What command should I use to be warned of this collision beforehand?











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After a hunt through several subfiles, I've narrowed down what I thought was a bug down to this MWE



documentclass{article}

usepackage{amsmath, amssymb}

newcommand{R}{mathbb{R}}

begin{document}

$R$

newdimenR

R=.4cm

$R$

end{document}


Clearly user error. Although this is what I get for copy and pasting code without paying too close attention to the variables they use. What commands should I use to be warned of this collision in compiling instead of getting the error ! Missing number... and having to scour several files for what this could be?



I feel like this is along the lines of def versus newcommand.






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    down vote

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    After a hunt through several subfiles, I've narrowed down what I thought was a bug down to this MWE



    documentclass{article}
    
usepackage{amsmath, amssymb}
    
newcommand{R}{mathbb{R}}
    
begin{document}
    
$R$
    
newdimenR
    
R=.4cm
    
$R$
    
end{document}


    Clearly user error. Although this is what I get for copy and pasting code without paying too close attention to the variables they use. What commands should I use to be warned of this collision in compiling instead of getting the error ! Missing number... and having to scour several files for what this could be?



    I feel like this is along the lines of def versus newcommand.






    tex-core






    share
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      After a hunt through several subfiles, I've narrowed down what I thought was a bug down to this MWE



      documentclass{article}
      
usepackage{amsmath, amssymb}
      
newcommand{R}{mathbb{R}}
      
begin{document}
      
$R$
      
newdimenR
      
R=.4cm
      
$R$
      
end{document}


      Clearly user error. Although this is what I get for copy and pasting code without paying too close attention to the variables they use. What commands should I use to be warned of this collision in compiling instead of getting the error ! Missing number... and having to scour several files for what this could be?



      I feel like this is along the lines of def versus newcommand.






      tex-core






      share













      After a hunt through several subfiles, I've narrowed down what I thought was a bug down to this MWE



      documentclass{article}
      
usepackage{amsmath, amssymb}
      
newcommand{R}{mathbb{R}}
      
begin{document}
      
$R$
      
newdimenR
      
R=.4cm
      
$R$
      
end{document}


      Clearly user error. Although this is what I get for copy and pasting code without paying too close attention to the variables they use. What commands should I use to be warned of this collision in compiling instead of getting the error ! Missing number... and having to scour several files for what this could be?



      I feel like this is along the lines of def versus newcommand.






      tex-core




      tex-core





      share












      share










      share



      share










      asked 4 mins ago









      Robert Wolfe

      1009




      1009



























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