Generating a parser for a customized (imaginary) programming language, I have made a grammar for that customized programming language and checked that with right and wrong input code.

Terminal and non-terminal symbols are the lexical parts used in deciding the creation rules setting up a customary programming language. Terminal symbols are simple symbols described by an ordinary programming language. Grammar is not just used to portray the formulation of a programming language, it is furthermore used to compiler forming.

Description:

1. Semicolon is mandatory to indicate the end of a line. Every expression should be in a particular block. Each block starts with opening curly-brace and ends with closing curly-brace.

2. The Operators are:

   • binary operator: =, +, -, *, /, +=, -=, *=, /=, %=

   • logical operator: &&,||,!, AND, OR, NOT

   • relational operator: ==, !=, <, >, <=, >=

   • increment operator: ++

   • decrement operator: --

3. Language begins with one or more header files with keyword include. There are at least one or more header files can be exist.

   

4. Many or no macros can exist in the program. If macros exist, it will begins with keyword define

   

5. Program execution starts in the main function.

   

6. We have various types of type specifiers in this language:

   • Integer, Float, Double, bool, String

7. Without specifying type, User are also allowed to declare constant & variable. But before declaring a constant, user need to write the keyword constant.

   

8. User can take input as given below.

   

9. Using print command, user can print.

   

10. Function can be called also according to below syntax.

    

11. We can also add additional functions. Function parameters are optional to use. Function can be called recursively.

    

    

12. User can write conditional statement with if, else if & else. There could be multiple else if and an optional else.

    

    

13. User can run two types of loop, for and while with break and continue statement.