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Diffstat (limited to 'llvm/docs')
| -rw-r--r-- | llvm/docs/YamlIO.rst | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/llvm/docs/YamlIO.rst b/llvm/docs/YamlIO.rst index 79e07cd9897..3ecd03afb24 100644 --- a/llvm/docs/YamlIO.rst +++ b/llvm/docs/YamlIO.rst @@ -633,6 +633,20 @@ This works for both reading and writing. For example: }; +Tags +---- + +The YAML syntax supports tags as a way to specify the type of a node before +it is parsed. This allows dynamic types of nodes. But the YAML I/O model uses +static typing, so there are limits to how you can use tags with the YAML I/O +model. Recently, we added support to YAML I/O for checking/setting the optional +tag on a map. Using this functionality it is even possbile to support differnt +mappings, as long as they are convertable. + +To check a tag, inside your mapping() method you can use io.mapTag() to specify +what the tag should be. This will also add that tag when writing yaml. + + Sequence ======== |
