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There is an issue (gradle/gradle#820) with antlr plugin used in this project that leads to dependencies pollution.

A little bit strange, but the IDEA editor doesn't show any errors for the following code:

var b //must have assignment
func fun(){
    return //must return something
}

I have checked the same example in ANTLRv4 plugin and it shows 2 errors.

I have this code:

func f() {
    var s = "abc \n"
}

The problem is that "abc \n" is black (should be green because it is string). Problem appears if I use special symbols like \n.
When I set cursor before this string and then type backspace and space string is highlighted correctly.
However the parsing seems to be correctly in both cases.
Any ideas why this may happen?

Can not find SampleLanguageParser

Hello,

Today I have been trying to use this plugin to create a new language for a JetBrains product.
I however can't extend the plugin with new keywords.

I keep getting errors such as:

While the ANTLR preview works just fine:

I have tried to add a block keywords (e.g. 'class') that works very similar to a func definition:

script
	:	vardef* define_class* function* statement* EOF
	;

define_class
    : 'class' ID block
    ;

// ...

CLASS : 'class' ;

And I have tried to copy the print() definition to log(), which also leads to errors in the IDE (but not in the preview):

	|	'print' '(' expr? ')'								# Print
	|	'log' '(' expr? ')'								 # Log

// ...

PRINT : 'print' ;
LOG : 'log' ;

When replacing print with log, it does work:

I have tried editing and copying Java files/classes and cases/rules to match my new keywords, but this did not help at all.
What am I missing/supposed to be doing in order to create new keywords?

Hi, I tried run this project, and the compile phase seams to be well, but when running the program, this error appear:

[   8276]  ERROR - i.util.KeyedExtensionCollector - org/antlr/v4/runtime/Parser 
java.lang.NoClassDefFoundError: org/antlr/v4/runtime/Parser

I have set the path variable as the antlr official website says:

export CLASSPATH=".:/usr/local/lib/antlr-4.5.3-complete.jar    :$CLASSPATH"

Could anyone help me solving the problem?

Hello

Idea says me : CoreASTFactory is scheduled for removal in version 2020.3

It's possible to replace the class "CoreASTFactory" in the class SampleASTFactory ?

Thanks

I'm trying to use my Prolog grammar to build a jetbrains prolog plugin. I appended a rule ERRCHAR: . ->channel(HIDDEN); and rewrote/threw out all the "sample language" specific stuff, so I can run the IDE with my plugin. Opening a prolog file doesn't work, however, I see in idea.log this backtrace (repeatedly, with different origins):

2018-03-07 22:36:34,339 [ 451765]  ERROR - oncurrency.BoundedTaskExecutor - Unexpected termination offset for lexer org.antlr.jetbrains.adaptor.lexer.ANTLRLexerAdaptor@5dc85b57 
java.lang.IllegalStateException: Unexpected termination offset for lexer org.antlr.jetbrains.adaptor.lexer.ANTLRLexerAdaptor@5dc85b57
	at com.intellij.openapi.editor.ex.util.LexerEditorHighlighter.doSetText(LexerEditorHighlighter.java:394)
	at com.intellij.openapi.editor.ex.util.LexerEditorHighlighter.setText(LexerEditorHighlighter.java:360)
	at com.intellij.openapi.fileEditor.impl.text.AsyncHighlighterUpdater.performInReadAction(AsyncHighlighterUpdater.java:59)
	at com.intellij.openapi.progress.util.ReadTask.lambda$runBackgroundProcess$0(ReadTask.java:66)
	at com.intellij.openapi.application.ReadAction.compute(ReadAction.java:47)
	at com.intellij.openapi.progress.util.ReadTask.runBackgroundProcess(ReadTask.java:66)

Debugging shows me that the exception stems here https://github.com/JetBrains/intellij-community/blob/master/platform/editor-ui-ex/src/com/intellij/openapi/editor/ex/util/LexerEditorHighlighter.java#L394
because textLength (by the ANTLR lexer) is one bigger than mySegments.myEnds[last].

Has anybody else encountered a similar error? Is it a fault in my rewrite of the surrounding plugin files, or a bug somewhere else?
Would anybody be willing to look into the problem, if I publish the project so far?

IdentifierPSINode is a leaf node in your AST, and it implements PsiNamedElement.

It should not implement PsiNamedElement.

The Custom Language tutorial says

While the referencing element and the referenced element both may have a name, only the element which introduces the name (e.g., the definition int x = 42) needs to implement PsiNamedElement. The referencing element at the point of usage (e.g., the x in the expression x + 1) should not implement PsiNamedElement since it does not have a name.

I based my leaf node implementations on IdentifierPSINode, so I had my leaves implement PsiNamedElement. I just realized that this was causing a bug with "Find Usages". When searching for usages from a declaration, there were no results. Changing my leaves to not implement this interface fixed this problem.

Before I found this fix, I found the following workaround. I had my declaration be a reference to itself. In this case, "right-click -> Find Usages" works correctly, but "right-click -> Go To -> Declaration or Usages" does not. If there was only one usage, then the correct behavior would be to go to that usage. Instead, the behavior in this case is that the cursor moves to the beginning of the declaration (which is the current behavior for the current ANTLR plugin antlr/intellij-plugin-v4#580).

This commit antlr/antlr4-intellij-adaptor@57db94a

Broke (at least) this source file: /jetbrains-plugin-sample/src/java/org/antlr/jetbrains/sample/psi/VardefSubtree.java.

The constructor signature was changed.

It's very easy to get around this:

$ cd adaptor
$ git checkout 0f4e20755f8ae7fe5bec1e8f52ccefab42f33a87

But I think this repo should still be fixed because it took me a while to figure out.