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#' @rdname Truth
#' @export
is_false <- function(x, .xname = get_name_in_parent(x))
{
x <- coerce_to(x, "logical", .xname)
call_and_name(
function(x)
{
is_na_x <- is.na(x)
ok <- !(x | is_na_x) # same as !x & !is_na_x
set_cause(ok, ifelse(is_na_x, "missing", "true"))
},
x
)
}
#' @rdname Truth
#' @export
is_na <- function(x, coerce_to_logical = FALSE, .xname = get_name_in_parent(x))
{
call_and_name(
function(x)
{
if(coerce_to_logical)
{
x <- coerce_to(x, "logical", .xname)
}
ok <- is.na(x)
if(is.logical(x))
{
set_cause(ok, ifelse(x, "true", "false"))
} else
{
set_cause(ok, "not missing")
}
},
x
)
}
#' @rdname Truth
#' @export
is_not_na <- function(x, coerce_to_logical = FALSE, .xname = get_name_in_parent(x))
{
call_and_name(
function(x)
{
if(coerce_to_logical)
{
x <- coerce_to(x, "logical", .xname)
}
ok <- !is.na(x)
set_cause(ok, "missing")
},
x
)
}
#' @rdname Truth
#' @export
is_not_false <- function(x, .xname = get_name_in_parent(x))
{
x <- coerce_to(x, "logical", get_name_in_parent(x))
call_and_name(
function(x)
{
ok <- x | is.na(x)
set_cause(ok, "false")
},
x
)
}
#' @rdname Truth
#' @export
is_not_true <- function(x, .xname = get_name_in_parent(x))
{
x <- coerce_to(x, "logical", .xname)
call_and_name(
function(x)
{
ok <- !x | is.na(x)
set_cause(ok, "true")
},
x
)
}
#' @rdname Truth
#' @export
is_true <- function(x, .xname = get_name_in_parent(x))
{
x <- coerce_to(x, "logical", .xname)
call_and_name(
function(x)
{
is_na_x <- is.na(x)
ok <- x & !is_na_x
set_cause(ok, ifelse(is_na_x, "missing", "false"))
},
x
)
}
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