; Single-line if-then (multiple instructions for true branch is allowed)
macro   ifdo    cond*, [true*]
{
  common
    if cond
  forward
                true
  common
    end if
} ; ifdo

; Single-line if-then[-else] (multiple instructions for false branch is allowed)
macro   ifel    cond*, true*, [false]
{
  common
    if cond
                true
    else
  forward
                false
  common
    end if
} ; ifel

x = 1
y = 1

; ok
ifdo x, \
  <ifel y, <mov ax,bx>, <mov cx,dx>>

; ok
ifel x, \
  <ifdo y, <mov ax,bx>>, \
  <mov cx,dx>

; error
ifdo x, \
  <ifdo y, <mov ax,bx>>

; error
ifel x, \
  <ifel y, <mov ax,bx>, <mov cx,dx>>