Function isValidIndexKeyType

test/fixtures/snapshot/typescript.js:60059–60062

(type)

            return ts.emptyArray;
        }
        function isValidIndexKeyType(type) {
            return !!(type.flags & (4 /* TypeFlags.String */ | 8 /* TypeFlags.Number */ | 4096 /* TypeFlags.ESSymbol */)) || isPatternLiteralType(type) ||
                !!(type.flags & 2097152 /* TypeFlags.Intersection */) && !isGenericType(type) && ts.some(type.types, isValidIndexKeyType);
        }
        function getConstraintDeclaration(type) {
            return ts.mapDefined(ts.filter(type.symbol && type.symbol.declarations, ts.isTypeParameterDeclaration), ts.getEffectiveConstraintOfTypeParameter)[0];
        }