Switch branches/tags
Nothing to show
Find file Copy path
b3357e4 Jul 30, 2018
1 contributor

Users who have contributed to this file

645 lines (375 sloc) 15.7 KB


Table of Contents


DiceParser: What is it ?

DiceParser is a software component dedicated to roll dice through simple commands. This software component is available on different platform.
Such as: Irc bot, discord bot, included in Rolisteam, web server, on twitter etc.

How to roll a die

It is real simple. you have to call:


The first number is the count of dice you want to roll. The second number should be die's faces count.



Roll one six sided die.


Roll one ten sided die.


Roll five ten sided die.


Roll 777 six sided die.

Thanks of several operations and options, you can tune a bit your rolling command: see List of operator.

Roll dice in Range


Rolling 4 dice with value between -1 to 1. (Fudge/Fate system)


Rolling 3 dice with 10 faces starting at 0.


Rolling 3 dice, values are between -20 and -9.

Instruction: Roll two (or more) kinds of dice at once

To make it, you have to separate all dice commands by ;

1d10;1d6 # 2 instructions


5d6;1d10;4d100;3d20 # 4 instructions


It is possible to merge every instruction inside a huge one. The operator merge is dedicated to that. It is useful when you need to manage all diceresult as the same result.

For example, if you need to keep the higher dice between a d6 and d8.


More details about k operator in List of operator .

Computation between instructions

Thanks to variable system, it is possible to reference the result of a specific instruction.

  • To reference the first instruction: $1
  • To reference the second instruction: $2
  • To reference the third instruction: $3 etc… the number of instruction is not limited.


  • The first instruction rolls 8 (10 sided) dice
  • The second instruction counts how many dice are higher than 6.
  • The third instruction counts how many dice are equal to 1.
  • The fourth instruction substracts the result of the third instruction to the result of seconde one.

List of operator

  • k: Keep
  • K: Explode and keep
  • kl: Keep lower
  • s: Sort
  • c: Count
  • r: Reroll
  • R: Reroll until
  • e: Explode
  • a: Reroll and add
  • @: Backward Jump
  • p: Paint dice
  • m: Merge
  • i: if
  • ;: Next instruction
  • g: Group
  • b: bind
  • #: Comment



The option sorts the resulting die list and select the X higher dice.

Explode and Keep


Dice explode if their value are at the die maximum, the option sorts the resulting die list, the it selects the X higher dice.


6d10K4 Roll 6 10-sided dices, each 10 explodes. So the value of exploded dices are greater than 10. Result: 40 details: 23 [10,10,3],9,5,3,1,1

Another way to write this command is:

6d10e10k4 This way allows you to change the explode threshold.

Keep Lower dice


The option sorts the resulting die list, the it selects the X lowest dice.



The dice list is sorted in descending order.


Roll 6 dice at 6 faces and then sort them ascendingly



Count how many dice respect the condition and display the number (See Validator for more details about syntax)



Reroll the die if the previous value fits the validator (See Validator for more details about syntax).

Reroll until


Works like "Reroll", but continue to roll the dice until the condition is false.



Explode while the value fits the Validator (See Validator for more details about syntax).


3D10e10 While dice value is equal to 10, the dice is rolled again and its result is added to the previous dice value. Result: 49 details: 8, 12 [10,2], 29 [10,10,9]

3D10e[>8] While the dice value is greater than 8, the dice is rolled again and its result is added to the previous dice value. Result: 35 details: 3, 27 [9,10,8], 5



Reroll the die if its value fits the Validator and add the new value to the previous one. It does that only once.

Backward Jump

This operator is dedicated to apply its next operator to the second to last result. For example:


c[=10] in this command is counting the number of 10 in the result of 8D10, if you remove the @, it will try to count the number of 10 in the result of c[>=7]. The result of c[>=7] is a scalar number (1 or 2 ... (max value 8)); it is not dice list.



Paint the first die in the list in blue


Paint the two first dice in the list in blue.

The amount of color is depending of client application of DiceParser.

  • With Rolisteam, you may set any Qt color's name or set the Hexcode of your color: #ff28AC.
  • The cli application supports few colors: black, white, blue, red, black, green, yellow.


Merge operator is used for gathering several dice rolls from different die type into one dice result and then you may apply any kind of operator.


This command merges together the result from the d6 and the d8. Then, it applied the k operator on both result to keep the best. Be careful, this operator merges the instruction list. Instruction reference (such as $1 etc..) won't work after merge operator.


It makes exploded dice as new dice.


Result: 6 4 3 3 2 Final result: 6+4+3 = 13


Bind works exactly as merge but one thing.

!2d8;2d12b;$2k2;$2k2kl1;"your total is $3 with lowest: $4"

Roll two 8-sided dice and two 12-sided dice then bind their results. using this final result, we keep the 2 higher dice and then we isolate the lowest of the two highest. At the end, we display the result inside a setence.


If operator means to allow you to do one thing if some conditions are true. The if operator has 2 mandatory parameters:

  • The condition (see validator)
  • the instruction to do when it is true.

There is also 2 optional parameters

  • the compare method
  • the instruction to do when it is false.


  • *: the compare method
  • []: the validator
  • {}: the true instruction
  • {}: the false instruction

Compare method

There are 3 different methods.

  • On Each (default): the condition is tested on each die from the previous part of the command. [Default method]
  • All Of Them (*): All dice must fit the condition to trigger the true instruction. If all dice do not fit the condition the false instruction is run.
  • One Of Them (.): at least one die must fit the condition to trigger the true instruction. If no dices fit the condition the false instruction is run.
  • On Scalar (:): the condition is evaluated on the scalar result of the dice roll.



If the value of the die is less than 4, the die value is 3. (So 1, 2 , 3 become 3).


If die has 4 as value, it remove it. [Kuro System]


if at least one die is equal to 6, then roll another d6 and add it to the result.


if all dice are equal to 6, then roll another d6 and add it to the result.


if the sum of two dice is greater than 15, It displays "Success", otherwise it displays "Fail".

2d10i:[>15]{"Success %1 "}{"Fail %1"}

Same as above, but the final result is displayed beside Success or Fail.

2d10i:[>15]{"Success %1 [%2]"}{"Fail %1 [%2]"}

Same as above, but the result of each die is displayed inside square brackets.

String Result

To improve readability, it is possible to set the text that should be displayed after the roll.

Several data can be displayed:

  • %1: last scalar result from each instruction.
  • %2: all dice results
  • %3: last scalar result from the last instruction.

The default output is %1 details[%2]. So, it shows the last scalar result of each instruction and dice result.

%1 and %3 are equivalent when there is only one instruction (no ;).

Specific value from instrustion

It is also possible to set reference to the scalar result of specific instruction.

  • To reference the first instruction: $1
  • To reference the second instruction: $2
  • To reference the third instruction: $3 etc… The number of instruction is not limited.



The default output displays: 45,4,0,4 details[4,3,10,7,2,2,7,10]

8d10;$1c[>6];$1c1;$2-$3i:[>0]{"%3 Success[%2]"}{i:[<0]{"Critical fail %3 [%2]"}{"Fail %3 [%2]"}}"

The output is now: 4 Success[4,3,10,7,2,2,7,10] or Fail 0 [10,3,1,1,2,2,7,5] (2 success - 2 fails = 0) or Critical fail -2 [1,3,1,1,2,2,7,5] (1 success - 3 fails = -2)

In this example, the critical fail happens when there are more fails than success.

In the next example, the critical fail happens when there was no success and a least one fail.

8d10;$1c[>6];$1c1;$2-$3;$4i:[=0]{"Fail $4 [%2]"}{$4i:[>0]{"$2 Success[%2]"}{$2i:[=0]{"Critical Fail $4 [%2]"}{"Fail $4 [%2]"}}}


Group dices, then count the number of group (7th sea system).



This will roll 3 dices and then try to group them to make groups of 10. If you get 9 9 2, you can only create one group whose value is more or equal to ten ({9,2}, the second 9 being "wasted").

The g operator is allowed to re-order dices to create groups. When rolling 4d20g10, if you get 7 4 3 6, the result will be 2 ({7,3} and {6,4}).

Comment (#)

2D6 # Sword attack

Display "Sword attack" and the result of the two dice. DiceParser ignore everything after the #. The whole part is treated as one comment. So DiceParser can answer question:

1L[yes,no] # Am I evil ?

Am I evil ?


Rolisteam Dice Parser is able to compute primary arithmetic operation such as: +, -, /, * and it also manages those operator priority and it can also manage parenthesis.


Result: 24


Result: 20


Result: 14


Result: 3.5


Roll 2 dice and add 3 to the sum of those dice. Then the result is used for rolling dice.

Arithmetic and Dice

It is possible to use arithmetic opearation on dice. Please pay attention that the default operation to translate a dice list to scalar is the sum. So if you roll 3d6, the result will be a list with 3 values {2, 5 ,1}. Now, we change a bit the command 3d6+4: It is resolved like this: {2, 5 ,1} = 8; 8+4 = 12. The final result is 12.


Roll 3 dice; sum the result; and add 4


Roll 10 dice; sum the result; and then substract 2


Substract the result of 1 die to 87


Substract 4 to 6 and then roll two dice.


Divide by 2 the result of 1 die.

(2+2)^2 Result: 16



There are three kind of Validator:

  • Scalar
  • Range
  • Boolean expression

Any operator which requires validator (such as a,r,e,c) can use those three kind.


The scalar value sets the validator on eguality between the dice value and the validator


This command means: roll 4 dice and they explode on 10.


The range is defined as two bounds. You have to use square brackets and the two bounds are separated by -.


Boolean Condition

The command counts how many dice have values between >=8 and <=10.


The command counts how many dice are aboved 7.

Logic Operator

The Rolisteam Dice Parser allows you to use several logic operator:

  • Egual: =
  • Greater or egual: >=
  • Lesser or egual: <=
  • Lesser: <
  • Greater: >

Select value from List

The L operator (meaning list) can offer you the opportunity to pick up value from list.


With comment

1L[yes,no] # Am I evil ?

Am I evil ?



Roll 3 dice with 100 faces


Roll 10 dice with 10 faces, 10 explodes, and sort the result.


Roll 100291 dice with 66666666666 faces and sort result


roll 15 dice with 10 faces and it counts number of dice which are above 7


roll 1 die with 8 faces and add the result to 2 dice with 6 faces and add 7.


roll 1 die with 25 faces


88 minus the value of 1 die of 20 faces


compute: 24


One of this word will be picked.


Roll 8 dice with 10 faces then it counts how many dice respect the condition Validator1 and substract the number of dice which respect the validator2 and display the number (See Validator for more details about syntax)


Old World in darkness system.


Exalted 2nd edition system.

Best Practices

As DiceParser provides more and more features, you may find several ways to do the same thing. We want here to explain the difference between those several approaches. Then you will be able to use the right one.

Roll several kind of dice and sum them





The merge operator is useful when you want to use dice operator on all rolled dice.

Plateform specific documentation

Roll dice on each platform

Please, remember it is important to prefix all you command by !. This will allow the system to identify your command. To clarify the documentation, the ! is not repeated before all commands.

platform start character(s) more information
Rolisteam ! Documentation
Discord ! To install DiceParser on your server
Twitter #roll Twit any message starting with #roll following by dice command (e.g: #roll 2d6)
IrcBot !
webserver nothing No public published yet. Has dedicated text field
dice nothing dice is a command line application to roll dice: dice "2d6"

Known Limitations

platform descriptions
Rolisteam no support for comments yet. Rolisteam is a big software. You may not have all the most recent feature from diceparser.
Discord If the command takes too much time. It is canceled
Twitter Result such be short. No aliases
IrcBot No aliases
webserver No aliases
dice No aliases

We can't set some aliases for any platform but It has to be labelled with game's name.

Discord Bot

To change the prefix

!prefix set newprefix

/!\ Please, don't set "newprefix" as your new prefix.

Set the prefix by default

newprefixprefix set !


!prefix set roll

roll 2d6

rollprefix set !

Bug report and new features

Please fulfill a ticket in our Bug tracker system. Or contact us on discord or any other ways