patterns are experimental

ffi/capi/tests/missing_apis.txt

@@ -372,49 +372,6 @@ icu::normalizer::uts46::Uts46MapperBorrowed#Struct
 icu::normalizer::uts46::Uts46MapperBorrowed::map_normalize#FnInStruct
 icu::normalizer::uts46::Uts46MapperBorrowed::new#FnInStruct
 icu::normalizer::uts46::Uts46MapperBorrowed::normalize_validate#FnInStruct
-icu::pattern::DoublePlaceholder#Enum
-icu::pattern::DoublePlaceholderKey#Enum
-icu::pattern::DoublePlaceholderKey::from_str#FnInEnum
-icu::pattern::DoublePlaceholderKey::map_literal#FnInEnum
-icu::pattern::DoublePlaceholderKey::value_for#FnInEnum
-icu::pattern::DoublePlaceholderPattern#Typedef
-icu::pattern::Error#Enum
-icu::pattern::MissingNamedPlaceholderError#Struct
-icu::pattern::MissingNamedPlaceholderError::write_to#FnInStruct
-icu::pattern::MultiNamedPlaceholder#Enum
-icu::pattern::MultiNamedPlaceholderKey#Struct
-icu::pattern::MultiNamedPlaceholderKey::map_literal#FnInStruct
-icu::pattern::MultiNamedPlaceholderKey::value_for#FnInStruct
-icu::pattern::MultiNamedPlaceholderPattern#Typedef
-icu::pattern::ParsedPatternItem#Enum
-icu::pattern::Parser#Struct
-icu::pattern::Parser::new#FnInStruct
-icu::pattern::Parser::next#FnInStruct
-icu::pattern::Parser::try_collect_into_vec#FnInStruct
-icu::pattern::Parser::try_next#FnInStruct
-icu::pattern::ParserError#Enum
-icu::pattern::ParserOptions#Struct
-icu::pattern::Pattern#Struct
-icu::pattern::Pattern::interpolate#FnInStruct
-icu::pattern::Pattern::interpolate_to_string#FnInStruct
-icu::pattern::Pattern::iter#FnInStruct
-icu::pattern::Pattern::try_from_items#FnInStruct
-icu::pattern::Pattern::try_from_str#FnInStruct
-icu::pattern::Pattern::try_interpolate#FnInStruct
-icu::pattern::Pattern::try_interpolate_to_string#FnInStruct
-icu::pattern::PatternError#Enum
-icu::pattern::PatternItem#Enum
-icu::pattern::PatternItemCow#Enum
-icu::pattern::PatternString#Struct
-icu::pattern::PlaceholderValueProvider::map_literal#FnInTrait
-icu::pattern::PlaceholderValueProvider::value_for#FnInTrait
-icu::pattern::QuoteMode#Enum
-icu::pattern::SinglePlaceholder#Enum
-icu::pattern::SinglePlaceholderKey#Enum
-icu::pattern::SinglePlaceholderKey::from_str#FnInEnum
-icu::pattern::SinglePlaceholderKey::map_literal#FnInEnum
-icu::pattern::SinglePlaceholderKey::value_for#FnInEnum
-icu::pattern::SinglePlaceholderPattern#Typedef
 icu::plurals::PluralElements#Struct
 icu::plurals::PluralElements::as_ref#FnInStruct
 icu::plurals::PluralElements::explicit_one#FnInStruct

tools/make/diplomat-coverage/src/allowlist.rs

@@ -261,6 +261,8 @@ lazy_static::lazy_static! {
 
         "icu::experimental",
 
+        "icu::pattern",
+
         "icu::datetime::fields::components",
         "icu::datetime::fieldsets::serde",
         "icu::datetime::neo_pattern",