fix: Add mod operator, expressions

Author: effigies

src/schema/meta/expression_tests.yaml

@@ -74,6 +74,14 @@
 # General expressions
 - expression: 1 + 2
   result: 3
+- expression: 1 - 2
+  result: -1
+- expression: 3 * 4
+  result: 12
+- expression: 3 / 2
+  result: 1.5
+- expression: 3 % 2
+  result: 1
 - expression: '"cat" + "dog"'
   result: 'catdog'
 - expression: match('string', '.*')

tools/schemacode/src/bidsschematools/expressions.py

@@ -62,7 +62,7 @@ def parse(expression_string: str) -> "ASTNode":
 notOp = Literal("!")
 compOp = one_of(("==", "!=", "<", "<=", ">", ">=", "in"))
 addOp = one_of(("+", "-"))
-mulOp = one_of(("*", "/"))
+mulOp = one_of(("*", "/", "%"))
 expOp = Literal("**")
 
 lpar, rpar = Suppress("("), Suppress(")")