function with exactly one parameter.

For an expression of the form

postfix-expression [ expr-or-braced-init-list ]

the operator function is selected by overload resolution ([over.match.oper]).

If a member function is selected, the expression is interpreted as

postfix-expression . operator [] ( expr-or-braced-init-list )

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[ Example

:

struct X { Z operator; }; X x; x[{1,2,3}] = 7; // OK: meaning x.operator int a[10]; a[{1,2,3}] = 7; // error: built-in subscript operator

— end example

]