improved syntax highlighting

src/packs/lsp_server_metta/vscode/syntaxes/mettalanguage.json

@@ -12,43 +12,64 @@
 			"include": "#variables"
 		},
 		{
-			"include": "#keywords"
+			"include": "#operatorkeywords"
+		},
+		{
+			"include": "#controlkeywords"
 		},
 		{
 			"include": "#comment"
 		},
 		{
 			"include": "#strings"
+		},
+		{
+			"include": "#character"
+		},
+		{
+			"include": "#number"
 		}
 	],
 	"repository": {
 		"keywords": {
+			"patterns": [{
+				"name": "no.color.metta",
+				"match": "[a-zA-Z_][a-zA-Z_\\-*0-9]*!?"
+			}]
+		},
+		"operatorkeywords": {
+			"patterns": [{
+				"name": "keyword.operator.metta",
+				"match": "=="
+			}]
+		},
+		"controlkeywords": {
 			"patterns": [{
 				"name": "keyword.control.metta",
-				"match": "[a-zA-Z_][a-zA-Z_\\-0-9]*"
+				"match": ":|=|\\->|!"
 			}]
 		},
 		"doctag" : {
 			"patterns": [
 				{
-					"name": "doctag.metta",
-					"match": "\\x40[a-zA-Z_][a-zA-Z_\\-\\*0-9]*"
+					"name": "keyword.other.metta",
+					"match": "\\x40[a-zA-Z_][a-zA-Z_\\-*0-9]*!?"
 				}
 			]
 		},
 		"namespace" : {
 			"patterns": [
 				{
-					"name": "namespace.metta",
-					"match": "\\x26[a-zA-Z_][a-zA-Z_\\-\\*0-9]*"
+					"name": "variable.language.metta",
+					"match": "\\x26[a-zA-Z_][a-zA-Z_\\-*0-9]*!?"
 				}
 			]
 		},
 		"variables" : {
 			"patterns": [
 				{
-					"name": "variable.metta",
-					"match": "\\x24[a-zA-Z_][a-zA-Z_\\-\\*0-9]*"
+					"name": "variable.other.metta",
+					"match": "\\x24[a-zA-Z_][a-zA-Z_\\-*0-9]*!?"
 				}
 			]
 		},
@@ -71,6 +92,26 @@
 					"match": "\\\\."
 				}
 			]
+		},
+		"character":{
+			"begin": "'",
+			"end": "'",
+			"name": "string.quoted.single.metta",
+			"patterns": [
+				{
+					"match": "\\\\.",
+					"name": "constant.character.escape.metta"
+				}
+			]
+		},
+		"number": {
+			"patterns": [
+				{
+					"name": "constant.numeric.metta",
+					"begin": ";",
+					"match": "-?[0-9]+(.[0-9]+)?"
+				}
+			]
 		}
 	},
 	"scopeName": "source.metta"