Unseparated arguments & colon keyword arguments

The BuildDSL allows passing arguments to function calls without separation by commas. Keyword arguments may be specified using colons (:) instead of equal signs (=).

Example 1

BuildDSLPython

print 'Hello, World!' 42 * 1 + 10 file: sys.stdout

print('Hello, World!', 42 * 1 + 10, file=sys.stdout)

Example 2

BuildDSLPython

task "hello_world" do: {
  print "Hello, World!"
}

def _closure_1(self, *arguments, **kwarguments):
    print('Hello, World!')
task('hello_world', do=_closure_1)

Example 3

BuildDSLPython

list(map { print('Hello,', self) } ['John', 'World'])

def _closure_1(self, *arguments, **kwarguments):
    print('Hello,', self)
list(map, _closure_1['John', 'World'])

Danger

Note how this actually passes all arguments to list() and it tries to index an element on the closure. The outer-most statement has the priority to receive the arguments, and subscripting takes precedence over the subscript being treated as a separate argument.

BuildDSLPython

list(map({ print('Hello,', self) }, ['John', 'World']))

def _closure_1(self, *arguments, **kwarguments):
    print('Hello,', self)

list(map(_closure_1, ['John', 'World']))