def happend(*args):
'''Doc * Doc * ... -> Doc
Concatenates argument (horizontaly)
'''
if not args:
return empty()
doc = args[-1]
for arg in args[-2::-1]:
doc = DocCat(arg, doc)
return doc
def happend_with(sep, *args):
'''Doc * Doc * Doc * ... -> Doc
Concatenates the argument, each one separated
by the sep document
'''
if not args:
return empty()
size = len(args)
if size == 1:
return args[0]
# at least 2 arguments
nargs = []
count = 0
for arg in args:
nargs.append(arg)
if count < size - 1:
nargs.append(sep)
count = count + 1
return happend(*nargs)
def f(n):
if n > nb_spaces:
return empty()
else:
return spaces(nb_spaces - n)
