.Modelica.Utilities.Strings.scanToken .Modelica.Utilities.Strings.scanToken(token, nextIndex) = Strings.scanToken(string, startIndex, unsigned=false);
Function scanToken scans the string starting at index "startIndex" and returns the next token, as well as the index directly after the token. The returned token is a record that holds the type of the token and the value of the token:
| token.tokenType | Type of the token, see below |
| token.real | Real value if tokenType == TokenType.RealToken |
| token.integer | Integer value if tokenType == TokenType.IntegerToken |
| token.boolean | Boolean value if tokenType == TokenType.BooleanToken |
| token.string | String value if tokenType == TokenType.StringToken/IdentifierToken/DelimiterToken |
Variable token.tokenType is an enumeration (emulated as a package with constants) that can have the following values:
import T = Modelica.Utilities.Types.TokenType;
| T.RealToken | Modelica Real literal (e.g., 1.23e-4) |
| T.IntegerToken | Modelica Integer literal (e.g., 123) |
| T.BooleanToken | Modelica Boolean literal (e.g., false) |
| T.StringToken | Modelica String literal (e.g., "string 123") |
| T.IdentifierToken | Modelica identifier (e.g., "force_a") |
| T.DelimiterToken | any character without white space that does not appear as first character in the tokens above (e.g., "&") |
| T.NoToken | White space, line comments and no other token until the end of the string |
Modelica line comments ("// ... end-of-line/end-of-string") as well as white space is ignored. If "unsigned=true", a Real or Integer literal is not allowed to start with a "+" or "-" sign.
import Modelica.Utilities.Strings;
import T = Modelica.Utilities.Types.TokenType;
(token, index) := Strings.scanToken(string);
if token.tokenType == T.RealToken then
realValue := token.real;
elseif token.tokenType == T.IntegerToken then
integerValue := token.integer;
elseif token.tokenType == T.BooleanToken then
booleanValue := token.boolean;
elseif token.tokenType == T.Identifier then
name := token.string;
else
Strings.syntaxError(string,index,"Expected Real, Integer, Boolean or identifier token");
end if;
function scanToken extends Modelica.Icons.Function; input String string "String to be scanned"; input Integer startIndex(min = 1) = 1 "Start scanning of string at character startIndex"; input Boolean unsigned = false "= true, if Real and Integer tokens shall not start with a sign"; output Types.TokenValue token "Scanned token"; output Integer nextIndex "Index of character after the found token; = 0, if NoToken"; end scanToken;