#5442: preparser or magma.eval bug?
----------------------------+-----------------------------------------------
Reporter: kohel | Owner: was
Type: defect | Status: new
Priority: minor | Milestone:
Component: user interface | Keywords:
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This works:
sage: s = """
x := [
1,
2,
3 ];
x;
"""
sage: magma.eval(s)
However, if one try to type the above interactively
in the %magma shell, it crashes on the the first line
'x := ['.
The problem is that either preparse_ipython or
magma.eval is too naive, inserting a ';' rather
than waiting for the completion of the expression.
As a start, I think the block:
if interface_name in ['gap', 'magma', 'kash', 'singular']:
if not line.endswith(';'):
line += ';'
should be deleted, but I don't know the Expect
interface well-enough to suggest a complete fix.
Remark: The magma.eval function handles for .. do,
but not if the logical is split over more than one
line, so maybe this function can be easily fixed
to not insert a ';' when an expression is incomplete
(e.g. '".."', 'for .. do', '[ .. ]', etc.).
Subtleties arise when a opening to an expression is
contained in a string.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5442>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of
Reinventing the Wheel
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