def remove_vars_match(mat, fmla):
""" Remove the variables bindings from a match. This is used to
prevent variable capture when applying the match to premises. Make sure free variables
are not captured by fmla """
res = dict((s, v) for s, v in mat.iteritems() if il.is_ui_sort(s))
sympairs = [(s, v) for s, v in mat.iteritems() if il.is_constant(s)]
symfmlas = il.rename_vars_no_clash([v for s, v in sympairs], [fmla])
res.update((s, w) for (s, v), w in zip(sympairs, symfmlas))
return res
def remove_vars_match(mat,fmla):
""" Remove the variables bindings from a match. This is used to
prevent variable capture when applying the match to premises. Make sure free variables
are not captured by fmla """
res = dict((s,v) for s,v in mat.iteritems() if il.is_ui_sort(s))
sympairs = [(s,v) for s,v in mat.iteritems() if il.is_constant(s)]
symfmlas = il.rename_vars_no_clash([v for s,v in sympairs],[fmla])
res.update((s,w) for (s,v),w in zip(sympairs,symfmlas))
# show_match(res)
return res
def strip_action(ast, strip_map, strip_binding):
if isinstance(ast, ia.CallAction):
name = canon_act(ast.args[0].rep)
args = [
strip_action(arg, strip_map, strip_binding)
for arg in ast.args[0].args
]
strip_params = get_strip_params(name, ast.args[0].args, strip_map,
strip_binding, ast)
call = ast.args[0].clone(args[len(strip_params):])
return ast.clone([call] + [
strip_action(arg, strip_map, strip_binding) for arg in ast.args[1:]
])
if isinstance(ast, ia.AssignAction):
if ast.args[0].rep.name in ivy_logic.sig.symbols:
lhs_params = strip_map_lookup(ast.args[0].rep.name, strip_map)
if len(lhs_params) != num_isolate_params:
raise iu.IvyError(ast, "assignment may be interfering")
if (ivy_logic.is_constant(ast)
or ivy_logic.is_variable(ast)) and ast in strip_binding:
sname = strip_binding[ast]
if sname not in ivy_logic.sig.symbols:
ivy_logic.add_symbol(sname, ast.sort)
strip_added_symbols.append(ivy_logic.Symbol(sname, ast.sort))
return ivy_logic.Symbol(sname, ast.sort)
args = [strip_action(arg, strip_map, strip_binding) for arg in ast.args]
if ivy_logic.is_app(ast):
name = ast.rep.name
strip_params = get_strip_params(name, ast.args, strip_map,
strip_binding, ast)
if strip_params:
new_sort = strip_sort(ast.rep.sort, strip_params)
new_args = args[len(strip_params):]
new_symbol = ivy_logic.Symbol(name, new_sort)
return new_symbol(*new_args)
if isinstance(ast, ivy_ast.Atom):
name = ast.rep
strip_params = get_strip_params(name, ast.args, strip_map,
strip_binding, ast)
if strip_params:
new_args = args[len(strip_params):]
return ast.clone(new_args)
return ast.clone(args)
def strip_action(ast,strip_map,strip_binding):
if isinstance(ast,ia.CallAction):
name = ast.args[0].rep
args = [strip_action(arg,strip_map,strip_binding) for arg in ast.args[0].args]
strip_params = get_strip_params(name,ast.args[0].args,strip_map,strip_binding,ast)
call = ast.args[0].clone(args[len(strip_params):])
return ast.clone([call]+[strip_action(arg,strip_map,strip_binding) for arg in ast.args[1:]])
if (ivy_logic.is_constant(ast) or ivy_logic.is_variable(ast)) and ast in strip_binding:
sname = strip_binding[ast]
if sname not in ivy_logic.sig.symbols:
ivy_logic.add_symbol(sname,ast.sort)
return ivy_logic.Symbol(sname,ast.sort)
args = [strip_action(arg,strip_map,strip_binding) for arg in ast.args]
if ivy_logic.is_app(ast):
name = ast.rep.name
strip_params = get_strip_params(name,ast.args,strip_map,strip_binding,ast)
if strip_params:
new_sort = strip_sort(ast.rep.sort,strip_params)
new_args = args[len(strip_params):]
new_symbol = ivy_logic.Symbol(name,new_sort)
return new_symbol(*new_args)
return ast.clone(args)
def unlikely(fmla):
# remove if possible the =constant predicates
return ivy_logic.is_eq(fmla) and ivy_logic.is_constant(fmla.args[0])
def unlikely(fmla):
# remove if possible the =constant predicates
return ivy_logic.is_eq(fmla) and ivy_logic.is_constant(
fmla.args[0])
