Next: Key bindings and useful functions, Previous: Results of evaluation, Up: Working With Source Code
The “noweb” (see http://www.cs.tufts.edu/~nr/noweb/) Literate Programming system allows named blocks of code to be referenced by using the familiar Noweb syntax:
<<code-block-name>>
When a code block is tangled or evaluated, whether or not
“noweb” references are expanded depends upon the
value of the :noweb header argument. If :noweb
yes, then a Noweb reference is expanded before evaluation.
If :noweb no, the default, then the reference is not
expanded before evaluation.
Note: the default value, :noweb no, was chosen to
ensure that correct code is not broken in a language, such as
Ruby, where <<arg>> is a syntactically
valid construct. If <<arg>> is not
syntactically valid in languages that you use, then please
consider setting the default value.