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Preserve state of eval.was_boxing. #1861

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Preserve state of eval.was_boxing. #1861

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6 changes: 5 additions & 1 deletion mathics/format/box/makeboxes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -291,15 +291,19 @@ def format_element(
"""
Applies formats associated to the expression, and then calls Makeboxes
"""
was_boxing = evaluation.is_boxing
evaluation.is_boxing = True
formatted_expr = do_format(element, evaluation, form)
if form not in evaluation.definitions.boxforms:
formatted_expr = Expression(form, formatted_expr)
form = SymbolStandardForm
result_box = apply_makeboxes_rules(formatted_expr, evaluation, form)
if isinstance(result_box, BoxElementMixin):
evaluation.is_boxing = was_boxing
return result_box
return eval_makeboxes_fullform_recursive(element, evaluation)
result = eval_makeboxes_fullform_recursive(element, evaluation)
evaluation.is_boxing = was_boxing
return result


def to_boxes(x, evaluation: Evaluation, options={}) -> BoxElementMixin:
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