Function tryGetTypeAtPosition

test/fixtures/snapshot/typescript.js:77547–77563

(signature, pos)

            return tryGetTypeAtPosition(signature, pos) || anyType;
        }
        function tryGetTypeAtPosition(signature, pos) {
            var paramCount = signature.parameters.length - (signatureHasRestParameter(signature) ? 1 : 0);
            if (pos < paramCount) {
                return getTypeOfParameter(signature.parameters[pos]);
            }
            if (signatureHasRestParameter(signature)) {
                // We want to return the value undefined for an out of bounds parameter position,
                // so we need to check bounds here before calling getIndexedAccessType (which
                // otherwise would return the type 'undefined').
                var restType = getTypeOfSymbol(signature.parameters[paramCount]);
                var index = pos - paramCount;
                if (!isTupleType(restType) || restType.target.hasRestElement || index < restType.target.fixedLength) {
                    return getIndexedAccessType(restType, getNumberLiteralType(index));
                }
            }
            return undefined;
        }
        function getRestTypeAtPosition(source, pos) {
            var parameterCount = getParameterCount(source);
            var minArgumentCount = getMinArgumentCount(source);