The presentation covers ANTLR and its testing. In the presentation we will discuss what is grammar and how its been parsed into its corresponding parse tree. Then we will focus on the stages of the process of parsing. We will then understand what is ANTLR and will see some of the companies exploring features of ANTLR. Towards the end of the discussion we discuss how to test weather an input string is correct with respect to a grammar or not using TestRig along with the demonstration.
You may refer following blog:
https://blog.knoldus.com/2016/04/29/testing-grammar-using-antlr4-testrig-grun/
Using ANTLR on real example - convert "string combined" queries into paramete...Alexey Diyan
1. Hello ANTLR: ANother Tool for Language Recognition
2. Where we can use ANTLR?
3. Why just not use regular expression language?
4. Tools under ANTLR umbrella
5. ANTLR basic syntax
6. ANTLR on real example
The presentation covers ANTLR and its testing. In the presentation we will discuss what is grammar and how its been parsed into its corresponding parse tree. Then we will focus on the stages of the process of parsing. We will then understand what is ANTLR and will see some of the companies exploring features of ANTLR. Towards the end of the discussion we discuss how to test weather an input string is correct with respect to a grammar or not using TestRig along with the demonstration.
You may refer following blog:
https://blog.knoldus.com/2016/04/29/testing-grammar-using-antlr4-testrig-grun/
Using ANTLR on real example - convert "string combined" queries into paramete...Alexey Diyan
1. Hello ANTLR: ANother Tool for Language Recognition
2. Where we can use ANTLR?
3. Why just not use regular expression language?
4. Tools under ANTLR umbrella
5. ANTLR basic syntax
6. ANTLR on real example
This course is a complete package that helped me to learn Python Programming from basic to an intermediate level. The course curriculum has been divided into 4 weeks where we can practice questions & attempt the assessment tests according to your own pace. The course offers us a wealth of programming challenges that will help you to prepare for interviews with top-notch companies like Microsoft, Amazon, Adobe etc
This presentation educates you about Python syntax, Python Identifiers, Naming conventions for Python identifiers, Reserved Words, Lines and Indentation, Multi-Line Statements, Quotation in Python, Comments in Python, Multiple Statements on a Single Line and Multiple Statement Groups as Suites.
For more topics stay tuned with Learnbay.
This course is a complete package that helped me to learn Python Programming from basic to an intermediate level. The course curriculum has been divided into 4 weeks where we can practice questions & attempt the assessment tests according to your own pace. The course offers us a wealth of programming challenges that will help you to prepare for interviews with top-notch companies like Microsoft, Amazon, Adobe etc
This presentation educates you about Python syntax, Python Identifiers, Naming conventions for Python identifiers, Reserved Words, Lines and Indentation, Multi-Line Statements, Quotation in Python, Comments in Python, Multiple Statements on a Single Line and Multiple Statement Groups as Suites.
For more topics stay tuned with Learnbay.
Principles of compiler design ppt on regular expression . Conversion regular expression to dfa and dfa to nfa. Direct method for converting regular expression to dfa
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The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
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This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
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for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
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Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
2. Lexical Analyzer
• Specifications of Tokens
• Let us understand how the language theory undertakes the following terms:
• Alphabets
• Any finite set of symbols {0,1} is a set of binary alphabets,
{0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F} is a set of Hexadecimal alphabets, {a-z, A-Z} is
a set of English language alphabets.
• Strings
• Any finite sequence of alphabets is called a string. Length of the string is the
total number of occurrence of alphabets, e.g., the length of the string Noor is
4 and is denoted by |Noor| = 4.
• A string having no alphabets, i.e. a string of zero length is known as an empty
string and is denoted by ε (epsilon).
4. Lexical Analyzer
• Language
• A language is considered as a finite set of strings over some finite set of
alphabets.
• Computer languages are considered as finite sets, and mathematically set
operations can be performed on them.
• Finite languages can be described by means of regular expressions.
• Longest Match Rule
• When the lexical analyzer read the source-code, it scans the code letter by
letter; and when it encounters a whitespace, operator symbol, or special
symbols, it decides that a word is completed.
5. Lexical Analyzer
• Input Buffering
• The lexical analyzer scans the input from left to right one character at a time.
It uses two pointers begin ptr(bp) and forward to keep track of the pointer of
the input scanned.
6. Lexical Analyzer
• Input Buffering
• Initially both the pointers point to the first character of the input string as
shown below:
7. Lexical Analyzer
• The forward ptr moves ahead to search for end of lexeme.
• As soon as the blank space is encountered, it indicates
end of lexeme.
• In above example as soon as ptr (fp) encounters a blank
space the lexeme “int” is identified.
• The fp will be moved ahead at white space, when fp
encounters white space, it ignore and moves ahead. then
both the begin ptr(bp) and forward ptr(fp) are set at next
token.