Autodoc usingnamespace (#15216)

* autodoc: init support for usingnamespace decls

* autodoc: don't build autodoc when building zig2.c

* autodoc: usingnamespace decls support in frontend (#15203)

* autodoc: init support for usingnamespace decls

* autodoc: usingnamespace decls support in frontend

---------

Co-authored-by: Krzysztof Wolicki <46651553+der-teufel-programming@users.noreply.github.com>

lib/docs/main.js

@@ -2586,7 +2586,8 @@ const NAV_MODES = {
     fnsList,
     varsList,
     valsList,
-    testsList
+    testsList,
+    unsList
   ) {
     for (let i = 0; i < decls.length; i += 1) {
       let decl = getDecl(decls[i]);
@@ -2644,6 +2645,10 @@ const NAV_MODES = {
           valsList.push(decl);
         }
       }
+
+      if (decl.is_uns) {
+        unsList.push(decl);
+      }
     }
   }
 
@@ -2669,6 +2674,8 @@ const NAV_MODES = {
 
     let testsList = [];
 
+    let unsList = [];
+
     categorizeDecls(
       container.pubDecls,
       typesList,
@@ -2677,7 +2684,8 @@ const NAV_MODES = {
       fnsList,
       varsList,
       valsList,
-      testsList
+      testsList,
+      unsList
     );
     if (curNav.showPrivDecls)
       categorizeDecls(
@@ -2688,9 +2696,40 @@ const NAV_MODES = {
         fnsList,
         varsList,
         valsList,
-        testsList
+        testsList,
+        unsList
       );
 
+    while (unsList.length > 0) {
+      let uns = unsList.shift();
+      let declValue = resolveValue(uns.value);
+      if (!("type" in declValue.expr)) continue;
+      let uns_container = getType(declValue.expr.type);
+      categorizeDecls(
+        uns_container.pubDecls,
+        typesList,
+        namespacesList,
+        errSetsList,
+        fnsList,
+        varsList,
+        valsList,
+        testsList,
+        unsList
+      );
+      if (curNav.showPrivDecls)
+        categorizeDecls(
+          uns_container.privDecls,
+          typesList,
+          namespacesList,
+          errSetsList,
+          fnsList,
+          varsList,
+          valsList,
+          testsList,
+          unsList
+        );
+    }
+
     typesList.sort(byNameProperty);
     namespacesList.sort(byNameProperty);
     errSetsList.sort(byNameProperty);
@@ -3090,7 +3129,7 @@ const NAV_MODES = {
   function findSubDecl(parentTypeOrDecl, childName) {
     let parentType = parentTypeOrDecl;
     {
-      // Generic functions / resorlving decls
+      // Generic functions / resolving decls
       if ("value" in parentType) {
         const rv = resolveValue(parentType.value);
         if ("type" in rv.expr) {
@@ -3116,20 +3155,35 @@ const NAV_MODES = {
       }
     }
 
-    if (!parentType.pubDecls) return null;
+    if (parentType.pubDecls) {
       for (let i = 0; i < parentType.pubDecls.length; i += 1) {
         let declIndex = parentType.pubDecls[i];
         let childDecl = getDecl(declIndex);
         if (childDecl.name === childName) {
           return childDecl;
+        } else if (childDecl.is_uns) {
+          let declValue = resolveValue(childDecl.value);
+          if (!("type" in declValue.expr)) continue;
+          let uns_container = getType(declValue.expr.type);
+          let uns_res = findSubDecl(uns_container, childName);
+          if (uns_res !== null) return uns_res;
         }
       }
-    if (!parentType.privDecls) return null;
+    }
+
+    if (parentType.privDecls) {
       for (let i = 0; i < parentType.privDecls.length; i += 1) {
         let declIndex = parentType.privDecls[i];
         let childDecl = getDecl(declIndex);
         if (childDecl.name === childName) {
           return childDecl;
+        } else if (childDecl.is_uns) {
+          let declValue = resolveValue(childDecl.value);
+          if (!("type" in declValue.expr)) continue;
+          let uns_container = getType(declValue.expr.type);
+          let uns_res = findSubDecl(uns_container, childName);
+          if (uns_res !== null) return uns_res;
+        }
       }
     }
     return null;
@@ -3908,6 +3962,7 @@ const NAV_MODES = {
       src: decl[2],
       value: decl[3],
       decltest: decl[4],
+      is_uns: decl[5],
     };
   }
 

src/Compilation.zig

@@ -2052,7 +2052,7 @@ pub fn update(comp: *Compilation, main_progress_node: *std.Progress.Node) !void
         return;
     }
 
-    if (!build_options.only_c) {
+    if (!build_options.only_c and !build_options.omit_pkg_fetching_code) {
         if (comp.emit_docs) |doc_location| {
             if (comp.bin_file.options.module) |module| {
                 var autodoc = Autodoc.init(module, doc_location);

src/Zir.zig

@@ -3667,6 +3667,7 @@ pub const DeclIterator = struct {
     pub const Item = struct {
         name: [:0]const u8,
         sub_index: u32,
+        flags: u4,
     };
 
     pub fn next(it: *DeclIterator) ?Item {
@@ -3691,6 +3692,7 @@ pub const DeclIterator = struct {
         return Item{
             .sub_index = sub_index,
             .name = name,
+            .flags = flags,
         };
     }
 };