Merge pull request #938 from p4lang/final-changes-1.2.2

Update change log and version number for version 1.2.2

Author: jnfoster

p4-16/spec/P4-16-spec.mdk

@@ -1,5 +1,5 @@
 Title : P4~16~ Language Specification
-Title Note: version 1.2.1
+Title Note: version 1.2.2
 Title Footer: &date;
 Author: The P4 Language Consortium
 Heading depth: 5
@@ -8080,25 +8080,26 @@ The P4 compiler should provide:
 |           |               | semantics of invalid header stacks; clarified initialization      |
 |           |               | semantics; fixed several small issues in grammar.                 |
 |-----|-----|-----|
+| 1.2.2     | May 17, 2021 | 
+|-----|-----|-----|
 
 ## Summary of changes made in version 1.2.2
 
-* support for tuple field access (Section [#sec-tuple-exprs]).
-* Support for generic structures (Section [#sec-type-spec]).
-* Generalize `switch` statements to allow expressions with integer,
-  `enum`, or `error` types (Section [#sec-switch-stmt]).
+* Fixed several typos and inconsistencies in grammar (Section [#sec-grammar]).
+* Clarified that `default_action` is `NoAction` if otherwise unspecified (Section [#sec-tables]).
+* Added support for accessing tuple fields (Section [#sec-tuple-exprs]).
+* Added support for generic structures (Section [#sec-type-spec]).
+* Generalize `switch` statements to allow expressions with integer, `enum`, or `error` types (Section [#sec-switch-stmt]).
 * Clarified representation of Booleans in headers (Section [#sec-header-types]).
 * Clarified representation of empty types (Section [#sec-uninitialized-values-and-writing-invalid-headers]).
-* Clarify that action data can be specified by the control plane,
-  `default_action` table property, or `const entries` table property (Section [#sec-actions]).
-* Support for more kinds of enumerations (Section [#sec-enum-types]).
-* Specify the types of expressions permitted as an index to a header stack (Section [#sec-expr-hs]).
-* Add description of abstract methods (Section [#sec-abstract-methods]).
-* Allow conditional statements in parsers
-* Allow casts from `int` to `bool`
-* Allow 0-width bitstrings, varbits (Section [#sec-uninitialized-values-and-writing-invalid-headers]).
-* Allow empty statements in parsers
-* Eliminate annotations on `const` entries in grammar
+* Clarified that action data can be specified by the control plane, `default_action` table property, or `const entries` table property (Section [#sec-actions]).
+* Added support for additional enumeration types (Section [#sec-enum-types]).
+* Specified the types of expressions that may be used as indexes for header stacks (Section [#sec-expr-hs]).
+* Added description of abstract methods (Section [#sec-abstract-methods]).
+* Added support for conditional statements and empty statements in parsers (Section [#sec-parsers]).
+* Added support for casts from `int` to `bool`.
+* Added support for 0-width bitstrings and varbits (Section [#sec-uninitialized-values-and-writing-invalid-headers]).
+* Eliminated annotations on `const` entries in grammar.
 
 ## Summary of changes made in version 1.2.1