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definition module Sil.Check

from StdOverloaded import class toString

from Data.Maybe import :: Maybe

from Sil.Syntax import :: Program, :: Name

:: CheckError
	= NoMainFunction
	| DuplicateFunctionName Name
	| DuplicateLocalName Name Name
	| ReturnExpressionFromVoidError Name
	| NoReturnFromNonVoidError Name
	| LocalVoid Name Name

instance toString CheckError

checkProgram :: *(Maybe *File) Program -> *([CheckError], *Maybe *File)