Implicit integer linter

Check that integers are explicitly typed using the form 1L instead of 1.

Usage

implicit_integer_linter(allow_colon = FALSE)

Arguments

allow_colon

Logical, default FALSE. If TRUE, expressions involving : won't throw a lint regardless of whether the inputs are implicitly integers.

See also

linters for a complete list of linters available in lintr.

Tags

best_practices, configurable, consistency, style

Examples

# will produce lints
lint(
  text = "x <- 1",
  linters = implicit_integer_linter()
)
#> <text>:1:7: style: [implicit_integer_linter] Use 1L or 1.0 to avoid implicit integers.
#> x <- 1
#>      ~^

lint(
  text = "x[2]",
  linters = implicit_integer_linter()
)
#> <text>:1:4: style: [implicit_integer_linter] Use 2L or 2.0 to avoid implicit integers.
#> x[2]
#>   ~^

lint(
  text = "1:10",
  linters = implicit_integer_linter()
)
#> <text>:1:2: style: [implicit_integer_linter] Use 1L or 1.0 to avoid implicit integers.
#> 1:10
#> ~^
#> <text>:1:5: style: [implicit_integer_linter] Use 10L or 10.0 to avoid implicit integers.
#> 1:10
#>   ~~^

# okay
lint(
  text = "x <- 1.0",
  linters = implicit_integer_linter()
)
#> ℹ No lints found.

lint(
  text = "x <- 1L",
  linters = implicit_integer_linter()
)
#> ℹ No lints found.

lint(
  text = "x[2L]",
  linters = implicit_integer_linter()
)
#> ℹ No lints found.

lint(
  text = "1:10",
  linters = implicit_integer_linter(allow_colon = TRUE)
)
#> ℹ No lints found.