include fname				include named vip script
v = include fname

require "library:version"	include library script file

sys fname, args...			execute named program
v = sys(fname,args...)

exec fname, args...			asynchron with full connection via pipes
v = exec(fname,args...)

call fname, args...			call named vip script
v = call(fname,args...)

eval text					execute string
v = eval text


----------
if a user-defined proc is seen at the place of an instruction,
then use syntax for instructions:

myproc(a,b,c){..}
...
myproc a,b,c
or
myproc (a,b,c)

aber auch:

put ( a, b, c )




------------

a = eval(text)
a = string(value)
a = string(value,flag)		flag=1 -> string(text) = convert(text to quoted)

a = string(value)			tostring
a = istext (v=value) ? convert(v to quoted) : string(v)

a = number(text)			tonumber

----

a = { value }				tolist
a = islist (v=value) ? v : { v }

v = value					toproc
a = eval "proc(){return " #( istext v ? (convert v to quoted) : v )# "}"
a = isproc v ? v : eval "proc(){return " #( istext v ? (convert v to quoted) : v )# "}"

------------

comma operator:

list = ( a, b, c )
list = ( a )

list = [ a, b, c ]
list = [ a to b ]
list = [ a ]

list = { a, b, c }
list = { }