feat: class inductives

DocGen4/Output/Class.lean

@@ -10,8 +10,8 @@ open Lean
 def classInstanceToHtml (name : Name) : HtmlM Html := do
   <li><a href={←declNameToLink name}>{name.toString}</a></li>
 
-def classInstancesToHtml (i : ClassInfo) : HtmlM Html := do
-  let instancesHtml ← i.instances.mapM classInstanceToHtml
+def classInstancesToHtml (instances : Array Name) : HtmlM Html := do
+  let instancesHtml ← instances.mapM classInstanceToHtml
   return <details «class»="instances">
         <summary>Instances</summary>
         <ul>
@@ -20,7 +20,7 @@ def classInstancesToHtml (i : ClassInfo) : HtmlM Html := do
     </details>
 
 def classToHtml (i : ClassInfo) : HtmlM (Array Html) := do
-  (←structureToHtml i.toStructureInfo).push (←classInstancesToHtml i)
+  (←structureToHtml i.toStructureInfo).push (←classInstancesToHtml i.instances)
 
 end Output
 end DocGen4

DocGen4/Output/ClassInductive.lean

@@ -0,0 +1,13 @@
+import DocGen4.Output.Template
+import DocGen4.Output.Class
+import DocGen4.Output.Inductive
+
+
+namespace DocGen4
+namespace Output
+
+def classInductiveToHtml (i : ClassInductiveInfo) : HtmlM (Array Html) := do
+  (←inductiveToHtml i.toInductiveInfo).push (←classInstancesToHtml i.instances)
+
+end Output
+end DocGen4

DocGen4/Output/Module.lean

@@ -9,6 +9,7 @@ import DocGen4.Output.Structure
 import DocGen4.Output.Class
 import DocGen4.Output.Definition
 import DocGen4.Output.Instance
+import DocGen4.Output.ClassInductive
 
 namespace DocGen4
 namespace Output
@@ -77,6 +78,7 @@ def docInfoToHtml (module : Name) (doc : DocInfo) : HtmlM Html := do
   | DocInfo.classInfo i => classToHtml i
   | DocInfo.definitionInfo i => definitionToHtml i
   | DocInfo.instanceInfo i => instanceToHtml i
+  | DocInfo.classInductiveInfo i => classInductiveToHtml i
   | _ => #[]
 
   return <div «class»="decl" id={doc.getName.toString}>

DocGen4/Process.lean

@@ -69,6 +69,10 @@ structure ClassInfo extends StructureInfo where
   instances : Array Name
   deriving Inhabited
 
+structure ClassInductiveInfo extends InductiveInfo where
+  instances : Array Name
+  deriving Inhabited
+
 inductive DocInfo where
 | axiomInfo (info : AxiomInfo) : DocInfo
 | theoremInfo (info : TheoremInfo) : DocInfo
@@ -78,6 +82,7 @@ inductive DocInfo where
 | inductiveInfo (info : InductiveInfo) : DocInfo
 | structureInfo (info : StructureInfo) : DocInfo
 | classInfo (info : ClassInfo) : DocInfo
+| classInductiveInfo (info : ClassInductiveInfo) : DocInfo
   deriving Inhabited
 
 namespace DocInfo
@@ -91,6 +96,7 @@ def getDeclarationRange : DocInfo → DeclarationRange
 | inductiveInfo i => i.declarationRange
 | structureInfo i => i.declarationRange
 | classInfo i => i.declarationRange
+| classInductiveInfo i => i.declarationRange
 
 def lineOrder (l r : DocInfo) : Bool :=
   l.getDeclarationRange.pos.line < r.getDeclarationRange.pos.line
@@ -253,12 +259,19 @@ def StructureInfo.ofInductiveVal (v : InductiveVal) : MetaM StructureInfo := do
       return StructureInfo.mk info #[] parents ⟨ctor.name, ctorType⟩
   | none => panic! s!"{v.name} is not a structure"
 
-def ClassInfo.ofInductiveVal (v : InductiveVal) : MetaM ClassInfo := do
-  let sinfo ← StructureInfo.ofInductiveVal v
-  let fn ← mkConstWithFreshMVarLevels v.name
+def getInstances (className : Name) : MetaM (Array Name) := do
+  let fn ← mkConstWithFreshMVarLevels className
   let (xs, _, _) ← forallMetaTelescopeReducing (← inferType fn)
   let insts ← SynthInstance.getInstances (mkAppN fn xs)
-  return ClassInfo.mk sinfo (insts.map Expr.constName!)
+  insts.map Expr.constName!
+
+def ClassInfo.ofInductiveVal (v : InductiveVal) : MetaM ClassInfo := do
+  let sinfo ← StructureInfo.ofInductiveVal v
+  return ClassInfo.mk sinfo (←getInstances v.name)
+
+def ClassInductiveInfo.ofInductiveVal (v : InductiveVal) : MetaM ClassInductiveInfo := do
+  let info ← InductiveInfo.ofInductiveVal v
+  return ClassInductiveInfo.mk info (←getInstances v.name)
 
 namespace DocInfo
 
@@ -313,6 +326,9 @@ def ofConstant : (Name × ConstantInfo) → MetaM (Option DocInfo) := λ (name,
         some $ classInfo (←ClassInfo.ofInductiveVal i)
       else
         some $ structureInfo (←StructureInfo.ofInductiveVal i)
+    else
+      if isClass env i.name then
+        some $ classInductiveInfo (←ClassInductiveInfo.ofInductiveVal i)
       else
         some $ inductiveInfo (←InductiveInfo.ofInductiveVal i)
   -- we ignore these for now
@@ -329,6 +345,7 @@ def getName : DocInfo → Name
 | inductiveInfo i => i.name
 | structureInfo i => i.name
 | classInfo i => i.name
+| classInductiveInfo i => i.name
 
 def getKind : DocInfo → String
 | axiomInfo _ => "axiom"
@@ -339,6 +356,7 @@ def getKind : DocInfo → String
 | inductiveInfo _ => "inductive"
 | structureInfo _ => "structure"
 | classInfo _ => "class"
+| classInductiveInfo _ => "class"
 
 def getKindDescription : DocInfo → String
 | axiomInfo i => if i.isUnsafe then "unsafe axiom" else "axiom"
@@ -359,6 +377,7 @@ def getKindDescription : DocInfo → String
 | inductiveInfo i => if i.isUnsafe then "unsafe inductive" else "inductive"
 | structureInfo _ => "structure"
 | classInfo _ => "class"
+| classInductiveInfo _ => "class inductive"
 
 def getType : DocInfo → CodeWithInfos
 | axiomInfo i => i.type
@@ -369,6 +388,7 @@ def getType : DocInfo → CodeWithInfos
 | inductiveInfo i => i.type
 | structureInfo i => i.type
 | classInfo i => i.type
+| classInductiveInfo i => i.type
 
 def getArgs : DocInfo → Array Arg
 | axiomInfo i => i.args
@@ -379,6 +399,7 @@ def getArgs : DocInfo → Array Arg
 | inductiveInfo i => i.args
 | structureInfo i => i.args
 | classInfo i => i.args
+| classInductiveInfo i => i.args
 
 end DocInfo