[antlr-interest] Objective-C target problem no createTree:
Alan Condit
acondit at ipns.com
Sat Aug 6 12:55:46 PDT 2011
Rod,
From what you wrote I don't see the problem. There is not '-createTree:' there is a '-create:(id<ANTLRToken>)payload' in ANTLRBaseTreeAdaptor.h.
Alan
On Aug 6, 2011, at 12:00 PM, antlr-interest-request at antlr.org wrote:
> From: Rod Schmidt <rod at infinitenil.com>
> Date: August 5, 2011 8:30:40 PM PDT
> To: antlr-interest at antlr.org
> Subject: [antlr-interest] Objective-C target problem no createTree:
>
>
> I'm using the latest antlr-3.4.jar to generate an ObjC target. The target is generated but I'm not sure it's correct. When I build I get the following warning (among others):
>
> file://localhost/Users/rod/Desktop/Merlin/objc-impl/Merlin/Merlin/MerlinParser.m: warning: Semantic Issue: Instance method '-createTree:' not found (return type defaults to 'id')
>
> I'm on Mac OS X Lion and using XCode 4.1. I've also downloaded the source to the Objective-C runtime, etc., and there is not a createTree: method. There are methods such as createTree:text:, etc. but no just createTree:
>
> So at this point, I wondering. Is there a bug in the 3.4 (i.e. the templates are not correct), or am I just not setup right? Or is there something wrong with my grammar file? Here it is:
>
> grammar Merlin;
>
> options {
> language = ObjC;
> output = AST;
>
> // ANTLR can handle literally any tree node type.
> // For convenience, specify the Java type
> ASTLabelType = ANTLRCommonTree; // type of $stat.tree ref etc.
> }
>
> @memVars {
> // Map variable name to Integer object holding value
> NSMutableDictionary *memory;
> }
>
> @init {
> memory = [[NSMutableDictionary alloc] init];
> }
>
> /** Match a series of stat rules and, for each one, print out the
> * tree stat returns, $stat.tree. toStringTree() prints the tree
> * out in form: (root child1 .. childN). ANTLR's default tree
> * construction mechanism will build a list (flat tree) of the stat
> * result trees. This tree will be the input to the tree parser.
> */
> prog : ( stat { NSLog(@"\%@", $stat.tree == nil ? @"null" : [$stat.tree toStringTree]); } )+ ;
>
> stat : expr NEWLINE -> expr
> | ID '=' expr NEWLINE -> ^('=' ID expr)
> | NEWLINE ->
> ;
>
> expr : multExpr (('+'^ | '-'^) multExpr)*
> ;
>
> multExpr: atom ('*'^ atom)*
> ;
>
> atom : INT
> | ID
> | '('! expr ')'!
> ;
>
> ID : ('a'..'z' | 'A'..'Z')+ ;
> INT : '0'..'9'+ ;
> NEWLINE : '\r'? '\n' ;
> WS : (' '|'\t')+ { [self skip]; } ;
>
> If I take out the rewrite rules (i.e. all the AST generate stuff) and just use Objective-C code actions it works fine (lots of warnings though in the generated code).
>
> If anybody could shed some light on this, I would very much appreciate it. Otherwise I'll have to try a C target or another tool besides ANTLR, which I'd rather not do since ANTLR seems like the best tool out there.
>
> Thanks,
>
> Rod Schmidt
> www.infinitenil.com
---
Alan Condit
1085 Tierra Ct.
Woodburn, OR 97071
Email -- acondit at ipns.com
Home-Office (503) 982-0906
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