Getting Started - TRGEN

[johnholliday]

Followed the installation instructions, but getting this...

[kaby76]

Grammars have to follow a few rules, otherwise the tool can't figure out what to do.

• Antlr4 grammars should be in files with a .g4 extension.
• Split grammars need to end with Lexer.g4 and Parser.g4. For example, JavaLexer.g4 and JavaParser.g4. The "grammar name" for this combined grammar is Java.
• There must be one or two "top-level" .g4 files but no more. A top-level .g4 is processed by the Antlr tool. Imported .g4's are not processed by the Antlr tool on the command line.
• If you don't have a desc.xml file, you will need to tell what target to generate. E.g. "trgen -t Java" or "trgen -t CSharp", etc.

Given that, what .g4's do you have? What are they named?

[johnholliday]

@kaby76 There is no .g4 in this case. I'm following the documentation for trgen:

"If the current directory is empty, trgen will create a parser for the Arithmetic.g4 grammar."

md test
cd test
trgen

This should create a parser, correct?

[kaby76]

Sorry. The doc is off slightly here. I changed this code. Instead of trgen, it should be trgen --arithmetic -t *target*. It will then create an arithmetic example.

[kaby76]

BTW, I think the reason I changed this is because I would type trgen just to see the help message (to check what options are available), and end up getting a ton of files spewed in the directory that I was working in.

[johnholliday]

Hi Ken, Thanks for responding. I’ll play around with it. BTW – I like the approach you’ve taken here. Please let me know how I can assist you. Best, John John F. Holliday President and CEO +1 (404) 542-4637 Holliday & Associates www.holliday.associates<https://www.holliday.associates/> Book time with John ***@***.***?anonymous&ep=pcard> From: Ken Domino ***@***.***> Sent: Friday, August 23, 2024 7:01 AM To: kaby76/Trash ***@***.***> Cc: John Holliday ***@***.***>; Author ***@***.***> Subject: Re: [kaby76/Trash] Getting Started - TRGEN (Issue #479) BTW, I think the reason I changed this is because I would type trgen just to see the help message (to check what options are available), and end up getting a ton of files spewed in the directory that I was working in. — Reply to this email directly, view it on GitHub<#479 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ABIMPXEQQ5GF4SNHSXWO2T3ZS4I6JAVCNFSM6AAAAABM7CFFJKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDGMBWHA2DKOBXGE>. You are receiving this because you authored the thread.Message ID: ***@***.******@***.***>>