Feat/generator config

rasn-compiler-tests/src/helpers/mod.rs

@@ -13,7 +13,7 @@ macro_rules! e2e_pdu {
         fn $suite() {
             rasn_compiler_derive::asn1!($asn1);
             assert_eq!(
-                rasn_compiler::Compiler::new()
+                rasn_compiler::Compiler::<rasn_compiler::prelude::RasnBackend, _>::new()
                     .add_asn_literal(&format!("TestModule DEFINITIONS AUTOMATIC TAGS::= BEGIN {} END", $asn1))
                     .compile_to_string()
                     .unwrap()

rasn-compiler-tests/tests/edge_cases.rs

@@ -1,34 +1,6 @@
 #![allow(non_camel_case_types)]
 use rasn_compiler_tests::e2e_pdu;
 
-#[test]
-fn t() {
-    println!(
-        "{:?}",
-        rasn_compiler::Compiler::new()
-            .add_asn_literal(
-                r#"TestModule DEFINITIONS AUTOMATIC TAGS::= BEGIN 
-
-    Restricted ::= Distinguished (second|fourth..sixth|eighth)
-    Distinguished ::= INTEGER {
-        first(1),
-        second(2),
-        third(3),
-        fourth(4),
-        fifth(5),
-        sixth(6),
-        seventh(7),
-        eighth(8),
-        ninth(9),
-        tenth(10),
-    } (1..10)
-     END"#
-            )
-            .compile_to_string()
-            .unwrap()
-    );
-}
-
 e2e_pdu!(
     distinguished_value_range,
     r#" Restricted ::= Distinguished (second|fourth..sixth|eighth)

rasn-compiler-tests/tests/parse_test.rs

@@ -1,4 +1,4 @@
-use rasn_compiler::Compiler;
+use rasn_compiler::{prelude::RasnBackend, Compiler};
 
 #[test]
 #[ignore]
@@ -10,7 +10,7 @@ fn parses_modules() {
     for entry in read_dir.flatten() {
         let path = entry.path();
         println!("{:?}", &path);
-        if let Err(e) = Compiler::new()
+        if let Err(e) = Compiler::<RasnBackend, _>::new()
             .add_asn_by_path(path.clone())
             .compile_to_string()
         {
@@ -48,15 +48,18 @@ Failed to parse {failed} modules with the following errors:
 fn compile_etsi() {
     println!(
         "{:?}",
-        Compiler::new()
-            // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_class.asn")
-            // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_common.asn")
-            // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_const.asn")
-            // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_container.asn")
-            // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_ies.asn")
-            // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_pdus.asn")
-            .add_asn_by_path("../rasn-compiler/test_asn1/s1ap.asn")
-            .set_output_path("./tests")
-            .compile()
+        Compiler::<RasnBackend, _>::new_with_config(rasn_compiler::prelude::RasnConfig {
+            opaque_open_types: false,
+            default_wildcard_imports: true
+        })
+        // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_class.asn")
+        // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_common.asn")
+        // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_const.asn")
+        // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_container.asn")
+        // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_ies.asn")
+        // .add_asn_by_path("../rasn-compiler/test_asn1/ngap_pdus.asn")
+        .add_asn_by_path("../rasn-compiler/test_asn1/Simple.asn")
+        .set_output_path("./tests")
+        .compile()
     );
 }

rasn-compiler/src/generator/mod.rs

@@ -2,7 +2,9 @@
 //! decoding and encoding of the parsed and validated ASN1 data elements.
 //! The `generator` uses string templates for generating rust code.
 
-use std::error::Error;
+use std::{error::Error, fmt::Debug};
+
+use proc_macro2::TokenStream;
 
 use crate::intermediate::ToplevelDefinition;
 
@@ -14,7 +16,8 @@ pub mod rasn;
 /// Implementors of the `Backend` trait can be used
 /// as a backend to the compiler in order to create bindings
 /// for other frameworks and languages than the default backend.
-pub trait Backend: Sized {
+pub trait Backend: Sized + Default {
+    type Config: Sized + Default + Debug;
     /// generates bindings for an ASN.1 module
     /// ### Params
     /// - `top_level_declarations` vector of [TopLevelDeclaration]s that are defined in the ASN.1 module
@@ -23,9 +26,22 @@ pub trait Backend: Sized {
         top_level_declarations: Vec<ToplevelDefinition>,
     ) -> Result<GeneratedModule, GeneratorError>;
 
-    fn format_bindings(bindings: &String) -> Result<String, Box<dyn Error>> {
-        Ok(bindings.clone())
+    /// generates bindings for a single ASN.1 item
+    /// ### Params
+    /// - `tld` [TopLevelDeclaration] for which the bindings should be generated
+    fn generate(&self, tld: ToplevelDefinition) -> Result<TokenStream, GeneratorError>;
+
+    /// Formats the bindings using the language- or framework-specific linters.
+    /// For example, the Rust backend uses rustfmt for formatting bindings.
+    fn format_bindings(bindings: &str) -> Result<String, Box<dyn Error>> {
+        Ok(bindings.to_owned())
     }
+
+    /// Returns a reference to the backend's config
+    fn config(&self) -> &Self::Config;
+
+    /// Creates a backend from its config
+    fn from_config(config: Self::Config) -> Self;
 }
 
 pub struct GeneratedModule {