StringSink visitFunctionType()

in lib/src/emitter.dart [437:481]

• 45 lines of code
• 10 McCabe index (conditional complexity)

  StringSink visitFunctionType(FunctionType spec, [StringSink? output]) {
    final out = output ??= StringBuffer();
    if (spec.returnType != null) {
      spec.returnType!.accept(this, out);
      out.write(' ');
    }
    out.write('Function');
    if (spec.types.isNotEmpty) {
      out.write('<');
      visitAll<Reference>(spec.types, out, (spec) {
        spec.accept(this, out);
      });
      out.write('>');
    }
    out.write('(');
    visitAll<Reference>(spec.requiredParameters, out, (spec) {
      spec.accept(this, out);
    });
    if (spec.requiredParameters.isNotEmpty &&
        (spec.optionalParameters.isNotEmpty ||
            spec.namedParameters.isNotEmpty)) {
      out.write(', ');
    }
    if (spec.optionalParameters.isNotEmpty) {
      out.write('[');
      visitAll<Reference>(spec.optionalParameters, out, (spec) {
        spec.accept(this, out);
      });
      out.write(']');
    } else if (spec.namedParameters.isNotEmpty) {
      out.write('{');
      visitAll<String>(spec.namedParameters.keys, out, (name) {
        spec.namedParameters[name]!.accept(this, out);
        out
          ..write(' ')
          ..write(name);
      });
      out.write('}');
    }
    out.write(')');
    if (_useNullSafetySyntax && (spec.isNullable ?? false)) {
      out.write('?');
    }
    return out;
  }