public object Run(AST root)
{
// 跳过Import
while (root != null && root is ImportStmt)
{
root = root.SiblingAST;
}
List <Field> fields = new List <Field>();
List <Method> methods = new List <Method>();
// 第二轮生成类方法和域的声明
List <Class> .Enumerator classesEnumerator = Classes.GetEnumerator();
while (root != null)
{
ClassStmt classStmt = (ClassStmt)root;
classesEnumerator.MoveNext();
Class currentClass = classesEnumerator.Current;
VarStmt varStmt = classStmt.Fields;
while (varStmt != null)
{
fields.Add(Constructor.AddClassField(currentClass, varStmt.Id, varStmt.Type.ToXirType(Constructor), varStmt.AccessFlag));
varStmt = (VarStmt)varStmt.SiblingAST;
}
FuncStmt funcStmt = classStmt.Methods;
while (funcStmt != null)
{
List <VariableType> pTypes = new List <VariableType>();
VarStmt param = funcStmt.Params.Params;
while (param != null)
{
pTypes.Add(param.Type.ToXirType(Constructor));
param = (VarStmt)param.SiblingAST;
}
VariableType retType = funcStmt.Type.ToXirType(Constructor);
if (funcStmt.Id == "(init)")
{
// AST上缺少了函数名，检查是否符合构造函数条件
if (retType is ObjectType objectType &&
objectType.ClassName == currentClass.Name && objectType.ModuleName == currentClass.Parent.Name)
{
// 确实是构造函数，返回值改为void
methods.Add(Constructor.AddMethod(currentClass, funcStmt.Id,
null, pTypes, funcStmt.AccessFlag));
}
else
{
throw new XiLangError("Missing return type or mis-spelled constructor");
}
}
public ParamsAst(VarStmt ps)
{
Params = ps;
}