Module: Kl::Compiler

Defined in:
lib/kl/compiler.rb

Constant Summary collapse

PRIMITIVE_ARITIES =

The K Lambda primitives are all Ruby functions and never use trampolines. They are all regarded as System Functions and therefore are not allowed to be redefined by the user at run time. Therefore, if all of their arguments have been supplied, it is safe to directly invoke them rather than going incurring the overhead of using __apply. This table holds the arities of the primitives and is used to determine whether direct invocation is possible. Kl::Primitives::Extensions is purposely omitted from this list so that it may be overridden by Shen.

{}

Class Method Summary collapse

Class Method Details

.compile(form, lexical_vars, in_tail_pos) ⇒ Object 



26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
 
# File 'lib/kl/compiler.rb', line 26

def compile(form, lexical_vars, in_tail_pos)
  case form
  when Symbol
    if lexical_vars.has_key?(form)
      lexical_vars[form]
    else
      escape_symbol(form)
    end
  when String
    # Emit non-interpolating strings
    "'" + escape_string(form) + "'"
  when Kl::Cons
    compile_form(form, lexical_vars, in_tail_pos)
  when Kl::EmptyList
    "::Kl::EmptyList.instance"
  when Numeric
    form.to_s
  when true
    'true'
  when false
    'false'
  else
    raise Kl::InternalError, "unexpected form: #{form}"
  end
end