func init() {
	initTokens()
	var err error
	Lexer, err = initLexer()
	if err != nil {
		panic(err)
	}
}
Called at package initialization. Creates the lexer and populates token lists.
package metasql
import (
	"strings"
	lex "github.com/timtadh/lexmachine"
	"github.com/timtadh/lexmachine/machines"
)
var Literals []string        
var Keywords []string        
var Tokens []string          
var TokenIds map[string]int  
var Lexer *lex.Lexer         