Clarification: how is an empty layout qualfier, or a qualifier of [1] handled when present in a series of qualifiers, or via a typedef chain?

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Consider the following:

shared shared [1] int A[THREADS];

After the first occurrence of 'shared' there is an empty layout qualifier, 
which implies a value of [1].  Is this duplicative w. r. t. to the second 
explicit layout qualifier of [1]?

How about the following:

shared shared [3] int A[3*THREADS];

does the value [3] over-ride the previous empty layout qualifier?

Is the following equivalent, or somehow different?

shared [1] shared [3] int A[3*THREADS];

This issue is related to issue #68.

Original issue reported on code.google.com by gary.funck on 17 Jul 2012 at 8:22

• Blocked on: Clarification: the re-specification of a same-valued layout qualifer is allowed #68