[Main]
Name=is_valid_smap_aggregate
Type=Function
Subtype=ROM Call
Header Files=estack.h
Definition=short is_valid_smap_aggregate (CESI ptr);
Attributes=__attribute__((__pure__))
MinAMS=1.01

[ROM Call]
Index=$3B9

[Description]
Checks whether an expression is a valid aggregate type.

[Explanation]
is_valid_smap_aggregate returns <A HREF="$$LINK(alloc.h/Bool)">TRUE</A> if the expression pointed to by
<I>ptr</I> is a valid aggregate type (i.e. list or valid matrix), otherwise it returns
<A HREF="$$LINK(alloc.h/Bool)">FALSE</A>. This is not a simple check whether a tag pointed to by
<I>ptr</I> is <A HREF="$$LINK(Tags)">LIST_TAG</A>. For example, list which consists of
lists which are not equally sized (like {{1,2,3},{4,5}}) are not valid. Also, matrices
whose elements are list or matrices are also not valid aggregate types.

[References]
Out=next_expression_index, estack.h/remaining_element_count
In=push_parse_text, unknown.h/EQU_getNameInfo, unknown.h/push_parse_prgm_or_func_text
