syntax: highlight numbers

fix #12

Author: Lukas Neubert

syntaxes/tests/numbers.bas

@@ -0,0 +1,21 @@
+' SYNTAX TEST "source.vba" "numbers"
+
+Dim dec As Decimal
+dec = 2.375D
+'     ^^^^^^ constant.numeric.decimal
+dec = 4.000
+'     ^^^^^ constant.numeric.decimal
+
+Dim doub As Double
+doub= 4.0R
+'     ^^^^ constant.numeric.decimal
+
+Dim sing As Single
+sing = 4.2F
+'      ^^^^ constant.numeric.decimal
+
+Dim i As Integer
+i = 123
+'   ^^^ constant.numeric.integer
+i = 1_000_000
+'   ^^^^^^^^^ constant.numeric.integer

syntaxes/vba.tmLanguage.json

@@ -8,6 +8,7 @@
 	"patterns": [
 		{ "include": "#comments" },
 		{ "include": "#keywords" },
+		{ "include": "#numbers" },
 		{ "include": "#option" },
 		{ "include": "#types" },
 		{ "include": "#visibility" }
@@ -26,6 +27,18 @@
 				}
 			]
 		},
+		"numbers": {
+			"patterns": [
+				{
+					"name": "constant.numeric.decimal",
+					"match": "([0-9]+)(\\.)([0-9]+)(D|R|F)?"
+				},
+				{
+					"name": "constant.numeric.integer",
+					"match": "(([0-9]+)([_]?))+"
+				}
+			]
+		},
 		"option": {
 			"name": "storage.modifier.option",
 			"match": "\\b(Option (Explicit|Private Module|Base|(Compare (Binary|Text)+))?)\\b"