Signature#declaration can be undefined (microsoft#22515)

ajafff · Andy · commit 7715b5139ba0 · 2018-03-14T13:24:41.000-07:00
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
@@ -3875,7 +3875,7 @@ namespace ts {
     }
 
     export interface Signature {
-        declaration: SignatureDeclaration;  // Originating declaration
+        declaration?: SignatureDeclaration; // Originating declaration
         typeParameters?: TypeParameter[];   // Type parameters (undefined if non-generic)
         parameters: Symbol[];               // Parameters
         /* @internal */
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -2223,7 +2223,7 @@ declare namespace ts {
         Construct = 1,
     }
     interface Signature {
-        declaration: SignatureDeclaration;
+        declaration?: SignatureDeclaration;
         typeParameters?: TypeParameter[];
         parameters: Symbol[];
     }
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
@@ -2223,7 +2223,7 @@ declare namespace ts {
         Construct = 1,
     }
     interface Signature {
-        declaration: SignatureDeclaration;
+        declaration?: SignatureDeclaration;
         typeParameters?: TypeParameter[];
         parameters: Symbol[];
     }

Original file line number	Diff line number	Diff line change
`@@ -3875,7 +3875,7 @@ namespace ts {`
`3875`	`3875`	`}`
`3876`	`3876`
`3877`	`3877`	`export interface Signature {`
`3878`		`- declaration: SignatureDeclaration; // Originating declaration`
	`3878`	`+ declaration?: SignatureDeclaration; // Originating declaration`
`3879`	`3879`	`typeParameters?: TypeParameter[]; // Type parameters (undefined if non-generic)`
`3880`	`3880`	`parameters: Symbol[]; // Parameters`
`3881`	`3881`	`/* @internal */`
Original file line number	Diff line number	Diff line change
`@@ -2223,7 +2223,7 @@ declare namespace ts {`
`2223`	`2223`	`Construct = 1,`
`2224`	`2224`	`}`
`2225`	`2225`	`interface Signature {`
`2226`		`- declaration: SignatureDeclaration;`
	`2226`	`+ declaration?: SignatureDeclaration;`
`2227`	`2227`	`typeParameters?: TypeParameter[];`
`2228`	`2228`	`parameters: Symbol[];`
`2229`	`2229`	`}`