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< title > Lvalue Iterator Concept</ title >
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< h1 class = "title" > Lvalue Iterator Concept</ h1 >
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< p > The < em > Lvalue Iterator</ em > concept adds the requirement that the return
type of < tt class = "literal" >< span class = "pre" > operator*</ span ></ tt > type be a reference to the value type of the
iterator.</ p >
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< tr >< th colspan = "3" > Lvalue Iterator Requirements</ th >
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< tr >< th > Expression</ th >
< th > Return Type</ th >
< th > Note/Assertion</ th >
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< tr >< td >< tt class = "literal" >< span class = "pre" > *a</ span ></ tt ></ td >
< td >< tt class = "literal" >< span class = "pre" > T& </ span ></ tt ></ td >
< td >< tt class = "literal" >< span class = "pre" > T</ span ></ tt > is < em > cv</ em >
< tt class = "literal" >< span class = "pre" > iterator_traits< X> ::value_type</ span ></ tt >
where < em > cv</ em > is an optional
cv-qualification.
pre: < tt class = "literal" >< span class = "pre" > a</ span ></ tt > is
dereferenceable. If < tt class = "literal" >< span class = "pre" > a</ span >
< span class = "pre" > ==</ span > < span class = "pre" > b</ span ></ tt > then < tt class = "literal" >< span class = "pre" > *a</ span ></ tt > is
equivalent to < tt class = "literal" >< span class = "pre" > *b</ span ></ tt > .</ td >
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