Support optional properties and object literal type (#6)

antlr/YorkieSchema.g4

@@ -43,6 +43,7 @@ primaryType
     | objectType
     | yorkieType
     | typeReference
+    | literal
     ;
 
 primitiveType
@@ -60,7 +61,7 @@ objectType
     ;
 
 propertySignature
-    : propertyName typeAnnotation ';'
+    : propertyName '?'? typeAnnotation ';'
     ;
 
 propertyName
@@ -70,11 +71,11 @@ propertyName
 
 // Yorkie specific types
 yorkieType
-    : 'yorkie.Object'
-    | 'yorkie.Array'
-    | 'yorkie.Counter'
-    | 'yorkie.Text'
-    | 'yorkie.Tree'
+    : 'yorkie.Object' typeArguments
+    | 'yorkie.Array' typeArguments
+    | 'yorkie.Counter' typeArguments?
+    | 'yorkie.Text' typeArguments?
+    | 'yorkie.Tree' typeArguments?
     ;
 
 typeReference

antlr/YorkieSchema.interp

@@ -18,6 +18,7 @@ null
 'undefined'
 '{'
 '}'
+'?'
 'yorkie.Object'
 'yorkie.Array'
 'yorkie.Counter'
@@ -68,6 +69,7 @@ null
 null
 null
 null
+null
 Identifier
 StringLiteral
 NumberLiteral
@@ -102,4 +104,4 @@ literal
 
 
 atn:
-[3, 51485, 51898, 1421, 44986, 20307, 1543, 60043, 49729, 3, 38, 175, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 4, 8, 9, 8, 4, 9, 9, 9, 4, 10, 9, 10, 4, 11, 9, 11, 4, 12, 9, 12, 4, 13, 9, 13, 4, 14, 9, 14, 4, 15, 9, 15, 4, 16, 9, 16, 4, 17, 9, 17, 4, 18, 9, 18, 4, 19, 9, 19, 4, 20, 9, 20, 4, 21, 9, 21, 4, 22, 9, 22, 4, 23, 9, 23, 3, 2, 7, 2, 48, 10, 2, 12, 2, 14, 2, 51, 11, 2, 3, 2, 3, 2, 3, 3, 3, 3, 5, 3, 57, 10, 3, 3, 4, 3, 4, 3, 4, 5, 4, 62, 10, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 5, 3, 5, 3, 5, 5, 5, 71, 10, 5, 3, 5, 3, 5, 5, 5, 75, 10, 5, 3, 5, 3, 5, 3, 6, 3, 6, 3, 6, 3, 7, 3, 7, 3, 8, 3, 8, 3, 8, 7, 8, 87, 10, 8, 12, 8, 14, 8, 90, 11, 8, 3, 9, 3, 9, 3, 9, 7, 9, 95, 10, 9, 12, 9, 14, 9, 98, 11, 9, 3, 10, 3, 10, 3, 10, 7, 10, 103, 10, 10, 12, 10, 14, 10, 106, 11, 10, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 5, 11, 113, 10, 11, 3, 12, 3, 12, 3, 13, 3, 13, 7, 13, 119, 10, 13, 12, 13, 14, 13, 122, 11, 13, 3, 13, 3, 13, 3, 14, 3, 14, 3, 14, 3, 14, 3, 15, 3, 15, 3, 16, 3, 16, 3, 17, 3, 17, 5, 17, 136, 10, 17, 3, 18, 3, 18, 3, 18, 3, 18, 3, 19, 3, 19, 3, 19, 3, 19, 7, 19, 146, 10, 19, 12, 19, 14, 19, 149, 11, 19, 3, 19, 3, 19, 3, 20, 3, 20, 3, 20, 5, 20, 156, 10, 20, 3, 21, 3, 21, 3, 21, 3, 21, 7, 21, 162, 10, 21, 12, 21, 14, 21, 165, 11, 21, 3, 21, 3, 21, 3, 22, 3, 22, 5, 22, 171, 10, 22, 3, 23, 3, 23, 3, 23, 2, 2, 2, 24, 2, 2, 4, 2, 6, 2, 8, 2, 10, 2, 12, 2, 14, 2, 16, 2, 18, 2, 20, 2, 22, 2, 24, 2, 26, 2, 28, 2, 30, 2, 32, 2, 34, 2, 36, 2, 38, 2, 40, 2, 42, 2, 44, 2, 2, 6, 3, 2, 12, 18, 3, 2, 32, 33, 3, 2, 21, 25, 3, 2, 33, 35, 2, 170, 2, 49, 3, 2, 2, 2, 4, 56, 3, 2, 2, 2, 6, 58, 3, 2, 2, 2, 8, 67, 3, 2, 2, 2, 10, 78, 3, 2, 2, 2, 12, 81, 3, 2, 2, 2, 14, 83, 3, 2, 2, 2, 16, 91, 3, 2, 2, 2, 18, 99, 3, 2, 2, 2, 20, 112, 3, 2, 2, 2, 22, 114, 3, 2, 2, 2, 24, 116, 3, 2, 2, 2, 26, 125, 3, 2, 2, 2, 28, 129, 3, 2, 2, 2, 30, 131, 3, 2, 2, 2, 32, 133, 3, 2, 2, 2, 34, 137, 3, 2, 2, 2, 36, 141, 3, 2, 2, 2, 38, 152, 3, 2, 2, 2, 40, 157, 3, 2, 2, 2, 42, 170, 3, 2, 2, 2, 44, 172, 3, 2, 2, 2, 46, 48, 5, 4, 3, 2, 47, 46, 3, 2, 2, 2, 48, 51, 3, 2, 2, 2, 49, 47, 3, 2, 2, 2, 49, 50, 3, 2, 2, 2, 50, 52, 3, 2, 2, 2, 51, 49, 3, 2, 2, 2, 52, 53, 7, 2, 2, 3, 53, 3, 3, 2, 2, 2, 54, 57, 5, 6, 4, 2, 55, 57, 5, 8, 5, 2, 56, 54, 3, 2, 2, 2, 56, 55, 3, 2, 2, 2, 57, 5, 3, 2, 2, 2, 58, 59, 7, 3, 2, 2, 59, 61, 7, 32, 2, 2, 60, 62, 5, 36, 19, 2, 61, 60, 3, 2, 2, 2, 61, 62, 3, 2, 2, 2, 62, 63, 3, 2, 2, 2, 63, 64, 7, 4, 2, 2, 64, 65, 5, 12, 7, 2, 65, 66, 7, 5, 2, 2, 66, 7, 3, 2, 2, 2, 67, 68, 7, 6, 2, 2, 68, 70, 7, 32, 2, 2, 69, 71, 5, 10, 6, 2, 70, 69, 3, 2, 2, 2, 70, 71, 3, 2, 2, 2, 71, 74, 3, 2, 2, 2, 72, 73, 7, 4, 2, 2, 73, 75, 5, 42, 22, 2, 74, 72, 3, 2, 2, 2, 74, 75, 3, 2, 2, 2, 75, 76, 3, 2, 2, 2, 76, 77, 7, 5, 2, 2, 77, 9, 3, 2, 2, 2, 78, 79, 7, 7, 2, 2, 79, 80, 5, 12, 7, 2, 80, 11, 3, 2, 2, 2, 81, 82, 5, 14, 8, 2, 82, 13, 3, 2, 2, 2, 83, 88, 5, 16, 9, 2, 84, 85, 7, 8, 2, 2, 85, 87, 5, 16, 9, 2, 86, 84, 3, 2, 2, 2, 87, 90, 3, 2, 2, 2, 88, 86, 3, 2, 2, 2, 88, 89, 3, 2, 2, 2, 89, 15, 3, 2, 2, 2, 90, 88, 3, 2, 2, 2, 91, 96, 5, 18, 10, 2, 92, 93, 7, 9, 2, 2, 93, 95, 5, 18, 10, 2, 94, 92, 3, 2, 2, 2, 95, 98, 3, 2, 2, 2, 96, 94, 3, 2, 2, 2, 96, 97, 3, 2, 2, 2, 97, 17, 3, 2, 2, 2, 98, 96, 3, 2, 2, 2, 99, 104, 5, 20, 11, 2, 100, 101, 7, 10, 2, 2, 101, 103, 7, 11, 2, 2, 102, 100, 3, 2, 2, 2, 103, 106, 3, 2, 2, 2, 104, 102, 3, 2, 2, 2, 104, 105, 3, 2, 2, 2, 105, 19, 3, 2, 2, 2, 106, 104, 3, 2, 2, 2, 107, 113, 5, 34, 18, 2, 108, 113, 5, 22, 12, 2, 109, 113, 5, 24, 13, 2, 110, 113, 5, 30, 16, 2, 111, 113, 5, 32, 17, 2, 112, 107, 3, 2, 2, 2, 112, 108, 3, 2, 2, 2, 112, 109, 3, 2, 2, 2, 112, 110, 3, 2, 2, 2, 112, 111, 3, 2, 2, 2, 113, 21, 3, 2, 2, 2, 114, 115, 9, 2, 2, 2, 115, 23, 3, 2, 2, 2, 116, 120, 7, 19, 2, 2, 117, 119, 5, 26, 14, 2, 118, 117, 3, 2, 2, 2, 119, 122, 3, 2, 2, 2, 120, 118, 3, 2, 2, 2, 120, 121, 3, 2, 2, 2, 121, 123, 3, 2, 2, 2, 122, 120, 3, 2, 2, 2, 123, 124, 7, 20, 2, 2, 124, 25, 3, 2, 2, 2, 125, 126, 5, 28, 15, 2, 126, 127, 5, 10, 6, 2, 127, 128, 7, 5, 2, 2, 128, 27, 3, 2, 2, 2, 129, 130, 9, 3, 2, 2, 130, 29, 3, 2, 2, 2, 131, 132, 9, 4, 2, 2, 132, 31, 3, 2, 2, 2, 133, 135, 7, 32, 2, 2, 134, 136, 5, 40, 21, 2, 135, 134, 3, 2, 2, 2, 135, 136, 3, 2, 2, 2, 136, 33, 3, 2, 2, 2, 137, 138, 7, 26, 2, 2, 138, 139, 5, 12, 7, 2, 139, 140, 7, 27, 2, 2, 140, 35, 3, 2, 2, 2, 141, 142, 7, 28, 2, 2, 142, 147, 5, 38, 20, 2, 143, 144, 7, 29, 2, 2, 144, 146, 5, 38, 20, 2, 145, 143, 3, 2, 2, 2, 146, 149, 3, 2, 2, 2, 147, 145, 3, 2, 2, 2, 147, 148, 3, 2, 2, 2, 148, 150, 3, 2, 2, 2, 149, 147, 3, 2, 2, 2, 150, 151, 7, 30, 2, 2, 151, 37, 3, 2, 2, 2, 152, 155, 7, 32, 2, 2, 153, 154, 7, 31, 2, 2, 154, 156, 5, 12, 7, 2, 155, 153, 3, 2, 2, 2, 155, 156, 3, 2, 2, 2, 156, 39, 3, 2, 2, 2, 157, 158, 7, 28, 2, 2, 158, 163, 5, 12, 7, 2, 159, 160, 7, 29, 2, 2, 160, 162, 5, 12, 7, 2, 161, 159, 3, 2, 2, 2, 162, 165, 3, 2, 2, 2, 163, 161, 3, 2, 2, 2, 163, 164, 3, 2, 2, 2, 164, 166, 3, 2, 2, 2, 165, 163, 3, 2, 2, 2, 166, 167, 7, 30, 2, 2, 167, 41, 3, 2, 2, 2, 168, 171, 7, 32, 2, 2, 169, 171, 5, 44, 23, 2, 170, 168, 3, 2, 2, 2, 170, 169, 3, 2, 2, 2, 171, 43, 3, 2, 2, 2, 172, 173, 9, 5, 2, 2, 173, 45, 3, 2, 2, 2, 17, 49, 56, 61, 70, 74, 88, 96, 104, 112, 120, 135, 147, 155, 163, 170]
+[3, 51485, 51898, 1421, 44986, 20307, 1543, 60043, 49729, 3, 39, 195, 4, 2, 9, 2, 4, 3, 9, 3, 4, 4, 9, 4, 4, 5, 9, 5, 4, 6, 9, 6, 4, 7, 9, 7, 4, 8, 9, 8, 4, 9, 9, 9, 4, 10, 9, 10, 4, 11, 9, 11, 4, 12, 9, 12, 4, 13, 9, 13, 4, 14, 9, 14, 4, 15, 9, 15, 4, 16, 9, 16, 4, 17, 9, 17, 4, 18, 9, 18, 4, 19, 9, 19, 4, 20, 9, 20, 4, 21, 9, 21, 4, 22, 9, 22, 4, 23, 9, 23, 3, 2, 7, 2, 48, 10, 2, 12, 2, 14, 2, 51, 11, 2, 3, 2, 3, 2, 3, 3, 3, 3, 5, 3, 57, 10, 3, 3, 4, 3, 4, 3, 4, 5, 4, 62, 10, 4, 3, 4, 3, 4, 3, 4, 3, 4, 3, 5, 3, 5, 3, 5, 5, 5, 71, 10, 5, 3, 5, 3, 5, 5, 5, 75, 10, 5, 3, 5, 3, 5, 3, 6, 3, 6, 3, 6, 3, 7, 3, 7, 3, 8, 3, 8, 3, 8, 7, 8, 87, 10, 8, 12, 8, 14, 8, 90, 11, 8, 3, 9, 3, 9, 3, 9, 7, 9, 95, 10, 9, 12, 9, 14, 9, 98, 11, 9, 3, 10, 3, 10, 3, 10, 7, 10, 103, 10, 10, 12, 10, 14, 10, 106, 11, 10, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 3, 11, 5, 11, 114, 10, 11, 3, 12, 3, 12, 3, 13, 3, 13, 7, 13, 120, 10, 13, 12, 13, 14, 13, 123, 11, 13, 3, 13, 3, 13, 3, 14, 3, 14, 5, 14, 129, 10, 14, 3, 14, 3, 14, 3, 14, 3, 15, 3, 15, 3, 16, 3, 16, 3, 16, 3, 16, 3, 16, 3, 16, 5, 16, 142, 10, 16, 3, 16, 3, 16, 5, 16, 146, 10, 16, 3, 16, 3, 16, 5, 16, 150, 10, 16, 5, 16, 152, 10, 16, 3, 17, 3, 17, 5, 17, 156, 10, 17, 3, 18, 3, 18, 3, 18, 3, 18, 3, 19, 3, 19, 3, 19, 3, 19, 7, 19, 166, 10, 19, 12, 19, 14, 19, 169, 11, 19, 3, 19, 3, 19, 3, 20, 3, 20, 3, 20, 5, 20, 176, 10, 20, 3, 21, 3, 21, 3, 21, 3, 21, 7, 21, 182, 10, 21, 12, 21, 14, 21, 185, 11, 21, 3, 21, 3, 21, 3, 22, 3, 22, 5, 22, 191, 10, 22, 3, 23, 3, 23, 3, 23, 2, 2, 2, 24, 2, 2, 4, 2, 6, 2, 8, 2, 10, 2, 12, 2, 14, 2, 16, 2, 18, 2, 20, 2, 22, 2, 24, 2, 26, 2, 28, 2, 30, 2, 32, 2, 34, 2, 36, 2, 38, 2, 40, 2, 42, 2, 44, 2, 2, 5, 3, 2, 12, 18, 3, 2, 33, 34, 3, 2, 34, 36, 2, 199, 2, 49, 3, 2, 2, 2, 4, 56, 3, 2, 2, 2, 6, 58, 3, 2, 2, 2, 8, 67, 3, 2, 2, 2, 10, 78, 3, 2, 2, 2, 12, 81, 3, 2, 2, 2, 14, 83, 3, 2, 2, 2, 16, 91, 3, 2, 2, 2, 18, 99, 3, 2, 2, 2, 20, 113, 3, 2, 2, 2, 22, 115, 3, 2, 2, 2, 24, 117, 3, 2, 2, 2, 26, 126, 3, 2, 2, 2, 28, 133, 3, 2, 2, 2, 30, 151, 3, 2, 2, 2, 32, 153, 3, 2, 2, 2, 34, 157, 3, 2, 2, 2, 36, 161, 3, 2, 2, 2, 38, 172, 3, 2, 2, 2, 40, 177, 3, 2, 2, 2, 42, 190, 3, 2, 2, 2, 44, 192, 3, 2, 2, 2, 46, 48, 5, 4, 3, 2, 47, 46, 3, 2, 2, 2, 48, 51, 3, 2, 2, 2, 49, 47, 3, 2, 2, 2, 49, 50, 3, 2, 2, 2, 50, 52, 3, 2, 2, 2, 51, 49, 3, 2, 2, 2, 52, 53, 7, 2, 2, 3, 53, 3, 3, 2, 2, 2, 54, 57, 5, 6, 4, 2, 55, 57, 5, 8, 5, 2, 56, 54, 3, 2, 2, 2, 56, 55, 3, 2, 2, 2, 57, 5, 3, 2, 2, 2, 58, 59, 7, 3, 2, 2, 59, 61, 7, 33, 2, 2, 60, 62, 5, 36, 19, 2, 61, 60, 3, 2, 2, 2, 61, 62, 3, 2, 2, 2, 62, 63, 3, 2, 2, 2, 63, 64, 7, 4, 2, 2, 64, 65, 5, 12, 7, 2, 65, 66, 7, 5, 2, 2, 66, 7, 3, 2, 2, 2, 67, 68, 7, 6, 2, 2, 68, 70, 7, 33, 2, 2, 69, 71, 5, 10, 6, 2, 70, 69, 3, 2, 2, 2, 70, 71, 3, 2, 2, 2, 71, 74, 3, 2, 2, 2, 72, 73, 7, 4, 2, 2, 73, 75, 5, 42, 22, 2, 74, 72, 3, 2, 2, 2, 74, 75, 3, 2, 2, 2, 75, 76, 3, 2, 2, 2, 76, 77, 7, 5, 2, 2, 77, 9, 3, 2, 2, 2, 78, 79, 7, 7, 2, 2, 79, 80, 5, 12, 7, 2, 80, 11, 3, 2, 2, 2, 81, 82, 5, 14, 8, 2, 82, 13, 3, 2, 2, 2, 83, 88, 5, 16, 9, 2, 84, 85, 7, 8, 2, 2, 85, 87, 5, 16, 9, 2, 86, 84, 3, 2, 2, 2, 87, 90, 3, 2, 2, 2, 88, 86, 3, 2, 2, 2, 88, 89, 3, 2, 2, 2, 89, 15, 3, 2, 2, 2, 90, 88, 3, 2, 2, 2, 91, 96, 5, 18, 10, 2, 92, 93, 7, 9, 2, 2, 93, 95, 5, 18, 10, 2, 94, 92, 3, 2, 2, 2, 95, 98, 3, 2, 2, 2, 96, 94, 3, 2, 2, 2, 96, 97, 3, 2, 2, 2, 97, 17, 3, 2, 2, 2, 98, 96, 3, 2, 2, 2, 99, 104, 5, 20, 11, 2, 100, 101, 7, 10, 2, 2, 101, 103, 7, 11, 2, 2, 102, 100, 3, 2, 2, 2, 103, 106, 3, 2, 2, 2, 104, 102, 3, 2, 2, 2, 104, 105, 3, 2, 2, 2, 105, 19, 3, 2, 2, 2, 106, 104, 3, 2, 2, 2, 107, 114, 5, 34, 18, 2, 108, 114, 5, 22, 12, 2, 109, 114, 5, 24, 13, 2, 110, 114, 5, 30, 16, 2, 111, 114, 5, 32, 17, 2, 112, 114, 5, 44, 23, 2, 113, 107, 3, 2, 2, 2, 113, 108, 3, 2, 2, 2, 113, 109, 3, 2, 2, 2, 113, 110, 3, 2, 2, 2, 113, 111, 3, 2, 2, 2, 113, 112, 3, 2, 2, 2, 114, 21, 3, 2, 2, 2, 115, 116, 9, 2, 2, 2, 116, 23, 3, 2, 2, 2, 117, 121, 7, 19, 2, 2, 118, 120, 5, 26, 14, 2, 119, 118, 3, 2, 2, 2, 120, 123, 3, 2, 2, 2, 121, 119, 3, 2, 2, 2, 121, 122, 3, 2, 2, 2, 122, 124, 3, 2, 2, 2, 123, 121, 3, 2, 2, 2, 124, 125, 7, 20, 2, 2, 125, 25, 3, 2, 2, 2, 126, 128, 5, 28, 15, 2, 127, 129, 7, 21, 2, 2, 128, 127, 3, 2, 2, 2, 128, 129, 3, 2, 2, 2, 129, 130, 3, 2, 2, 2, 130, 131, 5, 10, 6, 2, 131, 132, 7, 5, 2, 2, 132, 27, 3, 2, 2, 2, 133, 134, 9, 3, 2, 2, 134, 29, 3, 2, 2, 2, 135, 136, 7, 22, 2, 2, 136, 152, 5, 40, 21, 2, 137, 138, 7, 23, 2, 2, 138, 152, 5, 40, 21, 2, 139, 141, 7, 24, 2, 2, 140, 142, 5, 40, 21, 2, 141, 140, 3, 2, 2, 2, 141, 142, 3, 2, 2, 2, 142, 152, 3, 2, 2, 2, 143, 145, 7, 25, 2, 2, 144, 146, 5, 40, 21, 2, 145, 144, 3, 2, 2, 2, 145, 146, 3, 2, 2, 2, 146, 152, 3, 2, 2, 2, 147, 149, 7, 26, 2, 2, 148, 150, 5, 40, 21, 2, 149, 148, 3, 2, 2, 2, 149, 150, 3, 2, 2, 2, 150, 152, 3, 2, 2, 2, 151, 135, 3, 2, 2, 2, 151, 137, 3, 2, 2, 2, 151, 139, 3, 2, 2, 2, 151, 143, 3, 2, 2, 2, 151, 147, 3, 2, 2, 2, 152, 31, 3, 2, 2, 2, 153, 155, 7, 33, 2, 2, 154, 156, 5, 40, 21, 2, 155, 154, 3, 2, 2, 2, 155, 156, 3, 2, 2, 2, 156, 33, 3, 2, 2, 2, 157, 158, 7, 27, 2, 2, 158, 159, 5, 12, 7, 2, 159, 160, 7, 28, 2, 2, 160, 35, 3, 2, 2, 2, 161, 162, 7, 29, 2, 2, 162, 167, 5, 38, 20, 2, 163, 164, 7, 30, 2, 2, 164, 166, 5, 38, 20, 2, 165, 163, 3, 2, 2, 2, 166, 169, 3, 2, 2, 2, 167, 165, 3, 2, 2, 2, 167, 168, 3, 2, 2, 2, 168, 170, 3, 2, 2, 2, 169, 167, 3, 2, 2, 2, 170, 171, 7, 31, 2, 2, 171, 37, 3, 2, 2, 2, 172, 175, 7, 33, 2, 2, 173, 174, 7, 32, 2, 2, 174, 176, 5, 12, 7, 2, 175, 173, 3, 2, 2, 2, 175, 176, 3, 2, 2, 2, 176, 39, 3, 2, 2, 2, 177, 178, 7, 29, 2, 2, 178, 183, 5, 12, 7, 2, 179, 180, 7, 30, 2, 2, 180, 182, 5, 12, 7, 2, 181, 179, 3, 2, 2, 2, 182, 185, 3, 2, 2, 2, 183, 181, 3, 2, 2, 2, 183, 184, 3, 2, 2, 2, 184, 186, 3, 2, 2, 2, 185, 183, 3, 2, 2, 2, 186, 187, 7, 31, 2, 2, 187, 41, 3, 2, 2, 2, 188, 191, 7, 33, 2, 2, 189, 191, 5, 44, 23, 2, 190, 188, 3, 2, 2, 2, 190, 189, 3, 2, 2, 2, 191, 43, 3, 2, 2, 2, 192, 193, 9, 4, 2, 2, 193, 45, 3, 2, 2, 2, 22, 49, 56, 61, 70, 74, 88, 96, 104, 113, 121, 128, 141, 145, 149, 151, 155, 167, 175, 183, 190]

antlr/YorkieSchema.tokens

@@ -27,13 +27,14 @@ T__25=26
 T__26=27
 T__27=28
 T__28=29
-Identifier=30
-StringLiteral=31
-NumberLiteral=32
-BooleanLiteral=33
-SingleLineComment=34
-MultiLineComment=35
-WS=36
+T__29=30
+Identifier=31
+StringLiteral=32
+NumberLiteral=33
+BooleanLiteral=34
+SingleLineComment=35
+MultiLineComment=36
+WS=37
 'type'=1
 '='=2
 ';'=3
@@ -52,14 +53,15 @@ WS=36
 'undefined'=16
 '{'=17
 '}'=18
-'yorkie.Object'=19
-'yorkie.Array'=20
-'yorkie.Counter'=21
-'yorkie.Text'=22
-'yorkie.Tree'=23
-'('=24
-')'=25
-'<'=26
-','=27
-'>'=28
-'extends'=29
+'?'=19
+'yorkie.Object'=20
+'yorkie.Array'=21
+'yorkie.Counter'=22
+'yorkie.Text'=23
+'yorkie.Tree'=24
+'('=25
+')'=26
+'<'=27
+','=28
+'>'=29
+'extends'=30