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17 commits

Author SHA1 Message Date
David Adam
91a0ba9be5 Revert part of "Revert "Cache math expressions"" 
56d9134534 contained an LRU cache plus
changes to the documentation; 95162ef19d
reverted both.

This commit re-adds the documentation changes, which are still correct.
 2017-09-01 21:55:50 +08:00
ridiculousfish
95162ef19d Revert "Cache math expressions" 
This reverts commit 56d9134534.

An LRU cache in the shell for math seems like overkill.
 2017-09-01 00:25:40 -07:00
Kurtis Rader
56d9134534 Cache math expressions 
This implements an LRU cache of recently seen math expressions. When
executing math inside loops and the like this can provide a 33% decrease
in the time to execute the `math` command.
 2017-08-24 12:18:39 -07:00
Kurtis Rader
b816cd6d50 Change how math rounds integer results 
We need our `math` builtin to behave like `bc` with respect to rounding
floating point values to integer to avoid breaking to many existing
uses. So when scale is zero round down to the nearest integer.

Another change for #3157.
 2017-08-23 17:31:04 -07:00
Kurtis Rader
24d251ff4b Implement support for multiple math expressions 
The MuParser supports the concept of multiple expressions separated by
commas. This implements support for that so that you can do things like
this:

    set results (math '1+1, 4*2, 9^2')
 2017-08-23 17:14:54 -07:00
Kurtis Rader
41a7b9457c Implement bare minimum builtin math command 
This is the second baby step in resolving #3157. Implement a bare minimum
builtin `math` command. This is solely to ensure that fish can be built
and run in the Travis build environments. This is okay since anyone running
`builtin math` today is already getting an error response.

Also, more work is needed to support bare var references, multiple result
values, etc.
 2017-08-23 14:43:45 -07:00
Kurtis Rader
98449fec51 fix math regression 
The previous change to use `argparse` for parity with every other
builtin and function introduced a regression. Invocations that start
with a negative number can fail because the negative value looks like an
invalid flag.
 2017-07-14 16:03:31 -07:00
Kurtis Rader
d97c22df2d add floating point output to math command 
This makes it easy for the user to request floating point output with the
desired number of digits after the decimal point (not to be confused with
significant digits).

Note that this is just a thin wrapper so someone can say `math -s3 10 / 3`
rather than `math "scale=3; 10 /3"`.

Resolves #1643
 2016-05-03 19:29:04 -07:00
Mark Griffiths
137abd0cfa Make line length, wrapping and spacing consistent 2014-09-03 14:43:26 +01:00
Mark Griffiths
1052eeee8c Simplify styling 2014-09-03 14:43:25 +01:00
Mark Griffiths
d282bc4625 Documentation update 
Rework for Doxygen >1.8. Moved large parts of the documentation to a
simplified format, making use of Markdown enhancements and fixing bad
long options.
 2014-09-03 14:43:24 +01:00
Alan Thompson
07944cfd20 Change terminology in docs from 'environment variables' -> 'shell variables' 2014-04-29 07:27:56 +02:00
David Adam (zanchey)
1287b9d823 Help cleanup 
Large list of changes, including formatting and typos for most commands.

More substantive changes have been made to alias, bind, block, break,
builtin, case, cd, commandline, count, else, emit, fish_config, funced,
function, functions, history, math, mimedb, nextd, not, popd, prevd,
pushd, pwd, random, read, set, set_color, switch, test, trap, type,
ulimit, umask, and while.
 2013-05-13 01:48:20 -07:00
Grissiom
70322077d2 remove trialing spaces #2 2010-09-18 10:18:26 +08:00
axel
df55e89bbb Spelling fixes from Chris Rebert 
darcs-hash:20070801173524-ac50b-760d9ddf0e68aa24cd570b542824a7f2b3248ff5.gz
 2007-08-02 03:35:24 +10:00
axel
b3fa76c1be Extend documentation for the math function 
darcs-hash:20061212171037-ac50b-1b9d0f51b284925fe0fc3020774ec32bb1414ce7.gz
 2006-12-13 03:10:37 +10:00
axel
1b71f91a01 Update documentation display code to run roff on the client system instead of pregenerating documentation and compiling it into program binaries 
darcs-hash:20061117162438-ac50b-5c4c7f0bd8bf53a16e16ecfead9569e642b7160f.gz
 2006-11-18 02:24:38 +10:00