src/log_surgeon/finite_automata/RegexDFAState.hpp (1)

35-35: Pass small integral type uint8_t by value instead of by const reference

The parameter byte in add_byte_transition is a uint8_t, which is more efficiently passed by value rather than by const reference. Passing small integral types by value avoids unnecessary indirection.

Apply this diff to pass byte by value:

-auto add_byte_transition(uint8_t const& byte, RegexDFAState<stateType>* dest_state) -> void {
+auto add_byte_transition(uint8_t byte, RegexDFAState<stateType>* dest_state) -> void {

src/log_surgeon/finite_automata/RegexDFA.hpp (1)

65-65: Use idiomatic condition in the while loop

Consider using !unvisited_pairs.empty() instead of false == unvisited_pairs.empty() for better readability and to align with common coding practices.

Apply this diff:

-    while (false == unvisited_pairs.empty()) {
+    while (!unvisited_pairs.empty()) {

src/log_surgeon/finite_automata/RegexDFAStatePair.hpp (1)

70-80: Offer assistance to implement UTF-8 transitions

The method get_reachable_pairs currently handles only single-byte transitions, as indicated by the TODO comment. Supporting UTF-8 (multi-byte) transitions is essential for full Unicode compatibility.

I can help implement support for UTF-8 transitions in this method. Would you like me to provide a solution or open a GitHub issue to track this enhancement?

Configuration used: CodeRabbit UI
Review profile: CHILL

Learnt from: SharafMohamed
PR: y-scope/log-surgeon#42
File: src/log_surgeon/finite_automata/RegexNFA.hpp:37-90
Timestamp: 2024-11-10T16:46:58.543Z
Learning: In this codebase, prefer code clarity over efficiency optimizations unless efficiency is a critical concern.

Learnt from: SharafMohamed
PR: y-scope/log-surgeon#47
File: src/log_surgeon/finite_automata/RegexNFAState.hpp:127-128
Timestamp: 2024-11-10T16:46:58.543Z
Learning: `RegexNFAUTF8State` is defined as a type alias for `RegexNFAState<RegexNFAStateType::UTF8>`.

Learnt from: SharafMohamed
PR: y-scope/log-surgeon#48
File: src/log_surgeon/finite_automata/RegexNFAState.hpp:0-0
Timestamp: 2024-11-13T20:02:13.737Z
Learning: In `src/log_surgeon/finite_automata/RegexNFAState.hpp`, the constructor `RegexNFAState(std::set<Tag const*> tags, RegexNFAState const* dest_state)` has been updated to use `std::vector<Tag const*> tags` instead of `std::set`.

Learnt from: SharafMohamed
PR: y-scope/log-surgeon#42
File: src/log_surgeon/finite_automata/RegexNFA.hpp:37-90
Timestamp: 2024-11-10T16:46:58.543Z
Learning: In this codebase, prefer code clarity over efficiency optimizations unless efficiency is a critical concern.

Learnt from: SharafMohamed
PR: y-scope/log-surgeon#47
File: src/log_surgeon/finite_automata/RegexNFAState.hpp:127-128
Timestamp: 2024-11-10T16:46:58.543Z
Learning: `RegexNFAUTF8State` is defined as a type alias for `RegexNFAState<RegexNFAStateType::UTF8>`.

src/log_surgeon/finite_automata/RegexDFA.hpp (2)

12-14: Consider addressing the TODO comment in this PR

The TODO suggests renaming RegexDFA to DFA. Since this PR is already refactoring the DFA-related code, it might be a good opportunity to implement this naming change as well.

Would you like me to help with renaming the class and updating all its references?

---

60-60: Track the UTF-8 handling requirement

The TODO comment indicates missing functionality for handling UTF-8 multi-byte transitions.

Would you like me to create a GitHub issue to track the UTF-8 handling requirement?

Configuration used: CodeRabbit UI
Review profile: CHILL

Learnt from: SharafMohamed
PR: y-scope/log-surgeon#48
File: src/log_surgeon/finite_automata/RegexNFAState.hpp:0-0
Timestamp: 2024-11-13T20:02:13.737Z
Learning: In `src/log_surgeon/finite_automata/RegexNFAState.hpp`, the constructor `RegexNFAState(std::set<Tag const*> tags, RegexNFAState const* dest_state)` has been updated to use `std::vector<Tag const*> tags` instead of `std::set`.

src/log_surgeon/finite_automata/RegexDFAState.hpp (1)

55-55: Optimise memory usage by conditionally including m_bytes_transition

The member m_bytes_transition is always included in RegexDFAState, even when stateType is UTF8, which can lead to unnecessary memory usage. Consider conditionally including m_bytes_transition only when stateType is Byte, similar to how m_tree_transitions is conditionally included.

src/log_surgeon/finite_automata/RegexDFAStatePair.hpp (1)

71-71: Implement UTF-8 handling in get_reachable_pairs

There is a TODO comment indicating that UTF-8 (multi-byte transitions) are not yet handled in the get_reachable_pairs method. Implementing this functionality is important for full UTF-8 support. Would you like assistance in adding this implementation?

Configuration used: CodeRabbit UI
Review profile: CHILL

Learnt from: SharafMohamed
PR: y-scope/log-surgeon#47
File: src/log_surgeon/finite_automata/RegexNFAState.hpp:127-128
Timestamp: 2024-11-10T16:46:58.543Z
Learning: `RegexNFAUTF8State` is defined as a type alias for `RegexNFAState<RegexNFAStateType::UTF8>`.

Learnt from: SharafMohamed
PR: y-scope/log-surgeon#48
File: src/log_surgeon/finite_automata/RegexNFAState.hpp:0-0
Timestamp: 2024-11-13T20:02:13.737Z
Learning: In `src/log_surgeon/finite_automata/RegexNFAState.hpp`, the constructor `RegexNFAState(std::set<Tag const*> tags, RegexNFAState const* dest_state)` has been updated to use `std::vector<Tag const*> tags` instead of `std::set`.

 if constexpr (RegexDFAStateType::Byte == stateType) {
+    assert(character < cSizeOfByte);
     return m_bytes_transition[character];
 }