Enable inheritance diagrams.

cranelift/docs/conf.py

@@ -38,6 +38,8 @@ extensions = [
     'sphinx.ext.todo',
     'sphinx.ext.mathjax',
     'sphinx.ext.ifconfig',
+    'sphinx.ext.graphviz',
+    'sphinx.ext.inheritance_diagram',
     'cton_domain',
     'cton_lexer',
 ]
@@ -293,3 +295,10 @@ texinfo_documents = [
 
 # If true, do not generate a @detailmenu in the "Top" node's menu.
 #texinfo_no_detailmenu = False
+
+
+# -- Options for Graphviz -------------------------------------------------
+
+graphviz_output_format = 'svg'
+
+inheritance_graph_attrs = dict(rankdir='TD')

cranelift/docs/metaref.rst

@@ -13,21 +13,28 @@ directory that has a global variable called ``instructions``. The basic
 Cretonne instruction set described in :doc:`langref` is defined by the Python
 module :mod:`cretonne.instrs`.
 
+.. module:: cretonne
+
 Types
 =====
 
 Concrete value types are represented as instances of :class:`cretonne.Type`. There are
 subclasses to represent scalar and vector types.
 
-.. autoclass:: cretonne.Type
-.. autoclass:: cretonne.ScalarType
+.. inheritance-diagram:: Type ScalarType VectorType IntType FloatType
+    :parts: 1
+.. autoclass:: Type
+.. autoclass:: ScalarType
     :members:
-.. autoclass:: cretonne.VectorType
+.. autoclass:: VectorType
     :members:
-.. autoclass:: cretonne.IntType
+.. autoclass:: IntType
     :members:
-.. autoclass:: cretonne.FloatType
+.. autoclass:: FloatType
     :members:
+
+Predefined types
+----------------
 .. automodule:: cretonne.types
     :members: