reflect: implement exactsizeiter for iterators

spirv-cross2/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "spirv-cross2"
-version = "0.3.3"
+version = "0.3.5"
 edition = "2021"
 
 license = "MIT OR Apache-2.0"

spirv-cross2/src/compile/glsl/mod.rs

@@ -227,6 +227,12 @@ pub struct GlslExtensionsIter<'a>(
     PhantomCompiler<'a>,
 );
 
+impl ExactSizeIterator for GlslExtensionsIter<'_> {
+    fn len(&self) -> usize {
+        self.0.len()
+    }
+}
+
 impl<'comp> Iterator for GlslExtensionsIter<'comp> {
     type Item = ContextStr<'comp>;
 

spirv-cross2/src/reflect/combined_image_samplers.rs

@@ -18,6 +18,12 @@ pub struct CombinedImageSamplerIter<'a>(
     slice::Iter<'a, sys::spvc_combined_image_sampler>,
 );
 
+impl ExactSizeIterator for CombinedImageSamplerIter<'_> {
+    fn len(&self) -> usize {
+        self.1.len()
+    }
+}
+
 impl Iterator for CombinedImageSamplerIter<'_> {
     type Item = CombinedImageSampler;
 

spirv-cross2/src/reflect/constants.rs

@@ -90,6 +90,12 @@ pub struct SpecializationConstantIter<'a>(
     slice::Iter<'a, spvc_specialization_constant>,
 );
 
+impl ExactSizeIterator for SpecializationConstantIter<'_> {
+    fn len(&self) -> usize {
+        self.1.len()
+    }
+}
+
 impl Iterator for SpecializationConstantIter<'_> {
     type Item = SpecializationConstant;
 

spirv-cross2/src/reflect/entry_points.rs

@@ -1,6 +1,6 @@
 use crate::error::{SpirvCrossError, ToContextError};
 use crate::handle::Handle;
-use crate::reflect::try_valid_slice;
+use crate::reflect::{try_valid_slice, CombinedImageSamplerIter};
 use crate::string::ContextStr;
 use crate::{error, spirv};
 use crate::{Compiler, ContextRoot};
@@ -24,6 +24,12 @@ impl<'a> Iterator for ExtensionsIter<'a> {
     }
 }
 
+impl ExactSizeIterator for ExtensionsIter<'_> {
+    fn len(&self) -> usize {
+        self.0.len()
+    }
+}
+
 /// Querying declared properties of the SPIR-V module.
 impl<'ctx, T> Compiler<'ctx, T> {
     /// Gets the list of all SPIR-V Capabilities which were declared in the SPIR-V module.
@@ -131,6 +137,12 @@ pub struct EntryPoint<'a> {
     pub name: ContextStr<'a>,
 }
 
+impl ExactSizeIterator for EntryPointIter<'_> {
+    fn len(&self) -> usize {
+        self.0.len()
+    }
+}
+
 impl<'a> Iterator for EntryPointIter<'a> {
     type Item = EntryPoint<'a>;
 

spirv-cross2/src/reflect/resources.rs

@@ -163,6 +163,12 @@ pub struct ResourceIter<'a>(
     slice::Iter<'a, spvc_reflected_resource>,
 );
 
+impl ExactSizeIterator for ResourceIter<'_> {
+    fn len(&self) -> usize {
+        self.1.len()
+    }
+}
+
 impl<'a> Iterator for ResourceIter<'a> {
     type Item = Resource<'a>;
 
@@ -329,6 +335,12 @@ impl Clone for BuiltinResource<'_> {
     }
 }
 
+impl ExactSizeIterator for BuiltinResourceIter<'_> {
+    fn len(&self) -> usize {
+        self.1.len()
+    }
+}
+
 /// All SPIR-V resources declared in the module.
 #[derive(Debug)]
 pub struct AllResources<'a> {