[Verse 1]
Source code flows like water through the gates
Regular expressions catch each token's traits
From regex patterns to machines that never fail
Finite states guide us down the parsing trail
[Chorus]
Regex to NFA, NFA to DFA
Scanner reads the symbols, lexical display
Context-free grammars build the syntax tree
LL and LR parsers set the structure free
Automata dancing, compilers come alive
Theory meets practice, watch your code survive
[Verse 2]
Nondeterministic paths explore each choice
Epsilon transitions speak without a voice
Subset construction makes determinism clear
One state at a time, no ambiguity here
[Chorus]
Regex to NFA, NFA to DFA
Scanner reads the symbols, lexical display
Context-free grammars build the syntax tree
LL and LR parsers set the structure free
Automata dancing, compilers come alive
Theory meets practice, watch your code survive
[Bridge]
Attribute grammars carry meaning down
Synthesized values, inherited crown
Type checking guards against the programmer's slip
Semantic analysis, the compiler's grip
[Verse 3]
Left-to-right scanning, leftmost derivation
LL parsers predict with no hesitation
LR shifts and reduces, bottom-up ascent
Parse tables guide where every symbol's sent
[Chorus]
Regex to NFA, NFA to DFA
Scanner reads the symbols, lexical display
Context-free grammars build the syntax tree
LL and LR parsers set the structure free
Automata dancing, compilers come alive
Theory meets practice, watch your code survive
[Outro]
From tokens to semantics, the pipeline flows
Each automaton knows exactly where it goes
Compilation's magic, theory made real
Finite state machines with algorithmic steel