feat: allow unary subtraction operator in SEDML validation #139
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What new features does this PR implement?
While validating SEDML documents, the
evalidate
library is used to check mathematical expressions used in a SEDML document (e.g. withinFunctionalRange
math). This validation does not permit use of the unary subtract operator which is common and safe. This maps to the Python AST as 'USub'.What bugs does this PR fix?
This fixes the validation of several Virtual Cell models which use the unary subtract within its math. The SEDML validation encounters the use of unary subtract operator and raises a validation failure (a false-negative result).
Does this PR introduce any additional changes?
No.
How have you tested this PR?
added a test in
test_sedml_math.py
which exercises this operator.