constant-condition

Flag a true/false literal used as an if/elseif/while test or as an operand of the short-circuit &&/||. The branch or short-circuit is decided before the code runs, so the literal is usually leftover debugging or a mistyped name. while true is exempt as Julia’s idiomatic infinite loop. No fix: removing the constant means restructuring the branch.

A literal if test always takes the branch:

if true
    println("always")
end

warning: constant-condition
 --> example.jl:1:4
  |
1 | if true
  |    ^^^^ this condition is always `true`

A literal operand decides && at parse time:

ok = false && check(x)

warning: constant-condition
 --> example.jl:1:6
  |
1 | ok = false && check(x)
  |      ^^^^^ `&&` has a constant `false` operand