rlang: Tools for Language Objects and Evaluation

> library(rlang)


Attaching package: 'rlang'

The following objects are masked from 'package:purrr':

    %@%, %||%, as_function, flatten, flatten_chr, flatten_dbl,
    flatten_int, flatten_lgl, invoke, list_along, modify, prepend,
    rep_along, set_names, splice

The following object is masked from 'package:tibble':

    has_name

The following objects are masked from 'package:testthat':

    is_false, is_null, is_true

The following objects are masked from 'package:devtools':

    ns_env, pkg_env

The following object is masked from 'package:git2r':

    is_empty

The following object is masked from 'package:magrittr':

    set_names

バージョン: 0.1.1

関数名` 概略
abort Signal an error, warning, or message
are_na Test for missing values
arg_match Match an argument to a character vector
as_bytes Coerce to a raw vector
as_env Coerce to an environment
as_function Convert to function or closure
as_overscope Create a dynamic scope for tidy evaluation
as_pairlist Coerce to pairlist
as_quosure Coerce object to quosure
as_utf8_character Coerce to a character vector and attempt encoding conversion
bare-type-predicates Bare type predicates
call_inspect Inspect a call
caller_env Get the environment of the caller frame
cnd_signal Signal a condition
dictionary Create a dictionary
dots_definitions Tidy quotation of multiple expressions and dots
dots_list Extract dots with splicing semantics
dots_n How many arguments are currently forwarded in dots?
dots_values Evaluate dots with preliminary splicing
duplicate Duplicate an R object
empty_env Get the empty environment
env Create a new environment
env_bind Bind symbols to objects in an environment
env_bury Overscope bindings by defining symbols deeper in a scope
env_clone Clone an environment
env_depth Depth of an environment chain
env_get Get an object from an environment
env_has Does an environment have or see bindings?
env_inherits Does environment inherit from another environment?
env_names Names of symbols bound in an environment
env_parent Get parent environments
env_unbind Remove bindings from an environment
eval_bare Evaluate an expression in an environment
eval_tidy Evaluate an expression tidily
eval_tidy_ Tidy evaluation in a custom environment
exiting Create an exiting or in place handler
expr Raw quotation of an expression
expr_interp Process unquote operators in a captured expression
expr_label Turn an expression to a label
exprs_auto_name Ensure that list of expressions are all named
f_rhs Get or set formula components
f_text Turn RHS of formula into a string or label
flatten Flatten or squash a list of lists into a simpler vector
fn_env Return the closure environment of a function
fn_fmls Extract arguments from a function
frame_position Find the position or distance of a frame on the evaluation stack
friendly_type Format a type for error messages
get_env Get or set the environment of an object
has_length How long is an object?
has_name Does an object have an element with this name?
invoke Invoke a function with a list of arguments
is_callable Is an object callable?
is_condition Is object a condition?
is_copyable Is an object copyable?
is_empty Is object an empty vector or NULL?
is_env Is object an environment?
is_expr Is an object an expression?
is_formula Is object a formula?
is_frame Is object a frame?
is_function Is object a function?
is_installed Is a package installed in the library?
is_integerish Is a vector integer-like?
is_lang Is object a call?
is_named Is object named?
is_pairlist Is object a node or pairlist?
is_quosure Is an object a quosure or quosure-like?
is_stack Is object a stack?
is_symbol Is object a symbol?
is_true Is object identical to TRUE or FALSE?
lang Create a call
lang_args Extract arguments from a call
lang_fn Extract function from a call
lang_head Return the head or tail of a call object
lang_modify Modify the arguments of a call
lang_name Extract function name of a call
lang_standardise Standardise a call
missing Missing values
missing_arg Generate or handle a missing argument
modify Modify a vector
mut_utf8_ locale Set the locale's codeset for testing
names2 Get names of a vector
new_cnd Create a condition object
new_formula Create a formula
new_function Create a function
ns_env Get the namespace of a package
op-definition Definition operator
op-get-attr Infix attribute accessor
op-na-default Replace missing values
op-null-default Default value for 'NULL'
pairlist Helpers for pairlist and language nodes
parse_expr Parse R code
prepend Prepend a vector
prim_name Name of a primitive function
quasiquotation Quasiquotation of an expression
quo-predicates Is a quosure quoting a symbolic, missing or NULL object?
quo_expr Splice a quosure and format it into string or label
quosure Create quosures
restarting Create a restarting handler
return_from Jump to or from a frame
rst_abort Jump to the abort restart
rst_list Restarts utilities
rst_muffle Jump to a muffling restart
scalar-type-predicates Scalar type predicates
scoped_env Scoped environments
seq2 Increasing sequence of integers in an interval
set_attrs Add attributes to an object
set_chr_encoding Set encoding of a string or character vector
set_expr Set and get an expression
set_names Set names of a vector
splice Splice a list within a vector
stack Call stack information
stack_trim Trim top call layers from the evaluation stack
string Create a string
switch_lang Dispatch on call type
switch_type Dispatch on base types
sym Create a symbol or list of symbols
tidyeval-data Data pronoun for tidy evaluation
type-predicates Type predicates
type_of Base type of an object
vector-along Create vectors matching the length of a given vector
vector-coercion Coerce an object to a base type
vector-construction Create vectors
vector-len Create vectors matching a given length
with_env Evaluate an expression within a given environment
with_handlers Establish handlers on the stack
with_restarts Establish a restart point on the stack