[gobject-introspection] Add a floating alias for none

[Johan Dahlin <johan src gnome org>]

commit 699ad0fec427c79bec1c41b2cf8e2441b9b959bc
Author: Johan Dahlin <johan gnome org>
Date:   Fri Nov 25 12:09:51 2011 -0200

    Add a floating alias for none
    
    https://bugzilla.gnome.org/show_bug.cgi?id=657202

 giscanner/annotationparser.py             |    4 +++-
 giscanner/maintransformer.py              |   13 ++++++++++---
 tests/scanner/Annotation-1.0-expected.gir |    7 +++++++
 tests/scanner/annotation.c                |   13 ++++++++++++-
 tests/scanner/annotation.h                |    2 ++
 5 files changed, 34 insertions(+), 5 deletions(-)
---
diff --git a/giscanner/annotationparser.py b/giscanner/annotationparser.py
index 243b6af..e0a7cec 100644
--- a/giscanner/annotationparser.py
+++ b/giscanner/annotationparser.py
@@ -111,6 +111,7 @@ OPT_SCOPE_NOTIFIED = 'notified'
 OPT_TRANSFER_NONE = 'none'
 OPT_TRANSFER_CONTAINER = 'container'
 OPT_TRANSFER_FULL = 'full'
+OPT_TRANSFER_FLOATING = 'floating'
 
 
 class DocBlock(object):
@@ -346,7 +347,8 @@ class DocTag(object):
                     n_params=1,
                     choices=[OPT_TRANSFER_FULL,
                              OPT_TRANSFER_CONTAINER,
-                             OPT_TRANSFER_NONE])
+                             OPT_TRANSFER_NONE,
+                             OPT_TRANSFER_FLOATING])
             elif option == OPT_TYPE:
                 self._validate_option('type', value, required=True,
                                       n_params=1)
diff --git a/giscanner/maintransformer.py b/giscanner/maintransformer.py
index 5b1ffb7..7358600 100644
--- a/giscanner/maintransformer.py
+++ b/giscanner/maintransformer.py
@@ -32,7 +32,8 @@ from .annotationparser import (OPT_ALLOW_NONE, OPT_ARRAY, OPT_ATTRIBUTE,
                                OPT_TYPE, OPT_CLOSURE, OPT_DESTROY, OPT_TRANSFER, OPT_SKIP,
                                OPT_FOREIGN, OPT_ARRAY_FIXED_SIZE,
                                OPT_ARRAY_LENGTH, OPT_ARRAY_ZERO_TERMINATED,
-                               OPT_CONSTRUCTOR, OPT_METHOD)
+                               OPT_CONSTRUCTOR, OPT_METHOD,
+                               OPT_TRANSFER_NONE, OPT_TRANSFER_FLOATING)
 from .annotationparser import AnnotationParser
 from .transformer import TransformerException
 from .utils import to_underscores, to_underscores_noprefix
@@ -569,7 +570,10 @@ usage is void (*_gtk_reserved1)(void);"""
 
         transfer_tag = options.get(OPT_TRANSFER)
         if transfer_tag and transfer_tag.length() == 1:
-            node.transfer = transfer_tag.one()
+            transfer = transfer_tag.one()
+            if transfer == OPT_TRANSFER_FLOATING:
+                transfer = OPT_TRANSFER_NONE
+            node.transfer = transfer
 
         self._adjust_container_type(parent, node, options)
 
@@ -755,7 +759,10 @@ usage is void (*_gtk_reserved1)(void);"""
             return
         transfer_tag = block.get(OPT_TRANSFER)
         if transfer_tag is not None:
-            prop.transfer = transfer_tag.value
+            transfer = transfer_tag.value
+            if transfer == OPT_TRANSFER_FLOATING:
+                transfer = OPT_TRANSFER_NONE
+            prop.transfer = transfer
         else:
             prop.transfer = self._get_transfer_default(parent, prop)
         type_tag = block.get(TAG_TYPE)
diff --git a/tests/scanner/Annotation-1.0-expected.gir b/tests/scanner/Annotation-1.0-expected.gir
index 4449604..88b9ea4 100644
--- a/tests/scanner/Annotation-1.0-expected.gir
+++ b/tests/scanner/Annotation-1.0-expected.gir
@@ -835,6 +835,13 @@ detection, and fixing it via annotations.</doc>
         <type name="GObject.Object" c:type="GObject*"/>
       </return-value>
     </function>
+    <function name="transfer_floating"
+              c:identifier="annotation_transfer_floating">
+      <return-value transfer-ownership="none">
+        <doc xml:whitespace="preserve">A floating object</doc>
+        <type name="GObject.Object" c:type="GObject*"/>
+      </return-value>
+    </function>
     <function name="versioned"
               c:identifier="annotation_versioned"
               version="0.6">
diff --git a/tests/scanner/annotation.c b/tests/scanner/annotation.c
index 07e5a34..f28befa 100644
--- a/tests/scanner/annotation.c
+++ b/tests/scanner/annotation.c
@@ -813,7 +813,7 @@ annotation_space_after_comment_bug631690 (void)
 }
 
 /**
- * annotation_return_filename
+ * annotation_return_filename:
  *
  * Returns: (type filename): An annotated filename
  */
@@ -822,3 +822,14 @@ annotation_return_filename (void)
 {
   return "a utf-8 filename";
 }
+
+/**
+ * annotation_transfer_floating:
+ *
+ * Returns: (transfer floating): A floating object
+ */
+GObject *
+annotation_transfer_floating(void)
+{
+  return NULL;
+}
diff --git a/tests/scanner/annotation.h b/tests/scanner/annotation.h
index 8bfbfd2..b3b4bd4 100644
--- a/tests/scanner/annotation.h
+++ b/tests/scanner/annotation.h
@@ -169,6 +169,8 @@ void annotation_space_after_comment_bug631690 (void);
 
 gchar* annotation_return_filename (void);
 
+GObject * annotation_transfer_floating(void);
+
 /* This one we can handle properly */
 #define ANNOTATION_CALCULATED_DEFINE (10 * 10)