I have this parser rule: And I’m iterating over the pows using ctx.pow(), but I would like to know too what operator there was. Unfortunately, ctx.operator just gives the last one encountered and ctx.TIMES() just gives a dumb list with a reapeted ‘*’. Do I really have to do a sub-rule for th…
Tag: antlr4
ANTLR Visitor Implementation For ArrayInitVisitorImpl
I am trying to build a visitor implementation that will convert a string array to unicode. I am using the following grammar: I have gotten as far as this: and I’m not sure how to handle the nested visiting. Any assistance is appreciated. Edit: Thank to help from Bart, I was able to come up with a final …
How to force ANTLR to parse all input CharStream
I’m using ANTLR4 to parse a syntax file. When I use BaseErrorListener to detect errors, I got a problem. When faced with an illegal input string, ANTLR automatically matches the appropriate branch and then ignores the subsequent stream of characters even if it contains errors. And I want to detect that …
Nested Boolean Expression Parser using ANTLR
I’m trying to parse a Nested Boolean Expression and get the individual conditions within the expression separately. For e.g., if the input string is: (A = a OR B = b OR C = c AND ((D = d AND E = e) OR (F = f AND G = g))) I would like to get the conditions with the
antlr4 – get left and right sibling of rule context
An easy question, on which I cannot find something useful in the API docs: is there a way to get the left and right sibling of a ParserRuleContext? Say I have in my .g4: identifiers : identifier (‘,’…