def toscheme(self, val, shallow=False):
"Convert a Python value to a Scheme value."
if callable(val):
val = self._wrap_python_callable(val, shallow)
return expressions.makePrimitiveProcedure(val)
if val is True:
return symbol.true
if val is False:
return symbol.false
if type(val) is schemepy.types.Symbol:
return symbol.Symbol(val.name)
if type(val) is schemepy.types.Cons:
car = val.car
cdr = val.cdr
if not shallow:
car = self.toscheme(car)
cdr = self.toscheme(cdr)
return pair.cons(car, cdr)
if isinstance(val, list):
lst = pair.NIL
for el in reversed(val):
if not shallow:
el = self.toscheme(el)
lst = pair.cons(el, lst)
return lst
if isinstance(val, dict):
lst = pair.NIL
for key, value in val.items():
key = self.toscheme(key)
if not shallow:
value = self.toscheme(value)
lst = pair.cons(pair.cons(key, value), lst)
return lst
return val
def make_each(ms):
def find_next_arity(this, arities):
arities = [x for x in arities if x > this]
if not arities: return MEC
return max(MEC, min(arities))
if ms is nil: return nil
meth = ms.car()
rest = make_each(ms.cdr())
names = None
if fixed_arityp(meth):
names = (meth_name(meth, meth_arity(meth)),)
else:
names = nil
base = meth_base_name(meth)
this_arity = meth_arity(meth)
next_arity = find_next_arity(this_arity, variable_arities[base])
for i in range(this_arity, next_arity):
if i not in fixed_arities.get(base, ()):
names = cons(meth_name(meth, i), names)
if this_arity == max(variable_arities[base]):
names = cons(meth_name(meth, '+'), names)
return cons((meth, names), rest)
def toscheme(self, val, shallow=False):
"Convert a Python value to a Scheme value."
if callable(val):
val = self._wrap_python_callable(val, shallow)
return expressions.makePrimitiveProcedure(val)
if val is True:
return symbol.true
if val is False:
return symbol.false
if type(val) is schemepy.types.Symbol:
return symbol.Symbol(val.name)
if type(val) is schemepy.types.Cons:
car = val.car
cdr = val.cdr
if not shallow:
car = self.toscheme(car)
cdr = self.toscheme(cdr)
return pair.cons(car, cdr)
if isinstance(val, list):
lst = pair.NIL
for el in reversed(val):
if not shallow:
el = self.toscheme(el)
lst = pair.cons(el, lst)
return lst
if isinstance(val, dict):
lst = pair.NIL
for key, value in val.items():
key = self.toscheme(key)
if not shallow:
value = self.toscheme(value)
lst = pair.cons(pair.cons(key, value), lst)
return lst
return val
def collect_elifs(seq):
if seq.nullp(): return false_s, seq
next = seq.car()
if tagged_list(next, else_s):
return cons(do_s, next.cdr()), seq.cdr()
if not tagged_list(next, elif_s): return false_s, seq
alt, tail = collect_elifs(seq.cdr())
return plist(do_s, cons(if_s, next.cdr()), plist(else_s, alt)), tail
def expand_for(exp):
param = exp.cadr()
in_word = exp.caddr()
seq_exp = exp.cadddr()
body_seq = exp.cddddr()
if in_word is not in_s:
raise CompileError(exp, 'should be "for <expr> in <expr>"')
f = cons(fn_s, cons(plist(param), body_seq))
return plist(map_s, f, seq_exp)
def set_merge(l1, l2):
if l1.nullp(): return l2
if l2.nullp(): return l1
l1a = l1.car()
l2a = l2.car()
if l1a is l2a: return cons(l1a, set_merge(l1.cdr(), l2.cdr()))
if l1a < l2a: return cons(l1a, set_merge(l1.cdr(), l2))
if l1a > l2a: return cons(l2a, set_merge(l1, l2.cdr()))
raise RuntimeError("can't happen")
def expandQuasiquotation(exp, depth=1):
"""Takes a quasiquoted expression and constructs a new quoted
expression.
FIXME: this function is SO evil. *grin* Must clean this up.
"""
if not pair.isList(exp):
return makeQuoted(exp)
if isUnquoted(exp):
if depth == 1:
return textOfUnquotation(exp)
else:
return pair.list(
Symbol("list"),
makeQuoted(Symbol("unquote")),
expandQuasiquotation(textOfUnquotation(exp), depth - 1))
if isQuasiquoted(exp):
return pair.list(
Symbol("list"),
makeQuoted(Symbol("quasiquote")),
expandQuasiquotation(textOfUnquotation(exp), depth + 1))
else:
return pair.cons(
Symbol("list"),
pair.listMap(lambda subexp:
expandQuasiquotation(subexp, depth),
exp))
def scan_out_defines(body, cenv):
def scan(body):
if body.nullp(): return nil, nil, nil
exp = body.car()
vars, exps, voids = scan(body.cdr())
if tagged_list(exp, def_s):
var = definition_variable(exp)
val = definition_value(exp)
set = plist(set__s, var, val)
return cons(var, vars), cons(set, exps), cons(q_unassigned_s, voids)
if tagged_list2(exp, assign_s):
var = exp.car()
addr, tail = find_variable(var, cenv)
if addr is not_found_s:
exp = assign2prefix(exp, def_s)
val = definition_value(exp)
set = plist(set__s, var, val)
return cons(var, vars), cons(set, exps), cons(q_unassigned_s, voids)
else:
set = assign2prefix(exp, set__s)
return vars, cons(set, exps), voids
else:
return vars, cons(exp, exps), voids
vars, exps, voids = scan(body)
if vars.nullp(): return exps
binding = make_fn(vars, exps)
return plist(cons(binding, voids)) # apply the fn to the void values
def expand_if(seq):
def help(stmt, alt):
test = stmt.cadr()
consequent = cons(do_s, stmt.cddr())
return plist(qmark_s, test, consequent, alt)
if seq.nullp(): return seq
alternative, tail = collect_elifs(seq.cdr())
return cons(help(seq.car(), alternative), tail)
def testSetCarCdr(self):
self.pe("(define x '(hello world))")
self.pe("(define y x)")
self.pe("(define z (cons 'hi 'earth))")
self.pe("(set-car! x 'hi)")
self.pe("(set-cdr! y 'earth)")
self.assertEquals(pair.cons(Symbol("hi"), Symbol("earth")),
self.pe("x"))
self.assert_(self.pe("(eq? x y)"))
self.assert_(self.pe("(not (eq? x z))"))
self.assert_(self.pe("(equal? x z)"))
def testSetCarCdr(self):
self.pe("(define x '(hello world))")
self.pe("(define y x)")
self.pe("(define z (cons 'hi 'earth))")
self.pe("(set-car! x 'hi)")
self.pe("(set-cdr! y 'earth)")
self.assertEquals(pair.cons(Symbol("hi"), Symbol("earth")),
self.pe("x"))
self.assert_(self.pe("(eq? x y)"))
self.assert_(self.pe("(not (eq? x z))"))
self.assert_(self.pe("(equal? x z)"))
def expand_import(stmt):
def old_name(term):
if symbolp(term): return term
return term.car()
def new_name(term):
if symbolp(term): return term
return term.caddr()
def import_term2def(term):
return make_def(new_name(term),
make_call(new_name(stmt.cadr()), old_name(term)))
def module2def(name):
return make_def(new_name(name), make_load_module(old_name(name)))
terms = stmt.cddr()
return cons(module2def(stmt.cadr()), terms.map(import_term2def))
def compile_meth_body(meth, meth_entry, cenv):
pop_all_symbol = make_label('pop-all')
if is_inline_meth(meth):
return compile_inline_meth_body(meth, meth_entry, cenv)
if is_asm_meth(meth): return compile_asm_meth_body(meth, meth_entry, cenv)
formals = meth_params(meth)
body = meth_body(meth)
cenv = cons(formals, cenv)
return append_ir_seqs(
make_ir_seq((proc_r,), (env_r,),
backptr(),
meth_entry,
closure_env(env_r, proc_r)),
compile_literal(formals, tmp_r, next_s, cenv, pop_all_symbol),
make_ir_seq((env_r, tmp_r, argl_r), (env_r,),
extend_environment(env_r, env_r, argl_r, tmp_r)),
compile_sequence(body, val_r, return_s, cenv, pop_all_symbol))
def scan(body):
if body.nullp(): return nil, nil, nil
exp = body.car()
vars, exps, voids = scan(body.cdr())
if tagged_list(exp, def_s):
var = definition_variable(exp)
val = definition_value(exp)
set = plist(set__s, var, val)
return cons(var, vars), cons(set, exps), cons(q_unassigned_s, voids)
if tagged_list2(exp, assign_s):
var = exp.car()
addr, tail = find_variable(var, cenv)
if addr is not_found_s:
exp = assign2prefix(exp, def_s)
val = definition_value(exp)
set = plist(set__s, var, val)
return cons(var, vars), cons(set, exps), cons(q_unassigned_s, voids)
else:
set = assign2prefix(exp, set__s)
return vars, cons(set, exps), voids
else:
return vars, cons(exp, exps), voids
def expandQuasiquotation(exp, depth=1):
"""Takes a quasiquoted expression and constructs a new quoted
expression.
FIXME: this function is SO evil. *grin* Must clean this up.
"""
if not pair.isList(exp):
return makeQuoted(exp)
if isUnquoted(exp):
if depth == 1:
return textOfUnquotation(exp)
else:
return pair.list(
Symbol("list"), makeQuoted(Symbol("unquote")),
expandQuasiquotation(textOfUnquotation(exp), depth - 1))
if isQuasiquoted(exp):
return pair.list(
Symbol("list"), makeQuoted(Symbol("quasiquote")),
expandQuasiquotation(textOfUnquotation(exp), depth + 1))
else:
return pair.cons(
Symbol("list"),
pair.listMap(lambda subexp: expandQuasiquotation(subexp, depth),
exp))
def makeAnd(clauses):
return pair.cons(symbol.Symbol("AND"), clauses)
def make_fn(parameters, body):
return cons(fn_s, cons(parameters, body))
def make_obj(tos):
return cons(obj_s, tos)
def letBindingValues(bindings):
if pair.isNull(bindings): return pair.list()
return pair.cons(pair.cadr(pair.car(bindings)),
letBindingValues(pair.cdr(bindings)))
def makeApplication(operators, operands):
return pair.cons(operators, operands)
def help(stmt, alt): test = stmt.cadr() consequent = cons(do_s, stmt.cddr()) return plist(qmark_s, test, consequent, alt)
def c_rest_eaten(restVal):
return pogo.bounce(cont, pair.cons(firstVal, restVal))
def c2(tail_val):
return pogo.bounce(cont, pair.cons(head_val, tail_val))
def makeBegin(seq):
return pair.cons(Symbol("begin"), seq)
def set_minus1(l, x): if l.nullp(): return nil a = l.car() d = set_minus1(l.cdr(), x) return d if a is x else cons(a, d)
def makeBegin(seq):
return pair.cons(Symbol("begin"), seq)
def letToApplication(exp):
bindings = letBindings(exp)
return pair.cons(makeLambda(letBindingVariables(bindings), letBody(exp)),
letBindingValues(bindings))
def export_term2to(term): if symbolp(term): return cons(plist(term), plist(term)) return cons(plist(term.caddr()), plist(term.car()))
def eval_rest_cont(tailVal):
return pogo.bounce(cont, pair.cons(headVal, tailVal))
def if_macro_alternative(seq): if seq.nullp(): return false_s next = seq.car() if tagged_list(next, else_s): return cons(do_s, next.cdr()) return false_s
def makeOr(clauses):
return pair.cons(symbol.Symbol("OR"), clauses)
def testRecursiveExpressionsDontKillUs(self):
## Makes sure that circular structures do not kill us.
loopyList = pair.cons(1, 1)
pair.setCdrBang(loopyList, loopyList)
self.assertEquals("(1 . [...])", toString(loopyList))
def exp_operands(exp):
if not message_send(exp): return exp.cdr()
if call_app(exp): return exp.cddr()
msg = plist(quote_s, extract_message(exp.cadr()))
argl = cons(S('list'), exp.cddr())
if send_app(exp): return plist(exp.car(), msg, argl)
def testDottedPairs(self):
self.assertEquals("(1 . 2)", toString(pair.cons(1, 2)))
def fn2obj(exp):
sig = cons(run_s, fn_params(exp))
body = fn_body(exp)
return make_obj(plist(cons(sig, body)))
def makeApplication(operators, operands):
return pair.cons(operators, operands)
def match_loop(self, parse, *sentinels):
if self.peek in sentinels: return nil
first = parse()
return cons(first, self.match_loop(parse, *sentinels))
def testDottedPairs(self):
self.assertEquals("(1 . 2)", toString(pair.cons(1, 2)))
def testRecursiveExpressionsDontKillUs(self):
## Makes sure that circular structures do not kill us.
loopyList = pair.cons(1, 1)
pair.setCdrBang(loopyList, loopyList)
self.assertEquals("(1 . [...])", toString(loopyList))
def c_rest_eaten(restVal):
return pogo.bounce(cont, pair.cons(firstVal, restVal))
def c2(tail_val):
return pogo.bounce(cont, pair.cons(head_val, tail_val))
