fixed subtle operator precedence bug

* It was possible to provoke operator right-associativity when placing a high-precedence
  operator between two low-precedence operators.
  1-6*5-1 evaluated to -28 instead of the expected -30.
* The reason is that SciTECO relies on operators to be resolved from left-to-right as soon as possible.
  The higher precedence operator prevents that and pushing the 2nd "-" only evaluated 6*5.
  At the end 1-30-1 would be left on the stack.
  teco_expressions_eval() however evaluates from right-to-left which is wrong in this case.
* Instead, we now do a full eval on every operator with a lower precedence, making sure that 1-30 is
  evaluated first.

0 files changed, 0 insertions, 0 deletions