function f0() print( "f0:" ) end
function f1(a) print( "f1:", a ) end
function f2(a,b) print( "f2:", a, b ) end
function f3(a,b,c) print( "f3:", a, b, c ) end
function f4(a,b,c,d) print( "f4:", a, b, c, d ) end

f0()  f0( "a1/1" ) f0( "a1/2", "a2/2" ) f0( "a1/3", "a2/3", "a3/3" ) f0( "a1/4", "a2/4", "a3/4", "a4/4" )
f1()  f1( "a1/1" ) f1( "a1/2", "a2/2" ) f1( "a1/3", "a2/3", "a3/3" ) f1( "a1/4", "a2/4", "a3/4", "a4/4" )
f2()  f2( "a1/1" ) f2( "a1/2", "a2/2" ) f2( "a1/3", "a2/3", "a3/3" ) f2( "a1/4", "a2/4", "a3/4", "a4/4" )
f3()  f3( "a1/1" ) f3( "a1/2", "a2/2" ) f3( "a1/3", "a2/3", "a3/3" ) f3( "a1/4", "a2/4", "a3/4", "a4/4" )
f4()  f4( "a1/1" ) f4( "a1/2", "a2/2" ) f4( "a1/3", "a2/3", "a3/3" ) f4( "a1/4", "a2/4", "a3/4", "a4/4" )

function g0(a,b,c,d) return end
function g1(a,b,c,d) return d end
function g2(a,b,c,d) return c, d end
function g3(a,b,c,d) return b, c, d end
function g4(a,b,c,d) return a, b, c, d end

z = g0("c0.1/4", "c0.2/4", "c0.3/4", "c0.4/4")
print( "z0:", z )
z = g2("c2.1/4", "c2.2/4", "c2.3/4", "c2.4/4")
print( "z2:", z )
z = g4("c4.1/4", "c4.2/4", "c4.3/4", "c4.4/4")
print( "z4:", z )

a,b,c,d = g0( "c0.1/4", "c0.2/4", "c0.3/4", "c0.4/4" )
print( "g0:", a, b, c, d, "(eol)" )
a,b,c,d = g2( "b2.1/4", "b2.2/4", "b2.3/4", "b2.4/4" )
print( "g2:", a, b, c, d, "(eol)" )
a,b,c,d = g4( "b4.1/4", "b4.2/4", "b4.3/4", "b4.4/4" )
print( "g4:", a, b, c, d, "(eol)" )

function func(a,b,c)
	return a, b, c
end

print( func(11, 12, 13) )
print( func(23, 22, 21) )
print( func(func(32,33,34), func(45,46,47), func(58,59,50)) )

function p(a,...)
	print("a",a)
	print("...",...)
	print("...,a",...,a)
	print("a,...",a,...)
end
p()
p("q")
p("q","r")
p("q","r","s")

-- tail call tests
function first(...) 
	return 'abc', ..., '|', ...
end

function second(a,...) 
	return 'def', ..., '|', a, ...
end

function third( a, b, c )
    print( 'third', first( a, b, c ) )
    print( 'third', second( a, b, c ) )
    return second( a, b, c )
end

print( 'third', third() )
print( 'third', third('p') )
print( 'third', third('p','q') )
print( 'third', third('p','q','r') )
print( 'third', third('p','q','r','s') )
print( 'third', third() )