Validate without throwing

For input that is expected to be wrong sometimes – a web form, an upload, a config file – where you want to collect the problems rather than abort.

Usage

try_parse(t, x)

Arguments

t

A type, or anything as_type() accepts.

x

The value to validate.

Value

A list with ok, value and problems (a list of {path, expected, got, hint} records).

Examples

try_parse(int[1], 1)
#> $ok
#> [1] TRUE
#> 
#> $value
#> [1] 1
#> 
#> $problems
#> list()
#> 
r <- try_parse(int[1], "x")
r$ok
#> [1] FALSE
r$problems[[1]]$hint
#> [1] "strings are never parsed implicitly"