.
Furthermore, what is the role of lexical analyzer?
Role of Lexical Analyzer Lexical analyzer performs the following tasks: Reads the source program, scans the input characters, group them into lexemes and produce the token as output. Scanning: Performs reading of input characters, removal of white spaces and comments. Lexical Analysis: Produce tokens as the output.
Secondly, which compiler is used for lexical analysis? JavaCC is the standard Java compiler-compiler. Unlike the other tools presented in this chapter, JavaCC is a parser and a scanner (lexer) generator in one. JavaCC takes just one input file (called the grammar file), which is then used to create both classes for lexical analysis, as well as for the parser.
In this regard, what is the output of lexical analyzer?
(I) The output of a lexical analyzer is tokens. (II) Total number of tokens in printf("i=%d, &i=%x", i, &i); are 10. (III) Symbol table can be implementation by using array, hash table, tree and linked lists.
What are the issues in lexical analysis?
Issues in Lexical Analysis 1) Simpler design is the most important consideration. The separation of lexical analysis from syntax analysis often allows us to simplify one or the other of these phases. 2) Compiler efficiency is improved. 3) Compiler portability is enhanced.
How is lexical analyzer implemented?
- Lexical analyzer first read int and finds it to be valid and accepts as token.
- max is read by it and found to be valid function name after reading (
- int is also a token , then again i as another token and finally ;
What are the features of lexical analyzer?
- Helps to identify token into the symbol table.
- Removes white spaces and comments from the source program.
- Correlates error messages with the source program.
- Helps you to expands the macros if it is found in the source program.
- Read input characters from the source program.
