This is a compiler writen in python.
lexer is a Lexical analysis program.
Before generate ASTTree, codes must be separated in diffrent tokens.
lexer contains,
- define token regex/priority/type
- parse code in tokens
parser is parse tokens and gennerate AST-Tree program.
With tokens of codes, generate a tree node by a token or some tokens, then calcuate value of every node to calcuate the answer.
parser contains,
- generate AST-Tree
- parse operator tokens
- parse scope tokens
- calcuate value of every AST-Tree