lexing

1 files changed, 29 insertions, 0 deletions

diff --git a/src/ljstype.js b/src/ljstype.js
new file mode 100644
index 0000000..52ac153
--- /dev/null
+++ b/src/ljstype.js
@@ -0,0 +1,29 @@
+/* jshint esversion: 6 */
+"use strict";
+
+const assert = require('assert');
+
+const lisdigit = function(c) {
+    return /^\d$/.test(c.charAt(0));
+
+const lisxdigit = function(c) {
+    return /^[0-9a-fA-F]$/.test(c.charAt(0));
+};
+
+const lisspace = function(c) {
+    return /^\s$/.test(c.charAt(0));
+};
+
+const lislalpha = function(c) {
+    return /^[_a-zA-z]$/.test(c.charAt(0));
+};
+
+const lislanum = function(c) {
+    return /^[_a-zA-z0-9]$/.test(c.charAt(0));
+};
+
+module.exports.lisdigit  = lisdigit;
+module.exports.lislalpha = lislalpha;
+module.exports.lislanum  = lislanum;
+module.exports.lisspace  = lisspace;
+module.exports.lisxdigit = lisxdigit;
\ No newline at end of file