Reduce the restrictions on members whose names match auto-generated p…

…roperties

Fixes #49.

index.bs

@@ -3981,12 +3981,19 @@ the iterator objects returned by <code class="idl">entries</code>,
 <code class="idl">keys</code>, <code class="idl">values</code>, and {{@@iterator}} are
 actual [=array iterator objects=].
 
-Interfaces with iterable declarations must not
-have any [=interface members=]
-named "<code>entries</code>", "<code>forEach</code>",
-"<code>keys</code>", or "<code>values</code>",
-or have any [=inherited interfaces=]
-that have [=members=] with these names.
+Interfaces with iterable declarations must not have any [=regular attributes=] or [=constants=]
+named
+"<code>entries</code>",
+"<code>forEach</code>",
+"<code>keys</code>", or
+"<code>values</code>",
+or have any [=inherited interfaces=] that have [=regular operations=], [=regular attributes=] or
+[=constants=] with these names.
+
+Note: Operations with these names are allowed on interfaces with iterable declarations and will
+prevent the default implementation of these methods being added to the
+[=interface prototype object=] in the ECMAScript language binding.
+This allows the default behavior of these operations to be overridden.
 
 <div class="example">
 
@@ -4132,23 +4139,30 @@ keyword is used, this includes <code class="idl">entries</code>,
 For read–write maplikes, it also includes <code class="idl">clear</code>,
 <code class="idl">delete</code>, and <code class="idl">set</code> methods.
 
-Maplike interfaces must not
-have any [=interface members=]
-named "<code>entries</code>", "<code>forEach</code>",
-"<code>get</code>", "<code>has</code>",
-"<code>keys</code>", "<code>size</code>", or
+Maplike interfaces must not have any [=regular attributes=] or [=constants=] named
+"<code>entries</code>",
+"<code>forEach</code>",
+"<code>get</code>",
+"<code>has</code>",
+"<code>keys</code>",
+"<code>size</code>", or
 "<code>values</code>",
-or have any [=inherited interfaces=]
-that have [=members=] with these names.
-Read–write maplike interfaces must not
-have any [=attributes=]
-or [=constants=] named
-"<code>clear</code>", "<code>delete</code>",
-or "<code>set</code>", or have any [=inherited interfaces=]
-that have [=attributes=] or [=constants=] with these names.
-
-Note: Operations named "<code>clear</code>", "<code>delete</code>",
-or "<code>set</code>" are allowed on read–write maplike
+or have any [=inherited interfaces=] that have [=regular operations=], [=regular attributes=] or
+[=constants=] with these names.
+
+Maplike interfaces must not have any [=regular operations=] or [=constants=] named
+"<code>size</code>",
+or have any [=inherited interfaces=] that have [=regular operations=], [=regular attributes=] or
+[=constants=] with that name.
+
+Read–write maplike interfaces must not have any [=regular attributes=] or [=constants=] named
+"<code>clear</code>",
+"<code>delete</code>", or
+"<code>set</code>",
+or have any [=inherited interfaces=] that have [=regular operations=], [=regular attributes=] or
+[=constants=] with these names.
+
+Note: Operations with these names are allowed on maplike
 interfaces and will prevent the default implementation of these methods being
 added to the interface prototype object in the ECMAScript language binding.
 This allows the default behavior of these operations to be overridden.
@@ -4226,22 +4240,28 @@ keyword is used, this includes <code class="idl">entries</code>,
 For read–write setlikes, it also includes <code class="idl">add</code>,
 <code class="idl">clear</code>, and <code class="idl">delete</code> methods.
 
-Setlike interfaces must not
-have any [=interface members=]
-named "<code>entries</code>", "<code>forEach</code>",
-"<code>has</code>", "<code>keys</code>",
-"<code>size</code>", or "<code>values</code>",
-or have any [=inherited interfaces=]
-that have [=members=] with these names.
-Read–write setlike interfaces must not
-have any [=attributes=]
-or [=constants=] named
-"<code>add</code>", "<code>clear</code>",
-or "<code>delete</code>", or have any [=inherited interfaces=]
-that have [=attributes=] or [=constants=] with these names.
-
-Note: Operations named "<code>add</code>", "<code>clear</code>",
-or "<code>delete</code>" are allowed on read–write setlike
+Setlike interfaces must not have any [=regular attributes=] or [=constants=] named
+"<code>entries</code>",
+"<code>forEach</code>",
+"<code>has</code>",
+"<code>keys</code>", or
+"<code>values</code>",
+or have any [=inherited interfaces=] that have [=regular operations=], [=regular attributes=] or
+[=constants=] with these names.
+
+Setlike interfaces must not have any [=regular operations=] or [=constants=] named
+"<code>size</code>",
+or have any [=inherited interfaces=] that have [=regular operations=], [=regular attributes=] or
+[=constants=] with that name.
+
+Read–write setlike interfaces must not have any [=regular attributes=] or [=constants=] named
+"<code>add</code>",
+"<code>clear</code>", or
+"<code>delete</code>",
+or have any [=inherited interfaces=] that have [=regular operations=], [=regular attributes=] or
+[=constants=] with these names.
+
+Note: Operations with these names are allowed on setlike
 interfaces and will prevent the default implementation of these methods being
 added to the interface prototype object in the ECMAScript language binding.
 This allows the default behavior of these operations to be overridden.
@@ -11579,13 +11599,14 @@ if the interface has a [=setlike declaration=].
 
 <h5 id="es-forEach">forEach</h5>
 
-If the [=interface=] has any of the following:
+If the [=interface=] does not declare a [=regular operation=] with [=identifier=]
+<code class="idl">forEach</code> and has any of the following:
 
 *   an [=iterable declaration=]
 *   a [=maplike declaration=]
 *   a [=setlike declaration=]
 
-then a <code class="idl">forEach</code> data property must exist with attributes
+<code class="idl">forEach</code> data property must exist with attributes
 { \[[Writable]]: <emu-val>true</emu-val>, \[[Enumerable]]: <emu-val>true</emu-val>, \[[Configurable]]: <emu-val>true</emu-val> }
 and whose value is a [=function object=].
 
@@ -11683,7 +11704,8 @@ property is the String value "<code>forEach</code>".
 
 <h5 id="es-iterable-entries">entries</h5>
 
-If the [=interface=] has an [=iterable declaration=],
+If the [=interface=] does not declare a [=regular operation=] with [=identifier=]
+<code class="idl">entries</code> and has an [=iterable declaration=],
 then an <code class="idl">entries</code> data property must exist with attributes
 { \[[Writable]]: <emu-val>true</emu-val>, \[[Enumerable]]: <emu-val>true</emu-val>, \[[Configurable]]: <emu-val>true</emu-val> }
 and whose value is a [=function object=].
@@ -11704,7 +11726,8 @@ the value of the {{@@iterator}} property.
 
 <h5 id="es-iterable-keys">keys</h5>
 
-If the [=interface=] has an [=iterable declaration=],
+If the [=interface=] does not declare a [=regular operation=] with [=identifier=]
+<code class="idl">keys</code> and has an [=iterable declaration=],
 then a <code class="idl">keys</code> data property must exist with attributes
 { \[[Writable]]: <emu-val>true</emu-val>, \[[Enumerable]]: <emu-val>true</emu-val>, \[[Configurable]]: <emu-val>true</emu-val> }
 and whose value is a [=function object=].
@@ -11745,8 +11768,8 @@ The value of the [=function object=]’s <code class="idl">name</code> property
 
 <h5 id="es-iterable-values">values</h5>
 
-If the [=interface=] has an
-[=iterable declaration=],
+If the [=interface=] does not declare a [=regular operation=] with [=identifier=]
+<code class="idl">values</code> and has an [=iterable declaration=],
 then a <code class="idl">values</code> data property must exist
 with attributes { \[[Writable]]: <emu-val>true</emu-val>, \[[Enumerable]]: <emu-val>true</emu-val>, \[[Configurable]]: <emu-val>true</emu-val> }
 and whose value is a [=function object=].
@@ -11919,7 +11942,8 @@ These additional properties are described in the sub-sections below.
 
 <h5 id="es-map-size">size</h5>
 
-There must exist a <code class="idl">size</code> property on
+If |A| does not declare a [=regular attribute=] with [=identifier=]
+<code class="idl">size</code>, there must exist a <code class="idl">size</code> property on
 |A|’s [=interface prototype object=]
 with the following characteristics:
 
@@ -11950,7 +11974,8 @@ with the following characteristics:
 
 <h5 id="es-map-entries">entries</h5>
 
-An <code class="idl">entries</code> data property must exist on
+If |A| does not declare a [=regular operation=] with [=identifier=]
+<code class="idl">entries</code>, there must exist an <code class="idl">entries</code> property on
 |A|’s [=interface prototype object=]
 with attributes { \[[Writable]]: <emu-val>true</emu-val>, \[[Enumerable]]: <emu-val>false</emu-val>, \[[Configurable]]: <emu-val>true</emu-val> }
 and whose value is the [=function object=] that is the value of
@@ -11959,7 +11984,9 @@ the {{@@iterator}} property.
 
 <h5 id="es-map-keys-values">keys and values</h5>
 
-For both of <code class="idl">keys</code> and <code class="idl">values</code>, there must exist a data property with that name on
+For both of <code class="idl">keys</code> and <code class="idl">values</code>,
+if |A| does not declare a [=regular operation=] with that name as its [=identifier=],
+there must exist a data property with that name on
 |A|’s [=interface prototype object=]
 with the following characteristics:
 
@@ -11973,7 +12000,9 @@ The value of the [=function object=]’s <code class="idl">name</code> property
 
 <h5 id="es-map-get-has">get and has</h5>
 
-For both of <code class="idl">get</code> and <code class="idl">has</code>, there must exist a data property with that name on
+For both of <code class="idl">get</code> and <code class="idl">has</code>,
+if |A| does not declare a [=regular operation=] with that name as its [=identifier=],
+there must exist a data property with that name on
 |A|’s [=interface prototype object=] with the following characteristics:
 
 *   The property has attributes
@@ -12007,7 +12036,7 @@ The value of the [=function object=]’s <code class="idl">name</code> property
 
 <h5 id="es-map-clear">clear</h5>
 
-If |A| does not declare a [=member=]
+If |A| does not declare a [=regular operation=]
 with identifier "<code>clear</code>", and
 |A| was declared with a read–write maplike declaration,
 then a <code class="idl">clear</code> data property with the following characteristics
@@ -12024,7 +12053,7 @@ The value of the [=function object=]’s <code class="idl">name</code> property
 
 <h5 id="es-map-delete">delete</h5>
 
-If |A| does not declare a [=member=]
+If |A| does not declare a [=regular operation=]
 with identifier "<code>delete</code>", and
 |A| was declared with a read–write maplike declaration,
 then a <code class="idl">delete</code> data property with the following characteristics
@@ -12059,7 +12088,7 @@ The value of the [=function object=]’s <code class="idl">name</code> property
 
 <h5 id="es-map-set">set</h5>
 
-If |A| does not declare a [=member=] with identifier "<code>set</code>",
+If |A| does not declare a [=regular operation=] with identifier "<code>set</code>",
 and |A| was declared with a read–write maplike declaration,
 then a <code class="idl">set</code> data property with the following characteristics
 must exist on |A|’s [=interface prototype object=]:
@@ -12136,7 +12165,9 @@ These additional properties are described in the sub-sections below.
 
 <h5 id="es-set-size">size</h5>
 
-A <code class="idl">size</code> property must exist on |A|’s [=interface prototype object=]
+If |A| does not declare a [=regular attribute=] with [=identifier=]
+<code class="idl">size</code>, there must exist a <code class="idl">size</code> property on
+|A|’s [=interface prototype object=]
 with the following characteristics:
 
 *   The property has attributes { \[[Get]]: |G|, \[[Enumerable]]: <emu-val>false</emu-val>, \[[Configurable]]: <emu-val>true</emu-val> },
@@ -12165,15 +12196,18 @@ with the following characteristics:
 
 <h5 id="es-set-values">values</h5>
 
-A <code class="idl">values</code> data property must exist on |A|’s [=interface prototype object=]
+If |A| does not declare a [=regular operation=] with [=identifier=]
+<code class="idl">values</code>, there must exist an <code class="idl">values</code> property on
 with attributes { \[[Writable]]: <emu-val>true</emu-val>, \[[Enumerable]]: <emu-val>false</emu-val>, \[[Configurable]]: <emu-val>true</emu-val> }
 and whose value is the [=function object=] that is the value of
 the {{@@iterator}} property.
 
 
 <h5 id="es-set-entries-keys">entries and keys</h5>
 
-For both of <code class="idl">entries</code> and <code class="idl">keys</code>, there must exist a data property with that name on
+For both of <code class="idl">entries</code> and <code class="idl">keys</code>,
+if |A| does not declare a [=regular operation=] with that name as its [=identifier=],
+there must exist a data property with that name on
 |A|’s [=interface prototype object=] with the following characteristics:
 
 *   The property has attributes
@@ -12190,7 +12224,9 @@ the String value "<code>entries</code>" or "<code>keys</code>", correspondingly.
 
 <h5 id="es-set-has">has</h5>
 
-There must exist a <code class="idl">has</code> data property on |A|’s [=interface prototype object=]
+If |A| does not declare a [=regular operation=] with [=identifier=]
+<code class="idl">has</code>, there must exist an <code class="idl">has</code> property on
+|A|’s [=interface prototype object=]
 with the following characteristics:
 
 *   The property has attributes