Is there an ANTLR4 grammar for ANTLR4 [closed] - antlr4

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I know that there is an ANTLR3 grammar for ANTLR3, and it seems to me that the ANTLR4 distribution contains ANTLR4 grammar written in ANTLR3, but is there a grammar for ANTLR4 written in ANTLR4 itself?

There is no official grammar currently, but one is available as part of ANTLRWorks 2. This grammar is definitely missing some of the error reporting capabilities that are in the official grammar, and may differ slightly in behavior.
GrammarLexer.g4: This is the lexer grammar. The grammar uses the abstract=true option, which was removed from the official ANTLR release so the grammar only works with the special 4.1-opt release in my fork of the project.
GrammarLexer.java: This extends the generated AbstractGrammarLexer.java and provides necessary implementations of emit() and handleBeginArgAction().
GrammarParser.g4: This is the parser grammar. It is also marked abstract, but currently doesn't use any functionality that requires this option so it could be removed. I included it for consistency with the code generated for the lexer.

There is also one on GitHub, authored by Terence Parr, himself.
https://github.com/antlr/grammars-v4/blob/master/antlr/antlr4

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how to download Cucumber testing tool for Writing scenarios in gherkin [closed]

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I am looking to download just cucumber software to write the scenarios in Gherkin basically it's for our Product Owner to use for writing the scenarios as part of BDD. When I look online I see I could not find a standalone software for cucumber. Is there any standalone software which installs cucumber where scenarios can be written in Gherkin language ??
As part of our current development processes, we also use
Gherkin basically it's for our Product Owner to use for writing the scenarios as part of BDD
Any relatively modern text editor supports plugins or packages that help you write your requirements in Gherkin. As for us - we use Atom with the following packs:
language-gherkin
gherkin-autocomplete
gherkin-table-formatter
But there are a lot more for you to customize it according to your own taste.
As a piece of advice I would strongly recommend to add a linter check into your CI server's pipeline. We use gherkin-lint with great success. Even non techie people get used to it quite quick and produce syntax correct Gherkin for our next Cucumber steps.
I found a plugin which integrates with notepad++. After that, I am able to write feature files with gherkin language.
https://github.com/famished-tiger/gherkin-highlighting

Which projects have been ported successfully from Haskell to Frege? [closed]

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I'd like to learn how to port Haskell code to Frege. Are there any projects that have already been ported and serve as good examples?
Almost all of the existing library code (i.e. Prelude, Data, etc.) have been ported. Also things like QuickCheck, with almost no adaptions.
An interesting case is Data.HashMap which has the same interface as in Haskell, but the implementation relies on Java arrays.
Things to watch out for: unsupported GHC extensions, Strings/Text, code that uses foreign functions (that is, C).
In such cases the Frege analogue of Haskell is usually slightly different, or misses features. Examples would be JSON support and parser combinator libraries (Data.MicroParsec).

Haskell RPC framework in production [closed]

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I really think Haskell is a awesome programming language, but it seems that Haskell lacks the handy and mature tools can be used in production.
Does Haskell have a mature, stable and convenient RPC framework to use like Finagle in Scala? Has any one use Haskell in production and how do they handle the communication between different ends?
Thanks.
Yes. There is https://www.haskell.org/haskellwiki/HaXR. If JSON is more your thing then there's also http://hackage.haskell.org/package/json-rpc-server, but that's only for the server side (the same guy is also doing a client library but it's not as mature)
Having said that: RPC should always be the last resort because it's always bad for reliability and performance (this is general programming advice, not specific to Haskell)

Expression engine String manipulation [closed]

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Any idea how to do advanced string manipulation in Expression Engine?
I tried to use php code inside expression engine template but I ask about if there is any another solution using expression engine,Or there is any plugin can support this feature?
Thanks
It looks like the Streeng plugin will do what you need. Their example even does exactly what you're looking for:
{if "{exp:streeng find='this' insensitive='yes'}This is a test string{/exp:streeng}"}
We found 'this' in 'This is a test string'!
{/if}
Just as a note, you can post EE-specific questions to expressionengine.stackexchange.com and you might get more answers.
I would recommend a plugin called ce string - by causing effect. http://www.causingeffect.com/software/expressionengine/ce-string
It has a whole range of string manipulation functions and is something I tend to use on all my Expression Engine projects for one reason or another.

Generate diagrams for Haskell code [closed]

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Is there something that is kind of a cross between graphmod and haddock? I want a diagram like graphmod showing dependencies/relationships, but I want to include additional documentation in the diagram.
Not an existing one. Here are the list of available Haskell visualisation utilities (at least those on Hackage):
graphmod which you've already found: visualise module dependencies.
prof2dot visualise profiling reports
hs2dot visualise Haskell code
vacuum (and related packages) visualises the data structures at run-time
SourceGraph (disclaimer: this is mine) aims to provide different forms of visualisation of the call graphs and perform some analyses; haven't had much time to work on this lately though.
graphtype is for comparing data types
It may be possible to use doxygen to generate documentation with visualisation, but a quick Google didn't reveal any work on providing support for Haskell in doxygen (and it would require different markup than what Haddock uses).

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