raku App::Crag

Calculator using RAku Grammars for the command line

Install

zef install App::Crag

Usage

Use the crag command:

crag [--help] <cmd>

Use the crag REPL:

crag

use 'exit' to exit the REPL

For LLM::DWIM features, you will need e.g. a Gemini App Key

Examples

Usage:
    crag [--help] <cmd>
    -or-
    crag -> REPL
Examples:
    [1] (1.6km / (60 * 60 * 1s)).in: <mph>       #0.99mph
    [2] $m=95kg; $a=^<9.81 m/s^2>; $m*$a         #931.95N
    [3] ^<12.5 ft ±3%> .in: <mm>                 #3810mm ±114.3
    [4] $λ=2.5nm; $ν=c/$λ; $ν.norm               #119.91PHz
    [5] $c=^<37 °C>; $f=^<98.6 °F>; $f cmp $c    #Same
    [6] @physics-constants-symbols.join: "\n"    # ...
    [7] ?^<TNT energy in J/kg>                   #4184000J/kg
    [8] US$42 .in: <£>                           #31.41GBP
More info:
    - https://github.com/librasteve/raku-Physics-Measure.git
    - https://github.com/librasteve/raku-Physics-Unit.git
    - https://github.com/librasteve/raku-Physics-Error.git
    - https://github.com/librasteve/raku-Physics-Constants.git
    - https://github.com/raku-community-modules/Slang-Roman
    - https://github.com/bduggan/raku-llm-dwim
- crag goes '^<value units [±error]>' => 'Physics::Measure.new: :$value, :$units :$error' )
- crag goes sub r( $x = 0.01 ) { $Physics::Measure::round-val = $x }
- crag goes ```subst( '§|(.+?)|' => 'Q|$0|.AST.EVAL' )```
- crag goes '?<something>' => dwim )
- crag goes '?^<something in units>' => dwim => 'Physics::Measure.new: value => dwim, :$units' )
- echo RAKULANG='en_US' for us gallons, pints, mpg, etc.
- zef install Physics::Units --force-install to refresh currency rates

More Info

• https://github.com/librasteve/raku-Physics-Measure.git
• https://github.com/librasteve/raku-Physics-Unit.git
• https://github.com/librasteve/raku-Physics-Error.git
• https://github.com/librasteve/raku-Physics-Constants.git
• https://github.com/raku-community-modules/Slang-Roman
• https://github.com/bduggan/raku-llm-dwim

Copyright

copyright(c) 2023-2025 Henley Cloud Consulting Ltd.