Require usage of a leading zero in all fractional numerics

While .1 and 0.1 mean the same thing, the latter is easier to read due to the small size of the '.' glyph.

Usage

numeric_leading_zero_linter()

See also

linters for a complete list of linters available in lintr.

Tags

consistency, readability, style

Examples

# will produce lints
lint(
  text = "x <- .1",
  linters = numeric_leading_zero_linter()
)
#> <text>:1:6: warning: [numeric_leading_zero_linter] Include the leading zero for fractional numeric constants.
#> x <- .1
#>      ^~

lint(
  text = "x <- -.1",
  linters = numeric_leading_zero_linter()
)
#> <text>:1:7: warning: [numeric_leading_zero_linter] Include the leading zero for fractional numeric constants.
#> x <- -.1
#>       ^~

# okay
lint(
  text = "x <- 0.1",
  linters = numeric_leading_zero_linter()
)
#> ℹ No lints found.

lint(
  text = "x <- -0.1",
  linters = numeric_leading_zero_linter()
)
#> ℹ No lints found.