# Functions for Base Types and Core R and 'Tidyverse' Features

## Documentation for package ‘rlang’ version 1.2.0

- DESCRIPTION file.
- Package NEWS.

## Help Pages

A B C D E F G H I L M N O P Q R S T U V W Z misc

## -- A --

abort | Signal an error, warning, or message
add_backtrace | Display backtrace on error
args_error_context | Documentation anchor for error arguments
arg_match | Match an argument to a character vector
arg_match0 | Match an argument to a character vector
as_box | Convert object to a box
as_box_if | Convert object to a box
as_bytes | Human readable memory sizes
as_data_mask | Create a data mask
as_data_pronoun | Create a data mask
as_environment | Coerce to an environment
as_function | Convert to function
as_label | Create a default name for an R object
as_name | Extract names from symbols
as_quosure | Create a quosure from components
as_quosures | Create a list of quosures
as_string | Cast symbol to string

## -- B --

bang-bang | Injection operator !!
bare-type-predicates | Bare type predicates
box | Box a value
bytes | Create vectors
bytes-class | Human readable memory sizes

## -- C --

call2 | Create a call
caller_arg | Find the caller argument for error messages
caller_call | Get properties of the current or caller frame
caller_env | Get properties of the current or caller frame
caller_fn | Get properties of the current or caller frame
call_args | Extract arguments from a call
call_args_names | Extract arguments from a call
call_inspect | Inspect a call
call_match | Match supplied arguments to function definition
call_modify | Modify the arguments of a call
call_name | Extract function name or namespace of a call
call_ns | Extract function name or namespace of a call
catch_cnd | Catch a condition
check_bool | Check argument type (scalar)
check_data_frame | Check argument type (data frame)
check_dots_empty | Check that dots are empty
check_dots_unnamed | Check that all dots are unnamed
check_dots_used | Check that all dots have been used
check_exclusive | Check that arguments are mutually exclusive
check_installed | Are packages installed in any of the libraries?
check_number_decimal | Check argument type (numbers)
check_number_whole | Check argument type (numbers)
check_required | Check that argument is supplied
check_string | Check argument type (scalar)
check_type_number | Check argument type (numbers)
check_type_scalar | Check argument type (scalar)
chr | Create vectors
cnd_body | Build an error message from parts
cnd_footer | Build an error message from parts
cnd_header | Build an error message from parts
cnd_inherits | Does a condition or its ancestors inherit from a class?
cnd_message | Build an error message from parts
cnd_signal | Signal a condition object
cpl | Create vectors
curly-curly | Embrace operator {{
current_call | Get properties of the current or caller frame
current_env | Get properties of the current or caller frame
current_fn | Get properties of the current or caller frame

## -- D --

data_sym | Create a symbol or list of symbols
data_syms | Create a symbol or list of symbols
dbl | Create vectors
doc_dots_dynamic | Dynamic dots features
done | Box a final value for early termination
dot-data | '.data' and '.env' pronouns
dots_list | Collect dynamic dots in a list
dyn-dots | Dynamic dots features

## -- E --

embrace-operator | Embrace operator {{
empty_env | Get the empty environment
englue | Defuse function arguments with glue
enquo | Defuse function arguments
enquos | Defuse function arguments
env | Create a new environment
env_bind | Bind symbols to objects in an environment
env_bind_active | Bind symbols to objects in an environment
env_bind_lazy | Bind symbols to objects in an environment
env_browse | Browse environments
env_cache | Cache a value in an environment
env_clone | Clone or coalesce an environment
env_coalesce | Clone or coalesce an environment
env_depth | Depth of an environment chain
env_get | Get an object in an environment
env_get_list | Get an object in an environment
env_has | Does an environment have or see bindings?
env_inherits | Does environment inherit from another environment?
env_is_browsed | Browse environments
env_is_user_facing | Is frame environment user facing?
env_label | Label of an environment
env_length | Names and numbers of symbols bound in an environment
env_name | Label of an environment
env_names | Names and numbers of symbols bound in an environment
env_parent | Get parent environments
env_parents | Get parent environments
env_poke | Poke an object in an environment
env_poke_parent | Get or set the environment of an object
env_print | Pretty-print an environment
env_tail | Get parent environments
env_unbind | Remove bindings from an environment
eval_bare | Evaluate an expression in an environment
eval_tidy | Evaluate an expression with quosures and pronoun support
exec | Execute a function
expr | Defuse an R expression
exprs_auto_name | Ensure that all elements of a list of expressions are named
expr_deparse | Print an expression
expr_print | Print an expression

## -- F --

faq-options | Global options for rlang
fn_body | Get or set function body
fn_body<- | Get or set function body
fn_env | Return the closure environment of a function
fn_env<- | Return the closure environment of a function
fn_fmls | Extract arguments from a function
fn_fmls<- | Extract arguments from a function
fn_fmls_names | Extract arguments from a function
fn_fmls_names<- | Extract arguments from a function
fn_fmls_syms | Extract arguments from a function
format_error_bullets | Format bullets for error messages
frame_call | Get properties of the current or caller frame
frame_fn | Get properties of the current or caller frame
f_env | Get or set formula components
f_env<- | Get or set formula components
f_label | Turn RHS of formula into a string or label
f_lhs | Get or set formula components
f_lhs<- | Get or set formula components
f_name | Turn RHS of formula into a string or label
f_rhs | Get or set formula components
f_rhs<- | Get or set formula components
f_text | Turn RHS of formula into a string or label

## -- G --

get_env | Get or set the environment of an object
global_entrace | Entrace unexpected errors
global_handle | Register default global handlers
global_prompt_install | Prompt user to install missing packages
glue-operators | Name injection with '"{"' and '"{{"'

## -- H --

hash | Hashing
hash_file | Hashing
has_name | Does an object have an element with this name?
have_name | Is object named?

## -- I --

inform | Signal an error, warning, or message
inherits_all | Does an object inherit from a set of classes?
inherits_any | Does an object inherit from a set of classes?
inherits_only | Does an object inherit from a set of classes?
inject | Inject objects in an R expression
injection-operator | Injection operator !!
int | Create vectors
is_atomic | Type predicates
is_bare_atomic | Bare type predicates
is_bare_bytes | Bare type predicates
is_bare_character | Bare type predicates
is_bare_complex | Bare type predicates
is_bare_double | Bare type predicates
is_bare_environment | Is object an environment?
is_bare_formula | Is object a formula?
is_bare_integer | Bare type predicates
is_bare_integerish | Is a vector integer-like?
is_bare_list | Bare type predicates
is_bare_logical | Bare type predicates
is_bare_numeric | Bare type predicates
is_bare_raw | Bare type predicates
is_bare_string | Bare type predicates
is_bare_vector | Bare type predicates
is_bool | Scalar type predicates
is_box | Box a value
is_bytes | Type predicates
is_call | Is object a call?
is_call_simple | Extract function name or namespace of a call
is_character | Type predicates
is_closure | Is object a function?
is_complex | Type predicates
is_done_box | Box a final value for early termination
is_double | Type predicates
is_empty | Is object an empty vector or NULL?
is_environment | Is object an environment?
is_expression | Is an object an expression?
is_false | Is object identical to TRUE or FALSE?
is_formula | Is object a formula?
is_function | Is object a function?
is_installed | Are packages installed in any of the libraries?
is_integer | Type predicates
is_integerish | Is a vector integer-like?
is_interactive | Is R running interactively?
is_lambda | Convert to function
is_list | Type predicates
is_logical | Type predicates
is_missing | Generate or handle a missing argument
is_named | Is object named?
is_named2 | Is object named?
is_namespace | Is an object a namespace environment?
is_null | Type predicates
is_primitive | Is object a function?
is_primitive_eager | Is object a function?
is_primitive_lazy | Is object a function?
is_quosure | Create a quosure from components
is_quosures | Create a list of quosures
is_raw | Type predicates
is_scalar_atomic | Scalar type predicates
is_scalar_bytes | Scalar type predicates
is_scalar_character | Scalar type predicates
is_scalar_complex | Scalar type predicates
is_scalar_double | Scalar type predicates
is_scalar_integer | Scalar type predicates
is_scalar_integerish | Is a vector integer-like?
is_scalar_list | Scalar type predicates
is_scalar_logical | Scalar type predicates
is_scalar_raw | Scalar type predicates
is_scalar_vector | Scalar type predicates
is_spliced | Splice values at dots collection time
is_spliced_bare | Splice values at dots collection time
is_string | Scalar type predicates
is_symbol | Is object a symbol?
is_symbolic | Is an object an expression?
is_syntactic_literal | Is an object an expression?
is_true | Is object identical to TRUE or FALSE?
is_vector | Type predicates
is_weakref | Is object a weak reference?
is_zap | Create zap objects

## -- L --

last_error | Last 'abort()' error
last_messages | Display last messages and warnings
last_trace | Last 'abort()' error
last_warnings | Display last messages and warnings
lgl | Create vectors
list2 | Collect dynamic dots in a list
ll | Collect dynamic dots in a list
local_bindings | Temporarily change bindings of an environment
local_error_call | Set local error call in an execution environment
local_interactive | Is R running interactively?
local_options | Change global options

## -- M --

maybe_missing | Generate or handle a missing argument
missing_arg | Generate or handle a missing argument

## -- N --

names2 | Get names of a vector
names2<- | Get names of a vector
new_box | Box a value
new_data_mask | Create a data mask
new_environment | Create a new environment
new_formula | Create a formula
new_function | Create a function
new_quosure | Create a quosure from components
new_quosures | Create a list of quosures
new_weakref | Create a weak reference

## -- O --

on_load | Run expressions on load
on_package_load | Run expressions on load
op-get-attr | Infix attribute accessor and setter
op-null-continuation | Default value for non-'NULL'
op-null-default | Default value for 'NULL'

## -- P --

pairlist2 | Collect dynamic dots in a pairlist
parse_bytes | Human readable memory sizes
parse_expr | Parse R code
parse_exprs | Parse R code
parse_quo | Parse R code
parse_quos | Parse R code
peek_option | Change global options
peek_options | Change global options
push_options | Change global options

## -- Q --

qq_show | Show injected expression
quosure | Quosure getters, setters and predicates
quosure-tools | Quosure getters, setters and predicates
quos_auto_name | Ensure that all elements of a list of expressions are named
quo_get_env | Quosure getters, setters and predicates
quo_get_expr | Quosure getters, setters and predicates
quo_is_call | Quosure getters, setters and predicates
quo_is_missing | Quosure getters, setters and predicates
quo_is_null | Quosure getters, setters and predicates
quo_is_symbol | Quosure getters, setters and predicates
quo_is_symbolic | Quosure getters, setters and predicates
quo_set_env | Quosure getters, setters and predicates
quo_set_expr | Quosure getters, setters and predicates
quo_squash | Squash a quosure

## -- R --

rep_along | Create vectors matching the length of a given vector
rep_named | Create vectors matching the length of a given vector
reset_message_verbosity | Signal an error, warning, or message
reset_warning_verbosity | Signal an error, warning, or message
rlang_backtrace_on_error | Display backtrace on error
rlang_backtrace_on_error_report | Display backtrace on error
rlang_backtrace_on_warning_report | Display backtrace on error
rlang_error | Errors of class 'rlang_error'
run_on_load | Run expressions on load

## -- S --

scalar-type-predicates | Scalar type predicates
seq2 | Increasing sequence of integers in an interval
seq2_along | Increasing sequence of integers in an interval
set_env | Get or set the environment of an object
set_names | Set names of a vector
signal | Signal an error, warning, or message
splice | Splice values at dots collection time
splice-operator | Splice operator !!!
stack | Get properties of the current or caller frame
stop_input_type | Throw a type mismatch error
sym | Create a symbol or list of symbols
syms | Create a symbol or list of symbols

## -- T --

tidy-dots | Dynamic dots features
tidyeval-data | '.data' and '.env' pronouns
trace_back | Capture a backtrace
trace_length | Capture a backtrace
try_fetch | Try an expression with condition handlers
type-predicates | Type predicates

## -- U --

unbox | Box a value

## -- V --

vector-construction | Create vectors

## -- W --

warn | Signal an error, warning, or message
with_bindings | Temporarily change bindings of an environment
with_interactive | Is R running interactively?
with_options | Change global options
wref_key | Get key/value from a weak reference object
wref_value | Get key/value from a weak reference object

## -- Z --

zap | Create zap objects
zap_srcref | Zap source references

## -- misc --

!! | Injection operator !!
!!! | Splice operator !!!
%&&% | Default value for non-'NULL'
%<~% | Bind symbols to objects in an environment
%@% | Infix attribute accessor and setter
%@%<- | Infix attribute accessor and setter
%||% | Default value for 'NULL'
.data | '.data' and '.env' pronouns
.env | '.data' and '.env' pronouns
:= | Dynamic dots features