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[REBOL] [context] Problem with context?

From: apwing::zonnet::nl at: 4-Apr-2005 12:04

Hi rebolers, being busy with some dialecting I bumped into a kind of context (variable scope) problem. Here follows a small example: ============================================================================================================================================== REBOL [] dc: make object! [ rule: [set num1 number! '+ set num2 number! (print num1 + num2 res: insert tail res (num1 + num2))] calc: func [ input [block!] /local res num1 num2 ][ res: copy [] if not parse input rule [ res: "Bad input!" ] print head res ] ] dc/calc [5 + 2] halt ============================================================================================================================================== When executing dc/calc [5 + 2] it says: 7 ** Script Error: res has no value ** Where: calc ** Near: res: insert tail res (num1 + num2) Which means that variables num1 and num2 are having a value, added and printed (7), but res has no value. However res is defined in dc/calc and is being initialized properly right before executing the parse. When I define res at the same level as I did rule and not within clc, everything works fine. Any hints to improve my understanding? TIA Kind regards, Arie