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Messages > Standstill
Despite of parsing, the position in the input wasn't changed.
A token, which matches the text, must match at least one character. A token like
Token A:: = a*
Production ::= A
would match at any position of the text, because the character 'a' will be there at least null times. A production like ( A )* would cause an endless loop. An optional occurrence of a concatenation of 'a'-characters should be written as:
Token A ::= a+
Production ::= ( A )?
This page belongs to the TextTransformer Documentation
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