def _assert_no_primed(self, formulae, name):
"""Raise `AssertionError` if primed vars in `formulae`."""
for f in formulae:
a = self.ast(f)
primed = tx.collect_primed_vars(a)
if primed:
raise AssertionError(
'Syntax error: ' +
'primed variables: {primed}'.format(primed=primed) +
' found in {name}: {f}'.format(f=f, name=name))
def _assert_no_primed(self, formulae, name):
"""Raise `AssertionError` if primed vars in `formulae`."""
for f in formulae:
a = self.ast(f)
primed = tx.collect_primed_vars(a)
if primed:
raise AssertionError(
'Syntax error: ' +
'primed variables: {primed}'.format(primed=primed) +
' found in {name}: {f}'.format(f=f, name=name))
def check_syntax(self):
"""Raise `AssertionError` for misplaced primed variables."""
self._assert_no_primed(self.env_init, 'assumed initial condition')
self._assert_no_primed(self.sys_init, 'guaranteed initial condition')
self._assert_no_primed(self.env_prog, 'liveness assumption')
self._assert_no_primed(self.env_prog, 'liveness guarantee')
for f in self.env_safety:
a = self.ast(f)
primed = tx.collect_primed_vars(a)
for var in primed:
if var in self.sys_vars:
raise AssertionError(
'Syntax error: ' +
'primed system variable "{var}"'.format(var=var) +
' found in env safety: {f}'.format(f=f))
def check_syntax(self):
"""Raise `AssertionError` for misplaced primed variables."""
self._assert_no_primed(self.env_init, 'assumed initial condition')
self._assert_no_primed(self.sys_init, 'guaranteed initial condition')
self._assert_no_primed(self.env_prog, 'liveness assumption')
self._assert_no_primed(self.env_prog, 'liveness guarantee')
for f in self.env_safety:
a = self.ast(f)
primed = tx.collect_primed_vars(a)
for var in primed:
if var in self.sys_vars:
raise AssertionError(
'Syntax error: ' +
'primed system variable "{var}"'.format(var=var) +
' found in env safety: {f}'.format(f=f))
