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packtpub-xtext-book-examples | Implementing Domain-Specific Languages | Learning library

 by   LorenzoBettini Java Version: Current License: EPL-1.0

 by   LorenzoBettini Java Version: Current License: EPL-1.0

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kandi X-RAY | packtpub-xtext-book-examples Summary

packtpub-xtext-book-examples is a Java library typically used in Tutorial, Learning applications. packtpub-xtext-book-examples has no vulnerabilities, it has a Weak Copyleft License and it has low support. However packtpub-xtext-book-examples has 21 bugs and it build file is not available. You can download it from GitHub.
Implementing Domain-Specific Languages with Xtext and Xtend.
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • packtpub-xtext-book-examples has a low active ecosystem.
  • It has 30 star(s) with 18 fork(s). There are 9 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 1 open issues and 3 have been closed. On average issues are closed in 86 days. There are no pull requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of packtpub-xtext-book-examples is current.
This Library - Support
Best in #Learning
Average in #Learning
This Library - Support
Best in #Learning
Average in #Learning

quality kandi Quality

  • packtpub-xtext-book-examples has 21 bugs (0 blocker, 0 critical, 21 major, 0 minor) and 2380 code smells.
This Library - Quality
Best in #Learning
Average in #Learning
This Library - Quality
Best in #Learning
Average in #Learning

securitySecurity

  • packtpub-xtext-book-examples has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • packtpub-xtext-book-examples code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
This Library - Security
Best in #Learning
Average in #Learning
This Library - Security
Best in #Learning
Average in #Learning

license License

  • packtpub-xtext-book-examples is licensed under the EPL-1.0 License. This license is Weak Copyleft.
  • Weak Copyleft licenses have some restrictions, but you can use them in commercial projects.
This Library - License
Best in #Learning
Average in #Learning
This Library - License
Best in #Learning
Average in #Learning

buildReuse

  • packtpub-xtext-book-examples releases are not available. You will need to build from source code and install.
  • packtpub-xtext-book-examples has no build file. You will be need to create the build yourself to build the component from source.
  • Installation instructions are not available. Examples and code snippets are available.
  • packtpub-xtext-book-examples saves you 180737 person hours of effort in developing the same functionality from scratch.
  • It has 183177 lines of code, 8323 functions and 476 files.
  • It has high code complexity. Code complexity directly impacts maintainability of the code.
This Library - Reuse
Best in #Learning
Average in #Learning
This Library - Reuse
Best in #Learning
Average in #Learning
Top functions reviewed by kandi - BETA

kandi has reviewed packtpub-xtext-book-examples and discovered the below as its top functions. This is intended to give you an instant insight into packtpub-xtext-book-examples implemented functionality, and help decide if they suit your requirements.

  • 12 . 4
  • Main entry point for the SJJSFunction
  • 12 . 7
  • Replies the name of the rule .
  • Matches Tokenized Expression
  • parses the RULE_HEX
  • Create the package contents .
  • Replies the type of the given expression .
  • Generates the sequence for a given semantic object
  • identify a greeting

packtpub-xtext-book-examples Key Features

in the files org.eclipse.jdt.core.prefs you need to replace 1.5 with 1.6

in MANIFEST.MF and .classpath files you need to replace J2SE-1.5 with JavaSE-1.6

default

copy iconCopydownload iconDownload
fragment = ecore.EcoreGeneratorFragment auto-inject {

Range Specification in Xtext

copy iconCopydownload iconDownload
Model:
    (expressions+=Comparison ";")*;
Comparison returns Expression:
    Range ({Comparison.left=current} op=(">=" | "<=" | ">" | "<" | "=>" | "<=>" | "xor" | "=") right=Range)*;
Range:
    (leftBracket=('[' | ']') left=Atomic '-' right=Atomic rightBracket=('[' | ']'))
    |
    Atomic;
Atomic:
    value=INT;
[1-2];
]3-5[;
[1-4[ < ]1-6];
6;
1 < 2;
-----------------------
Model:
    (expressions+=Comparison ";")*;
Comparison returns Expression:
    Range ({Comparison.left=current} op=(">=" | "<=" | ">" | "<" | "=>" | "<=>" | "xor" | "=") right=Range)*;
Range:
    (leftBracket=('[' | ']') left=Atomic '-' right=Atomic rightBracket=('[' | ']'))
    |
    Atomic;
Atomic:
    value=INT;
[1-2];
]3-5[;
[1-4[ < ]1-6];
6;
1 < 2;

Community Discussions

Trending Discussions on packtpub-xtext-book-examples
  • Range Specification in Xtext
Trending Discussions on packtpub-xtext-book-examples

QUESTION

Range Specification in Xtext

Asked 2017-Mar-24 at 08:44

I am new to XText and want to define a language element for specifying ranges of values. Examples: [1-2] or ]0.1-0.3[

I have the following rule for this purpose:

Range returns Expression:
Atomic (leftBracket=('[' | ']') left=Atomic '-'  right=Atomic rightBracket=('[' | ']'))*;

Atomic here refers basically to the primitive float and int types. I have two problems:

  1. I get the warning "The assigned value of feature 'leftBracket' will possibly override itself because it is used inside of a loop" and the same for rightBracket. What does this mean in this context?
  2. The expression works only in standalone manner (in one row), but not in connection with the rest of the language elements. E.g. in connection with the element right before:

Comparison returns Expression:
Range ({Comparison.left=current} op=(">="|"<="|">"|"<"|"=>"|" <=>"|"xor"|"=") right=Range)*;

This means, if such an operation is before the Range element in my input of the second Eclipse window, I get the error "No viable alternative at input".

Any ideas? Thanks for any hints and advices!

Some more information: I took this example and changed it: https://github.com/LorenzoBettini/packtpub-xtext-book-examples/blob/master/org.example.expressions/src/org/example/expressions/Expressions.xtext

Full code:

grammar org.example.expressions.Expressions with org.eclipse.xtext.common.Terminals

generate expressions "http://www.example.org/expressions/Expressions"

ExpressionsModel:
    expressions+=Expression*;

Expression: Or;

Or returns Expression:
    And ({Or.left=current} "||" right=And)*
;

And returns Expression:
    Equality ({And.left=current} "&&" right=Equality)*
;

Equality returns Expression:
    Comparison (
        {Equality.left=current} op=("==")
        right=Comparison
    )*
;

Comparison returns Expression:
    Range ({Comparison.left=current} op=(">="|"<="|">"|"<"|"=>"|"<=>"|"xor"|"=") right=Range)*
;

Range returns Expression:
    Primary (leftBracket=('[' | ']') left=Primary '-'  right=Primary rightBracket=('[' | ']'))*
;

Primary returns Expression:
    '(' Expression ')' |
    {Not} "!" expression=Primary |
    Atomic
;

Atomic returns Expression:
    {IntConstant} value=INT |
    {StringConstant} value=STRING |
    {BoolConstant} value=('true'|'false')
;

Example where it fails: (1 = [1-2]) however [1-2] in a row works fine.

ANSWER

Answered 2017-Mar-23 at 17:21

i cannot really follow you but your grammar looks strange to me

Model:
    (expressions+=Comparison ";")*;
Comparison returns Expression:
    Range ({Comparison.left=current} op=(">=" | "<=" | ">" | "<" | "=>" | "<=>" | "xor" | "=") right=Range)*;
Range:
    (leftBracket=('[' | ']') left=Atomic '-' right=Atomic rightBracket=('[' | ']'))
    |
    Atomic;
Atomic:
    value=INT;

works fine with

[1-2];
]3-5[;
[1-4[ < ]1-6];
6;
1 < 2;

so can you give some more context

Source https://stackoverflow.com/questions/42981772

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install packtpub-xtext-book-examples

You can download it from GitHub.
You can use packtpub-xtext-book-examples like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the packtpub-xtext-book-examples component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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