The second project involves writing the syntactic analyzer for the compiler that was begun in the previous project. The grammar of the language is the following:
program:
{function}
function:
FUNCTION IDENTIFIER [parameters] RETURNS type; body
parameters:
parameter{, parameter}
parameter:
IDENTIFIER: type
type:
INTEGER |REAL |BOOLEAN
body:
{variable}BEGIN statementEND;
variable:
IDENTIFIER:typeISstatement
statement:
expression ; |
IF expression THEN statement ELSE statement ENDIF ;
expression:
IDENTIFIER |
IDENTIFIER (expression{, expression}) |
INT_LITERAL | REAL_LITERAL | BOOLEAN_LITERAL
expression operator expression |
(expression)
operator: ADDOP | MULOP | RELOP | AND | OR | NOT
In the above grammar, the red symbols are nonterminals, the blue symbols are terminals and the black punctuation are EBNF metasymbols. The braces denote repetition 0 or more times and the brackets denote optional.
The grammar must be rewritten to eliminate the EBNF brace and bracket metasymbols and to incorporate the significance of parentheses, operator precedence and left associativity for all operators. Among arithmetic operators the multiplying operators have higher precedence than the adding operators. All relational operators have the same precedence. Among the binary logical operators,and has higher precedence thanor. Of the categories of operators, the unary logical operator has highest precedence, the arithmetic operators have next highest precedence, followed by the relational operators and finally the binary logical operators.The directives to specify precedence and associativity, such as%prec and%left, may not be used
The syntactic analyzer should be created using bison. It should detect and recover from syntax errors to the extent possible. The semicolon should be used as the primary synchronization token. The compiler should produce a listing of the program with error messages included after the line in which they occur. A count of the number of lexical and syntactic errors and the number of total errors should follow the compilation listing.
Your parser should, however, be able to correctly parse any syntactically correct program without any problem.
You will lose points from the design portion of your grade if your bison input produces any shift/reduce or reduce/reduce errors.
The 70 points that you will receive for the functionality portion of your grade on this project will be based two criteria shown below:
|
Parses all syntactically correct programs |
40 points |
|
Detects and recovers from errors in the function header |
5 points |
|
Detects and recovers from errors in variable declarations |
5 points |
|
Detects and recovers from errors in conditional expressions |
5 points |
|
Detects and recovers from errors in arithmetic expressions |
5 poinst |
|
Detects and recovers from errors in the function body |
5 points |
|
Detects and recovers from multiple errors |
5 points
|
Try it now!
How it works?
Follow these simple steps to get your paper done
Place your order
Fill in the order form and provide all details of your assignment.
Proceed with the payment
Choose the payment system that suits you most.
Receive the final file
Once your paper is ready, we will email it to you.
Our Services
Custom Writings Help is a Quality-Oriented Company in Online Writing as a result of hiring exceptional professionals to execute clients' tasks.
Essays
At Custom Writings Help,We understand the struggle of research paper writing, and that is why at Custom WritingS Help, we are all out to help you. We pride ourselves on having a team of clinical writers. The stringent and rigorous vetting process ensures that only the 'BEST' Writers are chosen for the job. We have highly qualified Ph.D. and MA writers working with us; we equally offer these experienced writers specific bonuses and incentives to make them deliver highly original, unique, and informative content at reasonably low prices.
Admissions
Thesis Writing Service
Worlwide, Many Masters Students are struggling with Thesis Completion. A thesis is likely to be the longest and most challenging piece of work a student has ever completed. However, unlike essays and other assignments, a student can pick a particular interest topic and work on their initiative. Fortunately, we are there for you. At Custom Writings Help, you are assured of an authentic, imaginative, informative, linguistically great, and advantageous thesis that adheres to all your needs. So, why continue considering different writers when you have discovered the best in the field?
Editing
Custom Papers
Not a single student can avoid writing custom papers. However, a total lack of experience, skills, and time makes it very hard to produce a superb writing piece. Therefore, if you are seeking professional help, turn to us. Our specialized and experienced writers compose a variety of model papers, including custom essays, college term papers, research papers, book reports, MBA essays, executive summaries, dissertations, Ph.D. theses, admission essays, and research proposals for college and university students at any level.
Coursework
Essay Writing
Most of the students disregard the critical principles of essay writing and compose papers below sensible guidelines. Therefore, with Custom Writings Help, one should not worry about his/her essay. Our Writers compose informative and engaging content on all complexities and topics. We write meaningful and smart essays while prioritizing all aspects that bring about a good grade, such as impeccable grammar, proper structure, zero-plagiarism, and conformance to guidelines.
Coursework
Coourse Work Writing
Don't let the seemingly never-ending onslaught of writing assignments get you down. If you are looking where to get course work assistance online, the writers at Custom Writings Help are here to assist you with all of your writing needs. We undertake to unique delivery of papers that meet the professor's requirements. The content is proofread, edited, and checked plagiarism before submission to customers. No matter how big or small your work is, we will deliver on time. Try US Now! !
Coursework
Dissertation Writing Service
High-Quality Dissertation Writing Services are rare. They require Ph.D. academicians – not easily found. However, are an exception. The years, time, and resources we have invested in the dissertation world has given us a competitive advantage over others. Choose to come to Custom Writings Help; You will find perfect Ph.D. consultants who have written hundreds of dissertations theses ready to help you. Let our dissertation-writing services help you craft your dissertation, for you are assured we will give you the results.