/// <summary>
/// Parses a linestring text.
/// </summary>
/// <param name="tokens">The list of tokens.</param>
/// <param name="is3D">bool value indicating whether linestring being parsed has z-coordinate.</param>
/// <param name="isMeasured">bool value indicating whether linestring being parsed has m-value.</param>
/// <returns>A linestring specified by tokens.</returns>
/// <remarks><![CDATA[<empty set> | <left paren> <point> {<comma> <point>}* <right paren>]]></remarks>
private static LineString ParseLineStringText(WktTokensBuffer tokens, bool is3D, bool isMeasured)
{
WktToken t = tokens.Peek(true);
if (t.Type == TokenType.STRING && t.Value.ToUpperInvariant() == "EMPTY")
{
tokens.GetToken(true);
return(new LineString());
}
WktReader.Expect(TokenType.LEFT_PARENTHESIS, tokens);
IEnumerable <Coordinate> coords = WktReader.ParseCoordinates(tokens, is3D, isMeasured);
WktReader.Expect(TokenType.RIGHT_PARENTHESIS, tokens);
return(new LineString(coords));
}