R Under development (unstable) (2023-12-09 r85665 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> suppressPackageStartupMessages(library(float))
> tol = 1e-6
> 
> x = matrix(1:10, 5)
> s = fl(x)
> 
> test = dbl(rbind(s, s))
> truth = rbind(x, x)
> stopifnot(all.equal(test, truth))
> 
> test = dbl(rbind(s, 1L))
> truth = rbind(x, 1L)
> stopifnot(all.equal(test, truth))
> 
> test = rbind(s, 1.0)
> truth = rbind(x, 1.0)
> stopifnot(all.equal(test, truth))
> 
> 
> 
> test = dbl(cbind(s, s))
> truth = cbind(x, x)
> stopifnot(all.equal(test, truth))
> 
> test = dbl(cbind(s, 1L))
> truth = cbind(x, 1L)
> stopifnot(all.equal(test, truth))
> 
> test = cbind(s, 1.0)
> truth = cbind(x, 1.0)
> stopifnot(all.equal(test, truth))
> 
> proc.time()
   user  system elapsed 
   0.29    0.06    0.34