private String fetchOptionalString()

in freemarker-docgen-core/src/main/java/org/freemarker/docgen/core/PrintTextWithDocgenSubstitutionsDirective.java [660:690]

• 31 lines of code
• 11 McCabe index (conditional complexity)

        private String fetchOptionalString() throws TemplateException {
            int savedCursor = cursor;
            skipWS();
            char quoteChar = charAt(cursor);
            boolean rawString = quoteChar == 'r';
            if (rawString) {
                if (cursor + 1 < text.length()) {
                    quoteChar = charAt(cursor + 1);
                }
            }
            if (quoteChar != '"' && quoteChar != '\'') {
                cursor = savedCursor;
                return null;
            }
            cursor += rawString ? 2 : 1;
            int stringStartIdx = cursor;
            while (cursor < text.length() && charAt(cursor) != quoteChar) {
                if (!rawString && charAt(cursor) == '\\') {
                    throw new DocgenTagException(
                            "Backslash is currently not supported in string literal in Docgen tags, "
                                    + "except in raw strings (like r\"regular\\s+expression\").", env);
                }
                cursor++;
            }
            if (charAt(cursor) != quoteChar) {
                throw new DocgenTagException("Unclosed string literal in a Docgen tag.", env);
            }
            String result = text.substring(stringStartIdx, cursor);
            cursor++;
            return result;
        }