Why does this expression return False instead of True ?
$true -or $false -and $false
-and should take precedence over -or, as confirmed by Microsoft Powershell documentation.
But it looks like the expression is evaluated as ($true -or $false) -and $false instead of $true -or ($false -and $false) !
Can someone explain to me what I'm missing here ?
The linked documentation does not state that -and takes precedence over -or - instead, it states that -and and -or - perhaps surprisingly[1] - have equal precedence[2] in PowerShell.
Thus:
$true -or $false -and $false
is - due to implied left-associativity - evaluated as:
($true -or $false) -and $false # -> $false
In other words: Use (...) to override this left-associativity on demand:
$true -or ($false -and $false) # -> $true
[1] See GitHub issue #8512 for a discussion.
[2] The docs list -and -or -xor on the same line, implying that that all these operators have equal precedence.