Genrate warning when NTA not subclass of ASTNode

Create issue
Issue #280 resolved
Alfred Åkesson created an issue

Example following code will generate NullPointerException.

Ast:

A;

Jrag:

aspect Test {
    syn nta interfaceB A.getA();
    interface interfaceB {}
}

Generate a error insted.

Comments (2)

  1. Jesper Öqvist

    An error message for this error is already implemented in JastAdd, however it is never shown because JastAdd crashes while building the parent map:

    java.lang.NullPointerException
        at org.jastadd.ast.AST.Grammar.parentMap_compute(Grammar.java:2171)
        at org.jastadd.ast.AST.Grammar.parentMap(Grammar.java:2139)
        at org.jastadd.ast.AST.ASTDecl.parents_compute(ASTDecl.java:4574)
        at org.jastadd.ast.AST.ASTDecl.parents(ASTDecl.java:4562)
        at org.jastadd.ast.AST.ASTDecl.isRootNode(ASTDecl.java:4964)
        at org.jastadd.ast.AST.Grammar.roots_compute(Grammar.java:1986)
        at org.jastadd.ast.AST.Grammar.roots(Grammar.java:1972)
        at org.jastadd.ast.AST.Grammar.collect_contributors_Grammar_problems(Grammar.java:2479)
        at org.jastadd.ast.AST.Grammar.survey_Grammar_problems(Grammar.java:1575)
        at org.jastadd.ast.AST.Grammar.problems_compute(Grammar.java:2462)
        at org.jastadd.ast.AST.Grammar.problems(Grammar.java:2445)
        at org.jastadd.JastAdd.compile(JastAdd.java:210)
        at org.jastadd.JastAdd.compile(JastAdd.java:129)
        at org.jastadd.JastAdd.main(JastAdd.java:114)
    
  2. Jesper Öqvist

    Fix crash in parentMap computation

    The parentMap attribute would crash if the return type of a synthesized NTA declared in the abstract grammar was not an AST class.

    fixes #280 (bitbucket)

    → <<cset 7581c82f11a7>>

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