Re: compilation error

Friedrich Dominicus wrote:
> Roman Töngi <roman.toengi@[EMAIL PROTECTED]
> writes:
> 
>> I want to traverse a binary search tree and output
>> each node-item.
>> The following does not compile but I have no idea why not.
>> The actual argument "v" has type INTEGER_32.
>> See error message below.
>>
>> class
>> 	APPLICATION
>> create
>> 	make
>> feature -- Initialization
>> 	make is
>> 			-- Run application.
>> 		local
>> 			tree: MY_TREE [INTEGER]
>> 		do
>> 			create tree.make (500)
>> 			tree.put (200)
>> 			tree.put (100)
>> 			tree.put (150)
>> 			tree.put (125)
>> 			tree.put (600)
>> 			tree.put (550)
>> 			tree.put (800)
>> 			tree.put (700)
>> 			tree.put (650)
>> 			tree.put (750)
>> 			tree.put (725)
>> 			tree.i_infix
>> 		end
>> end -- class APPLICATION
>>
>>
>> class
>> 	MY_TREE [G -> COMPARABLE]
>> inherit
>> 	BINARY_SEARCH_TREE [G]
>> 		redefine
>> 			node_action
>> 		end
>> create
>> 	make
>> feature -- Cursor movement
>> 	node_action (v: like item) is
> this means like G
>> 			-- Perfom action on item.
>> 		do
>> 			io.put_integer (v)
> a G may or may not conform to an integer
>> 			io.put_character (' ')
>> 		end
>> invariant
>> 	invariant_clause: True -- Your invariant here
>> end -- class MY_TREE
> The error message is correct
> 
> Regards
> Friedrich
> 

Do you have a solution to my problem?
I am a beginner and thankful to any help.

Thx