[e-lang] AST view of E program

["Marcelo D. Ré"]

Kevin Reid escribió:
> On Sep 29, 2008, at 7:49, Marcelo D. Ré wrote:
>
>   
>>    I am working in a module to support E in NetBeans. Currently it
>> sopport code highlight, braces completion, run e from the ide, and are
>> developping the syntax check.
>>    The question is: how to grab an AST from an E file? is it posible?
>>     
>
>    def makeEParser := <import:org.erights.e.elang.syntax.makeEParser>
>
>    makeEParser.run(theFile.getTwine())
>
> The result of this is an AST of type ENode.
>
> All of this can be accessed from Java too.
>
> There is one caveat: in E-on-Java, there is no reified AST for un- 
> expanded E syntax, only for Kernel-E. This may be sufficient,  
> particularly as, provided that the source is a Twine (not a String),  
> every ENode carries the line and column number of the source text  
> corresponding to it (getOptSpan).
>
>
> If it isn't, you can supply your own EBuilder (or is it ENodeBuilder?  
> One's a class and the other's an interface) to EParser and get  
> messages corresponding to the full syntax.
>
> Another option is to use the grammar from E-on-CL, which is actually  
> written in Java (generated by ANTLR), which provides an unexpanded AST.
>
>   
>> I have problem parsing the line
>>
>>              match [] { println(uri) }
>>
>>    in the counter-example.e.
>>
>>    I don't find a clause that parse the "println" statement.
>>     
>
>
> This is an ordinary function call. The Kernel-E AST for this is
>
> EMatcher
>    ListPattern
>      (no children)
>    CallExpr
>      NounExpr
>        "println"
>      "run"
>      NounExpr
>        "uri"
>
> The unexpanded AST for this in E-on-CL is
>
> EMatcher
>    ListPattern
>      (no children)
>    FunCallExpr
>      NounExpr
>        "println"
>      NounExpr
>        "uri"
>
>   
Hi

    I have problem to print the AST. I couldn't find the way to do this. 
Where is the class or method makeEParse? I didn't find it in the JavaDoc 
(http://www.erights.org/javadoc/index.html) son I could modify the 
program to print the AST.
    I try diferent ways but could not get it work. Could somebody help 
me? I need a program that print the on console AST view of a source.
    I have most of the syntax check working in my plugin but currently 
have a problem parsing the expresion:

    def x4k3 := (x10 * 4).keep(3)
   
    of the diceIt.e

    Thank

       Marcelo



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