[#llvm-ImutKeyValueInfo]
= xref:llvm.adoc[llvm]::ImutKeyValueInfo
:relfileprefix: ../
:mrdocs:

Traits class used by ImmutableMap.

== Synopsis

Declared in `<llvm/ADT/ImmutableMap.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<
    typename T,
    typename S>
struct ImutKeyValueInfo;
----

== Description

While both the first and second elements in a pair are used to generate profile information, only the first element (the key) is used by isEqual and isLess.

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:llvm/ImutKeyValueInfo/data_type.adoc[`data_type`] 
| The type of a stored map value (second element of the pair).
| xref:llvm/ImutKeyValueInfo/data_type_ref.adoc[`data_type_ref`] 
| A reference to a map value.
| xref:llvm/ImutKeyValueInfo/key_type.adoc[`key_type`] 
| The key type used for ordering and equality.
| xref:llvm/ImutKeyValueInfo/key_type_ref.adoc[`key_type_ref`] 
| A reference to a map key.
| xref:llvm/ImutKeyValueInfo/value_type.adoc[`value_type`] 
| The type of a stored map entry (key and value pair).
| xref:llvm/ImutKeyValueInfo/value_type_ref.adoc[`value_type_ref`] 
| A reference to a stored map entry.
|===


== Static Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:llvm/ImutKeyValueInfo/DataOfValue.adoc[`DataOfValue`] 
| Returns the value (second element) of a stored map entry.
| xref:llvm/ImutKeyValueInfo/KeyOfValue.adoc[`KeyOfValue`] 
| Returns the key (first element) of a stored map entry.
| xref:llvm/ImutKeyValueInfo/Profile.adoc[`Profile`] 
| Adds profile data for a map entry to `ID,` using both key and value.
| xref:llvm/ImutKeyValueInfo/isDataEqual.adoc[`isDataEqual`] 
| Returns true if the stored values `L` and `R` are equal.
| xref:llvm/ImutKeyValueInfo/isEqual.adoc[`isEqual`] 
| Returns true if `L` and `R` are equal keys.
| xref:llvm/ImutKeyValueInfo/isLess.adoc[`isLess`] 
| Returns true if `L` is ordered before `R` in the tree.
|===



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