本文整理匯總了Python中SymbolTable.SymbolTable.set_return_present方法的典型用法代碼示例。如果您正苦於以下問題：Python SymbolTable.set_return_present方法的具體用法？Python SymbolTable.set_return_present怎麽用？Python SymbolTable.set_return_present使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類SymbolTable.SymbolTable的用法示例。
在下文中一共展示了SymbolTable.set_return_present方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: TypeChecker
# 需要導入模塊: from SymbolTable import SymbolTable [as 別名]
# 或者: from SymbolTable.SymbolTable import set_return_present [as 別名]
#.........這裏部分代碼省略.........
print("Error: Variable '%s' undefined in current scope: line %d" % (self.visit(node.target), node.lineno))
elif expression_ret_type:
TypeChecker.check_type_consistency(node, declared_type, expression_ret_type)
def visit_IfInstr(self, node):
self.visit(node.condition)
self.visit(node.body)
if node.else_body:
self.visit(node.else_body)
def visit_WhileInstr(self, node):
self.visit(node.condition)
self.symbol_table.set_inside_loop(1)
self.visit(node.body)
self.symbol_table.set_inside_loop(0)
def visit_RepeatInstr(self, node):
self.symbol_table.set_inside_loop(1)
for item in node.body:
self.visit(item)
self.visit(node.condition)
self.symbol_table.set_inside_loop(0)
def visit_ReturnInstr(self, node):
ret_type = self.get_return_type(node.expression)
scope = self.symbol_table
while scope and scope.name != "FunctionDef":
scope = scope.get_parent_scope()
if scope:
fun_def = scope.get(scope.function_name)
if fun_def:
function_ret_type = fun_def.type.name
scope.set_return_present(1)
if ret_type and function_ret_type:
if function_ret_type == 'int' and ret_type == 'float':
print("Warning: Possible loss of precision: returning %s from function returning %s: line %s" %
(ret_type, function_ret_type, node.lineno))
elif function_ret_type == 'float' and ret_type == 'int':
pass
elif ret_type != function_ret_type:
print("Error: Improper returned type, expected %s, got %s: line %s" %
(function_ret_type, ret_type, node.lineno))
else:
# should not happen...
print("something bad happened while parsing or checking")
else:
print("Error: return instruction outside a function: line %s" % node.lineno)
def visit_ContinueInstr(self, node):
if not self.symbol_table.is_inside_loop():
print("Error: continue instruction outside a loop: line %s" % node.lineno)
def visit_BreakInstr(self, node):
if not self.symbol_table.is_inside_loop():
print("Error: break instruction outside a loop: line %s" % node.lineno)
def visit_CompoundInstr(self, node):
self.symbol_table = self.symbol_table.push_scope("CompoundInstr")
for item in node.declarations:
self.visit(item)
for item in node.instructions:
self.visit(item)
self.symbol_table = self.symbol_table.pop_scope()
def visit_BinaryExpr(self, node):