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Editorial Team
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Asked: 2026-06-12T09:26:52+00:00

Why does the following function not end? (* funct1 is a different function that

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Why does the following function not end?

(* funct1 is a different function that does end *)
fun funct(a,b::bs)=let val c=a in funct1(c,a,b::bs); 
= ;
= ;
= ;
= ;
stdIn:15.54-17.2 Error: syntax error: deleting  SEMICOLON SEMICOLON SEMICOLON
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1 Answer

  1. Editorial Team

    The error message is really instructive in this case. The function does not end because you need end keyword instead of ;. This is the syntax for let...in...end block in SML.

    fun funct (a, b::bs) = let val c = a in funct1 (c, a, b::bs) end
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