This is my revised TAP grammar. I'm using this to drive development of the TAPx::Parser. If you're not familiar with reading this style of grammar, here are a few comments:

I'm using POSIX character classes to represent digits and printable characters. If you want to manually encode all of the Unicode characters for [:print:], be my guest :)

The following means "all printable characters except the newline".

([:print:] - "\n")

The following means, a digit followed by zero or more digits.

digit {digit}

A question mark after an atom means it's optional.

I'm not particularly gifted with grammars, so corrections welcome.

The corrected TAP grammar:

digit              ::= [:digit:]
character          ::= ([:print:] - "\n")
positiveInteger    ::= ( digit - '0' ) {digit}
nonNegativeInteger ::= digit {digit}

tap         ::= plan tests | tests plan {comment}
plan        ::= '1..' nonNegativeInteger "\n"
lines       ::= line {lines}
line        ::= (comment | test) "\n"
tests       ::= test {test}
test        ::= status positiveInteger? description? directive?
status      ::= 'not '? 'ok '
description ::= (character - (digit '#')) {character - '#'}
directive   ::= '#' ( 'TODO' | 'SKIP' ) ' ' {character}
comment     ::= '#' {character}

[download]

For purposes of forward compatability, all lines which do not match the grammar are labeled as TAPx::Parser::Result::Unknown and are not considered parse errors.

Cheers,
Ovid

New address of my CGI Course.

In reply to Revised TAP Grammar by Ovid

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