三、属性翻译文法
变量声明（declaration）
<VarDeclaration> ::= <Type>↑var_type,var_size<Idetifier>↑id_name
@varDeclaration↓var_type,var_size,id_name
@varAllocation↓var_size
<Type> ↑var_type,var_size ::= <ArrayType>↑var_type,var_size
|<BooleanType>↑var_type,var_size
|<IntegerType>↑var_type,var_size
|<Identifier>↑var_type,var_size
变量赋值（assignment）
<AssignmentStatement> ::= <Identifier>↑id_name,id_type
“=”
<Expression>↑exp_type,exp_value
“;”
@checkType↓id_type,exp_type
@insertIntoTable↓id_name,id_type.exp_value
<Expression>↑exp_type,exp_value ::= <AndExpression>↑exp_type,exp_value
|<CompareExpression>↑exp_type,exp_value
|<PlusExpression>↑exp_type,exp_value
|<MinusExpression>↑exp_type,exp_value
|<TimesExpression>↑exp_type,exp_value
|<ArrayLookup>↑exp_type,exp_value
|<ArrayLength>↑exp_type,exp_value
|<MessageSend>↑exp_type,exp_value
|<PrimaryExpression>↑exp_type,exp_value
<PrimaryExpression>↑exp_type,exp_value ::= <IntegerLiteral>↑exp_type,exp_value
|<TrueLiteral>↑exp_type,exp_value
|<FalseLiteral>↑exp_type,exp_value
|<Identifier>↑exp_type,exp_value
|<Expression>↑exp_type,exp_value
|<ArrayAllocationExpression>↑exp_type,exp_value
|<AllocationExpression>↑exp_type,exp_value
|<NotExpression>↑exp_type,exp_value
|<BracketExpression>↑exp_type,exp_value
（待续）
