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Code Issues 41 Packages Projects Releases Wiki Activity

allow interfaces to be cast to class instances

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This commit is contained in:
Dave Holoway
2020-06-06 13:57:23 +01:00
parent 13068cbcea
commit 09c15ef401
1 changed files with 7 additions and 1 deletions
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8
langserver/java/body-parser3.js
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@@ -1020,7 +1020,13 @@ function isTypeCastable(source_type, cast_type) {
return true; return true;
} }
if (source_type instanceof CEIType && cast_type instanceof CEIType) { if (source_type instanceof CEIType && cast_type instanceof CEIType) {
// for class casts, one type must be in the inheritence tree of the other if (source_type.typeKind === 'interface') {
// interfaces are castable to any non-final class type (derived types might implement the interface)
if (cast_type.typeKind === 'class' && !cast_type.modifiers.includes('final')) {
return true;
}
}
// for other class casts, one type must be in the inheritence tree of the other
if (getTypeInheritanceList(source_type).includes(cast_type)) { if (getTypeInheritanceList(source_type).includes(cast_type)) {
return true; return true;
} }