Allow -Infinity as an enum property name

fabiancook · fabiancook · commit 98ac4e4c51a0 · 2016-09-08T09:21:34.000+12:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -10034,7 +10034,7 @@ namespace ts {
         }
 
         function isInfinityOrNaNString(name: string) : boolean {
-            return name === 'Infinity' || name === 'NaN';
+            return name === 'Infinity' || name === '-Infinity' || name === 'NaN';
         }
 
         function isNumericLiteralName(name: string) {
diff --git a/tests/baselines/reference/enumWithNegativeInfinityProperty.js b/tests/baselines/reference/enumWithNegativeInfinityProperty.js
@@ -0,0 +1,11 @@
+//// [enumWithNegativeInfinityProperty.ts]
+enum A {
+    "-Infinity" = 1
+}
+
+
+//// [enumWithNegativeInfinityProperty.js]
+var A;
+(function (A) {
+    A[A["-Infinity"] = 1] = "-Infinity";
+})(A || (A = {}));
diff --git a/tests/baselines/reference/enumWithNegativeInfinityProperty.symbols b/tests/baselines/reference/enumWithNegativeInfinityProperty.symbols
@@ -0,0 +1,7 @@
+=== tests/cases/compiler/enumWithNegativeInfinityProperty.ts ===
+enum A {
+>A : Symbol(A, Decl(enumWithNegativeInfinityProperty.ts, 0, 0))
+
+    "-Infinity" = 1
+}
+
diff --git a/tests/baselines/reference/enumWithNegativeInfinityProperty.types b/tests/baselines/reference/enumWithNegativeInfinityProperty.types
@@ -0,0 +1,8 @@
+=== tests/cases/compiler/enumWithNegativeInfinityProperty.ts ===
+enum A {
+>A : A
+
+    "-Infinity" = 1
+>1 : number
+}
+
diff --git a/tests/cases/compiler/enumWithNegativeInfinityProperty.ts b/tests/cases/compiler/enumWithNegativeInfinityProperty.ts
@@ -0,0 +1,3 @@
+enum A {
+    "-Infinity" = 1
+}

Original file line number	Diff line number	Diff line change
`@@ -10034,7 +10034,7 @@ namespace ts {`
`10034`	`10034`	`}`
`10035`	`10035`
`10036`	`10036`	`function isInfinityOrNaNString(name: string) : boolean {`
`10037`		`- return name === 'Infinity' \|\| name === 'NaN';`
	`10037`	`+ return name === 'Infinity' \|\| name === '-Infinity' \|\| name === 'NaN';`
`10038`	`10038`	`}`
`10039`	`10039`
`10040`	`10040`	`function isNumericLiteralName(name: string) {`
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+enum A {`
	`2`	`+ "-Infinity" = 1`
	`3`	`+}`