Editing SWIG (section)

== Example ==
SWIG wraps simple C declarations by creating an interface that closely matches the way in which the declarations would be used in a C program. For example, consider the following interface file:<ref>{{Cite web|url=https://www.swig.org/Doc4.2/SWIG.html#SWIG_nn9|title=SWIG Basics}}</ref>
<syntaxhighlight lang="swig">
%module example

%inline %{
extern double sin(double x);
extern int strcmp(const char *, const char *);
extern int Foo;
%}
#define STATUS 50
#define VERSION "1.1"
</syntaxhighlight>
In this file, there are two functions {{code|sin()}} and {{code|strcmp()}}, a global variable {{code|Foo}}, and two constants {{code|STATUS}} and {{code|VERSION}}. When SWIG creates an extension module, these declarations are accessible as scripting language functions, variables, and constants respectively. In Python:
<syntaxhighlight lang="pycon">
>>> example.sin(3)
0.141120008
>>> example.strcmp("Dave", "Mike")
-1
>>> print(example.cvar.Foo)
42
>>> print(example.STATUS)
50
>>> print(example.VERSION)
1.1
</syntaxhighlight>