lang: lex: add base/limit markers around token type enums

lang/include/ivy/lang/lex.h

@@ -8,7 +8,8 @@
 
 enum ivy_token_type {
 	IVY_TOK_NONE = 0,
-	IVY_TOK_KEYWORD = 100,
+	__IVY_TOK_INDEX_BASE = 100,
+	IVY_TOK_KEYWORD,
 	IVY_TOK_SYMBOL,
 	IVY_TOK_ATOM,
 	IVY_TOK_INT,
@@ -19,12 +20,13 @@ enum ivy_token_type {
 	IVY_TOK_STR_START,
 	IVY_TOK_STR_END,
 	IVY_TOK_LINEFEED,
-	IVY_TOK_TYPE_COUNT,
+	__IVY_TOK_INDEX_LIMIT,
 };
 
 enum ivy_keyword {
 	IVY_KW_NONE = 0,
-	IVY_KW_PACKAGE = 200,
+	__IVY_KW_INDEX_BASE = 200,
+	IVY_KW_PACKAGE,
 	IVY_KW_USE,
 	IVY_KW_CLASS,
 	IVY_KW_PROTOCOL,
@@ -47,12 +49,13 @@ enum ivy_keyword {
 	IVY_KW_GET,
 	IVY_KW_SET,
 	IVY_KW_END,
-	IVY_KW_TYPE_COUNT,
+	__IVY_KW_INDEX_LIMIT,
 };
 
 enum ivy_symbol {
 	IVY_SYM_NONE = 0,
-	IVY_SYM_DOT = 300,
+	__IVY_SYM_INDEX_BASE = 300,
+	IVY_SYM_DOT,
 	IVY_SYM_SQUOTE,
 	IVY_SYM_DQUOTE,
 	IVY_SYM_LEFT_BRACE,
@@ -101,7 +104,7 @@ enum ivy_symbol {
 	IVY_SYM_EQUAL_RIGHT_ANGLE,
 	IVY_SYM_FORWARD_SLASH_ASTERISK,
 	IVY_SYM_ASTERISK_FORWARD_SLASH,
-	IVY_SYM_TYPE_COUNT,
+	__IVY_SYM_INDEX_LIMIT,
 };
 
 struct ivy_token {