Find the common type for a pair of vectors
vec_ptype2() defines the coercion hierarchy for a set of related
vector types. Along with vec_cast(), this generic forms the
foundation of type coercions in vctrs.
vec_ptype2() is relevant when you are implementing vctrs methods
for your class, but it should not usually be called directly. If
you need to find the common type of a set of inputs, call
vec_ptype_common() instead. This function supports multiple
inputs and finalises the common type.
## S3 method for class 'logical' vec_ptype2(x, y, ..., x_arg = "", y_arg = "") ## S3 method for class 'integer' vec_ptype2(x, y, ..., x_arg = "", y_arg = "") ## S3 method for class 'double' vec_ptype2(x, y, ..., x_arg = "", y_arg = "") ## S3 method for class 'complex' vec_ptype2(x, y, ..., x_arg = "", y_arg = "") ## S3 method for class 'character' vec_ptype2(x, y, ..., x_arg = "", y_arg = "") ## S3 method for class 'raw' vec_ptype2(x, y, ..., x_arg = "", y_arg = "") ## S3 method for class 'list' vec_ptype2(x, y, ..., x_arg = "", y_arg = "") vec_ptype2(x, y, ..., x_arg = "", y_arg = "")
x, y |
Vector types. |
... |
These dots are for future extensions and must be empty. |
x_arg, y_arg |
Argument names for |
For an overview of how these generics work and their roles in vctrs,
see ?theory-faq-coercion.
For an example of implementing coercion methods for simple vectors,
see ?howto-faq-coercion.
For an example of implementing coercion methods for data frame
subclasses, see
?howto-faq-coercion-data-frame.
For a tutorial about implementing vctrs classes from scratch, see
vignette("s3-vector").
vec_ptype() is applied to x and y
stop_incompatible_type() when you determine from the
attributes that an input can't be cast to the target type.
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