VES++

The language for everybody, yet nobody

I love to learn new languages. My inspiration for this program language is therefore based on my hobby. VES++ has included the most common languages from west-europe (and for some random reason I have added the turkish language). This way many people are able to understand a part of the code, yet (probably) not everything. In my opinion it is a fun way to get involved with other languages!

Chosen extra features

• Error-messaging
• Advanced language features
• Creating my own language
• Instruction-and-show-off video

Translation table

Type	Word in this language	Language where it comes from
Plus operator	mas	Spanish
Minus operator	eksi	Turkish
Multiply operator	vezes	Portugese
Division operator	dela	Swedish
Assignment	er	Norwegian
If	ef	Icelandic
Else	annars	Icelandic
While	aika	Finnish
Equal operator	lig	Danish
Not equal operator	unterschiedlich	German
Terminate character (;)	fin	French
Left parenthesis	haakje_begin	Dutch
Right parenthesis	haakje_eind	Dutch
Left bracet	fa_inizio	Italian
Right bracet	fa_fine	Italian
Print statement	taispeain	Irish

Symbol table

Symbol	Usage
$	Line starting with '$' are comment lines
#	This character ends the print-statement
@	Every variable starts with an @
>	Greater than
>=	Greater than or equal to
<	Smaller than
<=	Smaller than or equal to

Use of operators

Math

<value> <math-keyword> <value>

Assigning variable

@<variable name> er <value/statement> fin

If-statement

ef haakje_begin <condition> haakje_eind fa_inizio
	<things you want to do>
fa_fine

While-loop

aika haakje_begin <condition> haakje_eind fa_inizio
	<things you want to do>
fa_fine

Printing

taispeain 
	<thing to print> fin
	<thing to print> fin
	... 
#

Error-messaging

Ves++ is included with errormessaging. When an error occurs, it shows the errormessage and the line the error has occurred on for debug purposes. An error will be given for the following issues:

• Unknown symbol, such as '=' '&' 'abcd'
• Syntax errors
• Undefined variables
• Assignment to a non-variable, such as: 8 er 5 mas 5 fin
• Division by zero

Advanced language features

• Calutations can be made with the plus-, min-, multiply- and divide operator. These calculations are according the math rules
• Print statement: you can print multiple variables or expressions
• Comment lines are integrated. Lines starting with '$' are comment lines

Used high order functions

The interpreter uses the following high order functions:

• Foldl
• Zip
• Filter
• Map

Inheritance

The interpreter has one inheritance, this is for the Node class. This class has two childs: operator_node and value_node

Examples

Below are examples shown of the VES++ code.

Printing statements

taispeain 
	2 mas 2 fin
	5 vezes 5 fin
#	

Result:

4.0
25.0

Math rules

taispeain 
	2 mas 2 vezes 5 eksi 4 fin
#

Result:

8

Assigning variables

$ @test is a variabele
@ATP er 30 fin
@test er @ATP fin
@ATP er 20 fin
taispeain
	@ATP fin
	@test fin
#

Result:

20.0
30.0

If-statement in If-statement

$if-statement in if statement
@vera er 21 fin
ef haakje_begin 2 < 3 haakje_eind fa_inizio
	ef haakje_begin @vera > 18 haakje_eind fa_inizio
		taispeain
			1 fin
		#
	fa_fine
	ef haakje_begin @vera <= 18 haakje_eind fa_inizio
		taispeain
			0 fin
		#
	fa_fine
fa_fine

Result: 1.0

If-statement in While-loop

$while and if
@ATP er 10 fin
@counter er 0 fin
aika haakje_begin @ATP > 0 haakje_eind fa_inizio
	@ATP er @ATP eksi 1 fin
	ef haakje_begin @ATP >= 5 haakje_eind fa_inizio
		@counter er @counter mas 1 fin
	fa_fine
fa_fine

taispeain
	@ATP fin
	@counter fin
#

Result:

0.0
5.0

Combining the statements in ves++

@ATP er 8 fin
@test er 0 fin
aika haakje_begin @ATP > 2 haakje_eind fa_inizio
	ef haakje_begin @ATP dela 2 lig 3 haakje_eind fa_inizio
		@test er @test mas 1 fin
	fa_fine
	@ATP er @ATP eksi 1 fin
fa_fine
ef haakje_begin @ATP > 0 haakje_eind fa_inizio
   @geslaagd er 1 fin
fa_fine

taispeain
	@ATP fin
	@test fin
	@geslaagd fin
#

Result:

2.0
1.0
1.0