Add object type, dot operator can return function references

test/tests/object simple.lua

@@ -0,0 +1,98 @@
+local _={}
+_[41]={}
+_[40]={}
+_[39]={}
+_[38]={}
+_[37]={}
+_[36]={}
+_[35]={}
+_[34]={}
+_[33]={}
+_[32]={}
+_[31]={}
+_[30]={}
+_[29]={}
+_[28]={}
+_[27]={}
+_[26]={}
+_[25]={tags=_[41],text="bar"}
+_[24]={tags=_[40],text=" == "}
+_[23]={tags=_[39],text="bar"}
+_[22]={tags=_[38],text="foo"}
+_[21]={tags=_[37],text=" != "}
+_[20]={tags=_[36],text="haha"}
+_[19]={tags=_[35],text="foo"}
+_[18]={tags=_[34],text=" != "}
+_[17]={tags=_[33],text="haha"}
+_[16]={tags=_[32],text="foo"}
+_[15]={tags=_[31],text=" == "}
+_[14]={tags=_[30],text="foo"}
+_[13]={tags=_[29],text="foo"}
+_[12]={tags=_[28],text=" == "}
+_[11]={tags=_[27],text="foo"}
+_[10]={tags=_[26],text="%object simple.class::&object simple.class"}
+_[9]={_[23],_[24],_[25]}
+_[8]={_[17],_[18],_[19],_[20],_[21],_[22]}
+_[7]={_[11],_[12],_[13],_[14],_[15],_[16]}
+_[6]={_[10]}
+_[5]={"return"}
+_[4]={"text",_[9]}
+_[3]={"text",_[8]}
+_[2]={"text",_[7]}
+_[1]={"text",_[6]}
+return {_[1],_[2],_[3],_[4],_[5]}
+--[[
+{ "text", { {
+      tags = {},
+      text = "%object simple.class::&object simple.class"
+    } } }
+{ "text", { {
+      tags = {},
+      text = "foo"
+    }, {
+      tags = {},
+      text = " == "
+    }, {
+      tags = {},
+      text = "foo"
+    }, {
+      tags = {},
+      text = "foo"
+    }, {
+      tags = {},
+      text = " == "
+    }, {
+      tags = {},
+      text = "foo"
+    } } }
+{ "text", { {
+      tags = {},
+      text = "haha"
+    }, {
+      tags = {},
+      text = " != "
+    }, {
+      tags = {},
+      text = "foo"
+    }, {
+      tags = {},
+      text = "haha"
+    }, {
+      tags = {},
+      text = " != "
+    }, {
+      tags = {},
+      text = "foo"
+    } } }
+{ "text", { {
+      tags = {},
+      text = "bar"
+    }, {
+      tags = {},
+      text = " == "
+    }, {
+      tags = {},
+      text = "bar"
+    } } }
+{ "return" }
+]]--