GNU Info

(m4.info)Input Control

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Enter node , (file) or (file)node

Input control
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   This chapter describes various builtin macros for controlling the
input to `m4'.

Dnl

Deleting whitespace in input

Changequote

Changing the quote characters

Changecom

Changing the comment delimiters

Changeword

Changing the lexical structure of words

M4wrap

Saving input until end of input