35 lines
1.7 KiB
Markdown
35 lines
1.7 KiB
Markdown
[over.call]
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# 12 Overloading [[over]](./#over)
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## 12.4 Overloaded operators [[over.oper]](over.oper#over.call)
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### 12.4.4 Function call [over.call]
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/overloading.tex#L3622)
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A [*function call operator function*](#def:operator_function,function_call "12.4.4 Function call [over.call]") is a function named operator() that is a member function with an arbitrary number of parameters[.](#1.sentence-1)
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It may have default arguments[.](#1.sentence-2)
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For an expression of the form
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[*postfix-expression*](expr.post.general#nt:postfix-expression "7.6.1.1 General [expr.post.general]") ( [*expression-list*](expr.post.general#nt:expression-list "7.6.1.1 General [expr.post.general]")opt )
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where the [*postfix-expression*](expr.post.general#nt:postfix-expression "7.6.1.1 General [expr.post.general]") is of class type,
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the operator function
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is selected by overload resolution ([[over.call.object]](over.call.object "12.2.2.2.3 Call to object of class type"))[.](#1.sentence-3)
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If a surrogate call function is selected,
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let e be the result of invoking the corresponding conversion operator function on the [*postfix-expression*](expr.post.general#nt:postfix-expression "7.6.1.1 General [expr.post.general]");
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the expression is interpreted as
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e ( [*expression-list*](expr.post.general#nt:expression-list "7.6.1.1 General [expr.post.general]")opt )
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Otherwise, the expression is interpreted as
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[*postfix-expression*](expr.post.general#nt:postfix-expression "7.6.1.1 General [expr.post.general]") . operator () ( [*expression-list*](expr.post.general#nt:expression-list "7.6.1.1 General [expr.post.general]")opt )
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