vec_default_ptype2: Default cast and ptype2 methods
In vctrs: Vector Helpers

vec_default_cast

R Documentation

Default cast and ptype2 methods

Description

These functions are automatically called when no vec_ptype2() or vec_cast() method is implemented for a pair of types.

They apply special handling if one of the inputs is of type AsIs or sfc.
They attempt a number of fallbacks in cases where it would be too inconvenient to be strict:
- If the class and attributes are the same they are considered compatible. vec_default_cast() returns x in this case.
- In case of incompatible data frame classes, they fall back to data.frame. If an incompatible subclass of tibble is involved, they fall back to tbl_df.
Otherwise, an error is thrown with stop_incompatible_type() or stop_incompatible_cast().

Usage

vec_default_cast(x, to, ..., x_arg = "", to_arg = "", call = caller_env())

vec_default_ptype2(x, y, ..., x_arg = "", y_arg = "", call = caller_env())

Arguments

`x`	Vectors to cast.
`to`	Type to cast to. If `NULL`, `x` will be returned as is.
`...`	For `vec_cast_common()`, vectors to cast. For `vec_cast()`, `vec_cast_default()`, and `vec_restore()`, these dots are only for future extensions and should be empty.
`x_arg`	Argument name for `x`, used in error messages to inform the user about the locations of incompatible types (see `stop_incompatible_type()`).
`to_arg`	Argument name `to` used in error messages to inform the user about the locations of incompatible types (see `stop_incompatible_type()`).
`call`	The execution environment of a currently running function, e.g. `caller_env()`. The function will be mentioned in error messages as the source of the error. See the `call` argument of `abort()` for more information.