def execute_evaluated(self, operands: List[Expression], frame: Frame):
verify_exact_callable_length(self, 2, len(operands))
for operand in operands:
if (not isinstance(operand, Number)):
raise OperandDeduceError(
''.join(['Expected operand to be Number, not ', '{}'.format(operand)]))
log.logger.get_canvas().move(operands[0].value, (- operands[1].value))
return Undefined
def pair_to_list(pos: Pair) -> List[Expression]:
out = []
while pos is not Nil:
if not isinstance(pos, Pair):
raise OperandDeduceError(f"List terminated with '{pos}', not nil")
out.append(pos.first)
pos = pos.rest
return out
def execute_simple(self, operand: Expression) -> Expression:
if isinstance(operand, Pair):
return operand.rest
else:
raise OperandDeduceError(''.join([
'Unable to extract second element, as ', '{}'.format(operand),
' is not a Pair.'
]))
def execute_evaluated(self, operands: List[Expression], frame: Frame):
verify_exact_callable_length(self, 2, len(operands))
for operand in operands:
if not isinstance(operand, Number):
raise OperandDeduceError(
f"Expected operand to be Number, not {operand}")
log.logger.get_canvas().move(operands[0].value, -operands[1].value)
return Undefined
def pair_to_list(pos: Pair) -> List[Expression]:
out = []
while (pos is not Nil):
if (not isinstance(pos, Pair)):
raise OperandDeduceError(
''.join(["List terminated with '", '{}'.format(pos), "', not nil"]))
out.append(pos.first)
pos = pos.rest
return out
def execute_evaluated(self, operands: List[Expression], frame: Frame) -> Expression:
verify_exact_callable_length(self, 3, len(operands))
(x, y, c) = operands
for v in (x, y):
if (not isinstance(v, Number)):
raise OperandDeduceError(
''.join(['Expected operand to be Number, not ', '{}'.format(v)]))
log.logger.get_canvas().pixel(x.value, y.value, make_color(c))
return Undefined
def execute(self, operands: List[Expression], frame: Frame,
gui_holder: Holder):
verify_min_callable_length(self, 2, len(operands))
bindings = operands[0]
if ((not isinstance(bindings, Pair)) and (bindings is not Nil)):
raise OperandDeduceError(''.join([
'Expected first argument of let to be a Pair, not ',
'{}'.format(bindings), '.'
]))
new_frame = Frame('anonymous let', frame)
gui_holder.expression.children[1].link_visual(
VisualExpression(bindings))
bindings_holder = gui_holder.expression.children[1]
bindings = pair_to_list(bindings)
for (i, binding) in enumerate(bindings):
if (not isinstance(binding, Pair)):
raise OperandDeduceError(''.join([
'Expected binding to be a Pair, not ',
'{}'.format(binding), '.'
]))
binding_holder = bindings_holder.expression.children[i]
binding_holder.link_visual(VisualExpression(binding))
binding = pair_to_list(binding)
if (len(binding) != 2):
raise OperandDeduceError(''.join([
'Expected binding to be of length 2, not ',
'{}'.format(len(binding)), '.'
]))
(name, expr) = binding
if (not isinstance(name, Symbol)):
raise OperandDeduceError(''.join([
'Expected first element of binding to be a Symbol, not ',
'{}'.format(name), '.'
]))
new_frame.assign(
name,
evaluate(expr, frame, binding_holder.expression.children[1]))
value = None
for (i, (operand, holder)) in enumerate(
zip(operands[1:], gui_holder.expression.children[2:])):
value = evaluate(operand, new_frame, holder,
(i == (len(operands) - 2)))
new_frame.assign(return_symbol, value)
return value
def execute_evaluated(self, operands: List[Expression], frame: Frame) -> Expression:
verify_exact_callable_length(self, 2, len(operands))
if log.logger.fragile:
raise IrreversibleOperationError()
pair, val = operands
if not isinstance(pair, Pair):
raise OperandDeduceError(f"set-car! expected a Pair, received {pair}.")
pair.first = val
log.logger.raw_out("WARNING: Mutation operations on pairs are not yet supported by the debugger.")
return Undefined
def execute_evaluated(self, operands: List[Expression],
frame: Frame) -> Expression:
verify_exact_callable_length(self, 3, len(operands))
x, y, c, = operands
for v in x, y:
if not isinstance(v, Number):
raise OperandDeduceError(
f"Expected operand to be Number, not {v}")
log.logger.get_canvas().pixel(x.value, y.value, make_color(c))
return Undefined
def execute_evaluated(self, operands: List[Expression],
frame: Frame) -> Expression:
for operand in operands:
if not isinstance(operand, Number):
raise MathError()
try:
return Number(self.func(*(operand.value for operand in operands)))
except TypeError:
raise OperandDeduceError(
f"Incorrect number of arguments for #[{self.name}].")
def execute(self, operands: List[Expression], frame: Frame,
gui_holder: Holder):
verify_min_callable_length(self, 2, len(operands))
bindings = operands[0]
if not isinstance(bindings, Pair) and bindings is not Nil:
raise OperandDeduceError(
f"Expected first argument of let to be a Pair, not {bindings}."
)
new_frame = Frame("anonymous let", frame)
bindings_holder = gui_holder.expression.children[1]
bindings = pair_to_list(bindings)
for i, binding in enumerate(bindings):
if not isinstance(binding, Pair):
raise OperandDeduceError(
f"Expected binding to be a Pair, not {binding}.")
binding_holder = bindings_holder.expression.children[i]
binding = pair_to_list(binding)
if len(binding) != 2:
raise OperandDeduceError(
f"Expected binding to be of length 2, not {len(binding)}.")
name, expr = binding
if not isinstance(name, Symbol):
raise OperandDeduceError(
f"Expected first element of binding to be a Symbol, not {name}."
)
new_frame.assign(
name,
evaluate(expr, frame, binding_holder.expression.children[1]))
value = None
for i, (operand, holder) in enumerate(
zip(operands[1:], gui_holder.expression.children[2:])):
value = evaluate(operand, new_frame, holder,
i == len(operands) - 2)
new_frame.assign(return_symbol, value)
return value
def execute_evaluated(self, operands: List[Expression],
frame: Frame) -> Expression:
verify_exact_callable_length(self, 2, len(operands))
if log.logger.fragile:
raise IrreversibleOperationError()
(pair, val) = operands
if (not isinstance(pair, Pair)):
raise OperandDeduceError(''.join([
'set-cdr! expected a Pair, received ', '{}'.format(pair), '.'
]))
if (not isinstance(val, (Pair, Promise, NilType))):
raise OperandDeduceError(''.join([
'Unable to assign ', '{}'.format(val),
' to cdr, expected a Pair, Nil, or Promise.'
]))
pair.rest = val
log.logger.raw_out(
'WARNING: Mutation operations on pairs are not yet supported by the debugger.'
)
return Undefined
def execute(self, operands: List[Expression], frame: Frame,
gui_holder: Holder):
verify_exact_callable_length(self, 2, len(operands))
name = operands[0]
if not isinstance(name, Symbol):
raise OperandDeduceError(
f"Expected a Symbol, not {name}, as the first operand of set!")
frame.mutate(
name,
evaluate(operands[1], frame, gui_holder.expression.children[2]))
return Undefined
def execute(self, operands: List[Expression], frame: Frame, gui_holder: Holder, eval_operands=True):
verify_exact_callable_length(self, 2, len(operands))
if eval_operands:
operands = evaluate_all(operands, frame, gui_holder.expression.children[1:])
func, args = operands
if not isinstance(func, Applicable):
raise OperandDeduceError(f"Unable to apply {func}.")
gui_holder.expression.set_entries([VisualExpression(Pair(func, args), gui_holder.expression.display_value)])
gui_holder.expression.children[0].expression.children = []
gui_holder.apply()
args = pair_to_list(args)
return func.execute(args, frame, gui_holder.expression.children[0], False)
def execute_evaluated(self, operands: List[Expression],
frame: Frame) -> Expression:
for operand in operands:
if (not isinstance(operand, Number)):
raise MathError()
try:
return Number(self.func(*(operand.value for operand in operands)))
except TypeError:
raise OperandDeduceError(''.join([
'Incorrect number of arguments for #[', '{}'.format(self.name),
'].'
]))
def execute_evaluated(self, operands: List[Expression], frame: Frame) -> Expression:
if len(operands) == 0:
return Nil
exprs = []
for operand in operands[:-1]:
if not isinstance(operand, Pair) and operand is not Nil:
raise OperandDeduceError(f"Expected operand to be valid list, not {operand}")
exprs.extend(pair_to_list(operand))
out = operands[-1]
for expr in reversed(exprs):
out = Pair(expr, out)
return out
def execute(self, operands: List[Expression], frame: Frame, gui_holder: Holder, name: str = "lambda"):
verify_min_callable_length(self, 2, len(operands))
params = operands[0]
if not logger.dotted and not isinstance(params, (Pair, NilType)):
raise OperandDeduceError(f"Expected Pair as parameter list, received {params}.")
params, var_param = dotted_pair_to_list(params)
for i, param in enumerate(params):
if (logger.dotted or i != len(params) - 1) and not isinstance(param, Symbol):
raise OperandDeduceError(f"Expected Symbol in parameter list, received {param}.")
if isinstance(param, Pair):
param_vals = pair_to_list(param)
if len(param_vals) != 2 or \
not isinstance(param_vals[0], Symbol) or \
not isinstance(param_vals[1], Symbol) or \
param_vals[0].value != "variadic":
raise OperandDeduceError(f"Each member of a parameter list must be a Symbol or a variadic "
f"parameter, not {param}.")
var_param = param_vals[1]
params.pop()
return self.procedure(params, var_param, operands[1:], frame, name)
def execute_evaluated(self, operands: List[Expression], frame: Frame) -> Expression:
if (len(operands) == 0):
return Nil
exprs = []
for operand in operands[:(- 1)]:
if ((not isinstance(operand, Pair)) and (operand is not Nil)):
raise OperandDeduceError(
''.join(['Expected operand to be valid list, not ', '{}'.format(operand)]))
exprs.extend(pair_to_list(operand))
out = operands[(- 1)]
for expr in reversed(exprs):
out = Pair(expr, out)
return out
def execute_evaluated(self, operands: List[Expression],
frame: Frame) -> Expression:
if (len(operands) == 0):
return Nil
out = []
for operand in operands[:(-1)]:
if ((not isinstance(operand, Pair)) and (operand is not Nil)):
raise OperandDeduceError(''.join([
'Expected operand to be valid list, not ',
'{}'.format(operand)
]))
out.extend(pair_to_list(operand))
try:
last = operands[(-1)]
if (not isinstance(last, Pair)):
raise OperandDeduceError()
last = pair_to_list(last)
except OperandDeduceError:
return make_list(out, operands[(-1)])
else:
out.extend(last)
return make_list(out)
def execute(self, operands: List[Expression], frame: Frame,
gui_holder: Holder):
verify_min_callable_length(self, 2, len(operands))
params = operands[0]
if isinstance(params, Symbol):
verify_exact_callable_length(self, 2, len(operands))
frame.assign(
params,
evaluate(operands[1], frame,
gui_holder.expression.children[2]))
return params
elif isinstance(params, Pair):
name = params.first
operands[0] = params.rest
if not isinstance(name, Symbol):
raise OperandDeduceError(f"Expected a Symbol, not {name}.")
frame.assign(
name,
Lambda().execute(operands, frame, gui_holder, name.value))
return name
else:
raise OperandDeduceError(
f"Expected a Pair, not {params}, as the first operand of define-macro."
)
def execute(self, operands: List[Expression], frame: Frame, gui_holder: Holder):
verify_min_callable_length(self, 1, len(operands))
for cond_i, cond in enumerate(operands):
if not isinstance(cond, Pair):
raise OperandDeduceError(f"Unable to evaluate clause of cond, as {cond} is not a Pair.")
expanded = pair_to_list(cond)
cond_holder = gui_holder.expression.children[cond_i + 1]
eval_condition = SingletonTrue
if not isinstance(expanded[0], Symbol) or expanded[0].value != "else":
eval_condition = evaluate(expanded[0], frame, cond_holder.expression.children[0])
if (isinstance(expanded[0], Symbol) and expanded[0].value == "else") \
or eval_condition is not SingletonFalse:
out = eval_condition
for i, expr in enumerate(expanded[1:]):
out = evaluate(expr, frame, cond_holder.expression.children[i + 1], i == len(expanded) - 2)
return out
return Undefined
def execute(self, operands: List[Expression], frame: Frame, gui_holder: Holder, eval_operands=True):
verify_exact_callable_length(self, 1, len(operands))
if eval_operands:
operands = evaluate_all(operands, frame, gui_holder.expression.children[1:])
if not isinstance(operands[0], Symbol):
raise OperandDeduceError(f"Load expected a Symbol, received {operands[0]}.")
if logger.fragile:
raise IrreversibleOperationError()
try:
with open(f"{operands[0].value}.scm") as file:
code = "(begin-noexcept" + "\n".join(file.readlines()) + "\n)"
buffer = TokenBuffer([code])
expr = get_expression(buffer)
gui_holder.expression.set_entries([VisualExpression(expr, gui_holder.expression.display_value)])
gui_holder.apply()
return evaluate(expr, frame, gui_holder.expression.children[0], True)
except OSError as e:
raise LoadError(e)
def execute(self, operands: List[Expression], frame: Frame, gui_holder: Holder, eval_operands=True):
verify_exact_callable_length(self, 1, len(operands))
operand = operands[0]
if eval_operands:
operand = evaluate_all(operands, frame, gui_holder.expression.children[1:])[0]
if not isinstance(operand, Promise):
raise OperandDeduceError(f"Force expected a Promise, received {operand}")
if operand.forced:
return operand.expr
if logger.fragile:
raise IrreversibleOperationError()
gui_holder.expression.set_entries([VisualExpression(operand.expr, gui_holder.expression.display_value)])
gui_holder.apply()
evaluated = evaluate(operand.expr, operand.frame, gui_holder.expression.children[0])
if not logger.dotted and not isinstance(evaluated, (Pair, NilType)):
raise TypeMismatchError(
f"Unable to force a Promise evaluating to {operand.expr}, expected another Pair or Nil")
operand.expr = evaluated
operand.force()
return operand.expr
def execute(self, operands: List[Expression], frame: Frame, gui_holder: Holder, eval_operands=True):
verify_exact_callable_length(self, 1, len(operands))
if eval_operands:
operands = evaluate_all(operands, frame, gui_holder.expression.children[1:])
if not isinstance(operands[0], String):
raise OperandDeduceError(f"Load expected a String, received {operands[0]}.")
if logger.fragile:
raise IrreversibleOperationError()
from os import listdir
from os.path import join
directory = operands[0].value
try:
targets = sorted(listdir(directory))
targets = [join(directory, target) for target in targets if target.endswith(".scm")]
exprs = [make_list([Symbol("load"), make_list([Symbol("quote"), Symbol(x[:-4])])]) for x in targets]
equiv = make_list([Symbol("begin-noexcept")] + exprs)
gui_holder.expression.set_entries([equiv])
gui_holder.apply()
return evaluate(equiv, frame, gui_holder.expression.children[0], True)
except Exception as e:
raise SchemeError(e)
def execute_simple(self, operand: Expression) -> Expression:
if (not isinstance(operand, Number)):
raise OperandDeduceError(
''.join(['Expected operand to be Number, not ', '{}'.format(operand)]))
return Undefined
def quasiquote_evaluate(cls,
expr: Expression,
frame: Frame,
gui_holder: Holder,
splicing=False):
is_well_formed = False
if isinstance(expr, Pair):
try:
lst = pair_to_list(expr)
except OperandDeduceError:
pass
else:
is_well_formed = not any(
map(
lambda x: isinstance(x, Symbol) and x.value in
["unquote", "quasiquote", "unquote-splicing"], lst))
visual_expression = gui_holder.expression
if not is_well_formed:
visual_expression.children[2:] = []
if isinstance(expr, Pair):
if isinstance(expr.first,
Symbol) and expr.first.value in ("unquote",
"unquote-splicing"):
if expr.first.value == "unquote-splicing" and not splicing:
raise OperandDeduceError(
"Unquote-splicing must be in list template.")
gui_holder.evaluate()
verify_exact_callable_length(expr.first, 1,
len(pair_to_list(expr)) - 1)
out = evaluate(expr.rest.first, frame,
visual_expression.children[1])
visual_expression.value = out
gui_holder.complete()
return out
elif isinstance(expr.first,
Symbol) and expr.first.value == "quasiquote":
visual_expression.value = expr
gui_holder.complete()
return expr
else:
if is_well_formed:
out = []
for sub_expr, holder in zip(pair_to_list(expr),
visual_expression.children):
splicing = isinstance(sub_expr, Pair) and isinstance(sub_expr.first, Symbol) \
and sub_expr.first.value == "unquote-splicing"
evaluated = Quasiquote.quasiquote_evaluate(
sub_expr, frame, holder, splicing)
if splicing:
if not isinstance(evaluated, (Pair, NilType)):
raise TypeMismatchError(
f"Can only splice lists, not {evaluated}.")
out.extend(pair_to_list(evaluated))
else:
out.append(evaluated)
out = make_list(out)
else:
if not logger.dotted:
raise OperandDeduceError(
f"{expr} is an ill-formed quasiquotation.")
out = Pair(
Quasiquote.quasiquote_evaluate(
expr.first, frame, visual_expression.children[0]),
Quasiquote.quasiquote_evaluate(
expr.rest, frame, visual_expression.children[1]))
visual_expression.value = out
gui_holder.complete()
return out
else:
visual_expression.value = expr
gui_holder.complete()
return expr
def execute_simple(self, operand: Expression) -> Expression:
if not isinstance(operand, Number):
raise OperandDeduceError(
f"Expected operand to be Number, not {operand}")
return Undefined
def execute_simple(self, operand: Expression) -> Expression:
if not isinstance(operand, Number):
raise OperandDeduceError(
f"Expected operand to be Number, not {operand}")
log.logger.get_canvas().abs_rotate(90 - operand.value)
return Undefined
def quasiquote_evaluate(cls,
expr: Expression,
frame: Frame,
gui_holder: Holder,
splicing=False):
is_well_formed = False
if isinstance(expr, Pair):
try:
lst = pair_to_list(expr)
except OperandDeduceError:
pass
else:
is_well_formed = (not any(
map((lambda x:
(isinstance(x, Symbol) and
(x.value in
['unquote', 'quasiquote', 'unquote-splicing']))),
lst)))
visual_expression = VisualExpression(expr)
gui_holder.link_visual(visual_expression)
if (not is_well_formed):
visual_expression.children[2:] = []
if isinstance(expr, Pair):
if (isinstance(expr.first, Symbol)
and (expr.first.value in ('unquote', 'unquote-splicing'))):
if ((expr.first.value == 'unquote-splicing')
and (not splicing)):
raise OperandDeduceError(
'Unquote-splicing must be in list template.')
gui_holder.evaluate()
verify_exact_callable_length(expr.first, 1,
(len(pair_to_list(expr)) - 1))
out = evaluate(expr.rest.first, frame,
visual_expression.children[1])
visual_expression.value = out
gui_holder.complete()
return out
elif (isinstance(expr.first, Symbol)
and (expr.first.value == 'quasiquote')):
visual_expression.value = expr
gui_holder.complete()
return expr
else:
if is_well_formed:
out = []
for (sub_expr, holder) in zip(pair_to_list(expr),
visual_expression.children):
splicing = (isinstance(sub_expr, Pair)
and isinstance(sub_expr.first, Symbol)
and (sub_expr.first.value
== 'unquote-splicing'))
evaluated = Quasiquote.quasiquote_evaluate(
sub_expr, frame, holder, splicing)
if splicing:
if (not isinstance(evaluated, (Pair, NilType))):
raise TypeMismatchError(''.join([
'Can only splice lists, not ',
'{}'.format(evaluated), '.'
]))
out.extend(pair_to_list(evaluated))
else:
out.append(evaluated)
out = make_list(out)
else:
if (not logger.dotted):
raise OperandDeduceError(''.join([
'{}'.format(expr),
' is an ill-formed quasiquotation.'
]))
out = Pair(
Quasiquote.quasiquote_evaluate(
expr.first, frame, visual_expression.children[0]),
Quasiquote.quasiquote_evaluate(
expr.rest, frame, visual_expression.children[1]))
visual_expression.value = out
gui_holder.complete()
return out
else:
visual_expression.value = expr
gui_holder.complete()
return expr
def execute_simple(self, operand: Expression) -> Expression:
if (not isinstance(operand, Number)):
raise OperandDeduceError(
''.join(['Expected operand to be Number, not ', '{}'.format(operand)]))
log.logger.get_canvas().abs_rotate((90 - operand.value))
return Undefined