[Oberon] Text buffer analogue of Strings.Prefix.

[peter at easthope.ca]

Hello again,

PC Native O. has 
 (** Is str prefixed by pre? *)
	PROCEDURE Prefix*(CONST pre, str(** in *): ARRAY OF CHAR): BOOLEAN;

Does an analogue for Text buffers exist?  

Here is the context.  Open a reader on a Text and read. 
A segment of the Text is copied to a buffer.  Later another 
segment to another buffer.  Then ask whether the 2nd is a prefix of the first.

An alternative is to create two character arrays and use Strings.Prefix 
but the buffer idea might be better.

Incidental question: what is the significance of CONST in the declaration?
PROCEDURE Prefix*(pre, str(** in *): ARRAY OF CHAR): BOOLEAN; ?

Thanks,                        ... Lyall E.



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