[antlr-interest] FW: CSharp Target...
Johannes Luber
JALuber at gmx.de
Mon Jun 16 15:40:04 PDT 2008
> In case you didn't see my thread from a little while back, I was having
> trouble with 3.1b1 until I rebuilt the java tool AND the .net assemblies
> it was generating code against (I am targeting CSharp2 and generating
> ASTs). I wasn't using the debug features, though. Personally I'd get a
> simple non-debug example working locally and then once you're sure your
> .net assemblies and grammar-generated code are valid and sufficient you
> can try fancier things.
>
> h
I've been notified that at least one bug vanishes once the library is rebuilt. Maybe that solves at least one of your problems.
Johannes
>
>
> Kris Erickson wrote:
> > First of all, let me state that Antlr appears to be an awesome tool.
> > AntlrWorks is amazing, being able to debug, combining the lexer and
> > parser, and having a parser for walking the trees. The Antlr book is
> > fantastic, the website is at time frustrating, but still and excellent
> > reference and the short period of time I have spent with the project has
> > made me start considering DSL's for all sorts of purposes. However,
> > trying to work in Csharp has been a bit of a nightmare.
> >
> > Initially I was trying to work in Antlr 3.1b1, but getting random errors
> > that simply did not occur when debugging the parser in Java (as well as
> > endless compile errors when even attempting to create a debug, but
> > compiling the "Simple tree-based interpreter" (the first one)
> > http://www.antlr.org/wiki/display/ANTLR3/Simple+tree-based+interpeter
> >
> > With the following changes:
> >
> > 4a5
> >
> >> language=CSharp2;
> >>
> > 13a15,18
> >
> >> @header {
> >> using System.Collections.Generic;
> >> }
> >>
> >>
> > 16c21
> > < List<CommonTree> functionDefinitions = new
> > ArrayList<CommonTree>();
> > ---
> >
> >> public List<CommonTree> functionDefinitions = new
> >> List<CommonTree>();
> >>
> > 32c37
> > < functionDefinitions.add($func.tree);
> > ---
> >
> >> functionDefinitions.Add($func.tree);
> >>
> > 68c73
> > < WS : (' '|'\t')+ { skip(); }
> > ---
> >
> >> WS : (' '|'\t')+ { Skip(); }
> >>
> >
> > Results in:
> >
> > C:\svnprojects\Expression\Expression>java org.antlr.Tool -debug Expr1.g
> > ANTLR Parser Generator Version 3.1b1 (May 20, 2008) 1989-2008
> > error(10): internal error: Expr1.g : java.util.NoSuchElementException:
> > no such attribute: n in template context [output File parser
> > genericParser(...) region__genericParser__members
> > region__genericParser__members if(grammar.grammarIsRoot)_s ubtemplate
> > else_subtemplate ctorForRootGrammar createListenerAndHandshake
> > if(PARSER)_subtemplate]
> > org.antlr.stringtemplate.StringTemplate.checkNullAttributeAgainstFormalA
> > rguments(StringTemplate.java:1290)
> > org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:814)
> > org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
> > org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
> > org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
> > org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
> > org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
> > org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
> > org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
> > org.antlr.stringtemplate.StringTemplate.get(StringTemplate.java:812)
> > org.antlr.stringtemplate.StringTemplate.getAttribute(StringTemplate.java
> > :696)
> > org.antlr.stringtemplate.language.ActionEvaluator.attribute(ActionEvalua
> > tor.java:360)
> > org.antlr.stringtemplate.language.ActionEvaluator.expr(ActionEvaluator.j
> > ava:136)
> > org.antlr.stringtemplate.language.ActionEvaluator.action(ActionEvaluator
> > .java:84)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:148)
> > org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
> > org.antlr.stringtemplate.language.ConditionalExpr.writeSubTemplate(Condi
> > tionalExpr.java:152)
> > org.antlr.stringtemplate.language.ConditionalExpr.write(ConditionalExpr.
> > java:103)
> > org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:715)
> > org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java:65
> > 2)
> > org.antlr.stringtemplate.language.ActionEvaluator.action(ActionEvaluator
> > .java:86)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:148)
> > org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:715)
> > org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java:65
> > 2)
> > org.antlr.stringtemplate.language.ActionEvaluator.action(ActionEvaluator
> > .java:86)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:148)
> > org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
> > org.antlr.stringtemplate.language.ConditionalExpr.write(ConditionalExpr.
> > java:126)
> > org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
> > org.antlr.stringtemplate.language.ConditionalExpr.writeSubTemplate(Condi
> > tionalExpr.java:152)
> > org.antlr.stringtemplate.language.ConditionalExpr.write(ConditionalExpr.
> > java:103)
> > org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:715)
> > org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java:65
> > 2)
> > org.antlr.stringtemplate.language.ActionEvaluator.action(ActionEvaluator
> > .java:86)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:148)
> > org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:715)
> > org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java:65
> > 2)
> > org.antlr.stringtemplate.language.ActionEvaluator.action(ActionEvaluator
> > .java:86)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:148)
> > org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:715)
> > org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java:65
> > 2)
> > org.antlr.stringtemplate.language.ActionEvaluator.action(ActionEvaluator
> > .java:86)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:148)
> > org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:715)
> > org.antlr.stringtemplate.language.ASTExpr.writeAttribute(ASTExpr.java:65
> > 2)
> > org.antlr.stringtemplate.language.ActionEvaluator.action(ActionEvaluator
> > .java:86)
> > org.antlr.stringtemplate.language.ASTExpr.write(ASTExpr.java:148)
> > org.antlr.stringtemplate.StringTemplate.write(StringTemplate.java:714)
> > org.antlr.codegen.CodeGenerator.write(CodeGenerator.java:1271)
> > org.antlr.codegen.Target.genRecognizerFile(Target.java:94)
> > org.antlr.codegen.CodeGenerator.genRecognizer(CodeGenerator.java:455)
> > org.antlr.Tool.generateRecognizer(Tool.java:419)
> > org.antlr.Tool.process(Tool.java:286)
> > org.antlr.Tool.main(Tool.java:71)
> >
> > C:\svnprojects\Expression\Expression>
> >
> > Turning off debug, it compiles but now when it runs, it gets a null
> > exception in Expr1Parser.cs
> >
> > char_literal19=(IToken)Match(input,13,FOLLOW_13_in_expr319);
> > char_literal19_tree = (CommonTree)adaptor.Create(char_literal19);
> > root_0 = (CommonTree)adaptor.BecomeRoot(char_literal19_tree, root_0);
> >
> > Because char_literal19 is null. Input looks good to me: {3+4\n}, so I
> > don't know why Match is returning null...
> >
> > Compiling with 3.0.1 works fine. So I think, great, I'll use 3.0.1,
> > however trying to run --debug with this. But I get the same error when
> > debugging any tree grammer:
> >
> > In the prog
> >
> > int LA1_0 = input.LA(1);
> >
> > Message: "Object reference is not set to an instance of an
> > object."
> > Source: "Antlr3.Rutime"
> > StackTrace: " at Antlr.Runtime.Debug.DebugTreeNodeStream.LA(Int32
> > i)\r\n at Eval1.prog() in
> > C:\\svnprojects\\Expression\\Expression2\\Eval1.cs:line 184\r\n at
> > ConsoleApplication1.Program.Main(String[] args) in
> > C:\\svnprojects\\Expression\\Expression2\\Program.cs:line 22\r\n at
> > System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)\r\n
> > at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence
> > assemblySecurity, String[] args)\r\n at
> > Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()\r\n
> > at System.Threading.ThreadHelper.ThreadStart_Context(Object state)\r\n
> > at System.Threading.ExecutionContext.Run(ExecutionContext
> > executionContext, ContextCallback callback, Object state)\r\n at
> > System.Threading.ThreadHelper.ThreadStart()"
> > TargetSite: {Int32 LA(Int32)}
> >
> > So, I was wondering:
> >
> > 1) Is there any version of Antlr with CSharp that run with debug (in the
> > tree grammar)?
> > 2) Where can I find the sources to the 3.0.1 CSharp runtime so I can
> > figure out why the DebugTreeNodeStream fails? I tried finding it at
> > FishEye but downloading the source from Aug 2007 results only in the
> > DLL's.
> > 3) Is there any examples of Antlr with CSharp for any projects that use
> > a Tree Grammar?
> > 4) If the 3.1.b1 is the only version of Antlr that supports the CSharp2
> > target, and the CSharp2
> > target is so broken it won't run against a simple grammar like the
> > "Simple Tree based interpreter",
> > should the all the Wiki examples point to the CSharp2 grammar? I
> > spent many hours thinking my
> > own grammar had some weird errors because I was getting NULL
> > exceptions only to find out that
> > the 3.1.b1 with CSharp2 is very broken.
> >
> > Kris
> >
> >
> >
>
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