def visit_Call_Aggregate_only(self, node: ast.Call):
'''
- (acc lambda): the accumulator is set to the first element, and the lambda is called to
update it after that. This is called `agg_only`.
'''
agg_lambda = node.args[0]
# Get the sequence we are calling against and the accumulator
if not isinstance(node.func, ast.Attribute):
raise BaseException("Wrong type of function")
seq = self.as_sequence(node.func.value)
accumulator, accumulator_scope = self.create_accumulator(seq)
# We have to do a simple if statement here so that the first time through we can set the
# accumulator, and the second time we can add to it.
is_first_iter = crep.cpp_variable(unique_name("is_first"),
self._gc.current_scope(),
cpp_type=ctyp.terminal('bool'),
initial_value=crep.cpp_value(
'true', self._gc.current_scope(),
ctyp.terminal('bool')))
accumulator_scope.declare_variable(is_first_iter)
# Set the scope where we will be doing the accumulation
sv = seq.sequence_value()
if isinstance(sv, crep.cpp_sequence):
self._gc.set_scope(sv.iterator_value().scope()[-1])
else:
self._gc.set_scope(sv.scope())
# Code up if statement to select out the first element.
if_first = statement.iftest(is_first_iter)
self._gc.add_statement(if_first)
self._gc.add_statement(
statement.set_var(
is_first_iter,
crep.cpp_value("false", self._gc.current_scope(),
ctyp.terminal('bool'))))
# Set the accumulator
self._gc.add_statement(
statement.set_var(accumulator, seq.sequence_value()))
self._gc.pop_scope()
# Now do the if statement and make the call to calculate the accumulation.
self._gc.add_statement(statement.elsephrase())
call = ast.Call(
func=agg_lambda,
args=[accumulator.as_ast(),
seq.sequence_value().as_ast()])
self._gc.add_statement(
statement.set_var(accumulator, self.get_rep(call)))
# Finally, since this is a terminal, we need to pop off the top.
self._gc.set_scope(accumulator_scope)
# Cache the results in our result in case we are skipping nodes in the AST.
node.rep = accumulator
self._result = accumulator
def test_expression_pointer_decl():
e2 = crep.cpp_value("dude", top_level_scope(), ctyp.terminal("int"))
assert False == e2.is_pointer()
e3 = crep.cpp_value("dude", top_level_scope(),
ctyp.terminal("int", is_pointer=True))
assert True == e3.is_pointer()
def test_deepest_scope_equal():
g = generated_code()
s1 = statement.iftest("true")
s2 = statement.set_var("v1", "true")
g.add_statement(s1)
scope_1 = g.current_scope()
v1 = crep.cpp_value("v1", scope_1, ctyp.terminal('int'))
v2 = crep.cpp_value("v2", scope_1, ctyp.terminal('int'))
assert v1 == deepest_scope(v1, v2)
assert v2 == deepest_scope(v2, v1)
def getAttributeFloatAst(call_node: ast.Call):
r'''
Return an attribute on one of the xAOD objects.
'''
# Get the name of the moment out
if len(call_node.args) != 1:
raise BaseException(
"Calling getMomentFloat - only one argument is allowed")
if not isinstance(call_node.args[0], ast.Str):
raise BaseException(
"Calling getMomentFloat - only acceptable argument is a string")
r = cpp_ast.CPPCodeValue()
# We don't need include files for this - just quick access
r.args = [
'moment_name',
]
r.replacement_instance_obj = ('obj_j', call_node.func.value.id)
r.running_code += [
'float result = obj_j->getAttribute<float>(moment_name);'
]
r.result = 'result'
r.result_rep = lambda sc: crep.cpp_variable(
unique_name("jet_attrib"), scope=sc, cpp_type=ctyp.terminal('float'))
# Replace it as the function that is going to get called.
call_node.func = r
return call_node
def determine_type_mf(parent_type, function_name):
'''
Determine the return type of the member function. Do our best to make
an intelligent case when we can.
parent_type: the type of the parent
function_name: the name of the function we are calling
'''
# If we don't know the type...
if parent_type is None:
raise BaseException(
"Internal Error: Trying to call member function for a type we do not know!"
)
# If we are doing one of the normal "terminals", then we can just bomb. This should not happen!
rtn_type = ctyp.method_type_info(str(parent_type), function_name)
if rtn_type is not None:
return rtn_type
# We didn't know it. Lets make a guess, and error out if we are clearly making a mistake.
base_types = ['double', 'float', 'int']
s_parent_type = str(parent_type)
if s_parent_type in base_types:
raise xAODTranslationError(
f'Unable to call method {function_name} on type {str(parent_type)}.'
)
# Ok - we give up. Return a double.
print(
f"Warning: assumping that the method '{str(s_parent_type)}.{function_name}(...)' has return type 'double'. Use cpp_types.add_method_type_info to suppress (or correct) this warning."
)
return ctyp.terminal('double')
def getAttributeVectorFloatAst(call_node: ast.Call):
r'''
Return a cpp ast accessing a vector of doubles for an xAOD attribute
'''
# Get the name of the moment out
if len(call_node.args) != 1:
raise BaseException(
"Calling getMomentFloat - only one argument is allowed")
if not isinstance(call_node.args[0], ast.Str):
raise BaseException(
"Calling getMomentFloat - only acceptable argument is a string")
r = cpp_ast.CPPCodeValue()
r.include_files += ['vector']
r.args = [
'moment_name',
]
r.replacement_instance_obj = ('obj_j', call_node.func.value.id)
r.running_code += [
'auto result = obj_j->getAttribute<std::vector<double>>(moment_name);'
]
r.result = 'result'
r.result_rep = lambda sc: crep.cpp_collection(
unique_name("jet_vec_attrib_"),
scope=sc,
collection_type=ctyp.collection(ctyp.terminal('double')))
# Replace it as the function that is going to get called.
call_node.func = r
return call_node
def visit_IfExp(self, node):
r'''
We'd like to be able to use the "?" operator in C++, but the
problem is lazy evaluation. It could be when we look at one or the
other item, a bunch of prep work has to be done - and that will
show up in separate statements. So we have to use if/then/else with
a result value.
'''
# The result we'll store everything in.
result = crep.cpp_variable(unique_name("if_else_result"),
self._gc.current_scope(),
cpp_type=ctyp.terminal("double"))
self._gc.declare_variable(result)
# We always have to evaluate the test.
current_scope = self._gc.current_scope()
test_expr = self.get_rep(node.test)
self._gc.add_statement(statement.iftest(test_expr))
if_scope = self._gc.current_scope()
# Next, we do the true and false if statement.
self._gc.add_statement(
statement.set_var(result, self.get_rep(node.body)))
self._gc.set_scope(if_scope)
self._gc.pop_scope()
self._gc.add_statement(statement.elsephrase())
self._gc.add_statement(
statement.set_var(result, self.get_rep(node.orelse)))
self._gc.set_scope(current_scope)
# Done, the result is the rep of this node!
node.rep = result
self._result = result
def visit_First(self, node):
'We are in a sequence. Take the first element of the sequence and use that for future things.'
# Make sure we are in a loop.
seq = self.as_sequence(node.source)
# The First terminal works by protecting the code with a if (first_time) {} block.
# We need to declare the first_time variable outside the block where the thing we are
# looping over here is defined. This is a little tricky, so we delegate to another method.
loop_scope = seq.iterator_value().scope()
outside_block_scope = loop_scope[-1]
# Define the variable to track this outside that block.
is_first = crep.cpp_variable(unique_name('is_first'),
outside_block_scope,
cpp_type=ctyp.terminal('bool'),
initial_value=crep.cpp_value(
'true', self._gc.current_scope(),
ctyp.terminal('bool')))
outside_block_scope.declare_variable(is_first)
# Now, as long as is_first is true, we can execute things inside this statement.
# The trick is putting the if statement in the right place. We need to locate it just one level
# below where we defined the scope above.
s = statement.iftest(is_first)
s.add_statement(
statement.set_var(
is_first,
crep.cpp_value('false',
top_level_scope(),
cpp_type=ctyp.terminal('bool'))))
sv = seq.sequence_value()
if isinstance(sv, crep.cpp_sequence):
self._gc.set_scope(sv.iterator_value().scope()[-1])
else:
self._gc.set_scope(sv.scope())
self._gc.add_statement(s)
# If we just found the first sequence in a sequence, return that.
# Otherwise return a new version of the value.
first_value = sv if isinstance(
sv, crep.cpp_sequence) else sv.copy_with_new_scope(
self._gc.current_scope())
node.rep = first_value
self._result = first_value
def test_can_call_prodVtx():
ctyp.add_method_type_info(
"xAOD::TruthParticle", "prodVtx",
ctyp.terminal('xAODTruth::TruthVertex', is_pointer=True))
EventDataset("file://root.root") \
.Select("lambda e: e.TruthParticles('TruthParticles').Select(lambda t: t.prodVtx().x()).Sum()") \
.AsROOTTTree('root.root', 'dude', "n_jets") \
.value(executor=exe_for_test)
def visit_Compare(self, node):
'A compare between two things. Python supports more than that, but not implemented yet.'
if len(node.ops) != 1:
raise BaseException("Do not support 1 < a < 10 comparisons yet!")
left = self.get_rep(node.left)
right = self.get_rep(node.comparators[0])
r = crep.cpp_value(
'({0}{1}{2})'.format(left.as_cpp(),
compare_operations[type(node.ops[0])],
right.as_cpp()), self._gc.current_scope(),
ctyp.terminal("bool"))
node.rep = r
self._result = r
def test_int_pointer():
t_int = ctyp.terminal('int')
assert False == t_int.is_pointer()
def __init__(self, filename, treename, scope):
cpp_value.__init__(self, unique_name("pandas"), scope,
ctyp.terminal("pandasdf"))
self.filename = filename
self.treename = treename
def __init__(self, filename, treename, scope):
cpp_value.__init__(self, unique_name("awk_array"), scope,
ctyp.terminal("awkwardarray"))
self.filename = filename
self.treename = treename
def __init__(self, filename, treename, scope):
cpp_value.__init__(self, unique_name("ttree_rep"), scope,
ctyp.terminal("ttreetfile"))
self.filename = filename
self.treename = treename
def element_type(self):
'Return the type of the elements in the collection'
return ctyp.terminal(self._element_name, is_pointer=True)
r.running_code += ['{0} result = 0;'.format(info['container_type']),
'ANA_CHECK (evtStore()->retrieve(result, collection_name));']
r.result = 'result'
is_collection = info['is_collection'] if 'is_collection' in info else True
if is_collection:
r.result_rep = lambda scope: crep.cpp_collection(unique_name(info['function_name'].lower()), scope=scope, collection_type=info['container_type'])
else:
r.result_rep = lambda scope: crep.cpp_variable(unique_name(info['function_name'].lower()), scope=scope, cpp_type=info['container_type'])
# Replace it as the function that is going to get called.
call_node.func = r
return call_node
# Config everything.
def create_higher_order_function(info):
'Creates a higher-order function because python scoping is broken'
return lambda call_node: getCollection(info, call_node)
for info in collections:
cpp_ast.method_names[info['function_name']] = create_higher_order_function(info)
# Configure some info about the types.
# TODO: Make a way to do this in client programs, or automate the parsing of types
ctyp.add_method_type_info("xAOD::TruthParticle", "prodVtx", ctyp.terminal('xAODTruth::TruthVertex', is_pointer=True))
ctyp.add_method_type_info("xAOD::TruthParticle", "decayVtx", ctyp.terminal('xAODTruth::TruthVertex', is_pointer=True))
def guess_type_from_number(n):
if int(n) == n:
return ctyp.terminal("int")
return ctyp.terminal("double")
def test_method_type_found():
ctyp.add_method_type_info("bogus", "pt", ctyp.terminal('double'))
assert 'double' == str(ctyp.method_type_info("bogus", "pt"))
def visit_Str(self, node):
node.rep = crep.cpp_value('"{0}"'.format(node.s),
self._gc.current_scope(),
ctyp.terminal("string"))
self._result = node.rep