2G. lists ([1,2,3]) and typed lists
-----------------------------------
An immediate list is the constant counterpart of the LIST datatype,
just as a 'string' is the constant counterpart for the STRING or
ARRAY OF CHAR datatype. Example:

[3,2,1,4]

is an expression that has as value a PTR to an already initialised list,
a list as a representation in memory is compatible with an ARRAY OF LONG,
with some extra length information at a negative offset. You may use these
immediate lists anywhere a function expects a PTR to an array of
32bits values, or a list. Examples:

['string',1.0,2.1]
[WA_FLAGS,1,WA_IDCMP,$200,WA_WIDTH,120,WA_HEIGHT,150,TAG_DONE]

(see  9C  on list-functions for a discussion on typed-immediate
lists and detailed information).