Joseph Percivall created NIFI-3149:
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Summary: Expression Language should support passing negative
numbers as literals
Key: NIFI-3149
URL: https://issues.apache.org/jira/browse/NIFI-3149
Project: Apache NiFi
Issue Type: Improvement
Reporter: Joseph Percivall
Assignee: Joseph Percivall
Priority: Trivial
Currently using "${literal(-5.5):toNumber()" will result in an anltr parsing
exception due to '-' not being handled in the Lexer[1].
In the ANTLR lexer, "+" and "-" should be added a potential values at the
beginning of a WHOLE_NUMBER or DECIMAL.
A workaround is to place the number in quotes: ${literal("-5.5"):toNumber()
[1]
https://github.com/apache/nifi/blob/master/nifi-commons/nifi-expression-language/src/main/antlr3/org/apache/nifi/attribute/expression/language/antlr/AttributeExpressionLexer.g#L80-L80
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