# Enum ExtensionDirection
Direction for seed extension.

Defined in | <seqan/seeds.h>
Signature | `enum ExtensionDirection;`

## Enum Values

`EXTEND_NONE = 0` | Perform no extension.
`EXTEND_LEFT = 1` | Perform extension towards the left.
`EXTEND_RIGHT = 2` | Perform extension towards the right.
`EXTEND_BOTH = 3` | Perform extension to both directions.

## See Also

- extendSeed

#### Dox Sources

    /*!
     * @enum ExtensionDirection
     *
     * @headerfile <seqan/seeds.h>
     *
     * @brief Direction for seed extension.
     *
     * @signature enum ExtensionDirection;
     *
     * @see Seed#extendSeed
     *
     * @val ExtensionDirection EXTEND_NONE = 0;
     *
     * @brief Perform no extension.
     *
     * @val ExtensionDirection EXTEND_LEFT = 1;
     *
     * @brief Perform extension towards the left.
     *
     * @val ExtensionDirection EXTEND_RIGHT = 2;
     *
     * @brief Perform extension towards the right.
     *
     * @val ExtensionDirection EXTEND_BOTH = 3;
     *
     * @brief Perform extension to both directions.
     */