Make size_hint private

serde_core/src/de/impls.rs

@@ -8,7 +8,7 @@ use crate::private;
 use crate::seed::InPlaceSeed;
 
 #[cfg(any(feature = "std", feature = "alloc"))]
-use crate::de::size_hint;
+use crate::private::size_hint;
 
 ////////////////////////////////////////////////////////////////////////////////
 

serde_core/src/de/mod.rs

@@ -120,7 +120,6 @@ pub mod value;
 
 mod ignored_any;
 mod impls;
-pub mod size_hint;
 
 pub use self::ignored_any::IgnoredAny;
 pub use crate::seed::InPlaceSeed;

serde_core/src/de/size_hint.rs

@@ -1,33 +0,0 @@
-//! Provides helpers for creating size hints for container deserialization.
-#[cfg(any(feature = "std", feature = "alloc"))]
-use crate::lib::*;
-
-/// Extracts the exact size of an iterator if it has a known upper bound and it matches the lower bound.
-pub fn from_bounds<I>(iter: &I) -> Option<usize>
-where
-    I: Iterator,
-{
-    helper(iter.size_hint())
-}
-
-/// Returns conservative size estimate for a container, clamping the result to a maximum size.
-#[cfg(any(feature = "std", feature = "alloc"))]
-pub fn cautious<Element>(hint: Option<usize>) -> usize {
-    const MAX_PREALLOC_BYTES: usize = 1024 * 1024;
-
-    if mem::size_of::<Element>() == 0 {
-        0
-    } else {
-        cmp::min(
-            hint.unwrap_or(0),
-            MAX_PREALLOC_BYTES / mem::size_of::<Element>(),
-        )
-    }
-}
-
-fn helper(bounds: (usize, Option<usize>)) -> Option<usize> {
-    match bounds {
-        (lower, Some(upper)) if lower == upper => Some(upper),
-        _ => None,
-    }
-}

serde_core/src/de/value.rs

@@ -24,7 +24,8 @@
 use crate::lib::*;
 
 use self::private::{First, Second};
-use crate::de::{self, size_hint, Deserializer, Expected, IntoDeserializer, SeqAccess, Visitor};
+use crate::de::{self, Deserializer, Expected, IntoDeserializer, SeqAccess, Visitor};
+use crate::private::size_hint;
 use crate::ser;
 
 ////////////////////////////////////////////////////////////////////////////////