ctest-next: miscellaneous filtering bug fixes

Author: mbyx

.github/workflows/ci.yaml

@@ -89,7 +89,7 @@ jobs:
               # Remove `-Dwarnings` at the MSRV since lints may be different
               export RUSTFLAGS=""
               # Remove `ctest-next` which uses the 2024 edition
-              perl -i -ne 'print unless /"ctest-(next|test)",/' Cargo.toml
+              perl -i -ne 'print unless /"ctest-(next|test)",/ || /"libc-test",/' Cargo.toml
           fi
 
           ./ci/verify-build.sh
@@ -320,7 +320,7 @@ jobs:
     - name: Install Rust
       run: rustup update "$MSRV" --no-self-update && rustup default "$MSRV"
     - name: Remove edition 2024 crates
-      run: perl -i -ne 'print unless /"ctest-(next|test)",/' Cargo.toml
+      run: perl -i -ne 'print unless /"ctest-(next|test)",/ || /"libc-test",/' Cargo.toml
     - uses: Swatinem/rust-cache@v2
     - run: cargo build -p ctest
 

Cargo.lock

@@ -3,7 +3,6 @@ use crate::{BoxStr, Field};
 /// Represents a union defined in Rust.
 #[derive(Debug, Clone)]
 pub struct Union {
-    #[expect(unused)]
     pub(crate) public: bool,
     pub(crate) ident: BoxStr,
     pub(crate) fields: Vec<Field>,

ctest-next/src/ast/union.rs

@@ -40,10 +40,10 @@ pub struct TestGenerator {
     cfg: Vec<(String, Option<String>)>,
     mapped_names: Vec<MappedName>,
     pub(crate) skips: Vec<Skip>,
-    verbose_skip: bool,
+    pub(crate) verbose_skip: bool,
     pub(crate) volatile_items: Vec<VolatileItem>,
     pub(crate) array_arg: Option<ArrayArg>,
-    skip_private: bool,
+    pub(crate) skip_private: bool,
     pub(crate) skip_roundtrip: Option<SkipTest>,
     pub(crate) skip_signededness: Option<SkipTest>,
     pub(crate) skip_fn_ptrcheck: Option<SkipTest>,
@@ -898,8 +898,6 @@ impl TestGenerator {
         let mut ffi_items = FfiItems::new();
         ffi_items.visit_file(&ast);
 
-        self.filter_ffi_items(&mut ffi_items);
-
         let output_directory = self
             .out_dir
             .clone()
@@ -938,37 +936,6 @@ impl TestGenerator {
         Ok(output_file_path)
     }
 
-    /// Skips entire items such as structs, constants, and aliases from being tested.
-    ///
-    /// Does not skip specific tests or specific fields. If `skip_private` is true,
-    /// it will skip tests for all private items.
-    fn filter_ffi_items(&self, ffi_items: &mut FfiItems) {
-        let verbose = self.verbose_skip;
-
-        macro_rules! filter {
-            ($field:ident, $variant:ident, $label:literal) => {{
-                let skipped: Vec<_> = ffi_items
-                    .$field
-                    .extract_if(.., |item| {
-                        self.skips.iter().any(|f| f(&MapInput::$variant(item)))
-                            || (self.skip_private && !item.public)
-                    })
-                    .collect();
-                if verbose {
-                    skipped
-                        .iter()
-                        .for_each(|item| eprintln!("Skipping {} \"{}\"", $label, item.ident()));
-                }
-            }};
-        }
-
-        filter!(aliases, Alias, "alias");
-        filter!(constants, Const, "const");
-        filter!(structs, Struct, "struct");
-        filter!(foreign_functions, Fn, "fn");
-        filter!(foreign_statics, Static, "static");
-    }
-
     /// Maps Rust identifiers or types to C counterparts, or defaults to the original name.
     pub(crate) fn rty_to_cty<'a>(&self, item: impl Into<MapInput<'a>>) -> String {
         let item = item.into();

ctest-next/src/generator.rs

@@ -3,6 +3,7 @@ use proc_macro2::Span;
 use quote::ToTokens;
 use syn::spanned::Spanned;
 
+use crate::cdecl::Constness;
 use crate::ffi_items::FfiItems;
 use crate::translator::{TranslationErrorKind, Translator};
 use crate::{
@@ -86,7 +87,7 @@ impl TestTemplate {
         &mut self,
         helper: &TranslateHelper,
     ) -> Result<(), TranslationError> {
-        for constant in helper.ffi_items.constants() {
+        for constant in helper.filtered_ffi_items.constants() {
             if let syn::Type::Ptr(ptr) = &constant.ty
                 && let syn::Type::Path(path) = &*ptr.elem
                 && path.path.segments.last().unwrap().ident == "c_char"
@@ -124,7 +125,7 @@ impl TestTemplate {
         &mut self,
         helper: &TranslateHelper,
     ) -> Result<(), TranslationError> {
-        for alias in helper.ffi_items.aliases() {
+        for alias in helper.filtered_ffi_items.aliases() {
             let item = TestSizeAlign {
                 test_name: size_align_test_ident(alias.ident()),
                 id: alias.ident().into(),
@@ -134,7 +135,7 @@ impl TestTemplate {
             self.size_align_tests.push(item.clone());
             self.test_idents.push(item.test_name);
         }
-        for struct_ in helper.ffi_items.structs() {
+        for struct_ in helper.filtered_ffi_items.structs() {
             let item = TestSizeAlign {
                 test_name: size_align_test_ident(struct_.ident()),
                 id: struct_.ident().into(),
@@ -144,7 +145,7 @@ impl TestTemplate {
             self.size_align_tests.push(item.clone());
             self.test_idents.push(item.test_name);
         }
-        for union_ in helper.ffi_items.unions() {
+        for union_ in helper.filtered_ffi_items.unions() {
             let item = TestSizeAlign {
                 test_name: size_align_test_ident(union_.ident()),
                 id: union_.ident().into(),
@@ -165,7 +166,7 @@ impl TestTemplate {
         &mut self,
         helper: &TranslateHelper,
     ) -> Result<(), TranslationError> {
-        for alias in helper.ffi_items.aliases() {
+        for alias in helper.filtered_ffi_items.aliases() {
             let should_skip_signededness_test = helper
                 .generator
                 .skip_signededness
@@ -197,7 +198,7 @@ impl TestTemplate {
         let should_skip = |map_input| helper.generator.skips.iter().any(|f| f(&map_input));
 
         let struct_fields = helper
-            .ffi_items
+            .filtered_ffi_items
             .structs()
             .iter()
             .flat_map(|struct_| struct_.fields.iter().map(move |field| (struct_, field)))
@@ -213,7 +214,7 @@ impl TestTemplate {
                 )
             });
         let union_fields = helper
-            .ffi_items
+            .filtered_ffi_items
             .unions()
             .iter()
             .flat_map(|union_| union_.fields.iter().map(move |field| (union_, field)))
@@ -251,15 +252,15 @@ impl TestTemplate {
         &mut self,
         helper: &TranslateHelper,
     ) -> Result<(), TranslationError> {
-        for alias in helper.ffi_items.aliases() {
+        for alias in helper.filtered_ffi_items.aliases() {
             let c_ty = helper.c_type(alias)?;
             self.add_roundtrip_test(helper, alias.ident(), &[], &c_ty, true);
         }
-        for struct_ in helper.ffi_items.structs() {
+        for struct_ in helper.filtered_ffi_items.structs() {
             let c_ty = helper.c_type(struct_)?;
             self.add_roundtrip_test(helper, struct_.ident(), &struct_.fields, &c_ty, false);
         }
-        for union_ in helper.ffi_items.unions() {
+        for union_ in helper.filtered_ffi_items.unions() {
             let c_ty = helper.c_type(union_)?;
             self.add_roundtrip_test(helper, union_.ident(), &union_.fields, &c_ty, false);
         }
@@ -303,14 +304,14 @@ impl TestTemplate {
         let should_skip = |map_input| helper.generator.skips.iter().any(|f| f(&map_input));
 
         let struct_fields = helper
-            .ffi_items
+            .filtered_ffi_items
             .structs()
             .iter()
             .flat_map(|s| s.fields.iter().map(move |f| (s, f)))
             .filter(|(s, f)| {
-                !should_skip(MapInput::StructField(s, f))
-                    && !should_skip(MapInput::StructFieldType(s, f))
-                    && f.public
+                !(should_skip(MapInput::StructField(s, f))
+                    || should_skip(MapInput::StructFieldType(s, f))
+                    || !f.public)
             })
             .map(|(s, f)| {
                 (
@@ -332,14 +333,14 @@ impl TestTemplate {
                 )
             });
         let union_fields = helper
-            .ffi_items
+            .filtered_ffi_items
             .unions()
             .iter()
             .flat_map(|u| u.fields.iter().map(move |f| (u, f)))
             .filter(|(u, f)| {
-                !should_skip(MapInput::UnionField(u, f))
-                    && !should_skip(MapInput::UnionFieldType(u, f))
-                    && f.public
+                !(should_skip(MapInput::UnionField(u, f))
+                    || should_skip(MapInput::UnionFieldType(u, f))
+                    || !f.public)
             })
             .map(|(u, f)| {
                 (
@@ -532,6 +533,7 @@ fn foreign_fn_test_ident(ident: &str) -> BoxStr {
 
 /// Wrap methods that depend on both ffi items and the generator.
 pub(crate) struct TranslateHelper<'a> {
+    filtered_ffi_items: FfiItems,
     ffi_items: &'a FfiItems,
     generator: &'a TestGenerator,
     translator: Translator<'a>,
@@ -540,11 +542,49 @@ pub(crate) struct TranslateHelper<'a> {
 impl<'a> TranslateHelper<'a> {
     /// Create a new translation helper.
     pub(crate) fn new(ffi_items: &'a FfiItems, generator: &'a TestGenerator) -> Self {
-        Self {
+        let filtered_ffi_items = ffi_items.clone();
+        let mut helper = Self {
+            filtered_ffi_items,
             ffi_items,
             generator,
             translator: Translator::new(ffi_items, generator),
+        };
+        helper.filter_ffi_items();
+
+        helper
+    }
+
+    /// Skips entire items such as structs, constants, and aliases from being tested.
+    ///
+    /// Does not skip specific tests or specific fields. If `skip_private` is true,
+    /// it will skip tests for all private items.
+    fn filter_ffi_items(&mut self) {
+        let verbose = self.generator.verbose_skip;
+
+        macro_rules! filter {
+            ($field:ident, $variant:ident, $label:literal) => {{
+                let skipped = self.filtered_ffi_items.$field.extract_if(.., |item| {
+                    (self.generator.skip_private && !item.public)
+                        || self
+                            .generator
+                            .skips
+                            .iter()
+                            .any(|f| f(&MapInput::$variant(item)))
+                });
+                for item in skipped {
+                    if verbose {
+                        eprintln!("Skipping {} \"{}\"", $label, item.ident())
+                    }
+                }
+            }};
         }
+
+        filter!(aliases, Alias, "alias");
+        filter!(constants, Const, "const");
+        filter!(structs, Struct, "struct");
+        filter!(unions, Union, "union");
+        filter!(foreign_functions, Fn, "fn");
+        filter!(foreign_statics, Static, "static");
     }
 
     /// Returns the equivalent C/Cpp identifier of the Rust item.
@@ -565,9 +605,9 @@ impl<'a> TranslateHelper<'a> {
             // inside of `Fn` when parsed.
             MapInput::Fn(_) => unimplemented!(),
             // For structs/unions/aliases, their type is the same as their identifier.
-            MapInput::Alias(a) => (a.ident(), cdecl::named(a.ident(), cdecl::Constness::Mut)),
-            MapInput::Struct(s) => (s.ident(), cdecl::named(s.ident(), cdecl::Constness::Mut)),
-            MapInput::Union(u) => (u.ident(), cdecl::named(u.ident(), cdecl::Constness::Mut)),
+            MapInput::Alias(a) => (a.ident(), cdecl::named(a.ident(), Constness::Mut)),
+            MapInput::Struct(s) => (s.ident(), cdecl::named(s.ident(), Constness::Mut)),
+            MapInput::Union(u) => (u.ident(), cdecl::named(u.ident(), Constness::Mut)),
 
             MapInput::StructType(_) => panic!("MapInput::StructType is not allowed!"),
             MapInput::UnionType(_) => panic!("MapInput::UnionType is not allowed!"),
@@ -584,7 +624,7 @@ impl<'a> TranslateHelper<'a> {
             )
         })?;
 
-        let item = if self.ffi_items.contains_struct(ident) {
+        let item = if self.ffi_items.contains_struct(&ty) {
             MapInput::StructType(&ty)
         } else if self.ffi_items.contains_union(ident) {
             MapInput::UnionType(&ty)

ctest-next/src/template.rs

@@ -127,3 +127,11 @@ fn test_translate_helper_array_1d_2d() {
     assert_r2cdecl("[u8; 10]", "uint8_t foo[10]");
     assert_r2cdecl("[[u8; 64]; 32]", "uint8_t foo[32][64]");
 }
+
+#[test]
+fn test_translate_expr_literal_types() {
+    assert_eq!(
+        r2cdecl("[u8; 10usize]", "foo").unwrap(),
+        "uint8_t foo[(size_t)10]"
+    );
+}

ctest-next/src/tests.rs

@@ -364,6 +364,24 @@ pub(crate) fn ptr_with_inner(
 /// This function will just pass the expression as is in most cases.
 pub(crate) fn translate_expr(expr: &syn::Expr) -> String {
     match expr {
+        syn::Expr::Index(i) => {
+            let base = translate_expr(&i.expr);
+            let index = translate_expr(&i.index);
+            format!("{base}[{index}]")
+        }
+        // This is done to deal with things like 3usize.
+        syn::Expr::Lit(l) => match &l.lit {
+            syn::Lit::Int(i) => {
+                let suffix = translate_primitive_type(i.suffix());
+                let val = i.base10_digits().to_string();
+                if suffix.is_empty() {
+                    val
+                } else {
+                    format!("({suffix}){val}")
+                }
+            }
+            _ => l.to_token_stream().to_string(),
+        },
         syn::Expr::Path(p) => p.path.segments.last().unwrap().ident.to_string(),
         syn::Expr::Cast(c) => translate_expr(c.expr.deref()),
         expr => expr.to_token_stream().to_string(),

ctest-next/src/translator.rs

@@ -21,6 +21,7 @@ annotate-snippets = { version = "0.11.5", features = ["testing-colors"] }
 [build-dependencies]
 cc = "1.2.29"
 ctest = { path = "../ctest" }
+ctest-next = { path = "../ctest-next" }
 regex = "1.11.1"
 
 [features]
@@ -33,6 +34,11 @@ name = "ctest"
 path = "test/ctest.rs"
 harness = false
 
+[[test]]
+name = "ctest_next"
+path = "test/ctest_next.rs"
+harness = false
+
 [[test]]
 name = "linux-fcntl"
 path = "test/linux_fcntl.rs"

libc-test/Cargo.toml

@@ -77,6 +77,11 @@ fn ctest_cfg() -> ctest::TestGenerator {
     ctest::TestGenerator::new()
 }
 
+#[expect(unused)]
+fn ctest_next_cfg() -> ctest_next::TestGenerator {
+    ctest_next::TestGenerator::new()
+}
+
 fn do_semver() {
     let mut out = PathBuf::from(env::var("OUT_DIR").unwrap());
     out.push("semver.rs");
@@ -164,6 +169,14 @@ fn main() {
     let re = regex::bytes::Regex::new(r"(?-u:\b)crate::").unwrap();
     copy_dir_hotfix(Path::new("../src"), &hotfix_dir, &re, b"::");
 
+    // FIXME(ctest): Only needed until ctest-next supports all tests.
+    // Provide a default for targets that don't yet use `ctest-next`.
+    std::fs::write(
+        format!("{}/main_next.rs", std::env::var("OUT_DIR").unwrap()),
+        "\nfn main() { println!(\"test result: ok\"); }\n",
+    )
+    .unwrap();
+
     do_cc();
     do_ctest();
     do_semver();

libc-test/build.rs

@@ -0,0 +1,5 @@
+#[allow(deprecated)]
+#[allow(unused_imports)]
+use libc::*;
+
+include!(concat!(env!("OUT_DIR"), "/main_next.rs"));