You don't need to instentiate an array because it is already instentiated. Try 
this 
    
    
    Var x :TextBuffer
    echo repr (x.glyphPositions)
    

Which should print 100 element with the default value of NVGglyphPosition, and 
that because array[100, X] is a fixed size array, wich means that it will 
always contain 100 elements even without instentiation. For dynamicaly 
allocated you have to use a 'seq'. 

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