line_length_linter: Line length linter

In lintr: A 'Linter' for R Code

Line length linter

Description

Check that the line length of both comments and code is less than length.

Usage

line_length_linter(length = 80L, ignore_string_bodies = FALSE)

Arguments

length	Maximum line length allowed. Default is 80L (Hollerith limit).
ignore_string_bodies	Logical, default FALSE. If TRUE, the contents of string literals are ignored. The quotes themselves are included, so this mainly affects wide multiline strings, e.g. SQL queries.

Tags

configurable, default, readability, style

See Also

• linters for a complete list of linters available in lintr.

• https://style.tidyverse.org/syntax.html#long-lines

Examples

# will produce lints
lint(
  text = strrep("x", 23L),
  linters = line_length_linter(length = 20L)
)

# the trailing ' is counted towards line length, so this still lints
lint(
  text = "'a long single-line string'",
  linters = line_length_linter(length = 15L, ignore_string_bodies = TRUE)
)

lines <- paste(
  "query <- '",
  "  SELECT *",
  "  FROM MyTable",
  "  WHERE profit > 0",
  "'",
  sep = "\n"
)
writeLines(lines)
lint(
  text = lines,
  linters = line_length_linter(length = 10L)
)

# okay
lint(
  text = strrep("x", 21L),
  linters = line_length_linter(length = 40L)
)

lines <- paste(
  "paste(",
  "  'a long',",
  "  'single-line',",
  "  'string'",
  ")",
  sep = "\n"
)
writeLines(lines)
lint(
  text = lines,
  linters = line_length_linter(length = 15L, ignore_string_bodies = TRUE)
)

lines <- paste(
  "query <- '",
  "  SELECT *",
  "  FROM MyTable",
  "  WHERE profit > 0",
  "'",
  sep = "\n"
)
writeLines(lines)
lint(
  text = lines,
  linters = line_length_linter(length = 10L, ignore_string_bodies = TRUE)
)

lintr documentation built on Nov. 27, 2025, 9:06 a.m.