Native Introspection Opcodes syntax highlighting

Author: nathanielCherian

examples/next.cash

@@ -4,6 +4,7 @@ contract P2PKH() {
     function spend() {
         // bytes2 left, bytes2 right = 0x123456.split(2);
         // require(left == right);
+
         require(tx.outputs[0].value == tx.inputs[this.activeInputIndex].value - 1000);
     }
 }

syntaxes/cashscript.tmLanguage.json

@@ -67,6 +67,9 @@
                 },
                 {
                     "include": "#control-other"
+                },
+                {
+                    "include": "#control-this"
                 }
             ]
         },
@@ -92,7 +95,10 @@
             "match": "\\b(new)\\b",
             "name": "keyword.control.cashscript"
         },
-
+        "control-this": {
+            "match": "\\b(this)\\b",
+            "name": "variable.language.transaction.cashscript"
+        },
         "constant": {
             "patterns": [
                 {
@@ -176,7 +182,7 @@
         "global-variables": {
             "patterns": [
                 {
-                    "match": "\\b(tx)(?:.(time|age|version|hashPrevouts|hashSequence|outpoint|bytecode|value|sequence|hashOutputs|locktime|hashtype|preimage))?\\b",
+                    "match": "\\b(tx)(?:.(version|locktime|inputs|outputs))?\\b",
                     "captures":{
                         "1":{
                             "name":"variable.language.transaction.cashscript"