R/compat-types-check.R

In stringr: Simple, Consistent Wrappers for Common String Operations

# nocov start --- r-lib/rlang compat-types-check
#
# Dependencies
# ============
#
# - compat-obj-type.R
#
# Changelog
# =========
#
# 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.

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

check_bool <- function(x,
                       ...,
                       allow_na = FALSE,
                       allow_null = FALSE,
                       arg = caller_arg(x),
                       call = caller_env()) {
  if (!missing(x)) {
    if (is_bool(x)) {
      return(invisible(NULL))
    }
    if (allow_null && is_null(x)) {
      return(invisible(NULL))
    }
    if (allow_na && identical(x, NA)) {
      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
  )
}

check_number_decimal <- function(x,
                                 ...,
                                 min = -Inf,
                                 max = Inf,
                                 allow_infinite = TRUE,
                                 allow_na = FALSE,
                                 allow_null = FALSE,
                                 arg = caller_arg(x),
                                 call = caller_env()) {
  .rlang_types_check_number(
    x,
    ...,
    min = min,
    max = max,
    allow_decimal = TRUE,
    allow_infinite = allow_infinite,
    allow_na = allow_na,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

check_number_whole <- function(x,
                               ...,
                               min = -Inf,
                               max = Inf,
                               allow_na = FALSE,
                               allow_null = FALSE,
                               arg = caller_arg(x),
                               call = caller_env()) {
  .rlang_types_check_number(
    x,
    ...,
    min = min,
    max = max,
    allow_decimal = FALSE,
    allow_infinite = FALSE,
    allow_na = allow_na,
    allow_null = allow_null,
    arg = arg,
    call = call
  )
}

.rlang_types_check_number <- function(x,
                                      ...,
                                      min = -Inf,
                                      max = Inf,
                                      allow_decimal = FALSE,
                                      allow_infinite = FALSE,
                                      allow_na = FALSE,
                                      allow_null = FALSE,
                                      arg = caller_arg(x),
                                      call = caller_env()) {
  if (allow_decimal) {
    what <- "a number"
  } else {
    what <- "a whole number"
  }

  .stop <- function(x, what, ...) stop_input_type(
    x,
    what,
    ...,
    allow_na = allow_na,
    allow_null = allow_null,
    arg = arg,
    call = call
  )

  if (!missing(x)) {
    is_number <- is_number(
      x,
      allow_decimal = allow_decimal,
      allow_infinite = allow_infinite
    )

    if (is_number) {
      if (min > -Inf && max < Inf) {
        what <- sprintf("a number between %s and %s", min, max)
      } else {
        what <- NULL
      }
      if (x < min) {
        what <- what %||% sprintf("a number larger than %s", min)
        .stop(x, what, ...)
      }
      if (x > max) {
        what <- what %||% sprintf("a number smaller than %s", max)
        .stop(x, what, ...)
      }
      return(invisible(NULL))
    }

    if (allow_null && is_null(x)) {
      return(invisible(NULL))
    }
    if (allow_na && (identical(x, NA) ||
                     identical(x, na_dbl) ||
                     identical(x, na_int))) {
      return(invisible(NULL))
    }
  }

  .stop(x, what, ...)
}

is_number <- function(x,
                      allow_decimal = FALSE,
                      allow_infinite = FALSE) {
  if (!typeof(x) %in% c("integer", "double")) {
    return(FALSE)
  }
  if (length(x) != 1) {
    return(FALSE)
  }
  if (is.na(x)) {
    return(FALSE)
  }
  if (!allow_decimal && !is_integerish(x)) {
    return(FALSE)
  }
  if (!allow_infinite && is.infinite(x)) {
    return(FALSE)
  }
  TRUE
}

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
  )
}

# nocov end