//语句开始
private void statement()
{
ReturnsType = _ReturnsType.none;
count = 0;
int line = 0;
bool flag=true;
errortype = 0;
while (strArray[count] != "end")
{
if (settype(strArray[count]) == wordtype.create)
{
line++;
count++;
if (!state_c())
{
/*错误处理函数添加于此*/
string error;
error = derror(line,errortype);
fun(error);
count = strArray.Length - 1;
flag = false;
}//错误处理
}
if (settype(strArray[count]) == wordtype.alter)
{
line++;
count++;
if (!state_a())
{
/*错误处理函数添加于此*/
string error;
error = derror(line,errortype);
fun(error);
count = strArray.Length - 1;
flag = false;
}//错误处理
}
if (settype(strArray[count]) == wordtype.select)
{
line++;
count++;
if (!state_s())
{
/*错误处理函数添加于此*/
string error;
error = derror(line, errortype);
fun(error);
count = strArray.Length - 1;
flag = false;
}//错误处理
}
}
if (flag == true)
{
string result;
result = "成功执行";
fun(result);
}
}
//select type语句
private bool selecttype()
{
string key="";
object val=null;
count++;
_returns = new HashSet<IType>();
ReturnsType = _ReturnsType.Type;
if (strArray[count] == "(")
{
if (strArray[count + 2] == ":")
{
if (typekey_val(ref key, ref val))
{
IType t = gHelper.SelectSingleTypeName(val.ToString());
return true;
}
else
return false;
}
if (strArray[count + 2] == "," || strArray[count + 2] == ")")
{
Dictionary<string,object> key_val=new Dictionary<string,object>();
if (tkey_list(key_val))
{
IEnumerable<IType> ts = Graph.Types;
foreach( var v in key_val.Keys)
{
ts = gHelper.SelectTypes(v, null, null , ts);
}
return true;
}
else
return false;
}
return false;
}
else
return false;
}
//select vertex语句
private bool selectvertex(string varvertex)
{
_returns = new HashSet<IVertex>();
ReturnsType = _ReturnsType.Vertex;
string v1typename="";
object v1typeval=null;
Dictionary<string,object> v1key_val =new Dictionary<string,object>();
if (verter_type_keyval(ref v1typename, ref v1typeval, v1key_val))
{
if (strArray[count] == "match")
{
count++;
IEnumerable<IVertex> vs = null;
if ((vs = getvertexs(vs, v1typename, v1typeval, v1key_val)) == null)
return false;
if (selectmatch(vs,varvertex))
return true;
else
return false;
}
if (strArray[count] == ".")
{
count++;
IEnumerable<IVertex> vs = null;
if ((vs = getvertexs(vs, v1typename, v1typeval, v1key_val)) == null)
return false;
_returns = vs;
return true;
}
return false;
}
else
return false;
}
//select edge语句
private bool selectedge()
{
string v1type="",v2type="";
object v1typeval=null,v2typeval=null;
Dictionary<string, object> v1 = new Dictionary<string, object>();
Dictionary<string, object> v2 = new Dictionary<string, object>();
Dictionary<string, object> con = new Dictionary<string, object>();
wordtype[] lo=new wordtype[5];
count++;
_returns = new HashSet<Edge>();
ReturnsType = _ReturnsType.Edge;
if (strArray[count] == "(")
{
count++;
if (verter_type_keyval(ref v1type, ref v1typeval, v1))
{
if (strArray[count] == ",")
{
count++;
if (verter_type_keyval(ref v2type, ref v2typeval, v2))
{
IEnumerable<IVertex> v1s = new HashSet<IVertex>();
IEnumerable<IVertex> v2s = new HashSet<IVertex>();
if ((v1s=getvertexs(v1s, v1type, v1typeval, v1))!=null && (v2s=getvertexs(v2s, v2type, v2typeval, v2))!=null)
{
if (strArray[count] == ",")
{
count++;
if(econdition(con,lo))
{
foreach (var vsrc in v1s)
{
foreach (var vdest in v2s)
{
IEnumerable<IEdge> es = gHelper.SelectParallelEdges(vsrc, vdest);
getedges(es, vsrc, vdest, con, lo);
_returns = _returns.Concat(es);
}
}
}
else
return false;
}
else
{
foreach (var vsrc in v1s)
{
foreach (var vdest in v2s)
{
IEnumerable<IEdge> es = gHelper.SelectEdges(null, null, vsrc, vdest);
_returns = _returns.Concat(es);
}
}
}
if (strArray[count] == ")")
{
count++;
return true;
}
else
return false;
}
else
return false;
}
else
return false;
}
else
return false;
}
else
return false;
}
else
return false;
}
