Is there a way to disable some features from SnakeYaml

(by @exbe https://github.com/FasterXML/jackson-dataformat-yaml/issues/85)

SnakeYaml converts some string values into Boolean while resolving input (link)

 public static final Pattern BOOL = Pattern.compile("^(?:yes|Yes|YES|no|No|NO|true|True|TRUE|false|False|FALSE|on|On|ON|off|Off|OFF)$");

While it is useful feature, some yamls might be converted with wrong value. Think about country code “NO”, which is Norway.

Is there a way to disable or have better control over this with YamlParser features?

PS Workaround is simple, just surround value with quotes, e.g.

countries:
    - AU
    - "NO"
    - MOON

[asomov]

@jeff-miller-cfa I think it should be only true|false (this is also the default in snakeyaml-engine now)

[jeff-miller-cfa]

a workaround to this is to create a custom Resolver then override the addImplicitResolver method like below:

new Resolver() {
        @Override public void addImplicitResolver(Tag tag, Pattern regexp, String first) {
            if (tag.equals(Tag.BOOL)) {
                regexp = Pattern.compile("^(?:true|True|TRUE|false|False|FALSE)$");
                first = "tTfF";
            }
            super.addImplicitResolver(tag, regexp, first);
        }
    }