Harnessing automated program synthesis allows non-programmers to create working code
Nobody said computer programming was easy. But maybe in the future, it could be.
In order to simplify program development, a National Science Foundation (NSF)-supported project called Expeditions in Computer Augmented Program Engineering (ExCAPE), is developing technology that provides human operators with automated assistance.
"Computers have revolutionized our daily lives, and yet the way we program computers has changed little in the last several decades," said Rajeev Alur, a professor in the department of computer and information science at the University of Pennsylvania.
Alur heads a team of researchers -- representing nine leading computer science programs in the U.S. -- that collaborates on the ExCAPE project. NSF supports ExCAPE with a $10 million, five-year Expeditions in Computing award, which funds interdisciplinary research teams working to transform computing and technology.
Alur said the team is taking on a longstanding problem: "Software development remains a tedious and error-prone activity."
Using a model of programming called automated program synthesis, however, computers can generate pieces of code based on a user's intent, expressed using various non-code-based forms, such as examples, demonstrations or natural language commands.
"ExCAPE aims to change programming from a purely manual task to one in which a programmer and an automated program synthesis tool can collaborate to generate software that meets its specification," Alur said.
By removing the need for would-be programmers to learn esoteric programming languages, the method has the potential to significantly expand the number of people engaged in programming in a variety of disciplines, from personalized education to robotics.
Emerging technology known as Software-Defined Networks (SDN) allows network operators to tailor a computer network to the traffic running on it, thereby improving efficiency. Most network operators, however, are not traditional programmers and, as a result, cannot take full advantage of all the technology offers.
To address this shortcoming, the ExCAPE team developed a tool called NetEgg that lets a network operator specify the desired functionality of a switch using examples. NetEgg then automatically generates the code needed to implement that behavior while ensuring maximal throughput for network traffic.
Now patented, NetEgg has already been tested in a classroom setting and forms the basis of an NSF I-Corps project, which will explore the product's transition to commercial deployment.
Computer-aided education and beyond
Looking at the growing area of online learning, the ExCAPE team further recognized the role that program synthesis tools could play in generating automatic feedback for students -- analyzing their solutions, grading their assignments, and providing meaningful explanations of their mistakes.
That's why the team created Automata Tutor, which has been used by more than 5,000 students from more than 10 universities around the world. Alur and his colleagues presented the results from the early deployment of Automata Tutor in ACM Transactions on Computer-Human Interaction and at the International Joint Conference on Artificial Intelligence.
The group has created other tools, including AutoProf, which provides feedback on introductory programming assignments in computer languages, such as Python. Another tool, CPSgrader, automatically grades laboratory courses in cyber-physical systems and provides feedback.
More broadly, the ExCAPE team was able to develop a method that formalized and standardized the core computational problem in emerging synthesis tools. Called Syntax-Guided Synthesis, the new method has allowed the team to build a number of prototype solvers over the past two years.
"This effort has been instrumental in advancing the state-of-the-art in computational approaches, and it has facilitated novel applications of program synthesis, for instance, in automatic optimization of programs for quantum computers," Alur said.
The ExCAPE team's research has affected the commercial software world, too. Its notion of syntax-guided synthesis inspired Microsoft to create automated program synthesizers for its suite of software.
"At Microsoft, we have invested significantly in the field of program synthesis, especially programming-by-examples, and with applications to end-user programming," said Sumit Gulwani, of Microsoft Research, USA.
Microsoft started out by developing domain-specific synthesizers such as FlashFill and FlashExtract, each of which uses examples to generate custom code that improves efficiency. FlashFill, which was released as a feature of Microsoft's Excel 2013, allows data entered into one column of a worksheet table to be entered in a new table column using only a few keystrokes. FlashExtract, which was included in Microsoft's PowerShell and Operations Management Suite, extracts structured data from semi-structured log files using examples.
The technology giant has also developed a generic programming-by-example synthesizer called FlashMeta.
"All of our ongoing development of by-example synthesizers at Microsoft for various domains is now being carried out over the FlashMeta framework," Gulwani said. "In fact, we have set up an entire research and engineering team for development of this framework, called PROSE. This has yielded one order of magnitude effectiveness in the overall development process."
In years to come, the process of using coding languages for programming may be seen as an evolutionary step in computing, just as other methods replaced the punch cards and assembly languages used to program early computers.
"This project builds on decades of foundational advances in formal methods and programming languages," says Nina Amla, program director in the Division of Computing and Communication Foundations at NSF. "It signals a paradigm shift in the way we teach basic programming principles, and develop reliable software systems."
Aaron Dubrow | EurekAlert!
Smarter robot vacuum cleaners for automated office cleaning
15.08.2017 | Fraunhofer-Institut für Arbeitswirtschaft und Organisation IAO
Researchers 3-D print first truly microfluidic 'lab on a chipl devices
15.08.2017 | Brigham Young University
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
Researchers from the University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science, the Italian Space Agency (ASI), and the Instituto Geofisico--Escuela Politecnica Nacional (IGEPN) of Ecuador, showed an increasing volcanic danger on Cotopaxi in Ecuador using a powerful technique known as Interferometric Synthetic Aperture Radar (InSAR).
The Andes region in which Cotopaxi volcano is located is known to contain some of the world's most serious volcanic hazard. A mid- to large-size eruption has...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
16.08.2017 | Physics and Astronomy
16.08.2017 | Materials Sciences
16.08.2017 | Interdisciplinary Research