Minor refactor

codegen/src/attrs.rs

@@ -1,4 +1,7 @@
-use syn::{parse::ParseStream, parse::Parser, spanned::Spanned};
+use syn::{
+    parse::{ParseStream, Parser},
+    spanned::Spanned,
+};
 
 #[derive(Debug)]
 pub enum ExportScope {

codegen/src/function.rs

@@ -13,7 +13,10 @@ use std::format;
 use std::borrow::Cow;
 
 use quote::{quote, quote_spanned};
-use syn::{parse::Parse, parse::ParseStream, parse::Parser, spanned::Spanned};
+use syn::{
+    parse::{Parse, ParseStream, Parser},
+    spanned::Spanned,
+};
 
 use crate::attrs::{ExportInfo, ExportScope, ExportedParams};
 
@@ -360,7 +363,7 @@ impl Parse for ExportedFn {
             pass_context,
             return_dynamic,
             mut_receiver,
-            params: ExportedFnParams::default(),
+            params: Default::default(),
         })
     }
 }
@@ -466,13 +469,10 @@ impl ExportedFn {
         //
         // 1. Do not allow non-returning raw functions.
         //
-        if params.return_raw
-            && mem::discriminant(&self.signature.output)
-                == mem::discriminant(&syn::ReturnType::Default)
-        {
+        if params.return_raw && self.return_type().is_none() {
             return Err(syn::Error::new(
                 self.signature.span(),
-                "return_raw functions must return Result<T, Box<EvalAltResult>>",
+                "functions marked with 'return_raw' must return Result<Dynamic, Box<EvalAltResult>>",
             ));
         }
 
@@ -481,7 +481,7 @@ impl ExportedFn {
             FnSpecialAccess::Property(Property::Get(_)) if self.arg_count() != 1 => {
                 return Err(syn::Error::new(
                     self.signature.span(),
-                    "property getter requires exactly 1 argument",
+                    "property getter requires exactly 1 parameter",
                 ))
             }
             // 2b. Property getters must return a value.
@@ -495,7 +495,7 @@ impl ExportedFn {
             FnSpecialAccess::Property(Property::Set(_)) if self.arg_count() != 2 => {
                 return Err(syn::Error::new(
                     self.signature.span(),
-                    "property setter requires exactly 2 arguments",
+                    "property setter requires exactly 2 parameters",
                 ))
             }
             // 3b. Property setters must return nothing.
@@ -509,7 +509,7 @@ impl ExportedFn {
             FnSpecialAccess::Index(Index::Get) if self.arg_count() != 2 => {
                 return Err(syn::Error::new(
                     self.signature.span(),
-                    "index getter requires exactly 2 arguments",
+                    "index getter requires exactly 2 parameters",
                 ))
             }
             // 4b. Index getters must return a value.
@@ -523,7 +523,7 @@ impl ExportedFn {
             FnSpecialAccess::Index(Index::Set) if self.arg_count() != 3 => {
                 return Err(syn::Error::new(
                     self.signature.span(),
-                    "index setter requires exactly 3 arguments",
+                    "index setter requires exactly 3 parameters",
                 ))
             }
             // 5b. Index setters must return nothing.
@@ -593,19 +593,19 @@ impl ExportedFn {
         if self.params.return_raw {
             quote_spanned! { return_span=>
                 pub #dynamic_signature {
-                    super::#name(#(#arguments),*)
+                    #name(#(#arguments),*)
                 }
             }
         } else if self.return_dynamic {
             quote_spanned! { return_span=>
                 pub #dynamic_signature {
-                    Ok(super::#name(#(#arguments),*))
+                    Ok(#name(#(#arguments),*))
                 }
             }
         } else {
             quote_spanned! { return_span=>
                 pub #dynamic_signature {
-                    Ok(Dynamic::from(super::#name(#(#arguments),*)))
+                    Ok(Dynamic::from(#name(#(#arguments),*)))
                 }
             }
         }

codegen/src/test/function.rs

@@ -297,7 +297,7 @@ mod generate_tests {
                     Token().input_types()
                 }
                 pub fn dynamic_result_fn() -> Result<Dynamic, Box<EvalAltResult> > {
-                    Ok(Dynamic::from(super::do_nothing()))
+                    Ok(Dynamic::from(do_nothing()))
                 }
             }
         };
@@ -339,7 +339,7 @@ mod generate_tests {
                     Token().input_types()
                 }
                 pub fn dynamic_result_fn(x: usize) -> Result<Dynamic, Box<EvalAltResult> > {
-                    Ok(Dynamic::from(super::do_something(x)))
+                    Ok(Dynamic::from(do_something(x)))
                 }
             }
         };
@@ -381,7 +381,7 @@ mod generate_tests {
                     Token().input_types()
                 }
                 pub fn dynamic_result_fn(context: NativeCallContext, x: usize) -> Result<Dynamic, Box<EvalAltResult> > {
-                    Ok(Dynamic::from(super::do_something(context, x)))
+                    Ok(Dynamic::from(do_something(context, x)))
                 }
             }
         };
@@ -425,7 +425,7 @@ mod generate_tests {
                     Token().input_types()
                 }
                 pub fn dynamic_result_fn() -> Result<Dynamic, Box<EvalAltResult> > {
-                    Ok(super::return_dynamic())
+                    Ok(return_dynamic())
                 }
             }
         };
@@ -497,7 +497,7 @@ mod generate_tests {
                     Token().input_types()
                 }
                 pub fn dynamic_result_fn(x: usize, y: usize) -> Result<Dynamic, Box<EvalAltResult> > {
-                    Ok(Dynamic::from(super::add_together(x, y)))
+                    Ok(Dynamic::from(add_together(x, y)))
                 }
             }
         };
@@ -541,7 +541,7 @@ mod generate_tests {
                     Token().input_types()
                 }
                 pub fn dynamic_result_fn(x: &mut usize, y: usize) -> Result<Dynamic, Box<EvalAltResult> > {
-                    Ok(Dynamic::from(super::increment(x, y)))
+                    Ok(Dynamic::from(increment(x, y)))
                 }
             }
         };
@@ -584,7 +584,7 @@ mod generate_tests {
                     Token().input_types()
                 }
                 pub fn dynamic_result_fn(message: &str) -> Result<Dynamic, Box<EvalAltResult> > {
-                    Ok(Dynamic::from(super::special_print(message)))
+                    Ok(Dynamic::from(special_print(message)))
                 }
             }
         };

codegen/ui_tests/export_fn_raw_noreturn.stderr

@@ -1,4 +1,4 @@
-error: return_raw functions must return Result<T, Box<EvalAltResult>>
+error: functions marked with 'return_raw' must return Result<Dynamic, Box<EvalAltResult>>
   --> $DIR/export_fn_raw_noreturn.rs:10:5
    |
 10 | pub fn test_fn(input: &mut Point) {

codegen/ui_tests/export_mod_raw_noreturn.stderr

@@ -1,4 +1,4 @@
-error: return_raw functions must return Result<T, Box<EvalAltResult>>
+error: functions marked with 'return_raw' must return Result<Dynamic, Box<EvalAltResult>>
   --> $DIR/export_mod_raw_noreturn.rs:12:5
    |
 12 | pub fn test_fn(input: &mut Point) {

codegen/ui_tests/rhai_fn_getter_signature.stderr

@@ -1,4 +1,4 @@
-error: property getter requires exactly 1 argument
+error: property getter requires exactly 1 parameter
   --> $DIR/rhai_fn_getter_signature.rs:13:9
    |
 13 |     pub fn test_fn(input: Point, value: bool) -> bool {

codegen/ui_tests/rhai_fn_index_getter_signature.stderr

@@ -1,4 +1,4 @@
-error: index getter requires exactly 2 arguments
+error: index getter requires exactly 2 parameters
   --> $DIR/rhai_fn_index_getter_signature.rs:13:9
    |
 13 |     pub fn test_fn(input: Point) -> bool {

codegen/ui_tests/rhai_fn_setter_index_signature.stderr

@@ -1,4 +1,4 @@
-error: index setter requires exactly 3 arguments
+error: index setter requires exactly 3 parameters
   --> $DIR/rhai_fn_setter_index_signature.rs:13:9
    |
 13 |     pub fn test_fn(input: Point) -> bool {

codegen/ui_tests/rhai_fn_setter_signature.stderr

@@ -1,4 +1,4 @@
-error: property setter requires exactly 2 arguments
+error: property setter requires exactly 2 parameters
   --> $DIR/rhai_fn_setter_signature.rs:13:9
    |
 13 |     pub fn test_fn(input: Point) -> bool {