Support initial batch of languages

syntax/stxR.go

@@ -0,0 +1,20 @@
+//go:build stxR || stxAll
+
+package syntax
+
+func init() {
+	syntaxMap["r"] = &lazySyntax{init: func() []byte {
+		return []byte(`filetype: r
+
+detect:
+    filename: "\\.(r|R)$"
+
+rules:
+    - statement: "\\b(break|else|for|function|if|in|next|repeat|return|while)\\b"
+    - constant: "\\b(TRUE|FALSE|NULL|Inf|NaN|NA|NA_integer_|NA_real_|NA_complex_|NA_character_)\\b"
+    - comment:
+        start: "#"
+        end: "$"
+        rules: []`)
+	}}
+}