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#include <boost/phoenix/statement/if.hpp>
The syntax is
if_(conditional_expression) [ sequenced_statements ] .else_ [ sequenced_statements ]
Take note that else
has a
leading dot and a trailing underscore: .else_
Example: This code prints out all the elements and appends " > 5"
, "
== 5"
or " < 5"
depending on the element's actual value:
std::for_each(c.begin(), c.end(), if_(arg1 > 5) [ cout << arg1 << " > 5\n" ] .else_ [ if_(arg1 == 5) [ cout << arg1 << " == 5\n" ] .else_ [ cout << arg1 << " < 5\n" ] ] );
Notice how the if_else_
statement is nested.