本文整理汇总了Python中SymbolTable.SymbolTable.start_subroutine方法的典型用法代码示例。如果您正苦于以下问题：Python SymbolTable.start_subroutine方法的具体用法？Python SymbolTable.start_subroutine怎么用？Python SymbolTable.start_subroutine使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类SymbolTable.SymbolTable的用法示例。
在下文中一共展示了SymbolTable.start_subroutine方法的1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: __init__
# 需要导入模块: from SymbolTable import SymbolTable [as 别名]
# 或者: from SymbolTable.SymbolTable import start_subroutine [as 别名]
class CompilationEngine:
def __init__(self, input_file, output_file):
self.jack_tokenizer = JackTokenizer(input_file)
self.symbol_table = SymbolTable()
self.writer = VMWriter(output_file)
self.class_name = ""
self.subroutine_name = ""
self.return_type = ""
self.label_counter_if = 0
self.label_counter_while = 0
self.num_args_called_function = 0
self.is_unary = False
self.dic_arithmetic = {"+" : "add" , "-" : "sub", "*" : "call Math.multiply 2",
"/" : "call Math.divide 2", "&" : "and", "|" : "or", "<" : "lt", ">" : "gt", "=" : "eq"}
def compile_class(self):
# "class className {
for i in range(NUM_TOKENS_CLASS_DEC):
self.jack_tokenizer.has_more_tokens()
self.jack_tokenizer.advance()
# saves the className
if self.jack_tokenizer.token_type() == IDENTIFIER:
self.class_name = self.jack_tokenizer.identifier()
# classVarDec* or SubroutineDec*
while self.jack_tokenizer.has_more_tokens():
self.jack_tokenizer.advance()
token_type = self.jack_tokenizer.token_type()
if token_type == KEYWORD and (self.jack_tokenizer.key_word() == "static" or
self.jack_tokenizer.key_word() == "field"):
self.compile_class_var_dec()
if token_type == KEYWORD and (self.jack_tokenizer.key_word() == "function" or
self.jack_tokenizer.key_word() == "method" or
self.jack_tokenizer.key_word() == "constructor"):
self.compile_subroutine()
if token_type == SYMBOL and self.jack_tokenizer.symbol() == "}":
break
def compile_class_var_dec(self):
# "static" of "field"
kind = self.jack_tokenizer.key_word()
self.jack_tokenizer.has_more_tokens()
self.jack_tokenizer.advance()
# type
if self.jack_tokenizer.token_type() == KEYWORD:
type = self.jack_tokenizer.key_word()
else:
type = self.jack_tokenizer.identifier()
while self.jack_tokenizer.has_more_tokens():
self.jack_tokenizer.advance()
token_type = self.jack_tokenizer.token_type()
if token_type == IDENTIFIER:
name = self.jack_tokenizer.identifier()
self.symbol_table.define(name,type,kind)
elif token_type == SYMBOL:
if self.jack_tokenizer.symbol() == ";":
break
def compile_subroutine(self):
self.symbol_table.start_subroutine()
self.subroutine_name = ""
self.return_type = ""
self.label_counter_if = 0
self.label_counter_while = 0
# the curr token : "constructor" or "function" or "method
type_of_subroutine = self.jack_tokenizer.key_word()
self.jack_tokenizer.has_more_tokens()
self.jack_tokenizer.advance()
# the curr token : return type of the subroutine
if self.jack_tokenizer.token_type() == KEYWORD:
self.return_type = self.jack_tokenizer.key_word()
else:
self.return_type = self.jack_tokenizer.identifier()
self.jack_tokenizer.has_more_tokens()
self.jack_tokenizer.advance()
self.subroutine_name = self.jack_tokenizer.identifier()
while self.jack_tokenizer.has_more_tokens():
self.jack_tokenizer.advance()
if self.jack_tokenizer.symbol() == "(":
if type_of_subroutine == "method":
self.symbol_table.define(THIS, self.class_name, ARG)
self.compile_parameter_list()
# the curr token should be - ")"
if self.jack_tokenizer.symbol() == '{':
while self.jack_tokenizer.has_more_tokens():
self.jack_tokenizer.advance()
token_type = self.jack_tokenizer.token_type()
if token_type == KEYWORD:
if self.jack_tokenizer.key_word() == "var":
self.compile_var_dec()
continue
else:
self.writer.write_function(self.class_name +
"." + self.subroutine_name, self.symbol_table.var_count(VAR))
if type_of_subroutine == "constructor":
self.writer.write_push(CONST, self.symbol_table.var_count(FIELD))
self.writer.write_call("Memory.alloc", 1)
self.writer.write_pop("pointer", 0)
elif type_of_subroutine == "method":
#.........这里部分代码省略.........