qapi: Simplify QAPISchemaIfCond's interface for generating C

QAPISchemaIfCond.cgen() is only ever used like

    gen_if(ifcond.cgen())

and

    gen_endif(ifcond.cgen())

Simplify to

    ifcond.gen_if()

and

    ifcond.gen_endif()

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20210831123809.1107782-2-armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
[Import statements tidied up with isort]

scripts/qapi/gen.py

@@ -24,8 +24,6 @@
 from .common import (
     c_fname,
     c_name,
-    gen_endif,
-    gen_if,
     guardend,
     guardstart,
     mcgen,
@@ -95,9 +93,9 @@ def _wrap_ifcond(ifcond: QAPISchemaIfCond, before: str, after: str) -> str:
     if added[0] == '\n':
         out += '\n'
         added = added[1:]
-    out += gen_if(ifcond.cgen())
+    out += ifcond.gen_if()
     out += added
-    out += gen_endif(ifcond.cgen())
+    out += ifcond.gen_endif()
     return out
 
 

scripts/qapi/introspect.py

@@ -22,12 +22,7 @@
     Union,
 )
 
-from .common import (
-    c_name,
-    gen_endif,
-    gen_if,
-    mcgen,
-)
+from .common import c_name, mcgen
 from .gen import QAPISchemaMonolithicCVisitor
 from .schema import (
     QAPISchema,
@@ -124,10 +119,10 @@ def indent(level: int) -> str:
         if obj.comment:
             ret += indent(level) + f"/* {obj.comment} */\n"
         if obj.ifcond.is_present():
-            ret += gen_if(obj.ifcond.cgen())
+            ret += obj.ifcond.gen_if()
         ret += _tree_to_qlit(obj.value, level)
         if obj.ifcond.is_present():
-            ret += '\n' + gen_endif(obj.ifcond.cgen())
+            ret += '\n' + obj.ifcond.gen_endif()
         return ret
 
     ret = ''

scripts/qapi/schema.py

@@ -24,6 +24,8 @@
     c_name,
     cgen_ifcond,
     docgen_ifcond,
+    gen_endif,
+    gen_if,
 )
 from .error import QAPIError, QAPISemError, QAPISourceError
 from .expr import check_exprs
@@ -34,9 +36,15 @@ class QAPISchemaIfCond:
     def __init__(self, ifcond=None):
         self.ifcond = ifcond or {}
 
-    def cgen(self):
+    def _cgen(self):
         return cgen_ifcond(self.ifcond)
 
+    def gen_if(self):
+        return gen_if(self._cgen())
+
+    def gen_endif(self):
+        return gen_endif(self._cgen())
+
     def docgen(self):
         return docgen_ifcond(self.ifcond)
 

scripts/qapi/types.py

@@ -15,13 +15,7 @@
 
 from typing import List, Optional
 
-from .common import (
-    c_enum_const,
-    c_name,
-    gen_endif,
-    gen_if,
-    mcgen,
-)
+from .common import c_enum_const, c_name, mcgen
 from .gen import QAPISchemaModularCVisitor, ifcontext
 from .schema import (
     QAPISchema,
@@ -51,13 +45,13 @@ def gen_enum_lookup(name: str,
 ''',
                 c_name=c_name(name))
     for memb in members:
-        ret += gen_if(memb.ifcond.cgen())
+        ret += memb.ifcond.gen_if()
         index = c_enum_const(name, memb.name, prefix)
         ret += mcgen('''
         [%(index)s] = "%(name)s",
 ''',
                      index=index, name=memb.name)
-        ret += gen_endif(memb.ifcond.cgen())
+        ret += memb.ifcond.gen_endif()
 
     ret += mcgen('''
     },
@@ -81,12 +75,12 @@ def gen_enum(name: str,
                 c_name=c_name(name))
 
     for memb in enum_members:
-        ret += gen_if(memb.ifcond.cgen())
+        ret += memb.ifcond.gen_if()
         ret += mcgen('''
     %(c_enum)s,
 ''',
                      c_enum=c_enum_const(name, memb.name, prefix))
-        ret += gen_endif(memb.ifcond.cgen())
+        ret += memb.ifcond.gen_endif()
 
     ret += mcgen('''
 } %(c_name)s;
@@ -126,7 +120,7 @@ def gen_array(name: str, element_type: QAPISchemaType) -> str:
 def gen_struct_members(members: List[QAPISchemaObjectTypeMember]) -> str:
     ret = ''
     for memb in members:
-        ret += gen_if(memb.ifcond.cgen())
+        ret += memb.ifcond.gen_if()
         if memb.optional:
             ret += mcgen('''
     bool has_%(c_name)s;
@@ -136,7 +130,7 @@ def gen_struct_members(members: List[QAPISchemaObjectTypeMember]) -> str:
     %(c_type)s %(c_name)s;
 ''',
                      c_type=memb.type.c_type(), c_name=c_name(memb.name))
-        ret += gen_endif(memb.ifcond.cgen())
+        ret += memb.ifcond.gen_endif()
     return ret
 
 
@@ -159,7 +153,7 @@ def gen_object(name: str, ifcond: QAPISchemaIfCond,
     ret += mcgen('''
 
 ''')
-    ret += gen_if(ifcond.cgen())
+    ret += ifcond.gen_if()
     ret += mcgen('''
 struct %(c_name)s {
 ''',
@@ -193,7 +187,7 @@ def gen_object(name: str, ifcond: QAPISchemaIfCond,
     ret += mcgen('''
 };
 ''')
-    ret += gen_endif(ifcond.cgen())
+    ret += ifcond.gen_endif()
 
     return ret
 
@@ -220,13 +214,13 @@ def gen_variants(variants: QAPISchemaVariants) -> str:
     for var in variants.variants:
         if var.type.name == 'q_empty':
             continue
-        ret += gen_if(var.ifcond.cgen())
+        ret += var.ifcond.gen_if()
         ret += mcgen('''
         %(c_type)s %(c_name)s;
 ''',
                      c_type=var.type.c_unboxed_type(),
                      c_name=c_name(var.name))
-        ret += gen_endif(var.ifcond.cgen())
+        ret += var.ifcond.gen_endif()
 
     ret += mcgen('''
     } u;

scripts/qapi/visit.py

@@ -18,8 +18,6 @@
 from .common import (
     c_enum_const,
     c_name,
-    gen_endif,
-    gen_if,
     indent,
     mcgen,
 )
@@ -79,7 +77,7 @@ def gen_visit_object_members(name: str,
 
     for memb in members:
         deprecated = 'deprecated' in [f.name for f in memb.features]
-        ret += gen_if(memb.ifcond.cgen())
+        ret += memb.ifcond.gen_if()
         if memb.optional:
             ret += mcgen('''
     if (visit_optional(v, "%(name)s", &obj->has_%(c_name)s)) {
@@ -112,7 +110,7 @@ def gen_visit_object_members(name: str,
             ret += mcgen('''
     }
 ''')
-        ret += gen_endif(memb.ifcond.cgen())
+        ret += memb.ifcond.gen_endif()
 
     if variants:
         tag_member = variants.tag_member
@@ -126,7 +124,7 @@ def gen_visit_object_members(name: str,
         for var in variants.variants:
             case_str = c_enum_const(tag_member.type.name, var.name,
                                     tag_member.type.prefix)
-            ret += gen_if(var.ifcond.cgen())
+            ret += var.ifcond.gen_if()
             if var.type.name == 'q_empty':
                 # valid variant and nothing to do
                 ret += mcgen('''
@@ -142,7 +140,7 @@ def gen_visit_object_members(name: str,
                              case=case_str,
                              c_type=var.type.c_name(), c_name=c_name(var.name))
 
-            ret += gen_endif(var.ifcond.cgen())
+            ret += var.ifcond.gen_endif()
         ret += mcgen('''
     default:
         abort();
@@ -228,7 +226,7 @@ def gen_visit_alternate(name: str, variants: QAPISchemaVariants) -> str:
                 c_name=c_name(name))
 
     for var in variants.variants:
-        ret += gen_if(var.ifcond.cgen())
+        ret += var.ifcond.gen_if()
         ret += mcgen('''
     case %(case)s:
 ''',
@@ -254,7 +252,7 @@ def gen_visit_alternate(name: str, variants: QAPISchemaVariants) -> str:
         ret += mcgen('''
         break;
 ''')
-        ret += gen_endif(var.ifcond.cgen())
+        ret += var.ifcond.gen_endif()
 
     ret += mcgen('''
     case QTYPE_NONE: