adjoint(y::Symbolic{<:Number})

[ChristophHotter]

I added the method adjoint(y::Symbolic{<:Number}) = conj(s).
This is what Julia does for example with adjoint(1im).

[github-actions]

Benchmark Results

	master	803c555...	master/803c55557a2dd6...
overhead/acrule/a+2	0.743 ± 0.021 μs	0.743 ± 0.027 μs	1
overhead/acrule/a+2+b	0.723 ± 0.017 μs	0.714 ± 0.019 μs	1.01
overhead/acrule/a+b	0.263 ± 0.0059 μs	0.254 ± 0.011 μs	1.04
overhead/acrule/noop:Int	25.9 ± 0.05 ns	26.2 ± 0.05 ns	0.988
overhead/acrule/noop:Sym	0.0364 ± 0.0057 μs	0.0434 ± 0.0059 μs	0.84
overhead/rule/noop:Int	0.0448 ± 0.0011 μs	0.045 ± 0.0011 μs	0.995
overhead/rule/noop:Sym	0.0546 ± 0.0031 μs	0.0548 ± 0.0026 μs	0.996
overhead/rule/noop:Term	0.0538 ± 0.0029 μs	0.0557 ± 0.0027 μs	0.967
overhead/ruleset/noop:Int	0.13 ± 0.0044 μs	0.129 ± 0.0036 μs	1
overhead/ruleset/noop:Sym	0.146 ± 0.0054 μs	0.148 ± 0.0037 μs	0.986
overhead/ruleset/noop:Term	3.01 ± 0.089 μs	3.22 ± 0.11 μs	0.935
overhead/simplify/noop:Int	0.143 ± 0.0036 μs	0.136 ± 0.0016 μs	1.05
overhead/simplify/noop:Sym	0.167 ± 0.0058 μs	0.157 ± 0.0041 μs	1.06
overhead/simplify/noop:Term	0.0361 ± 0.0016 ms	0.0368 ± 0.0015 ms	0.98
overhead/simplify/randterm (+, *):serial	0.0851 ± 0.0016 s	0.0878 ± 0.0024 s	0.969
overhead/simplify/randterm (+, *):thread	0.0501 ± 0.03 s	0.0523 ± 0.028 s	0.957
overhead/simplify/randterm (/, *):serial	0.212 ± 0.0061 ms	0.209 ± 0.0064 ms	1.01
overhead/simplify/randterm (/, *):thread	0.239 ± 0.0073 ms	0.239 ± 0.0079 ms	0.997
overhead/substitute/a	0.0591 ± 0.0016 ms	0.0602 ± 0.0015 ms	0.981
overhead/substitute/a,b	0.0523 ± 0.0015 ms	0.0528 ± 0.0016 ms	0.991
overhead/substitute/a,b,c	17.7 ± 0.63 μs	16.8 ± 0.67 μs	1.05
polyform/easy_iszero	29.4 ± 4 μs	30.5 ± 2.5 μs	0.963
polyform/isone	4.02 ± 0.01 ns	2.79 ± 0.01 ns	1.44
polyform/iszero	1.12 ± 0.036 ms	1.13 ± 0.027 ms	0.994
polyform/simplify_fractions	1.62 ± 0.047 ms	1.68 ± 0.055 ms	0.966
time_to_load	2.12 ± 0.017 s	2.12 ± 0.014 s	1

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR.
Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).

[bowenszhu]

Thanks for the PR! Could you add some tests?

[ChristophHotter]

Yes, I added tests for Real and Complex syms.

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.92%. Comparing base (0288135) to head (78bcdb7).
Report is 3 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #635      +/-   ##
==========================================
+ Coverage   81.86%   81.92%   +0.06%     
==========================================
  Files          16       16              
  Lines        1908     1909       +1     
==========================================
+ Hits         1562     1564       +2     
+ Misses        346      345       -1     

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[bowenszhu]

Looks good. Thank you!

https://github.com/JuliaLang/julia/blob/6f3fdf7b36250fb95f512a2b927ad2518c07d2b5/base/number.jl#L225

[ChristophHotter]

Thanks!