From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 third_party/rust/litemap/src/serde_helpers.rs | 168 ++++++++++++++++++++++++++
 1 file changed, 168 insertions(+)
 create mode 100644 third_party/rust/litemap/src/serde_helpers.rs

(limited to 'third_party/rust/litemap/src/serde_helpers.rs')

diff --git a/third_party/rust/litemap/src/serde_helpers.rs b/third_party/rust/litemap/src/serde_helpers.rs
new file mode 100644
index 0000000000..b1ead938a0
--- /dev/null
+++ b/third_party/rust/litemap/src/serde_helpers.rs
@@ -0,0 +1,168 @@
+// This file is part of ICU4X. For terms of use, please see the file
+// called LICENSE at the top level of the ICU4X source tree
+// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
+
+// @@@@@@@@@@@@@@@@
+// THIS FILE IS SHARED BETWEEN LITEMAP AND ZEROVEC. PLEASE KEEP IT IN SYNC FOR ALL EDITS
+// @@@@@@@@@@@@@@@@
+
+use serde::ser::{Impossible, Serialize, Serializer};
+
+pub fn is_num_or_string<T: Serialize + ?Sized>(k: &T) -> bool {
+    // Serializer that errors in the same cases as serde_json::ser::MapKeySerializer
+    struct MapKeySerializerDryRun;
+    impl Serializer for MapKeySerializerDryRun {
+        type Ok = ();
+        // Singleton error type that implements serde::ser::Error
+        type Error = core::fmt::Error;
+
+        type SerializeSeq = Impossible<(), Self::Error>;
+        type SerializeTuple = Impossible<(), Self::Error>;
+        type SerializeTupleStruct = Impossible<(), Self::Error>;
+        type SerializeTupleVariant = Impossible<(), Self::Error>;
+        type SerializeMap = Impossible<(), Self::Error>;
+        type SerializeStruct = Impossible<(), Self::Error>;
+        type SerializeStructVariant = Impossible<(), Self::Error>;
+
+        fn serialize_str(self, _value: &str) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+        fn serialize_unit_variant(
+            self,
+            _name: &'static str,
+            _variant_index: u32,
+            _variant: &'static str,
+        ) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+        fn serialize_newtype_struct<T: Serialize + ?Sized>(
+            self,
+            _name: &'static str,
+            value: &T,
+        ) -> Result<Self::Ok, Self::Error> {
+            // Recurse
+            value.serialize(self)
+        }
+        fn serialize_bool(self, _value: bool) -> Result<Self::Ok, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_i8(self, _value: i8) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+        fn serialize_i16(self, _value: i16) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+        fn serialize_i32(self, _value: i32) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+        fn serialize_i64(self, _value: i64) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+        serde::serde_if_integer128! {
+            fn serialize_i128(self, _value: i128) -> Result<Self::Ok, Self::Error> {
+                Ok(())
+            }
+        }
+        fn serialize_u8(self, _value: u8) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+        fn serialize_u16(self, _value: u16) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+        fn serialize_u32(self, _value: u32) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+        fn serialize_u64(self, _value: u64) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+        serde::serde_if_integer128! {
+            fn serialize_u128(self, _value: u128) -> Result<Self::Ok, Self::Error> {
+                Ok(())
+            }
+        }
+        fn serialize_f32(self, _value: f32) -> Result<Self::Ok, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_f64(self, _value: f64) -> Result<Self::Ok, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_char(self, _value: char) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+        fn serialize_bytes(self, _value: &[u8]) -> Result<Self::Ok, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_newtype_variant<T: Serialize + ?Sized>(
+            self,
+            _name: &'static str,
+            _variant_index: u32,
+            _variant: &'static str,
+            _value: &T,
+        ) -> Result<Self::Ok, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_some<T: Serialize + ?Sized>(
+            self,
+            _value: &T,
+        ) -> Result<Self::Ok, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_tuple_struct(
+            self,
+            _name: &'static str,
+            _len: usize,
+        ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_tuple_variant(
+            self,
+            _name: &'static str,
+            _variant_index: u32,
+            _variant: &'static str,
+            _len: usize,
+        ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_struct(
+            self,
+            _name: &'static str,
+            _len: usize,
+        ) -> Result<Self::SerializeStruct, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn serialize_struct_variant(
+            self,
+            _name: &'static str,
+            _variant_index: u32,
+            _variant: &'static str,
+            _len: usize,
+        ) -> Result<Self::SerializeStructVariant, Self::Error> {
+            Err(core::fmt::Error)
+        }
+        fn collect_str<T: core::fmt::Display + ?Sized>(
+            self,
+            _value: &T,
+        ) -> Result<Self::Ok, Self::Error> {
+            Ok(())
+        }
+    }
+    k.serialize(MapKeySerializerDryRun).is_ok()
+}
-- 
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