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More intro text on combining with C code

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* doc/ref/intro.texi (Combining with C): New paragraph.
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Neil Jerram 2009-12-21 01:02:56 +00:00
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@ -107,6 +107,18 @@ control structures, and even syntax to Guile, creating a domain-specific
language tailored to the task at hand, but based on a robust language
design.
This kind of combination is helped by four aspects of Guile's design
and history. First is that Guile has always been targeted as an
extension language. Hence its C API has always been of great
importance, and has been developed accordingly. Second and third are
rather technical points -- that Guile uses conservative garbage
collection, and that it implements the Scheme concept of continuations
by copying and reinstating the C stack -- but whose practical
consequence is that most existing C code can be glued into Guile as
is, without needing modifications to cope with strange Scheme
execution flows. Last is the module system, which helps extensions to
coexist without stepping on each others' toes.
Guile's module system allows one to break up a large program into
manageable sections with well-defined interfaces between them.
Modules may contain a mixture of interpreted and compiled code; Guile