R/import-standalone-types-check.R

In hadley/dplyr: A Grammar of Data Manipulation

# Standalone file: do not edit by hand
# Source: <https://github.com/r-lib/rlang/blob/main/R/standalone-types-check.R>
# ----------------------------------------------------------------------
#
# ---
# repo: r-lib/rlang
# file: standalone-types-check.R
# last-updated: 2023-02-15
# license: https://unlicense.org
# dependencies: standalone-obj-type.R
# ---
#
# ## Changelog
#
# 2023-02-15:
# - Added `check_logical()`.
#
# - `check_bool()`, `check_number_whole()`, and
#   `check_number_decimal()` are now implemented in C.
#
# - For efficiency, `check_number_whole()` and
#   `check_number_decimal()` now take a `NULL` default for `min` and
#   `max`. This makes it possible to bypass unnecessary type-checking
#   and comparisons in the default case of no bounds checks.
#
# 2022-10-07:
# - `check_number_whole()` and `_decimal()` no longer treat
#   non-numeric types such as factors or dates as numbers.  Numeric
#   types are detected with `is.numeric()`.
#
# 2022-10-04:
# - Added `check_name()` that forbids the empty string.
#   `check_string()` allows the empty string by default.
#
# 2022-09-28:
# - Removed `what` arguments.
# - Added `allow_na` and `allow_null` arguments.
# - Added `allow_decimal` and `allow_infinite` arguments.
# - Improved errors with absent arguments.
#
#
# 2022-09-16:
# - Unprefixed usage of rlang functions with `rlang::` to
#   avoid onLoad issues when called from rlang (#1482).
#
# 2022-08-11:
# - Added changelog.
#
# nocov start

# Scalars -----------------------------------------------------------------

.standalone_types_check_dot_call <- .Call

check_bool <- function(x,
                       ...,
                       allow_na = FALSE,
                       allow_null = FALSE,
                       arg = caller_arg(x),
                       call = caller_env()) {
  if (!missing(x) && .standalone_types_check_dot_call(ffi_standalone_is_bool_1.0.7, x, allow_na, allow_null)) {
    return(invisible(NULL))
  }

  stop_input_type(
    x,
    c("`TRUE`", "`FALSE`"),
    ...,
    allow_na = allow_na,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

check_string <- function(x,
                         ...,
                         allow_empty = TRUE,
                         allow_na = FALSE,
                         allow_null = FALSE,
                         arg = caller_arg(x),
                         call = caller_env()) {
  if (!missing(x)) {
    is_string <- .rlang_check_is_string(
      x,
      allow_empty = allow_empty,
      allow_na = allow_na,
      allow_null = allow_null
    )
    if (is_string) {
      return(invisible(NULL))
    }
  }

  stop_input_type(
    x,
    "a single string",
    ...,
    allow_na = allow_na,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

.rlang_check_is_string <- function(x,
                                   allow_empty,
                                   allow_na,
                                   allow_null) {
  if (is_string(x)) {
    if (allow_empty || !is_string(x, "")) {
      return(TRUE)
    }
  }

  if (allow_null && is_null(x)) {
    return(TRUE)
  }

  if (allow_na && (identical(x, NA) || identical(x, na_chr))) {
    return(TRUE)
  }

  FALSE
}

check_name <- function(x,
                       ...,
                       allow_null = FALSE,
                       arg = caller_arg(x),
                       call = caller_env()) {
  if (!missing(x)) {
    is_string <- .rlang_check_is_string(
      x,
      allow_empty = FALSE,
      allow_na = FALSE,
      allow_null = allow_null
    )
    if (is_string) {
      return(invisible(NULL))
    }
  }

  stop_input_type(
    x,
    "a valid name",
    ...,
    allow_na = FALSE,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

IS_NUMBER_true <- 0
IS_NUMBER_false <- 1
IS_NUMBER_oob <- 2

check_number_decimal <- function(x,
                                 ...,
                                 min = NULL,
                                 max = NULL,
                                 allow_infinite = TRUE,
                                 allow_na = FALSE,
                                 allow_null = FALSE,
                                 arg = caller_arg(x),
                                 call = caller_env()) {
  if (missing(x)) {
    exit_code <- IS_NUMBER_false
  } else if (0 == (exit_code <- .standalone_types_check_dot_call(
    ffi_standalone_check_number_1.0.7,
    x,
    allow_decimal = TRUE,
    min,
    max,
    allow_infinite,
    allow_na,
    allow_null
  ))) {
    return(invisible(NULL))
  }

  .stop_not_number(
    x,
    ...,
    exit_code = exit_code,
    allow_decimal = TRUE,
    min = min,
    max = max,
    allow_na = allow_na,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

check_number_whole <- function(x,
                               ...,
                               min = NULL,
                               max = NULL,
                               allow_na = FALSE,
                               allow_null = FALSE,
                               arg = caller_arg(x),
                               call = caller_env()) {
  if (missing(x)) {
    exit_code <- IS_NUMBER_false
  } else if (0 == (exit_code <- .standalone_types_check_dot_call(
    ffi_standalone_check_number_1.0.7,
    x,
    allow_decimal = FALSE,
    min,
    max,
    allow_infinite = FALSE,
    allow_na,
    allow_null
  ))) {
    return(invisible(NULL))
  }

  .stop_not_number(
    x,
    ...,
    exit_code = exit_code,
    allow_decimal = FALSE,
    min = min,
    max = max,
    allow_na = allow_na,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

.stop_not_number <- function(x,
                             ...,
                             exit_code,
                             allow_decimal,
                             min,
                             max,
                             allow_na,
                             allow_null,
                             arg,
                             call) {
  if (exit_code == IS_NUMBER_oob) {
    min <- min %||% -Inf
    max <- max %||% Inf

    if (min > -Inf && max < Inf) {
      what <- sprintf("a number between %s and %s", min, max)
    } else if (x < min) {
      what <- sprintf("a number larger than %s", min)
    } else if (x > max) {
      what <- sprintf("a number smaller than %s", max)
    } else {
      abort("Unexpected state in OOB check", .internal = TRUE)
    }
  } else if (allow_decimal) {
    what <- "a number"
  } else {
    what <- "a whole number"
  }

  stop_input_type(
    x,
    what,
    ...,
    allow_na = allow_na,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

check_symbol <- function(x,
                         ...,
                         allow_null = FALSE,
                         arg = caller_arg(x),
                         call = caller_env()) {
  if (!missing(x)) {
    if (is_symbol(x)) {
      return(invisible(NULL))
    }
    if (allow_null && is_null(x)) {
      return(invisible(NULL))
    }
  }

  stop_input_type(
    x,
    "a symbol",
    ...,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

check_arg <- function(x,
                      ...,
                      allow_null = FALSE,
                      arg = caller_arg(x),
                      call = caller_env()) {
  if (!missing(x)) {
    if (is_symbol(x)) {
      return(invisible(NULL))
    }
    if (allow_null && is_null(x)) {
      return(invisible(NULL))
    }
  }

  stop_input_type(
    x,
    "an argument name",
    ...,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

check_call <- function(x,
                       ...,
                       allow_null = FALSE,
                       arg = caller_arg(x),
                       call = caller_env()) {
  if (!missing(x)) {
    if (is_call(x)) {
      return(invisible(NULL))
    }
    if (allow_null && is_null(x)) {
      return(invisible(NULL))
    }
  }

  stop_input_type(
    x,
    "a defused call",
    ...,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

check_environment <- function(x,
                              ...,
                              allow_null = FALSE,
                              arg = caller_arg(x),
                              call = caller_env()) {
  if (!missing(x)) {
    if (is_environment(x)) {
      return(invisible(NULL))
    }
    if (allow_null && is_null(x)) {
      return(invisible(NULL))
    }
  }

  stop_input_type(
    x,
    "an environment",
    ...,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

check_function <- function(x,
                           ...,
                           allow_null = FALSE,
                           arg = caller_arg(x),
                           call = caller_env()) {
  if (!missing(x)) {
    if (is_function(x)) {
      return(invisible(NULL))
    }
    if (allow_null && is_null(x)) {
      return(invisible(NULL))
    }
  }

  stop_input_type(
    x,
    "a function",
    ...,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

check_closure <- function(x,
                          ...,
                          allow_null = FALSE,
                          arg = caller_arg(x),
                          call = caller_env()) {
  if (!missing(x)) {
    if (is_closure(x)) {
      return(invisible(NULL))
    }
    if (allow_null && is_null(x)) {
      return(invisible(NULL))
    }
  }

  stop_input_type(
    x,
    "an R function",
    ...,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

check_formula <- function(x,
                          ...,
                          allow_null = FALSE,
                          arg = caller_arg(x),
                          call = caller_env()) {
  if (!missing(x)) {
    if (is_formula(x)) {
      return(invisible(NULL))
    }
    if (allow_null && is_null(x)) {
      return(invisible(NULL))
    }
  }

  stop_input_type(
    x,
    "a formula",
    ...,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}


# Vectors -----------------------------------------------------------------

check_character <- function(x,
                            ...,
                            allow_null = FALSE,
                            arg = caller_arg(x),
                            call = caller_env()) {
  if (!missing(x)) {
    if (is_character(x)) {
      return(invisible(NULL))
    }
    if (allow_null && is_null(x)) {
      return(invisible(NULL))
    }
  }

  stop_input_type(
    x,
    "a character vector",
    ...,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

check_logical <- function(x,
                          ...,
                          allow_null = FALSE,
                          arg = caller_arg(x),
                          call = caller_env()) {
  if (!missing(x)) {
    if (is_logical(x)) {
      return(invisible(NULL))
    }
    if (allow_null && is_null(x)) {
      return(invisible(NULL))
    }
  }

  stop_input_type(
    x,
    "a logical vector",
    ...,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

# nocov end