Define and Enforce Contracts for Dataframes as Function Parameters

---

Documentation for package ‘interfacer’ version 0.2.3

• DESCRIPTION file.
• User guides, package vignettes and other documentation.
• Package NEWS.

Help Pages

as.list.iface	Cast an 'iface' to a plain list.
format.iface	Format an 'iface' specification for printing
iclip	Create an 'iface' specification from an example dataframe
iconvert	Convert a dataframe to a format compatible with an interface specification
idispatch	Dispatch to a named function based on the characteristics of a dataframe
idocument	Document an interface contract for inserting into 'roxygen2'
iface	Construct an interface specification
if_col_present	Execute a function or return a value if a column in present in a dataframe
igroup_process	Handle unexpected additional grouping structure
imapper	Specify mappings that can make dataframes compatible with an 'iface' specification
iproto	Generate a zero length dataframe conforming to an 'iface' specification
ireturn	Check a return parameter from a function
is.iface	Check if an object is an interface specification
is_col_present	Check for existence of a set of columns in a dataframe
itest	Test dataframe conformance to an interface specification.
ivalidate	Perform interface checks on dataframe inputs using enclosing function formal parameter definitions
knit_print.iface	Format an 'iface' specification for printing
print.iface	Format an 'iface' specification for printing
roxy_tag_parse.roxy_tag_iparam	Parser for @iparam tags
roxy_tag_rd.roxy_tag_iparam	Support for @iparam tags
switch_pipeline	Branch a 'dplyr' pipeline based on a set of conditions
type.anything	Coerce to an unspecified type
type.character	Coerce to a character.
type.complete	Coerce to a complete set of values.
type.date	Coerce to a Date.
type.default	Set a default value for a column
type.double	Coerce to a double.
type.enum	Define a conformance rule to match a factor with specific levels.
type.factor	Coerce to a factor.
type.finite	Check for non-finite values
type.group_unique	Coerce to a unique value.
type.integer	Coerce to integer
type.in_range	Define a conformance rule to confirm that a numeric is in a set range
type.logical	Coerce to a logical
type.not_missing	Check for missing values
type.numeric	Coerce to a numeric.
type.of_type	Check for a given class
type.positive_double	Coerce to a positive double.
type.positive_integer	Coerce to a positive integer.
type.proportion	Coerce to a number between 0 and 1
use_dataframe	Use a dataframe in a package including structure based documentation
use_iface	Generate interfacer code for a dataframe