{ 0 word drop 0 'nop } :: //
{ char " word 1 { swap { abort } if drop } } ::_ abort"
{ { bl word dup "" $= abort"comment extends after end of file" "*/" $= } until 0 'nop } :: /*
// { bl word 1 2 ' (create) } "::" 1 (create)
// { bl word 0 2 ' (create) } :: :
// { bl word 2 2 ' (create) } :: :_
// { bl word 3 2 ' (create) } :: ::_
// { bl word 0 (create) } : create
// { bl word (forget) } : forget
{ bl word 1 ' (forget) } :: [forget]
{ char " word 1 ' type } ::_ ."
{ char } word x>B 1 'nop } ::_ B{
{ swap ({) over 2+ -roll swap (compile) (}) } : does
{ 1 'nop does create } : constant
{ 2 'nop does create } : 2constant
{ hole constant } : variable
10 constant ten
{ bl word 1 { find 0= abort"word not found" } } :: (')
{ bl word find not abort"-?" 0 swap } :: [compile]
{ bl word 1 { 
  dup find { " -?" $+ abort } ifnot nip execute
} } :: @'
{ bl word 1 { swap 1 'nop does swap 0 (create) }
} :: =:
{ bl word 1 { -rot 2 'nop does swap 0 (create) }
} :: 2=:
{ <b swap s, b> } : s>c
{ s>c hash } : shash
// to be more efficiently re-implemented in C++ in the future
{ dup 0< ' negate if } : abs
{ 2dup > ' swap if } : minmax
{ minmax drop } : min
{ minmax nip } : max
"" constant <#
' $reverse : #>
{ swap 10 /mod char 0 + rot swap hold } : #
{ { # over 0<= } until } : #s
{ 0< { char - hold } if } : sign
// { dup abs <# #s rot sign #> nip } : (.)
// { (.) type } : ._
// { ._ space } : .
{ bl (-trailing) } : -trailing
{ char 0 (-trailing) } : -trailing0
{ char " word 1 ' $+ } ::_ +"
{ find 0<> dup ' nip if } : (def?)
{ bl word 1 ' (def?) } :: def?
{ bl word 1 { (def?) not } } :: undef?
{ def? ' skip-to-eof if } : skip-ifdef
{ bl word dup (def?) { drop skip-to-eof } { 'nop swap 0 (create) } cond } : library
{ bl word dup (def?) { 2drop skip-to-eof } { swap 1 'nop does swap 0 (create) } cond } : library-version
{ char ) word "$" swap $+ 1 { find 0= abort"undefined parameter" execute } } ::_ $(
// b s -- ?
{ sbitrefs rot brembitrefs rot >= -rot <= and } : s-fits?
{ 0 swap ! } : 0!
{ tuck @ + swap ! } : +!
{ tuck @ swap - swap ! } : -!
{ 1 swap +! } : 1+!
{ -1 swap +! } : 1-!
{ null swap ! } : null!
0 tuple constant nil
{ 1 tuple } : single
{ 2 tuple } : pair
{ 3 tuple } : triple
{ 1 untuple } : unsingle
{ 2 untuple } : unpair
{ 3 untuple } : untriple
{ over tuple? { swap count = } { 2drop false } cond } : tuple-len?
{ 0 tuple-len? } : nil?
{ 1 tuple-len? } : single?
{ 2 tuple-len? } : pair?
{ 3 tuple-len? } : triple?
{ 0 [] } : first
{ 1 [] } : second
{ 2 [] } : third
' pair : cons
' unpair : uncons
{ 0 [] } : car
{ 1 [] } : cdr
{ cdr car } : cadr
{ cdr cdr } : cddr
{ cdr cdr car } : caddr
{ null ' cons rot times } : list
{ true (atom) drop } : atom
{ bl word atom 1 'nop } ::_ `