func Match(text, expr string) (captures []string) {
	return MustCompile(expr).Match(text)
}
Match is like MatchIndex except that the capture are returned instead of the
positions.
package pattern
import (
	"fmt"
)
func MatchIndexAll(text, expr string, limit int) (captures [][]int) {
	return MustCompile(expr).MatchIndexAll(text, limit)
}
func MatchIndex(text, expr string) (captures []int) {
	return MustCompile(expr).MatchIndex(text)
}
func MatchAll(text, expr string, limit int) (captures [][]string) {
	return MustCompile(expr).MatchAll(text, limit)
}