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BEGIN {
chapters["Getting Started"]++
chapters["Invoking Gawk"]++
chapters["Regexp"]++
chapters["Reading Files"]++
chapters["Printing"]++
chapters["Expressions"]++
chapters["Patterns and Actions"]++
chapters["Arrays"]++
chapters["Functions"]++
chapters["Library Functions"]++
chapters["Sample Programs"]++
chapters["Advanced Features"]++
chapters["Internationalization"]++
chapters["Debugger"]++
chapters["Arbitrary Precision Arithmetic"]++
chapters["Dynamic Extensions"]++
chapters["Language History"]++
chapters["Installation"]++
chapters["Notes"]++
chapters["Basic Concepts"]++
Pattern = ".*@ref\\{([^}]+)\\},.*"
}
$0 ~ Pattern {
ref = gensub(Pattern, "\\1", 1, $0)
if (! (ref in chapters))
printf("%s:%d: %s\n", FILENAME, FNR, $0)
}
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