microsoft/TypeScript
1
0
Fork 0
mirror of https://github.com/microsoft/TypeScript.git synced 2026-05-19 10:41:56 -05:00
Code Issues Packages Projects Releases 212 Wiki Activity

Merge pull request #12808 from Microsoft/self-referencing-spread-recursive-loop

Browse Source 
Self-referencing spread recursive loop
This commit is contained in:
Nathan Shively-Sanders
2016-12-12 10:40:34 -08:00
committed by GitHub
parent 496a14a021 809706ba00
commit 65bb78d569
4 changed files with 33 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/compiler/checker.ts
View File

@@ -11320,13 +11320,7 @@ namespace ts {
}
function checkSpreadExpression(node: SpreadElement, contextualMapper?: TypeMapper): Type {
// It is usually not safe to call checkExpressionCached if we can be contextually typing.
// You can tell that we are contextually typing because of the contextualMapper parameter.
// While it is true that a spread element can have a contextual type, it does not do anything
// with this type. It is neither affected by it, nor does it propagate it to its operand.
// So the fact that contextualMapper is passed is not important, because the operand of a spread
// element is not contextually typed.
const arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
const arrayOrIterableType = checkExpression(node.expression, contextualMapper);
return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false);
}