initial commit

column.go

@@ -0,0 +1,29 @@
+package simql
+
+import (
+	"regexp"
+)
+
+var columnRegexp = regexp.MustCompile("^([^ ]+)( as ([^ ]+))?$")
+
+type Column string
+
+func (c Column) IsValid() bool {
+	return columnRegexp.MatchString(string(c))
+}
+
+func (c Column) Parse() (string, string, bool) {
+	if columnRegexp.MatchString(string(c)) {
+		result := columnRegexp.FindAllStringSubmatch(string(c), -1)
+		for _, r := range result {
+			column, as := r[1], r[3]
+			return column, as, true
+		}
+	}
+
+	return "", "", false
+}
+
+func (c Column) String() string {
+	return string(c)
+}