☜	MERGE 1995 Version of ANSI (Equivalent to Current ISO Version) of Standard					☞

8.2.13 Merge

M[ERGE] postcond SP L mergeargument

Merge provides a facility to copy a glvn₂ into a glvn₁ and all descendants of glvn₂ into descendants of glvn₁ according to the scheme described below.

Merge does not Kill any nodes in glvn₁, or any of its descendants.

Assume that glvn₁ is represented as A(i₁, i₂, ..., i_x) (x'<0) and that glvn₂ is represented as B(j₁, j₂, ..., j_y) (y'<0).

Then:

1. If $Data(B(j₁,j₂,...,j_y)) has a value of 1 or 11, then the value of glvn₂ is given to glvn₁.
2. The value for every occurrence of z, such that z > 0 and $Data(B(j₁, j₂,...,j_y+z)) has a value of 1 or 11, the value of B(j₁,j₂,...,j_y+z) is given to A(i₁, i₂,...,i_x,j_y+1,j_y+2,...,j_y+z).

The state of the naked indicator will be modified as if $Data(glvn₂)#10=1 and the command Set glvn₁=glvn₂ would have been executed.

If glvn₁ is a descendant of glvn₂ or if glvn₂ is a descendant of glvn₁ an error condition occurs with ecode="M19".

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