Fix feature builds.

src/engine_settings.rs

@@ -1,13 +1,12 @@
 //! Configuration settings for [`Engine`].
 
-use crate::stdlib::{
-    format,
-    num::{NonZeroU64, NonZeroU8, NonZeroUsize},
-    string::String,
-};
+use crate::stdlib::{format, num::NonZeroU8, string::String};
 use crate::token::Token;
 use crate::Engine;
 
+#[cfg(not(feature = "unchecked"))]
+use crate::stdlib::num::{NonZeroU64, NonZeroUsize};
+
 #[cfg(not(feature = "no_module"))]
 use crate::stdlib::boxed::Box;
 

src/lib.rs

@@ -136,7 +136,7 @@ pub use utils::ImmutableString;
 use fn_native::Locked;
 
 #[cfg(feature = "internals")]
-pub use utils::{calc_native_fn_hash, calc_script_fn_hash};
+pub use utils::{calc_native_fn_hash, calc_script_fn_hash, HashableHashMap};
 
 #[cfg(not(feature = "internals"))]
 pub(crate) use utils::{calc_native_fn_hash, calc_script_fn_hash};
@@ -184,8 +184,7 @@ pub use token::{get_next_token, parse_string_literal, InputStream, Token, Tokeni
 #[cfg(feature = "internals")]
 #[deprecated = "this type is volatile and may change"]
 pub use ast::{
-    BinaryExpr, CustomExpr, Expr, FloatWrapper, FnCallExpr, HashableHashMap, Ident, ReturnType,
-    ScriptFnDef, Stmt,
+    BinaryExpr, CustomExpr, Expr, FloatWrapper, FnCallExpr, Ident, ReturnType, ScriptFnDef, Stmt,
 };
 
 #[cfg(feature = "internals")]

src/token.rs

@@ -1806,7 +1806,7 @@ impl Engine {
                 #[cfg(not(feature = "unchecked"))]
                 max_string_size: self.limits.max_string_size,
                 #[cfg(feature = "unchecked")]
-                max_string_size: 0,
+                max_string_size: None,
                 non_unary: false,
                 comment_level: 0,
                 end_with_none: false,

src/utils.rs

@@ -15,6 +15,7 @@ use crate::stdlib::{
     ops::{Add, AddAssign, Deref, DerefMut},
     str::FromStr,
     string::{String, ToString},
+    vec::Vec,
 };
 use crate::Shared;