It involves converting intermediate representation in the executing program. This phase performs semantic checks such as type checking (checking for type errors),or object binding (associating variable and function references with their definitions),or definite assignment (requiring all local variables to be initialized before use),rejecting incorrect programs or issuing warnings.Ī synthesis requiresmore specialized methods.
What is assembler in compiler design software#
This phase is also called lexing or scanning,and the software doing lexical analysis is called a lexical analyzer or scanner. The token syntax is typically a regular language,so a finite state automaton constructed from a regular expression can be used to recognize it. Each token is a single atomic unit of the language,for instance a keyword,identifier or symbol name.