Add attributes for source location.

Author: adetaylor

bindgen/codegen/helpers.rs

@@ -79,7 +79,7 @@ pub(crate) mod attributes {
     }
 }
 
-pub trait CppSemanticAttributeCreator {
+pub(crate) trait CppSemanticAttributeCreator {
     fn do_add(&mut self, ts: TokenStream);
     fn is_enabled(&self) -> bool;
 
@@ -189,6 +189,29 @@ pub trait CppSemanticAttributeCreator {
             layout(#sz, #align, #packed)
         })
     }
+
+    fn location(&mut self,
+        location: Option<&crate::clang::SourceLocation>,
+    ) {
+        if let Some(location) = location {
+            let (file, line, col, byte_offset) = location.location();
+            let file = file.name();
+            if let Some(filename) = file {
+                self.add(quote! {
+                    source_file(#filename)
+                });
+                self.add(quote! {
+                    source_col(#col)
+                });
+                self.add(quote! {
+                    source_line(#line)
+                });
+                self.add(quote! {
+                    byte_offset(#byte_offset)
+                });
+            }
+        }
+    }
 }
 
 pub struct CppSemanticAttributeAdder<'a> {

bindgen/codegen/mod.rs

@@ -973,6 +973,7 @@ impl CodeGenerator for Type {
                 if has_unused_template_args {
                     semantic_annotations.discards_template_param();
                 }
+                semantic_annotations.location(item.location());
                 tokens.append_all(semantic_annotations.result());
 
                 let alias_style = if ctx.options().type_alias.matches(&name) {
@@ -2229,6 +2230,7 @@ impl CodeGenerator for CompInfo {
         if let Some(layout) = layout {
             semantic_annotations.layout(&layout);
         }
+        semantic_annotations.location(item.location());
 
         if ctx.options().rust_features().repr_align {
             if let Some(explicit) = explicit_align {
@@ -3293,6 +3295,7 @@ impl CodeGenerator for Enum {
             }
         }
         semantic_annotations.visibility(self.visibility);
+        semantic_annotations.location(item.location());
 
         // TODO(emilio): Delegate this to the builders?
         match variation {
@@ -4471,6 +4474,7 @@ impl CodeGenerator for Function {
         }
 
         semantic_annotations.visibility(self.visibility());
+        semantic_annotations.location(item.location());
 
         let abi = match signature.abi(ctx, Some(name)) {
             ClangAbi::Known(Abi::ThisCall)