\documentclass{article}

\def\id{my previous definition}

\usepackage{pseudo}

\usepackage{tcolorbox}
\tcbuselibrary{skins,theorems}

\usepackage{noindentafter}
\NoIndentAfterEnv{pseudo}
\NoIndentAfterEnv{pseudo*}

\title{Tests for the \textsf{pseudo} package}
\author{Magnus Lie Hetland}

\begin{document}
\maketitle

\noindent
This document is an attempt to use the features of the \textsf{pseudo} package
without any other dependencies (as opposed to the \textsf{pseudo}
documentation), e.g., to determine whether it's usable with an older \TeX\
distribution.

\section*{Fonts and styling}

The previous definition of \verb|\id| is: \id\\
\let\id\pseudoid

\bigskip
\noindent
\begin{tabular}{@{}ll@{}}
\verb|\cmd|       & \verb|\pseudocmd|\\
\kw{while}        & \pseudokw{while}\\
\cn{false}        & \pseudocn{false}\\
\id{rank}         & \pseudoid{rank}\\
\st{Hello!}       & \pseudost{Hello!}\\
\pr{Euclid}(a b)  & \pseudopr{Euclid}(a b)\\
\fn{length}(A)    & \pseudofn{length}(A)\\
\fn{length}[A]    & \pseudofn{length}[A]\\
\ct{Important!}   & \pseudoct{Important!}\\
\end{tabular}

{\pseudoset{
    kwfont=KW:~,
    cnfont=CN:~,
    idfont=ID:~,
    stfont=ST:~,
    st-left=[,
    st-right=],
    prfont=PR:~,
    fnfont=FN:~,
    ctfont=CT:~,
    ct-left=[,
    ct-right=],
}
\bigskip
\noindent
\begin{tabular}{@{}ll@{}}
\verb|\cmd|       & \verb|\pseudocmd|\\
\kw{while}        & \pseudokw{while}\\
\cn{false}        & \pseudocn{false}\\
\id{rank}         & \pseudoid{rank}\\
\st{Hello!}       & \pseudost{Hello!}\\
\pr{Euclid}(a b)  & \pseudopr{Euclid}(a b)\\
\fn{length}(A)    & \pseudofn{length}(A)\\
\fn{length}[A]    & \pseudofn{length}[A]\\
\ct{Important!}   & \pseudoct{Important!}\\
\end{tabular}}

% The one on the line is ignored:
\begin{pseudo}[hpad, dim-color=red, kw][dim-color=blue, dim]
    foo \\[hl]
    bar
\end{pseudo}

Should be \verb|\fn{test}[A]| followed by \verb|(B)| in normalfont:
\fn{test}[A](B)

\bigskip
\noindent
Should be \verb|\fn{test}(A)| followed by \verb|[B]| in normalfont:
\fn{test}(A)[B]

\section*{Declarations and definitions}

\DeclarePseudoComment \Imp {Important!}
\DeclarePseudoConstant \False {false}
\DeclarePseudoFunction \Ln {length}
\DeclarePseudoIdentifier \Rank {rank}
\DeclarePseudoKeyword \While {while}
\DeclarePseudoNormal \Error {halt with an error message}
\DeclarePseudoProcedure \Euclid {Euclid}
\DeclarePseudoString \Hello {Hello!}

\begin{pseudo*}
$x = y$ \qquad \Imp \\
\False \\
\Ln(A) or \Ln[A] \\
\Rank \\
\While \\
\Error \\
\Euclid(a, b) \\
\Hello
\end{pseudo*}

\pseudodefinestyle{mystyle}{
    font = \Large
}

\begin{pseudo*}[mystyle]
Hello, world!
\end{pseudo*}

\section*{Notation}

$A[1\..n] \== B[2\..n+1]$ \\
$A[1\dts n] \eqs B[2\dts n+1]$ \\

\noindent
$\id{foo-bar:baz}$

\noindent
{\pseudoset{eqs-pad=10mu, eqs-scale=2, eqs-sep=5mu}$x\==y$}

\begin{pseudo*}[kw]
keyword \tn{normal} keyword \nf normal
\end{pseudo*}

\section*{Numbering and indentation}

\begin{pseudo}[start=2, label=(\Roman*), label-align=l, ref=\Roman*]
    one \\
    two \label{linetwo} \\*
? & three \\
\end{pseudo}

\begin{pseudo}*
\hd{Header}(\id{args}) \\
first line
\end{pseudo}

Reference to line~\ref{linetwo}.

\begin{pseudo}[hpad=1cm, hsep=.1cm, indent-length=2cm, indent-level=1]
A \\+
B \\++
C \\-
D \\---
E
\end{pseudo}

\begin{pseudo*}[indent-text={otherwise\ }]
if this \\+
    then that \\-
otherwise something else
\end{pseudo*}

\section*{Layout}

Here's a compact piece of pseudocode:
\begin{pseudo*}[kw, compact]
print \st{42}
\end{pseudo*}

Automatically compact:
\fbox{\begin{pseudo*}
In a box.
\end{pseudo*}}

\begin{pseudo}[left-margin=\parindent]
indented
\end{pseudo}

\begin{pseudo}[line-height=2]
lines \\
far \\
apart
\end{pseudo}

\begin{pseudo}[topsep=1cm, partopsep=1cm]
custom topsep and partopsep
\end{pseudo}

Adjustments based on depth:

\bigskip

{
\pseudoset{hl-warn=false}

\parskip0pt % Default
\topsep0pt
\partopsep0pt
\noindent
\begin{minipage}[t]{2em}
.

\begin{pseudo*}[hl]
(x) \\
x \\
x \\
(x)
\end{pseudo*}%
\end{minipage}%
%
%
%
\begin{minipage}[t]{2em}
.

\begin{pseudo*}[hl]
x \\
x \\
x \\
x
\end{pseudo*}%
\end{minipage}%
%
%
%
\begin{minipage}[t]{2em}%
.

\begin{tabular}[t]{@{}l@{}}
x \\
x \\
x \\
x
\end{tabular}%
\end{minipage}
%
%
%
\begin{minipage}[t]{2em}%
.

x

\begin{tabular}[t]{@{}l@{}}
x \\
x
\end{tabular}%

\prevdepth=.3\baselineskip

x
\end{minipage}%
%
%
%
\begin{minipage}[t]{2em}
.

x

\begin{pseudo*}[hl]
x \\
x
\end{pseudo*}%

x
\end{minipage}%
%
%
%
\begin{minipage}[t]{2em}
.

g

\begin{pseudo*}[hl]
x \\
x
\end{pseudo*}%

x
\end{minipage}%
%
%
%
\begin{minipage}[t]{2em}
.

x

\begin{pseudo*}[hl]
x \\
x
\end{pseudo*}%

A
\end{minipage}%
%
%
%
\begin{minipage}[t]{2em}
.

(x)

\begin{pseudo*}[hl]
x \\
x
\end{pseudo*}%

(x)
\end{minipage}%
%
%
%
\begin{minipage}[t]{2em}
.

\strut x

\begin{pseudo*}[hl]
x \\
x
\end{pseudo*}%

\strut x
\end{minipage}%
}

\section*{Overlays etc.}

Ignored outside \textsf{beamer}.

\begin{pseudo}[pause, kwfont<3>=\nf, unknown<3>=42]
    foo \\<2>
    % bar \\ <3> % Dosn't work in older xparse versions
    baz
\end{pseudo}

\clearpage

\section*{Boxes and floats; spacing}

Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod
tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua.

\begin{tcolorbox}[pseudo/tworuled]
    Test: $f(x)$
\end{tcolorbox}

\begin{tcolorbox}[pseudo/tworuled]
    Foobar
\end{tcolorbox}

\noindent
At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd
gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.

\begin{pseudo}
foo \\
bar \\
baz
\end{pseudo}

\begin{pseudo}
foo \\
bar \\
baz
\end{pseudo}

Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod
tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At
vero eos et accusam et justo duo dolores et ea rebum.

\begin{tcolorbox}[pseudo/filled, float]
Testing. $x\== y$.
\end{tcolorbox}

\section*{Extra space}

\begin{pseudo}[indent-mark, extra-space=1.5ex]
Alpha \\+
Beta  \\+[1cm]
Gamma
\end{pseudo}


% Should emit three warnings:
% \pseudoslash
% \pseudoslash
% \pseudoslash

% Should emit three warnings:
% \pseudoeq
% \pseudoeq
% \pseudoeq


% Things that could also be tested:
% begin-tabular
% bol
% bol-append
% bol-prepend
% eol
% eol-append
% eol-prepend
% preamble
% prefix
% pseudoeq
% RestorePseudoBackslash
% setup
% setup-append
% setup-prepend
% starred

\end{document}