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Fix bug in like terms collection in expression simplification Like term collection would lose the actual "variable" part of the term if the second term collected happened to have no coefficient. This would cause the expression to take the value of the calculated coefficient which is obviously wrong. Thanks to hider <stego@satx.rr.com> for reporting the bug and providing a proper test case. Observation: this bug has been present since the first pre-release of lwtools 3.0 when the algebraic expression system was introduced. Apparently people tend not to create expressions that trigger the like terms handler. The specific conditions require the symbol to be undefined and the second operand to the addition has to have no coefficient so it's likely a fairly rare scenario. Still, it is somewhat surprising that nobody tripped on it before now.
author William Astle <lost@l-w.ca>
date Mon, 23 Jan 2017 22:58:36 -0700
parents 4e12d881df85
children 659e0e4ce50c
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1 See the file GPL3 for a copy of the GNU General Public License, version 3,
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2 under which the majority of this distribution is licensed.
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2c24602be78f Initial import from lwtools 3.0.1 version, with new hand built build system and file reorganization
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3
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4 Some specific source files, including many of those in the lwcc subdirectory
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5 are licensed differently. See each individual file for specific details.