Skip to main content \(\require{cancel}\require{extpfeil}\newcommand{\definiteintegral}[4]{\int_{#1}^{#2}\,#3\,d#4}
\newcommand{\myequation}[2]{#1\amp =#2}
\newcommand{\indefiniteintegral}[2]{\int#1\,d#2}
\newcommand{\testingescapedpercent}{ \% }
\newcommand{\bvec}{{\mathbf b}}
\newcommand{\vvec}{{\mathbf v}}
\newcommand{\class}[2][\sim]{\lbrack #2\rbrack_{#1}}
\newcommand{\lt}{<}
\newcommand{\gt}{>}
\newcommand{\amp}{&}
\definecolor{fillinmathshade}{gray}{0.9}
\newcommand{\fillinmath}[1]{\mathchoice{\colorbox{fillinmathshade}{$\displaystyle \phantom{\,#1\,}$}}{\colorbox{fillinmathshade}{$\textstyle \phantom{\,#1\,}$}}{\colorbox{fillinmathshade}{$\scriptstyle \phantom{\,#1\,}$}}{\colorbox{fillinmathshade}{$\scriptscriptstyle\phantom{\,#1\,}$}}}
\newcommand{\sfrac}[2]{{#1}/{#2}}
\)
Section 30 Literate Programming
There is support for literate programming using the
<fragment> tag. It should always contain an
@@xml:id or a
@@filename attribute, and may contain
<code> segments as well as
<fragref> segments referencing other fragments. The final code is to be assembled starting from a fragment with a filename attribute and traversing the tree of fragment references.
For example here is the gcd algorithm in Python. Note that indentation is hard to get right at the moment.
ใ1 The GCD algorithmใ โก Root of file: gcd.py
def gcd(a, b):
while(b):
ใThe key loop part 2ใ
The key part is the inner part of the loop
ใ2 The key loop partใ โก
a, b = b, a % b
This double assignment changes both a and b.
