wxGUI/history: fix execute r/r3.mapcalc module command

[tmszi]

Fixes #3304.

[tmszi]

Rebase and resolve conflicts 86a9609

[petrasovaa]

Looks like using minus causes some problems for the parsing:

r.mapcalc "test = a - b"

and then using partial parameter name like:

r.mapcalc expr="test = a"

is failing too, but that's probably harder to address.
It may be better to put the parsing function elsewhere, maybe core.utils?

[tmszi]

r.mapcalc expr="test = a"

Looks like using minus causes some problems for the parsing:

r.mapcalc "test = a - b"

and then using partial parameter name like:

r.mapcalc expr="test = a"

is failing too, but that's probably harder to address. It may be better to put the parsing function elsewhere, maybe core.utils?

Thanks for catching that. Fixed with c64ab82.

[petrasovaa]

Works great!
The only thing is it won't parse correctly the shortened variations of 'expression' parser enables (except 'expr'), so that's a limitation I would just accept for now.

[tmszi]

Works great! The only thing is it won't parse correctly the shortened variations of 'expression' parser enables (except 'expr'), so that's a limitation I would just accept for now.

I forgot that it is possible to use a shortened version of the r.mapcalc module expression parameter (e|ex|exp|expr|expre|expres|express|expressi|expressio|expression), because I always used expression or expr param name, I fixed it with db6a00c.

[petrasovaa]

Works great! The only thing is it won't parse correctly the shortened variations of 'expression' parser enables (except 'expr'), so that's a limitation I would just accept for now.

I forgot that it is possible to use a shortened version of the r.mapcalc module expression parameter (e|ex|exp|expr|expre|expres|express|expressi|expressio|expression), because I always used expression or expr param name, I fixed it with db6a00c.

I am wondering, would this be a problem in case you use something like:

r.mapcalc exp="test = a + e"
r.mapcalc exp="test = a + exp(5)"

[tmszi]

I am wondering, would this be a problem in case you use something like:

It works as expected. However, I can add it to the func doc test.