Added some ansi color escapes.

examples/sample_game.nom

@@ -95,7 +95,7 @@ with secrets:
         secret %approvals = []
         say ".."
             |Proposal:
-            |\(%src)
+            |\(bright)\(blue)\(%src)\(reset color)
 
     parse [propose %action] as:
         propose source (..)
@@ -253,7 +253,7 @@ as bill: approve
 as dave: join
 
 propose:
-    rule [declare war] =: say "WAR!!!"
+    rule [declare war] =: say "\(red)WAR!!!\(reset color)"
     with secrets:
         secret %president = (nil)
         rule [elect president from %candidates] =:

lib/utils.nom

@@ -84,3 +84,33 @@ compile [max of %items by %value_expr] to:
         |    return \(%value_expr as lua)
         |end)
 
+# String utilities
+compile [nl, newline, line feed, linefeed, lf] to: ".."
+    |"\n"
+compile [tab] to: ".."
+    |"\t"
+compile [bell] to: ".."
+    |"\a"
+compile [cr, carriage return] to: ".."
+    |"\r"
+compile [backspace] to: ".."
+    |"\b"
+compile [form feed, formfeed] to: ".."
+    |"\f"
+compile [vertical tab] to: ".."
+    |"\v"
+
+lua code ".."
+    |do;
+    |    local colors = {
+    |        ["reset color"] = 0, bright = 1, dim = 2, underscore = 4, blink = 5,
+    |        inverse = 7, hidden = 8, black = 30, red = 31, green = 32, yellow = 33,
+    |        blue = 34, magenta = 35, cyan = 36, white = 37, ["on black"] = 40,
+    |        ["on red"] = 41, ["on green"] = 42, ["on yellow"] = 43, ["on blue"] = 44,
+    |        ["on magenta"] = 45, ["on cyan"] = 46, ["on white"] = 47,
+    |    };
+    |    for name,code in pairs(colors) do;
+    |        local escape = "\\"\\\\27["..tostring(code).."m\\""
+    |        nomsu:defmacro(name, function() return escape end, "");
+    |    end;
+    |end;