protected String checkVariable()

in src/main/java/org/apache/commons/jexl3/parser/JexlParser.java [271:313]
39 lines of code
12 McCabe index (conditional complexity)

    protected String checkVariable(final ASTIdentifier identifier, final String name) {
        if (scope != null) {
            final Integer symbol = scope.getSymbol(name);
            if (symbol != null) {
                identifier.setLexical(scope.isLexical(symbol));
                boolean declared = true;
                if (scope.isCapturedSymbol(symbol)) {
                    // captured are declared in all cases
                    identifier.setCaptured(true);
                } else {
                    LexicalUnit unit = block;
                    declared = unit.hasSymbol(symbol);
                    // one of the lexical blocks above should declare it
                    if (!declared) {
                        for (final LexicalUnit u : blocks) {
                            if (u.hasSymbol(symbol)) {
                                unit = u;
                                declared = true;
                                break;
                            }
                        }
                    }
                    if (declared) {
                        // track if const is defined or not
                        if (unit.isConstant(symbol)) {
                            identifier.setConstant(true);
                        }
                    } else if (info instanceof JexlNode.Info) {
                        declared = isSymbolDeclared((JexlNode.Info) info, symbol);
                    }
                }
                identifier.setSymbol(symbol, name);
                if (!declared) {
                    if (getFeatures().isLexicalShade()) {
                        // cannot reuse a local as a global
                        throw new JexlException.Parsing(info, name + ": variable is not declared").clean();
                    }
                    identifier.setShaded(true);
                }
            }
        }
        return name;
    }