private CompiledFEELUnaryTests parse(String input, Map<String, Type> inputTypes, FEELEventListenersManager mgr, CompiledFEELSupport.SyntaxErrorListener listener) { FEEL_1_1Parser parser = FEELParser.parse(mgr, input, inputTypes, Collections.emptyMap(), Collections.emptyList(), Collections.emptyList()); ParseTree tree = parser.unaryTestsRoot(); DirectCompilerResult directResult; if (listener.isError()) { directResult = CompiledFEELSupport.compiledErrorUnaryTest(listener.event().getMessage()); } else { ASTBuilderVisitor v = new ASTBuilderVisitor(inputTypes); BaseNode node = v.visit(tree); BaseNode transformed = node.accept(new ASTUnaryTestTransform()).node(); directResult = transformed.accept(new ASTCompilerVisitor()); } Expression expr = directResult.getExpression(); CompiledFEELUnaryTests cu = new CompilerBytecodeLoader().makeFromJPUnaryTestsExpression(input, expr, directResult.getFieldDeclarations()); return cu; }