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minor #8200 Explained the explicit typing in YAML documents (javiereguiluz)
This PR was squashed before being merged into the 2.7 branch (closes #8200). Discussion ---------- Explained the explicit typing in YAML documents I was going to fix #8173 but I couldn't find the explicit typing explanation anywhere, so I include it here. ----- When merging this into 3.4, the `!str` tag must be changed by `!!tag` and we must add this: ``` .. versionadded:: 3.4 The support of ``!!str`` tag was introduced in Symfony 3.4. In previous versions you needed to use the ``!str`` tag. ``` Commits ------- aa1b968 Explained the explicit typing in YAML documents
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components/yaml/yaml_format.rst

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@@ -300,4 +300,22 @@ Comments can be added in YAML by prefixing them with a hash mark (``#``):
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Comments are simply ignored by the YAML parser and do not need to be
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indented according to the current level of nesting in a collection.
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Explicit Typing
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---------------
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The YAML specification defines some tags to set the type of any data explicitly:
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.. code-block:: yaml
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data:
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# this value is parsed as a float number (it will be 3.0 instead of 3)
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price: !!float 3
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# this value is parsed as binary data encoded in base64
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picture: !!binary |
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R0lGODlhDAAMAIQAAP//9/X
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17unp5WZmZgAAAOfn515eXv
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Pz7Y6OjuDg4J+fn5OTk6enp
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56enmleECcgggoBADs=
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.. _YAML: http://yaml.org/

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