Unless I am missing some core language feature, it seems to me that the 
most awkward part of the language is constructing an expression that 
represents a record with a single field modified:

let set_field3 rec value =
   match rec with
       {field1=field1; field2=field2; field3=field3; field4=field4; 
field5=field5} ->
          {field1=field1; field2=field2; field3=value; field4=field4; 
field5=field5}

is there any prettier way of doing this?


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