Merge pull request microsoft#26008 from ajafff/restbindingpattern

mhegazy · web-flow · commit 114cd80ed925 · 2018-07-31T11:31:22.000-07:00
allow BindingPattern in BindingRestElement
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -29280,10 +29280,6 @@ namespace ts {
                 }
                 checkGrammarForDisallowedTrailingComma(elements, Diagnostics.A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma);
 
-                if (node.name.kind === SyntaxKind.ArrayBindingPattern || node.name.kind === SyntaxKind.ObjectBindingPattern) {
-                    return grammarErrorOnNode(node.name, Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                }
-
                 if (node.propertyName) {
                     return grammarErrorOnNode(node.name, Diagnostics.A_rest_element_cannot_have_a_property_name);
                 }
diff --git a/tests/baselines/reference/restElementWithBindingPattern.errors.txt b/tests/baselines/reference/restElementWithBindingPattern.errors.txt
diff --git a/tests/baselines/reference/restElementWithBindingPattern2.errors.txt b/tests/baselines/reference/restElementWithBindingPattern2.errors.txt
@@ -1,10 +1,7 @@
-tests/cases/conformance/es6/destructuring/restElementWithBindingPattern2.ts(1,9): error TS2501: A rest element cannot contain a binding pattern.
 tests/cases/conformance/es6/destructuring/restElementWithBindingPattern2.ts(1,16): error TS2459: Type 'number[]' has no property 'b' and no string index signature.
 
 
-==== tests/cases/conformance/es6/destructuring/restElementWithBindingPattern2.ts (2 errors) ====
+==== tests/cases/conformance/es6/destructuring/restElementWithBindingPattern2.ts (1 errors) ====
     var [...{0: a, b }] = [0, 1];
-            ~~~~~~~~~~
-!!! error TS2501: A rest element cannot contain a binding pattern.
                    ~
 !!! error TS2459: Type 'number[]' has no property 'b' and no string index signature.

Original file line number	Diff line number	Diff line change
`@@ -29280,10 +29280,6 @@ namespace ts {`
`29280`	`29280`	`}`
`29281`	`29281`	`checkGrammarForDisallowedTrailingComma(elements, Diagnostics.A_rest_parameter_or_binding_pattern_may_not_have_a_trailing_comma);`
`29282`	`29282`
`29283`		`- if (node.name.kind === SyntaxKind.ArrayBindingPattern \|\| node.name.kind === SyntaxKind.ObjectBindingPattern) {`
`29284`		`- return grammarErrorOnNode(node.name, Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);`
`29285`		`- }`
`29286`		`-`
`29287`	`29283`	`if (node.propertyName) {`
`29288`	`29284`	`return grammarErrorOnNode(node.name, Diagnostics.A_rest_element_cannot_have_a_property_name);`
`29289`	`29285`	`}`