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CHANGELOG
=========

6.2
---

 * Add support for `!php/enum` and `!php/enum *->value`
 * Deprecate the `!php/const:` tag in key which will be replaced by the `!php/const` tag (without the colon) since 3.4

6.1
---

 * In cases where it will likely improve readability, strings containing single quotes will be double-quoted

5.4
---

 * Add new `lint:yaml dirname --exclude=/dirname/foo.yaml --exclude=/dirname/bar.yaml`
   option to exclude one or more specific files from multiple file list
 * Allow negatable for the parse tags option with `--no-parse-tags`

5.3
---

 * Added `github` format support & autodetection to render errors as annotations
   when running the YAML linter command in a Github Action environment.

5.1.0
-----

 * Added support for parsing numbers prefixed with `0o` as octal numbers.
 * Deprecated support for parsing numbers starting with `0` as octal numbers. They will be parsed as strings as of Symfony 6.0. Prefix numbers with `0o`
   so that they are parsed as octal numbers.

   Before:

   ```yaml
   Yaml::parse('072');
   ```

   After:

   ```yaml
   Yaml::parse('0o72');
   ```

 * Added `yaml-lint` binary.
 * Deprecated using the `!php/object` and `!php/const` tags without a value.

5.0.0
-----

 * Removed support for mappings inside multi-line strings.
 * removed support for implicit STDIN usage in the `lint:yaml` command, use `lint:yaml -` (append a dash) instead to make it explicit.

4.4.0
-----

 * Added support for parsing the inline notation spanning multiple lines.
 * Added support to dump `null` as `~` by using the `Yaml::DUMP_NULL_AS_TILDE` flag.
 * deprecated accepting STDIN implicitly when using the `lint:yaml` command, use `lint:yaml -` (append a dash) instead to make it explicit.

4.3.0
-----

 * Using a mapping inside a multi-line string is deprecated and will throw a `ParseException` in 5.0.

4.2.0
-----

 * added support for multiple files or directories in `LintCommand`

4.0.0
-----

 * The behavior of the non-specific tag `!` is changed and now forces
   non-evaluating your values.
 * complex mappings will throw a `ParseException`
 * support for the comma as a group separator for floats has been dropped, use
   the underscore instead
 * support for the `!!php/object` tag has been dropped, use the `!php/object`
   tag instead
 * duplicate mapping keys throw a `ParseException`
 * non-string mapping keys throw a `ParseException`, use the `Yaml::PARSE_KEYS_AS_STRINGS`
   flag to cast them to strings
 * `%` at the beginning of an unquoted string throw a `ParseException`
 * mappings with a colon (`:`) that is not followed by a whitespace throw a
   `ParseException`
 * the `Dumper::setIndentation()` method has been removed
 * being able to pass boolean options to the `Yaml::parse()`, `Yaml::dump()`,
   `Parser::parse()`, and `Dumper::dump()` methods to configure the behavior of
   the parser and dumper is no longer supported, pass bitmask flags instead
 * the constructor arguments of the `Parser` class have been removed
 * the `Inline` class is internal and no longer part of the BC promise
 * removed support for the `!str` tag, use the `!!str` tag instead
 * added support for tagged scalars.

   ```yml
   Yaml::parse('!foo bar', Yaml::PARSE_CUSTOM_TAGS);
   // returns TaggedValue('foo', 'bar');
   ```

3.4.0
-----

 * added support for parsing YAML files using the `Yaml::parseFile()` or `Parser::parseFile()` method

 * the `Dumper`, `Parser`, and `Yaml` classes are marked as final

 * Deprecated the `!php/object:` tag which will be replaced by the
   `!php/object` tag (without the colon) in 4.0.

 * Deprecated the `!php/const:` tag which will be replaced by the
   `!php/const` tag (without the colon) in 4.0.

 * Support for the `!str` tag is deprecated, use the `!!str` tag instead.

 * Deprecated using the non-specific tag `!` as its behavior will change in 4.0.
   It will force non-evaluating your values in 4.0. Use plain integers or `!!float` instead.

3.3.0
-----

 * Starting an unquoted string with a question mark followed by a space is
   deprecated and will throw a `ParseException` in Symfony 4.0.

 * Deprecated support for implicitly parsing non-string mapping keys as strings.
   Mapping keys that are no strings will lead to a `ParseException` in Symfony
   4.0. Use quotes to opt-in for keys to be parsed as strings.

   Before:

   ```php
   $yaml = <<<YAML
   null: null key
   true: boolean true
   2.0: float key
   YAML;

   Yaml::parse($yaml);
   ```

   After:

   ```php

   $yaml = <<<YAML
   "null": null key
   "true": boolean true
   "2.0": float key
   YAML;

   Yaml::parse($yaml);
   ```

 * Omitted mapping values will be parsed as `null`.

 * Omitting the key of a mapping is deprecated and will throw a `ParseException` in Symfony 4.0.

 * Added support for dumping empty PHP arrays as YAML sequences:

   ```php
   Yaml::dump([], 0, 0, Yaml::DUMP_EMPTY_ARRAY_AS_SEQUENCE);
   ```

3.2.0
-----

 * Mappings with a colon (`:`) that is not followed by a whitespace are deprecated
   when the mapping key is not quoted and will lead to a `ParseException` in
   Symfony 4.0 (e.g. `foo:bar` must be `foo: bar`).

 * Added support for parsing PHP constants:

   ```php
   Yaml::parse('!php/const:PHP_INT_MAX', Yaml::PARSE_CONSTANT);
   ```

 * Support for silently ignoring duplicate mapping keys in YAML has been
   deprecated and will lead to a `ParseException` in Symfony 4.0.

3.1.0
-----

 * Added support to dump `stdClass` and `ArrayAccess` objects as YAML mappings
   through the `Yaml::DUMP_OBJECT_AS_MAP` flag.

 * Strings that are not UTF-8 encoded will be dumped as base64 encoded binary
   data.

 * Added support for dumping multi line strings as literal blocks.

 * Added support for parsing base64 encoded binary data when they are tagged
   with the `!!binary` tag.

 * Added support for parsing timestamps as `\DateTime` objects:

   ```php
   Yaml::parse('2001-12-15 21:59:43.10 -5', Yaml::PARSE_DATETIME);
   ```

 * `\DateTime` and `\DateTimeImmutable` objects are dumped as YAML timestamps.

 * Deprecated usage of `%` at the beginning of an unquoted string.

 * Added support for customizing the YAML parser behavior through an optional bit field:

   ```php
   Yaml::parse('{ "foo": "bar", "fiz": "cat" }', Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE | Yaml::PARSE_OBJECT | Yaml::PARSE_OBJECT_FOR_MAP);
   ```

 * Added support for customizing the dumped YAML string through an optional bit field:

   ```php
   Yaml::dump(['foo' => new A(), 'bar' => 1], 0, 0, Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE | Yaml::DUMP_OBJECT);
   ```

3.0.0
-----

 * Yaml::parse() now throws an exception when a blackslash is not escaped
   in double-quoted strings

2.8.0
-----

 * Deprecated usage of a colon in an unquoted mapping value
 * Deprecated usage of @, \`, | and > at the beginning of an unquoted string
 * When surrounding strings with double-quotes, you must now escape `\` characters. Not
   escaping those characters (when surrounded by double-quotes) is deprecated.

   Before:

   ```yml
   class: "Foo\Var"
   ```

   After:

   ```yml
   class: "Foo\\Var"
   ```

2.1.0
-----

 * Yaml::parse() does not evaluate loaded files as PHP files by default
   anymore (call Yaml::enablePhpParsing() to get back the old behavior)
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