Make Plex read from string

[Anonimista]

Plex (lexer generator) reads from the standard input or from a file

Code: Pascal  [Select][+][-]

1. yyinput, yyoutput : Text;        (* input and output file *)

Is there a way to make it read a string? ie I need to read a string as if it was a stream I guess.

[marcov]

Streams can be assigned to "text" variables. See Streamio.assignstream

[lucamar]

To complete Marco's answer, you can build a stream from a string by using a TStringStream, so it would be a two-step process: creating the stream from the string and then assigning a textfile to that stream with StreamIO.AssignStream.

[Anonimista]

Thanks, it should work, here is a small test I did

Code: Pascal  [Select][+][-]

1. program project1;
2.  
3. {$mode objfpc}{$H+}
4. uses streamio, classes;
5.  
6. var
7.  
8.   t: Text;
9.   s: string;
10.   stream: TStringStream;
11.  
12. begin
13.  
14.   stream := TStringStream.Create('abcd');
15.   assignstream(t, stream);
16.   reset(t);
17.   readln(t, s);
18.   writeln(s);
19.   readln;
20.   stream.Free;
21.  
22. end.
23.