forward-decls.nim

# The key thing about the scheme is that stuff gets compiled on first usage

proc foo = 
  bar()

proc bar =
  ...

foo() # foo is compiled here (bar is already in scope so it's OK)

# -------------------------------------
# You can still forcefully produce an error like this:
# Note that the same will happen in every scripting language,
# hence scripting languages are good analogy to my scheme

foo() # first usage of foo: error, what is foo?

proc foo() = ...

# -------------------------------------

proc foo(x: int) = ...

template foo() =
  proc bar = ...

foo() # foo is used here, so we need to examine all overloads at this point
      # the template will be expanded and ``bar`` is registered

bar() # Ok, bar is already in scope