The path field expects a directory where it can find the javac binary in.
Adding flags behind the directory also fails:
The debugger fails to initialize and leaves some process running in the
background requiring me to kill the process before I can try to run the
debugger again.
Any more
Hello People,
being an ANTLR beginner, I would very much appreciate advice concerning good
practise for a rather simple task. The task is the translation of a JPQL's
(Java
Persistence Query Language) where clause into a proprietary query language.
The clause has the well-known expression
I get the impression you think that when creating AST's, ANTLR inserts
parenthesis (brackets). This is not the case: I guess what you're seeing is
just the tree's `toStringTree()` that displays these parenthesis to make the
hierarchy of the tree apparent.
Or am I misinterpreting your question?
Wait I think I misunderstood. Your example `(a OR (b OR (c AND d)))` is just
an example expression, right?
In that case, yes, these parenthesis are part of the token stream, but if
you apply rewrite rules (or AST operators `^` and `!`) properly, these
parenthesis are easily removed from your parse
You might be better using remote debugging but you can do what you
suggested earlier and create a script, then tell Works that that is the
java compiler.
Jim
-Original Message-
From: antlr-interest-boun...@antlr.org [mailto:antlr-interest-
boun...@antlr.org] On Behalf Of Ben Corne
If the output language has the same operator precedence as the input
language then there is no need to add additional parens. Just preserve the
presence of parens in the input and reflect them in the output:
expression : expr - ^(EXPRESSION expr) ; // In AST will indicate ()
expr : orexpr -
Optimal placement of parentheses is tricky; as a first step, you want to use
the
form
^('+' A B C D E F )
as long as the operator is associative;
then you want to parenthesize only when required to by changes in operator
precedence; the easiest way is actually to have two versions of each
I have 4 grammar file: lexer L.g, parser P.g and two grammars G1 and G2 (see
below). After running antlr to generate Java files compilation fails:
[mkdir] Created dir: target\classes
[javac] Compiling 10 source files to target\classes
[javac] target\src\example\G1Lexer.java:18: cannot
Feature Request:
A way to visualize the Parse Graph of a grammar by the sequence of Tokens
consumed by the rules.
The Parse Graph should be generated by selecting a rule or rule decision and
using the contextual menu
or the Grammar menu. The root of the Parse Graph should be the start of the
