= crystal-tool-unreachable(1)
:doctype: manpage
:date: {localdate}
:crystal_version: {crystal_version}
:man manual: Crystal Compiler Command Line Reference Guide
:man source: crystal {crystal_version}

== Name
crystal-tool-unreachable - Identify methods that are never called

== Synopsis
*crystal tool unreachable* [options] [source...]

== Description

Show methods that are never called. The text output is a list
of lines with columns separated by tab.

Output fields:

*count*::	 sum of all calls to this method (only with *--tallies* option; otherwise skipped)
*location*::	 pathname, line and column, all separated by colon name
*lines*::	 length of the def in lines annotations

== Options

*-D* _FLAG_, *--define*=_FLAG_::
  Define a compile-time flag. This is useful to con    ditionally define types,
  methods, or commands based on flags available at compile time. The default
  flags are from the target triple given with *--target-triple* or the hosts
  default, if none is given.
*-f* _FORMAT_, *--format*=_FORMAT_::
  Output format 'text' (default), 'json', 'codecov', or 'csv'.
*--tallies*::
  Print reachable methods and their call counts as well.
*--check*::    Exit with error if there is any unreachable code.
*-i* _PATH_, *--include*=_PATH_::
  Include path in output.
*-e* _PATH_, *--exclude*=_PATH_::
  Exclude path in output (default: lib).
*--error-trace*::
  Show full error trace.
*--prelude*::
  Specify prelude to use. The default one initializes the garbage collector. You
  can also use *--prelude=empty* to use no preludes. This can be useful for
  checking code generation for a specific source code file.