Reduce usage of Default::default() to make it easier to refactor.

src/module/resolvers/collection.rs

@@ -20,7 +20,6 @@ use std::prelude::v1::*;
 /// let mut engine = Engine::new();
 /// engine.set_module_resolver(collection);
 /// ```
-#[derive(Default)]
 pub struct ModuleResolversCollection(Vec<Box<dyn ModuleResolver>>);
 
 impl ModuleResolversCollection {
@@ -43,7 +42,7 @@ impl ModuleResolversCollection {
     #[inline(always)]
     #[must_use]
     pub fn new() -> Self {
-        Default::default()
+        Self(Vec::new())
     }
     /// Append a [module resolver][ModuleResolver] to the end.
     #[inline(always)]

src/module/resolvers/file.rs

@@ -1,4 +1,4 @@
-use crate::{Engine, EvalAltResult, Identifier, Module, ModuleResolver, Position, Shared};
+use crate::{Engine, EvalAltResult, Identifier, Module, ModuleResolver, Position, Scope, Shared};
 #[cfg(feature = "no_std")]
 use std::prelude::v1::*;
 use std::{
@@ -51,13 +51,6 @@ pub struct FileModuleResolver {
     cache: std::sync::RwLock<BTreeMap<PathBuf, Shared<Module>>>,
 }
 
-impl Default for FileModuleResolver {
-    #[inline(always)]
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
 impl FileModuleResolver {
     /// Create a new [`FileModuleResolver`] with the current directory as base path.
     ///
@@ -301,7 +294,7 @@ impl ModuleResolver for FileModuleResolver {
         }
 
         // Load the script file and compile it
-        let scope = Default::default();
+        let scope = Scope::new();
 
         let mut ast = engine
             .compile_file(file_path.clone())

src/module/resolvers/stat.rs

@@ -22,7 +22,7 @@ use std::{collections::BTreeMap, ops::AddAssign};
 ///
 /// engine.set_module_resolver(resolver);
 /// ```
-#[derive(Debug, Clone, Default)]
+#[derive(Debug, Clone)]
 pub struct StaticModuleResolver(BTreeMap<Identifier, Shared<Module>>);
 
 impl StaticModuleResolver {
@@ -45,7 +45,7 @@ impl StaticModuleResolver {
     #[inline(always)]
     #[must_use]
     pub fn new() -> Self {
-        Default::default()
+        Self(BTreeMap::new())
     }
     /// Add a [module][Module] keyed by its path.
     #[inline]