% $Id: test-def.tex 63198 2022-05-01 15:18:17Z karl $
% This file is public domain.

\documentclass{report}
\newcommand{\defaultleftmargin}{0.25in}
%\setlength{\oddsidemargin}{\defaultleftmargin}
%\providecommand{\defaultmargin}{0.25in}\def\defx{\defy}

% based on report:
% Date: Mon, 25 Apr 2022 15:37:27 -0600
% From: Michael Clark
%
\def\ibx{\textit{#1}}          % \def with nested braces in rhs
\newcommand\ibx{\textit{#1}}   % \newcommand\foo
\newcommand{\ibx}{\textit{#1}} % \newcommand{\foo}
\newcommand{\ibx}{\textbf{\textit{#1}}} % more nesting

% *-form
\newcommand*{\ibxstar}{\textit{#1}}

% arg count
\newcommand{\ibx}[1]{\textit{#1}}

% optarg default
\newcommand{\ibx}[1][dflt]{\textit{#1}}


\begin{document}
\end{document}

% See Makefile.am for rebuild + test recipe.

% emacs-page
% [https://tug.org/pipermail/tex-live/2019-January/043083.html]
% 
% Date: Thu, 24 Jan 2019 19:11:18 -0800
% From: Zayd Hammoudeh <hammoudeh@gmail.com>
% To: <tex-live@tug.org>
% Subject: [tex-live] Possible lacheck Bug Report
% 
% [...]
% 
% In the simple LaTeX file:
% \documentclass{report}
%  
% \newcommand{\defaultleftmargin}{0.25in}
%  
% \begin{document}
% \end{document}
%  
% I get the following errors with lacheck:
% "hw01.tex", line 5: <- unmatched "end of file hw01.tex"
% "hw01.tex", line 2: -> unmatched "{"
% 
% This is reported by Vim's syntastic running lacheck ver. $Id:
% lacheck.lex,v 1.26 1998/03/07 07:46:45 abraham Exp $ on MacOS High
% Sierra. The issue only seems to arise when \newcommand is followed by
% {\def*} (where * is zero or more other characters). Removal of the curly
% brackets around \def* or any term other than def causes the issue to go away.
% 
% [...]
% 
% Edit: The issue appears to not be limited to newcommand. I get the same
% error for the line:
% \setlength{\oddsidemargin}{\defaultleftmargin} 


% emacs-page
% https://tug.org/pipermail/tex-live/2022-April/048096.html
% Date: Mon, 25 Apr 2022 15:37:27 -0600
% From: Michael Clark <clark.michael.c@gmail.com>
% To:  <tex-live@tug.org>
% Subject: lacheck is confused when curly brackets are inside a \newcommand
% 
% Example latex file (foo.tex):
% 
%     \newcommand{\boldx}[1]{{\bf #1}}
%     \newcommand{\ibx}[1]{\textbf{\textit{#1}}}
% 
% lacheck output:
% 
%     "foo.tex", line 1: <- unmatched "}"
%     "foo.tex", line 1: -> unmatched "beginning of file foo.tex"
%     "foo.tex", line 2: <- unmatched "}"
%     "foo.tex", line 1: -> unmatched "beginning of file foo.tex"
% 
% I pulled the example commands from
% https://www.physicsread.com/latex-bold/ showing two useful cases. One,
% using a command inside of a newcommand, and the other creates a group
% to isolate the scope of the command to the included text.
% 
% Replacing \newcommand with \newcommand* reports no error as expected.
% If an error is expected behavior for \newcommand, it would be nice if
% the error message were more clear, as the brackets are correctly
% matched.
% 
% Thank you for maintaining this tool. I'd need to devote longer than I
% have to figure out where to go from line 391 of lacheck.l
% (https://tug.org/svn/texlive/trunk/Build/source/utils/lacheck/lacheck.l?view=markup#l391)
