Fix encapsulated environment in module functions.

src/eval/global_state.rs

@@ -5,6 +5,12 @@ use crate::{Engine, Identifier};
 use std::prelude::v1::*;
 use std::{fmt, marker::PhantomData};
 
+/// Collection of globally-defined constants.
+#[cfg(not(feature = "no_module"))]
+#[cfg(not(feature = "no_function"))]
+pub type GlobalConstants =
+    crate::Shared<crate::Locked<std::collections::BTreeMap<Identifier, crate::Dynamic>>>;
+
 /// _(internals)_ Global runtime states.
 /// Exported under the `internals` feature only.
 //
@@ -44,9 +50,7 @@ pub struct GlobalRuntimeState<'a> {
     /// Interior mutability is needed because it is shared in order to aid in cloning.
     #[cfg(not(feature = "no_module"))]
     #[cfg(not(feature = "no_function"))]
-    pub(crate) constants: Option<
-        crate::Shared<crate::Locked<std::collections::BTreeMap<Identifier, crate::Dynamic>>>,
-    >,
+    pub(crate) constants: Option<GlobalConstants>,
     /// Debugging interface.
     #[cfg(feature = "debugging")]
     pub debugger: super::Debugger,

src/eval/mod.rs

@@ -17,5 +17,8 @@ pub use debugger::CallStackFrame;
 pub use debugger::{BreakPoint, Debugger, DebuggerCommand, OnDebuggerCallback, OnDebuggingInit};
 pub use eval_context::EvalContext;
 pub use eval_state::EvalState;
+#[cfg(not(feature = "no_module"))]
+#[cfg(not(feature = "no_function"))]
+pub use global_state::GlobalConstants;
 pub use global_state::GlobalRuntimeState;
 pub use target::{calc_index, calc_offset_len, Target};