Hello, wise monks!
I've been trying to construct parser for Clarion language and decided to start with simple things. After reading Parse::RecDescent's documentation, I took Parse::RecDescent Tutorial as an example to study and modify.
The article has a code example which parses different code pieces, among which there's a code with assignment and printing of value:
$parser->startrule("a = 5 ; print a");
That works fine. Until there're other instructions after print_instruction, in which case it fails to parse anything after first print:
$parser->startrule("a = 5 ; print a ; print a"); # this fails
$parser->startrule("a = 5 ; print a ; b = 1"); # this fails either
Investigating parser trace I've found that the only text which is consumed for the entire input is
[a = 5 ; print].
Can wise monks help to understand, why the argument to print isn't consumed? And how to rewrite those rules for print_instruction to work correctly?