Make log dependency optional, keep it in default features

Cargo.toml

@@ -52,7 +52,7 @@ hashbrown = { version = "0.15", optional = true }
 parking_lot = { version = "0.12", optional = true }
 regex = { version = "1.12.3", optional = true }
 vec64 = { version = "0.4.7" }
-log = "0.4.29"
+log = { version = "0.4.29", optional = true }
 
 [dev-dependencies]
 criterion = { version = "0.8.2", features = ["html_reports"] }
@@ -65,6 +65,9 @@ libc = "0.2"
 
 [features]
 
+# Enables logging output via the log crate. When disabled, warnings fall back to eprintln!
+log = ["dep:log"]
+
 # Adds parallel iterators via `Rayon`
 parallel_proc = ["rayon"]
 
@@ -312,6 +315,7 @@ default = [
     "large_string",
     "simd",
     "select",
+    "log"
 ]
 
 [package.metadata.cargo-all-features]

src/lib.rs

@@ -262,6 +262,7 @@ pub mod traits {
 
 pub mod aliases;
 pub mod conversions;
+pub mod log;
 pub mod macros;
 pub mod utils;
 

src/log.rs

@@ -0,0 +1,14 @@
+// Conditional logging support: uses log crate when enabled, eprintln fallback when disabled.
+
+#[cfg(feature = "log")]
+pub use log::warn;
+
+#[cfg(not(feature = "log"))]
+macro_rules! warn_fallback {
+    ($($arg:tt)*) => {
+        eprintln!($($arg)*)
+    };
+}
+
+#[cfg(not(feature = "log"))]
+pub(crate) use warn_fallback as warn;

src/structs/buffer.rs

@@ -81,7 +81,7 @@ use std::fmt::{Display, Formatter};
 use std::ops::{Deref, DerefMut, RangeBounds};
 use std::{fmt, mem};
 
-use log::warn;
+use crate::log::warn;
 
 use crate::Vec64;
 #[cfg(feature = "lbuffer")]

src/structs/table.rs

@@ -35,7 +35,7 @@ use std::sync::atomic::{AtomicUsize, Ordering};
 
 #[cfg(feature = "cast_arrow")]
 use arrow::array::RecordBatch;
-use log::warn;
+use crate::log::warn;
 #[cfg(feature = "cast_polars")]
 use polars::frame::DataFrame;
 #[cfg(feature = "cast_polars")]