import ExprNodes
import Nodes
import Options
+import Builtin
from Cython.Compiler.Visitor import VisitorTransform, TreeVisitor
from Cython.Compiler.Visitor import CythonTransform, EnvTransform, ScopeTrackingTransform
from Cython.Compiler.ModuleNode import ModuleNode
-from Cython.Compiler.UtilNodes import LetNode, LetRefNode
+from Cython.Compiler.UtilNodes import LetNode, LetRefNode, ResultRefNode
from Cython.Compiler.TreeFragment import TreeFragment, TemplateTransform
from Cython.Compiler.StringEncoding import EncodedString
from Cython.Compiler.Errors import error, warning, CompileError, InternalError
def visit_ModuleNode(self, node):
self.lambda_counter = 1
+ self.genexpr_counter = 1
return super(PostParse, self).visit_ModuleNode(node)
def visit_LambdaNode(self, node):
lambda_id = self.lambda_counter
self.lambda_counter += 1
node.lambda_name = EncodedString(u'lambda%d' % lambda_id)
-
- body = Nodes.ReturnStatNode(
- node.result_expr.pos, value = node.result_expr)
+ collector = YieldNodeCollector()
+ collector.visitchildren(node.result_expr)
+ if collector.yields or isinstance(node.result_expr, ExprNodes.YieldExprNode):
+ body = Nodes.ExprStatNode(
+ node.result_expr.pos, expr=node.result_expr)
+ else:
+ body = Nodes.ReturnStatNode(
+ node.result_expr.pos, value=node.result_expr)
node.def_node = Nodes.DefNode(
node.pos, name=node.name, lambda_name=node.lambda_name,
args=node.args, star_arg=node.star_arg,
starstar_arg=node.starstar_arg,
- body=body)
+ body=body, doc=None)
+ self.visitchildren(node)
+ return node
+
+ def visit_GeneratorExpressionNode(self, node):
+ # unpack a generator expression into the corresponding DefNode
+ genexpr_id = self.genexpr_counter
+ self.genexpr_counter += 1
+ node.genexpr_name = EncodedString(u'genexpr%d' % genexpr_id)
+
+ node.def_node = Nodes.DefNode(node.pos, name=node.name,
+ doc=None,
+ args=[], star_arg=None,
+ starstar_arg=None,
+ body=node.loop)
self.visitchildren(node)
return node
return self.visit_Node(node)
class WithTransform(CythonTransform, SkipDeclarations):
-
- # EXCINFO is manually set to a variable that contains
- # the exc_info() tuple that can be generated by the enclosing except
- # statement.
- template_without_target = TreeFragment(u"""
- MGR = EXPR
- EXIT = MGR.__exit__
- MGR.__enter__()
- EXC = True
- try:
- try:
- EXCINFO = None
- BODY
- except:
- EXC = False
- if not EXIT(*EXCINFO):
- raise
- finally:
- if EXC:
- EXIT(None, None, None)
- """, temps=[u'MGR', u'EXC', u"EXIT"],
- pipeline=[NormalizeTree(None)])
-
- template_with_target = TreeFragment(u"""
- MGR = EXPR
- EXIT = MGR.__exit__
- VALUE = MGR.__enter__()
- EXC = True
- try:
- try:
- EXCINFO = None
- TARGET = VALUE
- BODY
- except:
- EXC = False
- if not EXIT(*EXCINFO):
- raise
- finally:
- if EXC:
- EXIT(None, None, None)
- MGR = EXIT = VALUE = EXC = None
-
- """, temps=[u'MGR', u'EXC', u"EXIT", u"VALUE"],
- pipeline=[NormalizeTree(None)])
-
def visit_WithStatNode(self, node):
- # TODO: Cleanup badly needed
- TemplateTransform.temp_name_counter += 1
- handle = "__tmpvar_%d" % TemplateTransform.temp_name_counter
-
- self.visitchildren(node, ['body'])
- excinfo_temp = ExprNodes.NameNode(node.pos, name=handle)#TempHandle(Builtin.tuple_type)
- if node.target is not None:
- result = self.template_with_target.substitute({
- u'EXPR' : node.manager,
- u'BODY' : node.body,
- u'TARGET' : node.target,
- u'EXCINFO' : excinfo_temp
- }, pos=node.pos)
- else:
- result = self.template_without_target.substitute({
- u'EXPR' : node.manager,
- u'BODY' : node.body,
- u'EXCINFO' : excinfo_temp
- }, pos=node.pos)
-
- # Set except excinfo target to EXCINFO
- try_except = result.stats[-1].body.stats[-1]
- try_except.except_clauses[0].excinfo_target = ExprNodes.NameNode(node.pos, name=handle)
-# excinfo_temp.ref(node.pos))
-
-# result.stats[-1].body.stats[-1] = TempsBlockNode(
-# node.pos, temps=[excinfo_temp], body=try_except)
-
- return result
+ self.visitchildren(node, 'body')
+ pos = node.pos
+ body, target, manager = node.body, node.target, node.manager
+ node.target_temp = ExprNodes.TempNode(pos, type=PyrexTypes.py_object_type)
+ if target is not None:
+ node.has_target = True
+ body = Nodes.StatListNode(
+ pos, stats = [
+ Nodes.WithTargetAssignmentStatNode(
+ pos, lhs = target, rhs = node.target_temp),
+ body
+ ])
+ node.target = None
+
+ excinfo_target = ResultRefNode(
+ pos=pos, type=Builtin.tuple_type, may_hold_none=False)
+ except_clause = Nodes.ExceptClauseNode(
+ pos, body = Nodes.IfStatNode(
+ pos, if_clauses = [
+ Nodes.IfClauseNode(
+ pos, condition = ExprNodes.NotNode(
+ pos, operand = ExprNodes.WithExitCallNode(
+ pos, with_stat = node,
+ args = excinfo_target)),
+ body = Nodes.ReraiseStatNode(pos),
+ ),
+ ],
+ else_clause = None),
+ pattern = None,
+ target = None,
+ excinfo_target = excinfo_target,
+ )
+
+ node.body = Nodes.TryFinallyStatNode(
+ pos, body = Nodes.TryExceptStatNode(
+ pos, body = body,
+ except_clauses = [except_clause],
+ else_clause = None,
+ ),
+ finally_clause = Nodes.ExprStatNode(
+ pos, expr = ExprNodes.WithExitCallNode(
+ pos, with_stat = node,
+ args = ExprNodes.TupleNode(
+ pos, args = [ExprNodes.NoneNode(pos) for _ in range(3)]
+ ))),
+ handle_error_case = False,
+ )
+ return node
def visit_ExprNode(self, node):
# With statements are never inside expressions.
arg = copy.deepcopy(arg_template)
arg.declarator.name = entry.name
init_method.args.append(arg)
-
+
# setters/getters
for entry, attr in zip(var_entries, attributes):
# TODO: branch on visibility
}, pos = entry.pos).stats[0]
property.name = entry.name
wrapper_class.body.stats.append(property)
-
+
wrapper_class.analyse_declarations(self.env_stack[-1])
return self.visit_CClassDefNode(wrapper_class)
def visit_CNameDeclaratorNode(self, node):
if node.name in self.seen_vars_stack[-1]:
entry = self.env_stack[-1].lookup(node.name)
- if entry is None or entry.visibility != 'extern':
+ if (entry is None or entry.visibility != 'extern'
+ and not entry.scope.is_c_class_scope):
warning(node.pos, "cdef variable '%s' declared after it is used" % node.name, 2)
self.visitchildren(node)
return node
return self.visit_CClassDefNode(node.as_cclass(), pxd_def)
else:
error(node.pos, "'%s' redeclared" % node.name)
- error(pxd_def.pos, "previous declaration here")
+ if pxd_def.pos:
+ error(pxd_def.pos, "previous declaration here")
return None
else:
return node
def visit_DefNode(self, node):
pxd_def = self.scope.lookup(node.name)
- if pxd_def:
+ if pxd_def and (not pxd_def.scope or not pxd_def.scope.is_builtin_scope):
if not pxd_def.is_cfunction:
error(node.pos, "'%s' redeclared" % node.name)
- error(pxd_def.pos, "previous declaration here")
+ if pxd_def.pos:
+ error(pxd_def.pos, "previous declaration here")
return None
node = node.as_cfunction(pxd_def)
- elif self.scope.is_module_scope and self.directives['auto_cpdef']:
+ elif (self.scope.is_module_scope and self.directives['auto_cpdef']
+ and node.is_cdef_func_compatible()):
node = node.as_cfunction(scope=self.scope)
- # Enable this when internal def functions are allowed.
+ # Enable this when nested cdef functions are allowed.
# self.visitchildren(node)
return node
+class YieldNodeCollector(TreeVisitor):
+
+ def __init__(self):
+ super(YieldNodeCollector, self).__init__()
+ self.yields = []
+ self.returns = []
+ self.has_return_value = False
+
+ def visit_Node(self, node):
+ return self.visitchildren(node)
+
+ def visit_YieldExprNode(self, node):
+ if self.has_return_value:
+ error(node.pos, "'yield' outside function")
+ self.yields.append(node)
+ self.visitchildren(node)
+
+ def visit_ReturnStatNode(self, node):
+ if node.value:
+ self.has_return_value = True
+ if self.yields:
+ error(node.pos, "'return' with argument inside generator")
+ self.returns.append(node)
+
+ def visit_ClassDefNode(self, node):
+ pass
+
+ def visit_FuncDefNode(self, node):
+ pass
+
+ def visit_LambdaNode(self, node):
+ pass
+
+ def visit_GeneratorExpressionNode(self, node):
+ pass
+
class MarkClosureVisitor(CythonTransform):
def visit_ModuleNode(self, node):
self.visitchildren(node)
node.needs_closure = self.needs_closure
self.needs_closure = True
+
+ collector = YieldNodeCollector()
+ collector.visitchildren(node)
+
+ if collector.yields:
+ for i, yield_expr in enumerate(collector.yields):
+ yield_expr.label_num = i + 1
+
+ gbody = Nodes.GeneratorBodyDefNode(pos=node.pos,
+ name=node.name,
+ body=node.body)
+ generator = Nodes.GeneratorDefNode(pos=node.pos,
+ name=node.name,
+ args=node.args,
+ star_arg=node.star_arg,
+ starstar_arg=node.starstar_arg,
+ doc=node.doc,
+ decorators=node.decorators,
+ gbody=gbody,
+ lambda_name=node.lambda_name)
+ return generator
return node
def visit_CFuncDefNode(self, node):
self.needs_closure = True
return node
-
class CreateClosureClasses(CythonTransform):
# Output closure classes in module scope for all functions
# that really need it.
super(CreateClosureClasses, self).__init__(context)
self.path = []
self.in_lambda = False
+ self.generator_class = None
def visit_ModuleNode(self, node):
self.module_scope = node.scope
self.visitchildren(node)
return node
- def get_scope_use(self, node):
+ def create_generator_class(self, target_module_scope, pos):
+ if self.generator_class:
+ return self.generator_class
+ # XXX: make generator class creation cleaner
+ entry = target_module_scope.declare_c_class(name='__pyx_Generator',
+ objstruct_cname='__pyx_Generator_object',
+ typeobj_cname='__pyx_Generator_type',
+ pos=pos, defining=True, implementing=True)
+ klass = entry.type.scope
+ klass.is_internal = True
+ klass.directives = {'final': True}
+
+ body_type = PyrexTypes.create_typedef_type('generator_body',
+ PyrexTypes.c_void_ptr_type,
+ '__pyx_generator_body_t')
+ klass.declare_var(pos=pos, name='body', cname='body',
+ type=body_type, is_cdef=True)
+ klass.declare_var(pos=pos, name='is_running', cname='is_running', type=PyrexTypes.c_int_type,
+ is_cdef=True)
+ klass.declare_var(pos=pos, name='resume_label', cname='resume_label', type=PyrexTypes.c_int_type,
+ is_cdef=True)
+ klass.declare_var(pos=pos, name='exc_type', cname='exc_type',
+ type=PyrexTypes.py_object_type, is_cdef=True)
+ klass.declare_var(pos=pos, name='exc_value', cname='exc_value',
+ type=PyrexTypes.py_object_type, is_cdef=True)
+ klass.declare_var(pos=pos, name='exc_traceback', cname='exc_traceback',
+ type=PyrexTypes.py_object_type, is_cdef=True)
+
+ import TypeSlots
+ e = klass.declare_pyfunction('send', pos)
+ e.func_cname = '__Pyx_Generator_Send'
+ e.signature = TypeSlots.binaryfunc
+
+ e = klass.declare_pyfunction('close', pos)
+ e.func_cname = '__Pyx_Generator_Close'
+ e.signature = TypeSlots.unaryfunc
+
+ e = klass.declare_pyfunction('throw', pos)
+ e.func_cname = '__Pyx_Generator_Throw'
+ e.signature = TypeSlots.pyfunction_signature
+
+ e = klass.declare_var('__iter__', PyrexTypes.py_object_type, pos, visibility='public')
+ e.func_cname = 'PyObject_SelfIter'
+
+ e = klass.declare_var('__next__', PyrexTypes.py_object_type, pos, visibility='public')
+ e.func_cname = '__Pyx_Generator_Next'
+
+ self.generator_class = entry.type
+ return self.generator_class
+
+ def find_entries_used_in_closures(self, node):
from_closure = []
in_closure = []
for name, entry in node.local_scope.entries.items():
if entry.from_closure:
from_closure.append((name, entry))
- elif entry.in_closure and not entry.from_closure:
+ elif entry.in_closure:
in_closure.append((name, entry))
return from_closure, in_closure
def create_class_from_scope(self, node, target_module_scope, inner_node=None):
- from_closure, in_closure = self.get_scope_use(node)
+ # skip generator body
+ if node.is_generator_body:
+ return
+ # move local variables into closure
+ if node.is_generator:
+ for entry in node.local_scope.entries.values():
+ if not entry.from_closure:
+ entry.in_closure = True
+
+ from_closure, in_closure = self.find_entries_used_in_closures(node)
in_closure.sort()
# Now from the begining
inner_node = node.assmt.rhs
inner_node.needs_self_code = False
node.needs_outer_scope = False
- # Simple cases
- if not in_closure and not from_closure:
+
+ base_type = None
+ if node.is_generator:
+ base_type = self.create_generator_class(target_module_scope, node.pos)
+ elif not in_closure and not from_closure:
return
elif not in_closure:
func_scope.is_passthrough = True
as_name = '%s_%s' % (target_module_scope.next_id(Naming.closure_class_prefix), node.entry.cname)
- entry = target_module_scope.declare_c_class(name = as_name,
- pos = node.pos, defining = True, implementing = True)
+ entry = target_module_scope.declare_c_class(
+ name=as_name, pos=node.pos, defining=True,
+ implementing=True, base_type=base_type)
+
func_scope.scope_class = entry
class_scope = entry.type.scope
class_scope.is_internal = True
is_cdef=True)
node.needs_outer_scope = True
for name, entry in in_closure:
- class_scope.declare_var(pos=entry.pos,
+ closure_entry = class_scope.declare_var(pos=entry.pos,
name=entry.name,
cname=entry.cname,
type=entry.type,
is_cdef=True)
+ if entry.is_declared_generic:
+ closure_entry.is_declared_generic = 1
node.needs_closure = True
# Do it here because other classes are already checked
target_module_scope.check_c_class(func_scope.scope_class)
error(node.pos, u"'%s' not a valid cython attribute or is being used incorrectly" % attribute)
return node
- def visit_SimpleCallNode(self, node):
+ def _inject_locals(self, node, func_name):
+ # locals()/dir() builtins
+ lenv = self.current_env()
+ entry = lenv.lookup_here(func_name)
+ if entry:
+ # not the builtin
+ return node
+ pos = node.pos
+ if func_name == 'locals':
+ if len(node.args) > 0:
+ error(self.pos, "Builtin 'locals()' called with wrong number of args, expected 0, got %d"
+ % len(node.args))
+ return node
+ items = [ ExprNodes.DictItemNode(pos,
+ key=ExprNodes.StringNode(pos, value=var),
+ value=ExprNodes.NameNode(pos, name=var))
+ for var in lenv.entries ]
+ return ExprNodes.DictNode(pos, key_value_pairs=items)
+ else:
+ if len(node.args) > 1:
+ error(self.pos, "Builtin 'dir()' called with wrong number of args, expected 0-1, got %d"
+ % len(node.args))
+ return node
+ elif len(node.args) == 1:
+ # optimised in Builtin.py
+ return node
+ items = [ ExprNodes.StringNode(pos, value=var) for var in lenv.entries ]
+ return ExprNodes.ListNode(pos, args=items)
- # locals builtin
+ def visit_SimpleCallNode(self, node):
if isinstance(node.function, ExprNodes.NameNode):
- if node.function.name == 'locals':
- lenv = self.current_env()
- entry = lenv.lookup_here('locals')
- if entry:
- # not the builtin 'locals'
- return node
- if len(node.args) > 0:
- error(self.pos, "Builtin 'locals()' called with wrong number of args, expected 0, got %d" % len(node.args))
- return node
- pos = node.pos
- items = [ ExprNodes.DictItemNode(pos,
- key=ExprNodes.StringNode(pos, value=var),
- value=ExprNodes.NameNode(pos, name=var))
- for var in lenv.entries ]
- return ExprNodes.DictNode(pos, key_value_pairs=items)
+ func_name = node.function.name
+ if func_name in ('dir', 'locals'):
+ return self._inject_locals(node, func_name)
# cython.foo
function = node.function.as_cython_attribute()
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