microsoft/TypeScript
1
0
Fork 0
mirror of https://github.com/microsoft/TypeScript.git synced 2026-05-15 21:36:50 -05:00
Code Issues Packages Projects Releases 212 Wiki Activity

Display the name 'nothing' for the empty union type

Browse Source
This commit is contained in:
Anders Hejlsberg
2016-04-27 13:54:40 -07:00
parent b99a2e0837
commit 8cd32535ac
1 changed files with 9 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/compiler/checker.ts
View File

@@ -2014,7 +2014,12 @@ namespace ts {
writeUnionOrIntersectionType(<UnionOrIntersectionType>type, flags);
}
else if (type.flags & TypeFlags.Anonymous) {
writeAnonymousType(<ObjectType>type, flags);
if (type === emptyUnionType) {
writer.writeKeyword("nothing");
}
else {
writeAnonymousType(<ObjectType>type, flags);
}
}
else if (type.flags & TypeFlags.StringLiteral) {
writer.writeStringLiteral(`"${escapeString((<StringLiteralType>type).text)}"`);
@@ -4247,7 +4252,9 @@ namespace ts {
propTypes.push(getTypeOfSymbol(prop));
}
}
return getUnionType(propTypes);
if (propTypes.length) {
return getUnionType(propTypes);
}
}
return undefined;
}