How to generate Parser.swift and Scanner.swift from my own Grammar

[Christophe Bansart]

Dear all,
I'm a new user of Coco, and would like to generate my parser and scanner in swift. Unfortunately it works with the Coco.jar witch command : java -jar Coco.jar MyGrammar.ATG which returns "parser + scanner generated" and creates these 2 files.
With Coco/R Swift project, through XCode or by terminal, I had not be able to produce these two files. Any ideas ?
Tx
Chris

[mgriebling]

Just type "coco" from the command line and you’ll see all the command options: iMac:~ mikeg$ coco Coco/R (April 7, 2016) Usage: Coco Grammar.atg {{Option}} Options: -namespace <namespaceName> -frames <frameFilesDirectory> -trace <traceString> -o <outputDirectory> -lines Valid characters in the trace string: A trace automaton F list first/follow sets G print syntax graph I trace computation of first sets J list ANY and SYNC sets P print statistics S list symbol table X list cross reference table Scanner.frame and Parser.frame files needed in ATG directory or in a directory specified in the -frames option. You’ll need to put the compiled coco executable in a directory holding other executables. Go to the main Coco/R web site for more details. Cheers, Mike

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On 2 Feb 2019, at 11:35, Chrisb0606 ***@***.***> wrote: Dear all, I'm a new user of Coco, and would like to generate my parser and scanner in swift. Unfortunately it works with the Coco.jar witch command : java -jar Coco.jar MyGrammar.ATG which returns "parser + scanner generated" and creates these 2 files. With Coco/R Swift project, through XCode or by terminal, I had not be able to produce these two files. Any ideas ? Tx Chris

[Christophe Bansart]

Thank you Mike.
I did that, afterwards the program told me that my grammar is ok, but it doesn't produce the parser.swift and scanner.swift as I could expect.
I use this:
mb-cb$ ./Coco Grammar.ATG
Coco/R (April 7, 2016)
checking
0 errors detected
=> No parser.swift and scanner.swift produced
I also try all options associated with the ./Coco it changes nothing.

At the opposite, when I use the same command with the Java version:
$java -jar Coco.jar Grammar.ATG
Coco/R (Apr 19, 2011)
checking
parser + scanner generated
0 errors detected

=> The program produced the parser.java and the scanner.java according to my Grammar.

[mgriebling]

On 3 Feb 2019, at 7:18, Chrisb0606 ***@***.***> wrote: Thank you Mike. I did that, afterwards the program told me that my grammar is ok, but it doesn't produce the parser.swift and scanner.swift as I could expect. I use this: mb-cb$ ./Coco Grammar.ATG Coco/R (April 7, 2016) checking 0 errors detected => No parser.swift and scanner.swift produced I also try all options associated with the ./Coco it changes nothing. At the opposite, when I use the same command with the Java version: $java -jar Coco.jar Grammar.ATG Coco/R (Apr 19, 2011) checking parser + scanner generated 0 errors detected => The program produced the parser.java and the scanner.java according to my Grammar. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ACTyZM76A3iKeMr7751Va-bg595ptSZwks5vJtOHgaJpZM4afqsh>.

Where did you locate the Scanner.frame and Parser.frame files? Normally they are expected to be in the same directory as the .ATG file. Mike

[Christophe Bansart]

Yes, the Scanner.frame and Parser.frame are in the same directory than my Grammar.ATG
Tx
Christophe

[mgriebling]

Here’s the run from my Coco installation using the Coco.atg: iMac:Coco mikeg$ Coco Coco.atg Coco/R (April 7, 2016) checking Expression deletable Term deletable parser + scanner generated 0 errors detected This was just recompiled to confirm the compiler didn’t change anything significant. Have you tried the Coco.atg? My Coco is installed in the Applications directory. Try sending me your atg file and I can run it here. Mike

…

On 3 Feb 2019, at 11:01, Chrisb0606 ***@***.***> wrote: Yes, the Scanner.frame and Parser.frame are in the same directory than my Grammar.ATG Tx Christophe — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#3 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ACTyZBcZe6pqGqjD6RHOjU9vMsCWHArKks5vJwfDgaJpZM4afqsh>.

[Christophe Bansart]

Hi, I restart from the beginning Coco works great now, and generate 2 swift files.
My grammar has not errors but some rule that cannot be reached, it may the reason why the files are not generated. Please find in attachment (I've changed the extension of grammar .ATG by .txt due to the filter of github)
Wims.txt

[mgriebling]

Looked at your grammar and the errors about not being able to reach productions such as VarAlloc, RandInt, etc are occurring because your syntax never uses those productions. Either comment them out or put them in your top-level production:

Wims = TitleDef LangageDef AuthorDef EmailDef ComputeanswerDef PrecisionDef [Range] {Integer} StatementDef AnswerDef

    // remove errors by adding unreachable productions
    VarAlloc RandInt Rational Real Complex RangeDef HintDef HelpDef ConditionDef
    FeedbackDef SolutionDef Text Matrix Function
.

I was then able to generate the output files:

iMac:Coco mikeg$ coco Wims.atg
Coco/R (April 7, 2016)
checking
parser + scanner generated
0 errors detected