[#fmt-formatter-063]
= xref:fmt.adoc[fmt]::formatter<xref:folly/rich_error_base.adoc[folly::rich_error_base]>
:relfileprefix: ../
:mrdocs:

`fmt::format` support for `rich_error_base` and derived classes.

== Synopsis

Declared in `<folly/result/rich_error_base.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<>
struct formatter<xref:folly/rich_error_base.adoc[folly::rich_error_base]>;
----

== Description

`rich_error_base` AND derived classes are formattable.

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:fmt/formatter-063/format.adoc[`format`] 
| Formats `e` (with its epitaph stack) into the output of `ctx`.
| xref:fmt/formatter-063/parse.adoc[`parse`] 
| Parses the format spec (align/fill/padding is not yet supported).
|===


== Derived Classes

[cols="1,4"]
|===
| Name| Description
| xref:fmt/formatter-03.adoc[`formatter<T>`] 
| `fmt::format` support for any type convertible to `rich_error_base*`.
|===


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