romainfrancois commented on a change in pull request #11751:
URL: https://github.com/apache/arrow/pull/11751#discussion_r754522878
##########
File path: r/R/type.R
##########
@@ -40,7 +40,8 @@ DataType <- R6Class("DataType",
fields = function() {
DataType__fields(self)
},
- export_to_c = function(ptr) ExportType(self, ptr)
+ export_to_c = function(ptr) ExportType(self, ptr),
+ code = function() call2("unknown_type", self$ToString())
Review comment:
The bit we had previously with an artificial call to `unknown_type()`
allowed to have almost all the schema, with just these as placeholders:
``` r
library(arrow, warn.conflicts = FALSE)
#> See arrow_info() for available features
try_ <- function(code) tryCatch(code, error = function(cnd) print(cnd,
backtrace = FALSE))
try_(
schema(x = int32(), y = struct(a =
arrow:::DayTimeInterval__initialize()))$code()
)
#> schema(x = int32(), y = struct(a = unknown_type("day_time_interval")))
```
<sup>Created on 2021-11-22 by the [reprex
package](https://reprex.tidyverse.org) (v2.0.1.9000)</sup>
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