Doppl is a new programming language that aims providing a natural syntax for implementing parallel algorithms, designing data structures for shared memory applications and automated message passing among multiple tasks. The name is an abbreviation of `data oriented parallel programming language`.

1. DOPPL
Data Oriented Parallel Programming Language
Development Diary
Iteration #6
Covered Concepts:
String Concatenation Operator
Diego PERINI
Department of Computer Engineering
Istanbul Technical University, Turkey
2013-08-09
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2. Abstract
This paper stands for Doppl language development iteration #6. In this paper, string
concatenation operator will be introduced.
1. Rationale
As a high level language, Doppl characters are also strings therefore there is no distinction
between string concatenation and character appending.
2. String Concatenation Operator
keyword
meaning
++
string concatenation
++ operator can concatenate any string literal with any initialized string as well as can be used
to chain multiple concatenations. Null literal is not considered as a valid string therefore cannot be
concatenated. Below is an example source code.
#String Concatenation
task(1) Strings {
data a_string = string
#Examples
init: {
a_string = "Hello"
a_string = a_string ++ " World" ++ "!"
}
}
3. Conclusion
Iteration #6 introduces string concatenation operator and stresses the fact that there is no
distinction between a character and a string in terms of Doppl types.
4. Future Concepts
Below are the concepts that are likely to be introduced in next iterations.
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Standard input and output
once access modifier
if conditional and trueness
State transition operators
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3. ●
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Primitive Collections and basic collection operators
Provision operators
Tasks as members
Task and data traits
Custom data types and defining traits
Built-in traits for primitive data types
Message passing
Exception states
5. License
CC BY-SA 3.0
http://creativecommons.org/licenses/by-sa/3.0/
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