[es6] implement destructuring assignment [clean diff]

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index d47a00bd37f64345c6253d5bedf2b950d50f18b1..9a4c7192bdf430afe3699e8ab5a631771ce8e222 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -190,17 +190,18 @@ DEFINE_BOOL(legacy_const, true, "legacy semantics for const in sloppy mode")
 DEFINE_NEG_IMPLICATION(es_staging, legacy_const)
 
 // Features that are still work in progress (behind individual flags).
-#define HARMONY_INPROGRESS(V)                                         \
-  V(harmony_modules, "harmony modules")                               \
-  V(harmony_proxies, "harmony proxies")                               \
-  V(harmony_unicode_regexps, "harmony unicode regexps")               \
-  V(harmony_tolength, "harmony ToLength")                             \
-  V(harmony_reflect, "harmony Reflect API")                           \
-  V(harmony_sloppy_function, "harmony sloppy function block scoping") \
-  V(harmony_destructuring, "harmony destructuring")                   \
-  V(harmony_default_parameters, "harmony default parameters")         \
-  V(harmony_sharedarraybuffer, "harmony sharedarraybuffer")           \
-  V(harmony_simd, "harmony simd")                                     \
+#define HARMONY_INPROGRESS(V)                                             \
+  V(harmony_modules, "harmony modules")                                   \
+  V(harmony_proxies, "harmony proxies")                                   \
+  V(harmony_unicode_regexps, "harmony unicode regexps")                   \
+  V(harmony_tolength, "harmony ToLength")                                 \
+  V(harmony_reflect, "harmony Reflect API")                               \
+  V(harmony_sloppy_function, "harmony sloppy function block scoping")     \
+  V(harmony_destructuring, "harmony destructuring")                       \
+  V(harmony_destructuring_assignment, "harmony destructuring assignment") \
+  V(harmony_default_parameters, "harmony default parameters")             \
+  V(harmony_sharedarraybuffer, "harmony sharedarraybuffer")               \
+  V(harmony_simd, "harmony simd")                                         \
   V(harmony_do_expressions, "harmony do-expressions")
 
 // Features that are complete (but still behind --harmony/es-staging flag).