Re: DMD compiler - warning of unused variables
On Monday, 16 August 2021 at 14:14:27 UTC, DLearner wrote: Hi Please see code below: ``` void main() { import std.stdio; size_t i; size_t j; i = 5; writeln("i = ",i); } ``` Is there a compiler option that would warn that variable 'j' is defined but not used? Best regards Hi, not compiler, but with dscanner it is possible, in fact with the code-d vscode extension, you get that out of the box with visual hints! Take a look at this screenshot: https://i.imgur.com/TGkgY3e.png If you click on the line, it jumps automatically to the right line, very nice tooling
Re: DMD compiler - warning of unused variables
On Monday, 16 August 2021 at 14:14:27 UTC, DLearner wrote: Is there a compiler option that would warn that variable 'j' is defined but not used? Best regards No in DMD but you can use [D-Scanner](https://code.dlang.org/packages/dscanner) for that. The check works reasonably as long as the variables are not introduced by `mixin()` or metaprog.
Re: DMD compiler - warning of unused variables
On Monday, 16 August 2021 at 14:14:27 UTC, DLearner wrote: Hi Please see code below: ``` void main() { import std.stdio; size_t i; size_t j; i = 5; writeln("i = ",i); } ``` Is there a compiler option that would warn that variable 'j' is defined but not used? Best regards dmd is anti-warning, so it'd have to be an error, which might be more annoying than it's worth. `dscanner --report thefile.d` includes "Variable j is never modified and could have been declared const or immutable." and "Variable j is never used." as issues, with line and column numbers.
Re: DMD compiler - warning of unused variables
No. https://github.com/dlang-community/D-Scanner#implemented-checks
DMD compiler - warning of unused variables
Hi Please see code below: ``` void main() { import std.stdio; size_t i; size_t j; i = 5; writeln("i = ",i); } ``` Is there a compiler option that would warn that variable 'j' is defined but not used? Best regards