1 files changed, 25 insertions, 0 deletions
diff --git a/scanners.go b/scanners.go
new file mode 100644
index 0000000..b5811af
--- /dev/null
+++ b/scanners.go
@@ -0,0 +1,25 @@
+package unilex
+
+// ScanNumber simplest scanner that accepts decimal int and float.
+func ScanNumber(l *Lexer) bool {
+	l.AcceptWhile("0123456789")
+	if l.AtStart() {
+		// not found any digit
+		return false
+	}
+	l.Accept(".")
+	l.AcceptWhile("0123456789")
+	return !l.AtStart()
+}
+
+// ScanAlphaNum returns true if next input token contains alphanum sequence that not starts from digit and not contains.
+// spaces or special characters.
+func ScanAlphaNum(l *Lexer) bool {
+	digits := "0123456789"
+	alpha := "qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM"
+	if !l.Accept(alpha) {
+		return false
+	}
+	l.AcceptWhile(alpha + digits)
+	return true
+}