添加一些语法
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128
node_declear.py
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128
node_declear.py
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from lex_c import lex_token
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import lex_c
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from parser_c import node
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from parser_c import node_file
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from parser_c import node_variable_def
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from parser_c import node_struct_decl
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from parser_c import node_struct_def
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from parser_c import node_union_decl
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from parser_c import node_union_def
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from parser_c import node_enum_decl
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from parser_c import node_enum_def
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from parser_c import node_func_decl
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from parser_c import node_typedef
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from parser_c import node_func_def
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from parser_c import find_sentence
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from parser_c import dist_node_type
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from parser_c import find_close
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def dist_node_type_struct(token_list:list[lex_token]):
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if(token_list[0].token==lex_c.TOKEN_STRUCT):
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if(token_list[1].token==lex_c.TOKEN_SYMBOL):
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if(len(token_list)==2):
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return node_struct_decl(name=token_list[1].buff.decode("utf-8"),token_list=token_list)
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elif(token_list[2].token==lex_c.TOKEN("{")):
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if not token_list[-1].token==lex_c.TOKEN("}"):
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raise Exception("没有出现预期的符号 '}'")
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v_list:list[node_variable_def]=[]
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token_list_local=token_list[3:-1]
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while len(token_list_local)>0:
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sentence=find_sentence(token_list_local)
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v_list.append(dist_node_type(token_list=sentence))
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token_list_local=token_list_local[len(sentence):]
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return node_struct_def(name=token_list[1].buff.decode("utf-8"),token_list=token_list,body=v_list)
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raise Exception(f"语法错误 {token_list[0]}")
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def dist_node_type_union(token_list:list[lex_token]):
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if(token_list[0].token==lex_c.TOKEN_UNION):
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if(token_list[1].token==lex_c.TOKEN_SYMBOL):
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if(len(token_list)==2):
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return node_union_decl(name=token_list[1].buff.decode("utf-8"),token_list=token_list)
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elif(token_list[2].token==lex_c.TOKEN("{")):
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if not token_list[-1].token==lex_c.TOKEN("}"):
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raise Exception("没有出现预期的符号 '}'")
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v_list:list[node_variable_def]=[]
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token_list_local=token_list[3:-1]
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while len(token_list_local)>0:
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sentence=find_sentence(token_list_local)
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v_list.append(dist_node_type(token_list=sentence))
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token_list_local=token_list_local[len(sentence):]
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return node_union_def(name=token_list[1].buff.decode("utf-8"),token_list=token_list,body=v_list)
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raise Exception(f"语法错误 {token_list[0]}")
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def dist_node_type_enum(token_list:list[lex_token]):
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if(token_list[0].token==lex_c.TOKEN_ENUM):
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if(token_list[1].token==lex_c.TOKEN_SYMBOL):
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if(len(token_list)==2):
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return node_enum_decl(name=token_list[1].buff.decode("utf-8"),token_list=token_list)
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elif(token_list[2].token==lex_c.TOKEN("{")):
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if not token_list[-1].token==lex_c.TOKEN("}"):
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raise Exception("没有出现预期的符号 '}'")
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token_list_local=token_list[3:-1]
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index=0
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v_list:list[dict]=[]
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while len(token_list_local)>0:
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if(token_list_local[0].token==lex_c.TOKEN_SYMBOL):
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key=token_list_local[0].buff.decode("utf-8")
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if(token_list_local[1].token==lex_c.TOKEN("=") and token_list_local[2].token==lex_c.TOKEN_NUM):
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index=int(token_list_local[2].buff.decode("utf-8"))
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token_list_local=token_list_local[3:]
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else:
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index+=1
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token_list_local=token_list_local[1:]
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v_list.append({key:index})
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if(len(token_list_local)>0):
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if(token_list_local[0].token!=lex_c.TOKEN(",")):
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raise Exception(f"枚举类型应该使用 ',' 分隔符")
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token_list_local=token_list_local[1:]
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return node_enum_def(name=token_list[1].buff.decode("utf-8"),token_list=token_list,body=v_list)
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raise Exception(f"语法错误 {token_list[0]}")
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def dist_node_type_typedef(token_list:list[lex_token]):
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if(token_list[0].token==lex_c.TOKEN_TYPEDEF):
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attr=[]
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token_list_local=token_list
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if(token_list[-1].token!=lex_c.TOKEN_SYMBOL):
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raise Exception(f"没有定义新类型 {token_list[-1]}")
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name=token_list[-1].buff.decode("utf-8")
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token_list=token_list[1:]
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while token_list[0].token in [lex_c.TOKEN_UNSIGNED,lex_c.TOKEN_CONST]:
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attr.append(token_list[0].name)
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token_list=token_list[1:]
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if(token_list[0].token==lex_c.TOKEN_STRUCT or token_list[0].token==lex_c.TOKEN_UNION):
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attr.append(token_list[0].name)
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if(token_list[1].token==lex_c.TOKEN_SYMBOL):
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node_r=None
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attr.append(token_list[1].buff.decode("utf-8"))
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if(token_list[2].token==lex_c.TOKEN("{")):
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node_r=dist_node_type(token_list=token_list[1:-1])
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elif(token_list[2].token==lex_c.TOKEN("*")):
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attr.append(token_list[2].name)
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return node_typedef(name=name,token_list=token_list_local,attr=attr,body=node_r)
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if(token_list[0].token==lex_c.TOKEN_SYMBOL):
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# 使用typedef 定义过的自定义类型
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attr.append(token_list[0].buff.decode("utf-8"))
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token_list=token_list[1:]
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else:
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# c语言预设类型
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while(token_list[0].token in
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[lex_c.TOKEN_INT,lex_c.TOKEN_CHAR,lex_c.TOKEN_SHORT,lex_c.TOKEN_LONG,lex_c.TOKEN_FLOAT,
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lex_c.TOKEN_DOUBLE,lex_c.TOKEN_VOID,lex_c.TOKEN("*")]):
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attr.append(token_list[0].name)
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token_list=token_list[1:]
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if(len(token_list)>1):
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raise Exception(f"意外的token {token_list[0]}")
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return node_typedef(name=name,token_list=token_list_local,attr=attr,body=None)
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raise Exception(f"语法错误 {token_list[0]}")
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