本文整理汇总了Python中ExprNodes类的典型用法代码示例。如果您正苦于以下问题：Python ExprNodes类的具体用法？Python ExprNodes怎么用？Python ExprNodes使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了ExprNodes类的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: visit_ForInStatNode
def visit_ForInStatNode(self, node):
# TODO: Remove redundancy with range optimization...
is_special = False
sequence = node.iterator.sequence
if isinstance(sequence, ExprNodes.SimpleCallNode):
function = sequence.function
if sequence.self is None and function.is_name:
if function.name in ('range', 'xrange'):
is_special = True
for arg in sequence.args[:2]:
self.mark_assignment(node.target, arg)
if len(sequence.args) > 2:
self.mark_assignment(
node.target,
ExprNodes.binop_node(node.pos,
'+',
sequence.args[0],
sequence.args[2]))
if not is_special:
# A for-loop basically translates to subsequent calls to
# __getitem__(), so using an IndexNode here allows us to
# naturally infer the base type of pointers, C arrays,
# Python strings, etc., while correctly falling back to an
# object type when the base type cannot be handled.
self.mark_assignment(node.target, ExprNodes.IndexNode(
node.pos,
base = sequence,
index = ExprNodes.IntNode(node.pos, value = '0')))
self.visitchildren(node)
return node示例2: visit_ForFromStatNode
def visit_ForFromStatNode(self, node):
condition_block = self.flow.nextblock()
next_block = self.flow.newblock()
# Condition with iterator
self.flow.loops.append(LoopDescr(next_block, condition_block))
self.visit(node.bound1)
self.visit(node.bound2)
if node.step is not None:
self.visit(node.step)
# Target assignment
self.flow.nextblock()
self.mark_assignment(node.target, node.bound1)
if node.step is not None:
self.mark_assignment(node.target, ExprNodes.binop_node(node.pos, "+", node.bound1, node.step))
# Body block
self.flow.nextblock()
self.visit(node.body)
self.flow.loops.pop()
# Loop it
if self.flow.block:
self.flow.block.add_child(condition_block)
# Else clause
if node.else_clause:
self.flow.nextblock(parent=condition_block)
self.visit(node.else_clause)
if self.flow.block:
self.flow.block.add_child(next_block)
else:
condition_block.add_child(next_block)
if next_block.parents:
self.flow.block = next_block
else:
self.flow.block = None
return node示例3: visit_ForInStatNode
def visit_ForInStatNode(self, node):
# TODO: Remove redundancy with range optimization...
is_special = False
sequence = node.iterator.sequence
target = node.target
if isinstance(sequence, ExprNodes.SimpleCallNode):
function = sequence.function
if sequence.self is None and function.is_name:
entry = self.current_env().lookup(function.name)
if not entry or entry.is_builtin:
if function.name == "reversed" and len(sequence.args) == 1:
sequence = sequence.args[0]
elif function.name == "enumerate" and len(sequence.args) == 1:
if target.is_sequence_constructor and len(target.args) == 2:
iterator = sequence.args[0]
if iterator.is_name:
iterator_type = iterator.infer_type(self.current_env())
if iterator_type.is_builtin_type:
# assume that builtin types have a length within Py_ssize_t
self.mark_assignment(
target.args[0],
ExprNodes.IntNode(
target.pos, value="PY_SSIZE_T_MAX", type=PyrexTypes.c_py_ssize_t_type
),
)
target = target.args[1]
sequence = sequence.args[0]
if isinstance(sequence, ExprNodes.SimpleCallNode):
function = sequence.function
if sequence.self is None and function.is_name:
entry = self.current_env().lookup(function.name)
if not entry or entry.is_builtin:
if function.name in ("range", "xrange"):
is_special = True
for arg in sequence.args[:2]:
self.mark_assignment(target, arg)
if len(sequence.args) > 2:
self.mark_assignment(
target, ExprNodes.binop_node(node.pos, "+", sequence.args[0], sequence.args[2])
)
if not is_special:
# A for-loop basically translates to subsequent calls to
# __getitem__(), so using an IndexNode here allows us to
# naturally infer the base type of pointers, C arrays,
# Python strings, etc., while correctly falling back to an
# object type when the base type cannot be handled.
self.mark_assignment(
target,
ExprNodes.IndexNode(
node.pos,
base=sequence,
index=ExprNodes.IntNode(target.pos, value="PY_SSIZE_T_MAX", type=PyrexTypes.c_py_ssize_t_type),
),
)
self.visitchildren(node)
return node示例4: visit_ForFromStatNode
def visit_ForFromStatNode(self, node):
self.mark_assignment(node.target, node.bound1)
if node.step is not None:
self.mark_assignment(node.target,
ExprNodes.binop_node(node.pos,
'+',
node.bound1,
node.step))
self.visitchildren(node)
return node示例5: visit_ForInStatNode
def visit_ForInStatNode(self, node):
# TODO: Remove redundancy with range optimization...
is_special = False
sequence = node.iterator.sequence
if isinstance(sequence, ExprNodes.SimpleCallNode):
function = sequence.function
if sequence.self is None and function.is_name:
if function.name in ('range', 'xrange'):
is_special = True
for arg in sequence.args[:2]:
self.mark_assignment(node.target, arg)
if len(sequence.args) > 2:
self.mark_assignment(
node.target,
ExprNodes.binop_node(node.pos,
'+',
sequence.args[0],
sequence.args[2]))
if not is_special:
self.mark_assignment(node.target, object_expr)
self.visitchildren(node)
return node