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[REBOL] Words, Bindings and Contexts. (3)

From: lmecir:geocities at: 23-Jul-2000 23:24

Allow me to present a cleaned Same-context? function. Sorry for any inconvenience due to reading the former - more complicated implementation. ; this function can help us explore the Contexts, that aren't directly available same-context?: func [ {find out, if the given Words are the Words of the same Context} word1 [word!] word2 [word!] ] [ either global? word1 [ global? word2 ] [ same? word1 bind global word1 word2 ] ] Context hierarchy. Pardon? ******************************** Example: f: func [f-arg] [ prin "F-arg: " print f-arg g: func [g-arg] [ prin "G-arg: " print g-arg ] g "This is g's argument." ] f "This is f's argument" If there were any context hierarchy, then the F's Context should have been a part of G's Context, which means, that F-arg should have been in G's Context together with G-arg. Let's see: word1: probe fourth second :f word2: probe fourth second get pick second :f 9 same-context? word1 word2 == false Context hierarchy ? Aye, aye, sir! **************************************** f: func [x] [ g "this is g's argument." print x ] g: func [y] [ x: y ] word1: second second :g bind second :g fourth second :f bind second :g word1
>> f "this is f's argument"
this is g's argument. Does this prove any "Context Hierarchy?" (the answer left to the reader) to be continued...