feat(src): Add real and working support for results

Every `Result` is now -- on demand -- instantiated (i.e. the generic types
are replaced with the concretely specified ones). And can thus simply be
exported to c.

src/macros/generate/convert/auxiliary/c/enumeration/mod.rs

@@ -25,7 +25,7 @@ use crate::parser::command_spec::{Attribute, DocIdentifier, Enumeration};
 impl Enumeration {
     pub fn to_auxiliary_c(&self) -> String {
         let doc_comments: String = Attribute::to_auxiliary_c_merged(&self.attributes);
-        let ident = &self.identifier.to_auxiliary_c();
+        let ident = &self.identifier.to_auxiliary_c(&[]);
         let states = self
             .states
             .iter()

src/macros/generate/convert/auxiliary/c/identifier/mod.rs

@@ -24,15 +24,12 @@ use convert_case::{Case, Casing};
 use proc_macro2::TokenStream as TokenStream2;
 use quote::quote;
 
-use crate::parser::command_spec::{Identifier, Variant};
+use crate::parser::command_spec::{Identifier, Type, Variant};
 
 mod doc_identifier;
 
-//
-// pub use doc_identifier::*;
-
 impl Identifier {
-    pub fn to_auxiliary_c(&self) -> TokenStream2 {
+    pub fn to_auxiliary_c(&self, generic_args: &[Type]) -> TokenStream2 {
         let ident = self.to_rust_pascalized();
         match &self.variant {
             Variant::Structure { .. } => {
@@ -46,6 +43,13 @@ impl Identifier {
                     enum #ident
                 }
             }
+            Variant::Result { .. } => {
+                let ident = Type::mangle_result_name(generic_args);
+                quote! {
+                    struct #ident
+                }
+            }
+
             Variant::Primitive => match self.name.to_case(Case::Snake).as_str() {
                 "string" => {
                     quote! {
@@ -65,14 +69,15 @@ impl Identifier {
                 // Float
                 "f_32" => quote! { float },
                 "f_64" => quote! { double },
-                // Other (not yet imlemented)
+
+                // Others (not yet imlemented)
                 // ("Option", 1),
                 // ("Vec", 1),
-                // ("Result", 2),
                 other => {
                     todo!("'{}' is not yet supported", other)
                 }
             },
+
             other => {
                 unimplemented!("{:#?}", other)
             }

src/macros/generate/convert/auxiliary/c/namespace/mod.rs

@@ -24,7 +24,7 @@ use proc_macro2::TokenStream as TokenStream2;
 use quote::{format_ident, quote};
 
 use crate::parser::command_spec::{
-    Attribute, Enumeration, Function, Identifier, Namespace, Structure,
+    Attribute, Enumeration, Function, Identifier, Namespace, Structure, Type,
 };
 
 impl Namespace {
@@ -44,6 +44,12 @@ impl Namespace {
             .map(Enumeration::to_auxiliary_c)
             .collect::<Vec<String>>()
             .join("\n");
+        let results: String = self
+            .select_types_pred(|(ident, _generics)| ident.name.as_str() == "Result")
+            .iter()
+            .map(|(_, generics)| Type::to_auxilary_c_result(generics).to_string())
+            .collect::<Vec<String>>()
+            .join("\n");
         let functions: String = self
             .functions
             .iter()
@@ -56,7 +62,7 @@ impl Namespace {
             .map(|nasp| nasp.to_auxiliary_c(&nasps))
             .collect();
 
-        format! {"{}\n{}\n{}\n{}", enumerations, structures, functions, namespaces}
+        format! {"{}\n{}\n{}\n{}\n{}", enumerations, structures, results, functions, namespaces}
     }
 
     pub fn to_auxiliary_c_full_struct_init(&self, namespaces: &Vec<&Identifier>) -> TokenStream2 {

src/macros/generate/convert/auxiliary/c/structure/mod.rs

@@ -25,7 +25,7 @@ use crate::parser::command_spec::{Attribute, DocNamedType, Structure};
 impl Structure {
     pub fn to_auxiliary_c(&self) -> String {
         let doc_comments: String = Attribute::to_auxiliary_c_merged(&self.attributes);
-        let ident = self.identifier.to_auxiliary_c();
+        let ident = self.identifier.to_auxiliary_c(&[]);
         let contents = self
             .contents
             .iter()

src/macros/generate/convert/auxiliary/c/type/mod.rs

@@ -36,9 +36,9 @@ impl Type {
         match self {
             Type::Typical {
                 identifier,
-                generic_args: _,
+                generic_args,
             } => {
-                let ident = identifier.to_auxiliary_c();
+                let ident = identifier.to_auxiliary_c(generic_args);
                 let output = if is_output {
                     quote! {
                         *
@@ -78,4 +78,21 @@ impl Type {
             }
         }
     }
+
+    pub fn to_auxilary_c_result(generic_args: &[Type]) -> TokenStream2 {
+        let ident = Type::mangle_result_name(&generic_args);
+
+        let generic_one = generic_args[0].to_auxiliary_c(false, None);
+        let generic_two = generic_args[1].to_auxiliary_c(false, None);
+
+        quote! {
+            struct #ident {
+              enum ResultTag tag;
+              union {
+                #generic_one ok;
+                #generic_two err;
+              } value;
+            };
+        }
+    }
 }

src/macros/generate/convert/host/c/namespace/mod.rs

@@ -20,12 +20,14 @@
 * If not, see <https://www.gnu.org/licenses/>.
 */
 
+use std::iter;
+
 use proc_macro2::TokenStream as TokenStream2;
 use quote::{format_ident, quote};
 
 use crate::{
     macros::config::trixy::TrixyConfig,
-    parser::command_spec::{Enumeration, Identifier, Namespace, Structure},
+    parser::command_spec::{Enumeration, Identifier, Namespace, Structure, Type},
 };
 
 impl Namespace {
@@ -48,11 +50,20 @@ impl Namespace {
         let enumerations: TokenStream2 = self.enumerations.iter().map(Enumeration::to_c).collect();
 
         let callback_function = format_ident!("{}", config.callback_function);
+
+        let all_results_types: TokenStream2 = self
+            .select_types_pred(|(identifier, _generic_args)| identifier.name.as_str() == "Result")
+            .iter()
+            .map(|(_, generics)| Type::to_c_result(&generics))
+            .collect();
+
         quote! {
             pub mod #ident {
                 #[allow(unused_imports)]
                 use crate :: #callback_function;
 
+                #all_results_types
+
                 #enumerations
                 #structures
                 #additional_functions
@@ -60,4 +71,81 @@ impl Namespace {
             #functions
         }
     }
+
+    /// Get all the types used in this namespaces that conform to the predicate.
+    /// The predicate get's the identifier of a type and the generic arguments passed.
+    pub fn select_types_pred(
+        &self,
+        pred: fn(&(Identifier, Vec<Type>)) -> bool,
+    ) -> Vec<(Identifier, Vec<Type>)> {
+        fn filter_type(ty: &Type) -> Vec<(Identifier, Vec<Type>)> {
+            match ty {
+                Type::Typical {
+                    identifier,
+                    generic_args,
+                } => {
+                    let mut output = vec![];
+                    output.extend(generic_args.iter().map(|ga| filter_type(ga)).flatten());
+                    output.push((identifier.to_owned(), generic_args.to_owned()));
+                    // Stop recursion and return
+                    output
+                }
+                Type::Function { inputs, output } => {
+                    let mut full_output = vec![];
+                    full_output.extend(
+                        inputs
+                            .iter()
+                            .map(|na| &na.r#type)
+                            .map(|ty| filter_type(&ty))
+                            .flatten(),
+                    );
+
+                    if let Some(out) = output {
+                        full_output.extend(filter_type(out))
+                    }
+
+                    full_output
+                }
+            }
+        }
+
+        let all_types = self.collect_types();
+
+        let all_result_types: Vec<_> = all_types
+            .iter()
+            .map(|r#type| filter_type(r#type))
+            .flatten()
+            .filter(pred)
+            .collect();
+
+        all_result_types
+    }
+
+    /// Collect a vector of all types used in this namespace
+    pub fn collect_types(&self) -> Vec<Type> {
+        let structures_types = self
+            .structures
+            .iter()
+            .map(|st| st.contents.iter().map(|dc| dc.r#type.clone()))
+            .flatten();
+
+        self.functions
+            .iter()
+            .map(|r#fn| {
+                r#fn.inputs
+                    .iter()
+                    .map(|nt| Some(nt.r#type.clone()))
+                    .chain({
+                        if let Some(output) = &r#fn.output {
+                            iter::once(Some(output.clone()))
+                        } else {
+                            iter::once(None)
+                        }
+                    })
+                    .filter_map(|x| x)
+            })
+            .flatten()
+            .chain(structures_types)
+            .collect()
+    }
 }

src/macros/generate/convert/host/c/type/mod.rs

@@ -21,7 +21,8 @@
 */
 
 use proc_macro2::TokenStream as TokenStream2;
-use quote::quote;
+use quote::{format_ident, quote};
+use syn::Ident;
 
 use crate::parser::command_spec::{Identifier, NamedType, Type};
 
@@ -39,10 +40,84 @@ impl Type {
         }
     }
 
+    pub fn mangle_result_name(generic_args: &[Type]) -> Ident {
+        assert_eq!(generic_args.len(), 2);
+
+        format_ident!(
+            "result_{}_{}",
+            generic_args[0].to_string(),
+            generic_args[1].to_string()
+        )
+    }
+
     pub fn to_c_function(inputs: &[NamedType], output: &Option<Box<Type>>) -> TokenStream2 {
         Type::to_rust_function(&inputs, &output)
     }
 
+    pub fn to_c_result(generic_args: &[Type]) -> TokenStream2 {
+        assert_eq!(generic_args.len(), 2);
+        let first_generic = generic_args[0].to_c();
+        let second_generic = generic_args[1].to_c();
+
+        let ident = Type::mangle_result_name(&generic_args);
+        let value_ident = format_ident!("{}_value", ident);
+
+        quote! {
+            #[allow(non_camel_case_types)]
+            #[repr(C)]
+            pub union #value_ident {
+               ok: std::mem::ManuallyDrop<#first_generic>,
+               err: std::mem::ManuallyDrop<#second_generic>,
+            }
+
+            #[allow(non_camel_case_types)]
+            #[repr(C)]
+            pub struct #ident {
+                tag: trixy::types::ResultTag,
+                value: #value_ident,
+            }
+
+            impl std::fmt::Debug for #ident {
+                fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+                    match self.tag {
+                        trixy::types::ResultTag::Ok => write!(f, "{:?}", unsafe { &self.value.ok }),
+                        trixy::types::ResultTag::Err => write!(f, "{:?}", unsafe { &self.value.err }),
+                    }
+                }
+            }
+
+
+            impl trixy::types::traits::convert_trait::Convertible
+                for crate::OurResult<#first_generic, #second_generic>
+            {
+                type Ptr = #ident;
+
+                fn into_ptr(self) -> Self::Ptr {
+                    if self.value.is_ok() {
+                        Self::Ptr {
+                            tag: trixy::types::ResultTag::Ok,
+                            value: #value_ident {
+                                ok: std::mem::ManuallyDrop::new(self.value.expect("Is ok")),
+                            },
+                        }
+                    } else {
+                        Self::Ptr {
+                            tag: trixy::types::ResultTag::Err,
+                            value: #value_ident {
+                                err: std::mem::ManuallyDrop::new(self.value.expect_err("Is err")),
+                            },
+                        }
+                    }
+                }
+
+                fn from_ptr(_ptr: Self::Ptr) -> Result<Self, trixy::types::error::TypeConversionError> {
+                    unreachable!("This should probably not be called?");
+                }
+            }
+
+        }
+    }
+
     fn to_c_typical(identifier: &Identifier, generic_args: &Vec<Type>) -> TokenStream2 {
         let trixy_build_in_types: Vec<&str> = crate::types::BASE_TYPES
             .iter()
@@ -75,7 +150,7 @@ impl Type {
                 #nasp_path #ident
             }
         } else {
-            debug_assert_eq!(trixy_build_in_types.len(), 1);
+            assert_eq!(trixy_build_in_types.len(), 1);
 
             let type_name = trixy_build_in_types
                 .first()
@@ -83,11 +158,28 @@ impl Type {
 
             match *type_name {
                 "Result" => {
-                    let ident_ok = &generic_args.first().expect("This is a result").to_c();
-                    let ident_err = &generic_args.last().expect("This is a result").to_c();
+                    assert_eq!(generic_args.len(), 2);
+
+                    let namespaces_path = &identifier.variant.to_c_path();
+                    let nasp_path = if namespaces_path.is_empty() {
                         quote! {
-                        // eg: <Result<TrainedDog, TrainingMistake> as Convertible>::Ptr,
-                        <Result<#ident_ok, #ident_err> as Convertible>::Ptr
+                            crate ::
+                        }
+                    } else {
+                        let path = namespaces_path;
+                        quote! {
+                            #path ::
+                        }
+                    };
+
+                    let ident = format_ident!(
+                        "result_{}_{}",
+                        generic_args[0].to_string(),
+                        generic_args[1].to_string()
+                    );
+
+                    quote! {
+                        #nasp_path #ident
                     }
                 }
                 "Option" => {

src/macros/generate/convert/host/c/variant/mod.rs

@@ -45,13 +45,12 @@ impl Variant {
 
         let main_namespace;
         match self {
-            Variant::Structure { namespace } => {
+            Variant::Structure { namespace }
+            | Variant::Enumeration { namespace }
+            | Variant::Result { namespace } => {
                 main_namespace = mangle_namespace_name(namespace);
             }
-            Variant::Enumeration { namespace } => {
-                main_namespace = mangle_namespace_name(namespace);
-            }
-            _ => unreachable!("This should never be called"),
+            other => unreachable!("This should never be called on '{:#?}'", other),
         }
         Namespace::to_rust_path_owned(&main_namespace[..])
     }

src/macros/generate/host/c/mod.rs

@@ -36,10 +36,23 @@ pub fn generate(trixy: &CommandSpec, config: &TrixyConfig) -> String {
     format!(
         "\
 /* C API */\n\
+// Workaround rust rules when implementing a foreign trait on a foreign type
+#[derive(Debug)]
+pub struct OurResult<T, E> {{
+    value: Result<T, E>,
+}}
+
+impl<T, E> From<Result<T, E>> for OurResult<T, E> {{
+    fn from(value: Result<T, E>) -> Self {{
+        Self {{ value }}
+    }}
+}}
+/* The real C API */\n\
 {}",
         rust_code
     )
 }
+
 /// This function generates the main c API provided by Trixy.
 /// This works for example like this:
 /// Turning this:

src/parser/command_spec/checked.rs

@@ -36,9 +36,14 @@ pub enum Variant {
     Enumeration {
         namespace: Vec<Identifier>,
     },
+    Result {
+        namespace: Vec<Identifier>,
+    },
+
     Namespace,
     /// The first (implicit) namespace, containing everything
     RootNamespace,
+
     Function,
     Primitive,
     NamedType,
@@ -59,7 +64,7 @@ impl Variant {
     }
 }
 
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)]
 pub struct Namespace {
     pub name: Identifier,
 
@@ -89,21 +94,21 @@ impl From<Namespace> for CommandSpec {
     }
 }
 
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)]
 pub struct Structure {
     pub identifier: Identifier,
     pub contents: Vec<DocNamedType>,
     pub attributes: Vec<Attribute>,
 }
 
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)]
 pub struct Enumeration {
     pub identifier: Identifier,
     pub states: Vec<DocIdentifier>,
     pub attributes: Vec<Attribute>,
 }
 
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)]
 pub struct Function {
     pub identifier: Identifier,
     pub inputs: Vec<NamedType>,
@@ -206,7 +211,7 @@ pub struct NamedType {
     pub r#type: Type,
 }
 
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Clone)]
 pub struct DocNamedType {
     pub name: Identifier,
     pub r#type: Type,

src/parser/parsing/checked/mod.rs

@@ -159,7 +159,7 @@ impl Parser {
 
         let mut functions = vec![];
         for function in namespace.functions {
-            functions.push(self.process_function(function)?);
+            functions.push(self.process_function(function, &previous_namespaces)?);
         }
         let mut namespaces = vec![];
         for namespace in namespace.namespaces {
@@ -187,14 +187,15 @@ impl Parser {
     fn process_function(
         &mut self,
         mut function: UncheckedFunction,
+        parent_namespaces: &Vec<Identifier>,
     ) -> Result<Function, ParsingError> {
         let identifier = mem::take(&mut function.identifier.kind).to_identifier(Variant::Function);
         let mut inputs = vec![];
         for input in function.inputs {
-            inputs.push(self.process_named_type(input)?);
+            inputs.push(self.process_named_type(input, parent_namespaces)?);
         }
         let output = if let Some(r#type) = function.output {
-            Some(self.process_type(r#type)?)
+            Some(self.process_type(r#type, parent_namespaces)?)
         } else {
             None
         };
@@ -269,7 +270,7 @@ impl Parser {
             });
         let mut contents = vec![];
         for named_type in structure.contents {
-            contents.push(self.process_doc_named_type(named_type)?);
+            contents.push(self.process_doc_named_type(named_type, parent_namespaces)?);
         }
 
         Ok(Structure {
@@ -282,19 +283,21 @@ impl Parser {
     fn process_named_type(
         &mut self,
         mut named_type: UncheckedNamedType,
+        parent_namespaces: &Vec<Identifier>,
     ) -> Result<NamedType, ParsingError> {
         let name: Identifier =
             mem::take(&mut named_type.name.kind).to_identifier(Variant::NamedType);
-        let r#type: Type = self.process_type(named_type.r#type)?;
+        let r#type: Type = self.process_type(named_type.r#type, parent_namespaces)?;
         Ok(NamedType { name, r#type })
     }
     fn process_doc_named_type(
         &mut self,
         mut doc_named_type: UncheckedDocNamedType,
+        parent_namespaces: &Vec<Identifier>,
     ) -> Result<DocNamedType, ParsingError> {
         let name: Identifier =
             mem::take(&mut doc_named_type.name.kind).to_identifier(Variant::DocNamedType);
-        let r#type: Type = self.process_type(doc_named_type.r#type)?;
+        let r#type: Type = self.process_type(doc_named_type.r#type, parent_namespaces)?;
         Ok(DocNamedType {
             name,
             r#type,
@@ -302,14 +305,18 @@ impl Parser {
         })
     }
 
-    fn process_type(&mut self, r#type: UncheckedType) -> Result<Type, ParsingError> {
+    fn process_type(
+        &mut self,
+        r#type: UncheckedType,
+        parent_namespaces: &Vec<Identifier>,
+    ) -> Result<Type, ParsingError> {
         match r#type {
             UncheckedType::Typical {
                 identifier,
                 generic_args,
-            } => self.process_typical_type(identifier, generic_args),
+            } => self.process_typical_type(identifier, generic_args, parent_namespaces),
             UncheckedType::Function { inputs, output } => {
-                self.process_function_type(inputs, output)
+                self.process_function_type(inputs, output, parent_namespaces)
             }
         }
     }
@@ -318,6 +325,7 @@ impl Parser {
         &mut self,
         mut type_identifier: Token,
         generic_args: Vec<UncheckedType>,
+        parent_namespaces: &Vec<Identifier>,
     ) -> Result<Type, ParsingError> {
         fn match_to_vector_struct(matches: Vec<&UncheckedStructure>) -> Vec<Identifier> {
             matches
@@ -401,7 +409,13 @@ impl Parser {
             .iter()
             .any(|(ident, _)| ident == &identifier.name)
         {
+            if &identifier.name == "Result" {
+                variant = Variant::Result {
+                    namespace: parent_namespaces.clone(),
+                };
+            } else {
                 variant = Variant::Primitive;
+            }
         } else {
             return Err(ParsingError::TypeNotDeclared {
                 r#type: identifier,
@@ -461,7 +475,7 @@ impl Parser {
 
         let mut new_generic_args: Vec<checked::Type> = vec![];
         for generic_arg in generic_args {
-            new_generic_args.push(self.process_type(generic_arg)?);
+            new_generic_args.push(self.process_type(generic_arg, parent_namespaces)?);
         }
 
         Ok(Type::Typical {
@@ -473,15 +487,16 @@ impl Parser {
         &mut self,
         inputs: Vec<UncheckedNamedType>,
         output: Option<Box<UncheckedType>>,
+        parent_namespaces: &Vec<Identifier>,
     ) -> Result<Type, ParsingError> {
         let inputs = inputs
             .into_iter()
-            .map(|input| self.process_named_type(input))
+            .map(|input| self.process_named_type(input, parent_namespaces))
             .collect::<Result<Vec<NamedType>, ParsingError>>()?;
 
         let mut new_output = None;
         if let Some(output) = output {
-            new_output = Some(Box::new(self.process_type(*output)?));
+            new_output = Some(Box::new(self.process_type(*output, parent_namespaces)?));
         }
 
         Ok(Type::Function {

src/types/c_headers/result.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2023 - 2024:
+ * The Trinitrix Project <soispha@vhack.eu, antifallobst@systemausfall.org>
+ * SPDX-License-Identifier: LGPL-3.0-or-later
+ *
+ * This file is part of the Trixy crate for Trinitrix.
+ *
+ * Trixy is free software: you can redistribute it and/or modify
+ * it under the terms of the Lesser GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * and the Lesser GNU General Public License along with this program.
+ * If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef TRIXY_RESULT_H
+#define TRIXY_RESULT_H
+
+/**
+ * @brief A rust-like result type
+ *
+ * @detail
+ * This macro effectively generates a type name from the two generic
+ * parameters. The generated type name is always globally unique.
+ */
+#define Result(ok, err) struct result_##ok##_##err
+
+/**
+ * @brief The possibly states of a Result.
+ */
+enum ResultTag
+{
+  OK,
+  ERR,
+};
+
+#endif // TRIXY_RESULT_H

src/types/mod.rs

@@ -40,7 +40,7 @@ macro_rules! header {
 // NOTE: Every type here must have the [`Convertible`] implemented on it (@soispha)
 // And be added to the `convert/c/auxiliary/idendentifier/mod.rs` file
 // And add it to the types list (`./types_list.rs`)
-pub const BASE_TYPES: [(&'static std::primitive::str, usize); 11] = [
+pub const BASE_TYPES: [(&'static std::primitive::str, usize); 12] = [
     // Unsigned
     ("u8", 0),
     ("u16", 0),
@@ -56,15 +56,19 @@ pub const BASE_TYPES: [(&'static std::primitive::str, usize); 11] = [
     ("f64", 0),
     // Other
     ("String", 0),
+    ("Result", 2),
     // FIXME(@soispha): These work, but the generated code is not really ideal <2024-03-26>
     // ("Option", 1),
     // ("Vec", 1),
-    // ("Result", 2),
 ];
 
 /// The first value is the file name, the second it's contents
-pub const C_TYPE_HEADER: [(&'static std::primitive::str, &'static std::primitive::str); 3] =
-    [header!("errno.h"), header!("string.h"), header!("vec.h")];
+pub const C_TYPE_HEADER: [(&'static std::primitive::str, &'static std::primitive::str); 4] = [
+    header!("errno.h"),
+    header!("string.h"),
+    header!("vec.h"),
+    header!("result.h"),
+];
 
 pub fn header_names() -> std::string::String {
     C_TYPE_HEADER

src/types/traits/convert_trait.rs

@@ -129,121 +129,93 @@ pub extern "C" fn string_free(ptr: *const c_char) {
     CString::drop_ptr(ptr);
 }
 
-impl<T: Convertible> Convertible for Option<T> {
-    type Ptr = *const <T as Convertible>::Ptr;
-
-    fn into_ptr(self) -> Self::Ptr {
-        if let Some(inner) = self {
-            &inner.into_ptr()
-        } else {
-            ptr::null()
-        }
-    }
-
-    fn from_ptr(_: Self::Ptr) -> Result<Self, error::TypeConversionError> {
-        warn!(
-            "
-                This should never be called, as this option type resolves
-                to a null pointer or to a pointer to the real value
-                (e. g. a `crate::Vec<T>`)
-            "
-        );
-        Ok(Option::default())
-    }
-}
-
-impl<T: Convertible, E: Error> Convertible for Result<T, E> {
-    type Ptr = *const <T as Convertible>::Ptr;
-
-    fn into_ptr(self) -> Self::Ptr {
-        match self {
-            Ok(ok) => &ok.into_ptr(),
-            Err(err) => {
-                errno::set(TypeConversionError::ResultWasErr {
-                    original_message: err.to_string(),
-                });
-                ptr::null()
-            }
-        }
-    }
-
-    fn from_ptr(_: Self::Ptr) -> Result<Self, error::TypeConversionError> {
-        warn!(
-            "
-                This should never be called, as this result type resolves
-                to a null pointer (and a set error) or to a pointer to
-                the real value (e. g. a `crate::Vec<T>`)
-            "
-        );
-        todo!()
-        // Ok(Result::Ok(T::default()))
-    }
-}
-
-impl<T: Convertible> Convertible for Vec<T> {
-    type Ptr = crate::types::Vec<<T as Convertible>::Ptr>;
-
-    fn into_ptr(self) -> Self::Ptr {
-        let data_vec: Vec<_> = self.into_iter().map(|val| val.into_ptr()).collect();
-        let data_vec = ManuallyDrop::new(data_vec);
-        Self::Ptr {
-            data: data_vec.as_ptr(),
-            length: data_vec.len(),
-            capacity: data_vec.capacity(),
-        }
-    }
-
-    fn from_ptr(ptr: Self::Ptr) -> Result<Self, error::TypeConversionError> {
-        if ptr.data.is_null() {
-            return Err(TypeConversionError::NullPointer);
-        }
-        // TODO(@soispha): Add this, when this feature is stable <2024-02-17>
-        // if !ptr.data.is_aligned() {
-        //     return Err(TypeConversionError::NotAligned);
+// impl<T: Convertible> Convertible for Option<T> {
+//     type Ptr = *const <T as Convertible>::Ptr;
+//
+//     fn into_ptr(self) -> Self::Ptr {
+//         if let Some(inner) = self {
+//             &inner.into_ptr()
+//         } else {
+//             ptr::null()
+//         }
+//     }
+//
+//     fn from_ptr(_: Self::Ptr) -> Result<Self, error::TypeConversionError> {
+//         warn!(
+//             "
+//                 This should never be called, as this option type resolves
+//                 to a null pointer or to a pointer to the real value
+//                 (e. g. a `crate::Vec<T>`)
+//             "
+//         );
+//         Ok(Option::default())
+//     }
 // }
-        let base_vec = unsafe {
-            // SAFETY:
-            // We simply hope that c treated our vector as read-only and didn't modify it.
-            // See the SAFETY section of the String implementation for more detail.
-            Vec::from_raw_parts(
-                ptr.data as *mut <T as Convertible>::Ptr,
-                ptr.length,
-                ptr.capacity,
-            )
-        };
 
-        let vec: Vec<_> = base_vec
-            .into_iter()
-            .map(|val| <T as Convertible>::from_ptr(val))
-            .collect::<Result<Vec<_>, _>>()?;
-        Ok(vec)
-    }
-}
-
-macro_rules! make_vec_free {
-    ($value:ident, $name:ident) => {
-        #[no_mangle]
-        pub extern "C" fn $name(ptr: crate::types::Vec<<$value as Convertible>::Ptr>) {
-            Vec::<$value>::drop_ptr(ptr);
-        }
-    };
-}
-
-// Unsigned
-make_vec_free!(u8, vec_free_u8);
-make_vec_free!(u16, vec_free_u16);
-make_vec_free!(u32, vec_free_u32);
-make_vec_free!(u64, vec_free_u64);
-// Signed
-make_vec_free!(i8, vec_free_i8);
-make_vec_free!(i16, vec_free_i16);
-make_vec_free!(i32, vec_free_i32);
-make_vec_free!(i64, vec_free_i64);
-// Float
-make_vec_free!(f32, vec_free_f32);
-make_vec_free!(f64, vec_free_f64);
-// Other
-make_vec_free!(String, vec_free_String);
+// impl<T: Convertible> Convertible for Vec<T> {
+//     type Ptr = crate::types::Vec<<T as Convertible>::Ptr>;
+//
+//     fn into_ptr(self) -> Self::Ptr {
+//         let data_vec: Vec<_> = self.into_iter().map(|val| val.into_ptr()).collect();
+//         let data_vec = ManuallyDrop::new(data_vec);
+//         Self::Ptr {
+//             data: data_vec.as_ptr(),
+//             length: data_vec.len(),
+//             capacity: data_vec.capacity(),
+//         }
+//     }
+//
+//     fn from_ptr(ptr: Self::Ptr) -> Result<Self, error::TypeConversionError> {
+//         if ptr.data.is_null() {
+//             return Err(TypeConversionError::NullPointer);
+//         }
+//         // TODO(@soispha): Add this, when this feature is stable <2024-02-17>
+//         // if !ptr.data.is_aligned() {
+//         //     return Err(TypeConversionError::NotAligned);
+//         // }
+//         let base_vec = unsafe {
+//             // SAFETY:
+//             // We simply hope that c treated our vector as read-only and didn't modify it.
+//             // See the SAFETY section of the String implementation for more detail.
+//             Vec::from_raw_parts(
+//                 ptr.data as *mut <T as Convertible>::Ptr,
+//                 ptr.length,
+//                 ptr.capacity,
+//             )
+//         };
+//
+//         let vec: Vec<_> = base_vec
+//             .into_iter()
+//             .map(|val| <T as Convertible>::from_ptr(val))
+//             .collect::<Result<Vec<_>, _>>()?;
+//         Ok(vec)
+//     }
+// }
+//
+// macro_rules! make_vec_free {
+//     ($value:ident, $name:ident) => {
+//         #[no_mangle]
+//         pub extern "C" fn $name(ptr: crate::types::Vec<<$value as Convertible>::Ptr>) {
+//             Vec::<$value>::drop_ptr(ptr);
+//         }
+//     };
+// }
+//
+// // Unsigned
+// make_vec_free!(u8, vec_free_u8);
+// make_vec_free!(u16, vec_free_u16);
+// make_vec_free!(u32, vec_free_u32);
+// make_vec_free!(u64, vec_free_u64);
+// // Signed
+// make_vec_free!(i8, vec_free_i8);
+// make_vec_free!(i16, vec_free_i16);
+// make_vec_free!(i32, vec_free_i32);
+// make_vec_free!(i64, vec_free_i64);
+// // Float
+// make_vec_free!(f32, vec_free_f32);
+// make_vec_free!(f64, vec_free_f64);
+// // Other
+// make_vec_free!(String, vec_free_String);
 
 // FIXME(@soispha): Find a way to support these <2024-02-27>
 // make_vec_free!(Option<?>, vec_free_Option);

src/types/types_list.rs

@@ -23,24 +23,30 @@
 // NOTE(@soispha): All types specified here *MUST* be include in the BASE_TYPES constant, otherwise
 // they are not usable from Trixy code <2023-12-25>
 
-// NOTE(@soispha): All types added here must also have an added free impl for the vector type (./traits/convert_trait.rs) <2024-02-27>
-
 use std::ffi::c_char;
 
 #[derive(Debug, Clone)]
 #[repr(C)]
 pub struct String(pub(crate) *const c_char);
 
+/// The tag used to tag the c result Enumerations
 #[derive(Debug)]
 #[repr(C)]
-pub struct Vec<T> {
-    /// You should cast this value to it's supposed type (readable from the Trixy api definition
-    /// file)
-    pub(crate) data: *const T,
-    pub(crate) length: usize,
-    pub(crate) capacity: usize,
+pub enum ResultTag {
+    Ok,
+    Err,
 }
 
+// #[derive(Debug)]
+// #[repr(C)]
+// pub struct Vec<T> {
+//     /// You should cast this value to it's supposed type (readable from the Trixy api definition
+//     /// file)
+//     pub(crate) data: *const T,
+//     pub(crate) length: usize,
+//     pub(crate) capacity: usize,
+// }
+
 // Unsigned
 pub use std::primitive::u16;
 pub use std::primitive::u32;