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Add .clang-format and apply it

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This commit is contained in:
Matthew Gretton-Dann
2021-12-02 07:18:16 +00:00
parent e58dede1b6
commit cd5e2538df
103 changed files with 2714 additions and 2132 deletions
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172
2015/puzzle-07-02.cc
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@@ -24,22 +24,28 @@
// implementation)
// helper type for the visitor #4
template <class... Ts> struct Overloaded : Ts... { using Ts::operator()...; };
template<class... Ts>
struct Overloaded : Ts...
{
using Ts::operator()...;
};
// explicit deduction guide (not needed as of C++20)
template <class... Ts> Overloaded(Ts...) -> Overloaded<Ts...>;
template<class... Ts>
Overloaded(Ts...) -> Overloaded<Ts...>;
/// Instruction action
enum class Action {
Set, ///< Set value
And, ///< And two values
Or, ///< Or two values
LShift, ///< Left shift
RShift, ///< Right shift
Not ///< Bitwise not
Set, ///< Set value
And, ///< And two values
Or, ///< Or two values
LShift, ///< Left shift
RShift, ///< Right shift
Not ///< Bitwise not
};
/// Pretty-print action
std::ostream &operator<<(std::ostream &os, Action act) {
std::ostream& operator<<(std::ostream& os, Action act)
{
switch (act) {
case Action::Set:
os << "SET";
@@ -63,22 +69,24 @@ std::ostream &operator<<(std::ostream &os, Action act) {
return os;
}
using Value = std::uint16_t; ///< Value
using Wire = std::string; ///< Wire name (string)
using Signal = std::variant<Value, Wire>; ///< Either a wire or explicit value
using Value = std::uint16_t; ///< Value
using Wire = std::string; ///< Wire name (string)
using Signal = std::variant<Value, Wire>; ///< Either a wire or explicit value
/// Outputter for a signal
std::ostream &operator<<(std::ostream &os, Signal const &signal) {
std::ostream& operator<<(std::ostream& os, Signal const& signal)
{
return std::visit(
[&os](auto &&arg) -> std::ostream & {
os << arg;
return os;
},
signal);
[&os](auto&& arg) -> std::ostream& {
os << arg;
return os;
},
signal);
}
/** \brief An instruction. */
struct Instruction {
struct Instruction
{
/** \brief Construct an instruction.
*
* \subsection Grammar
@@ -92,7 +100,8 @@ struct Instruction {
* binop := signal op signal '->' wire
* instr := binop | not | set
*/
Instruction(std::string const &s) {
Instruction(std::string const& s)
{
if (parse_bin_op(s)) {
return;
}
@@ -110,20 +119,22 @@ struct Instruction {
Action action() const noexcept { return act_; }
/// Get the destination wire
Wire const &dest() const noexcept { return dest_; }
Wire const& dest() const noexcept { return dest_; }
/// Get the first (or only) source
Signal const &src1() const noexcept { return src1_; }
Signal const& src1() const noexcept { return src1_; }
/// Get the second source
Signal const &src2() const noexcept {
Signal const& src2() const noexcept
{
assert(act_ != Action::Set && act_ != Action::Not);
return src2_;
}
private:
/// Parse a <not> instruction. Return true if successful.
bool parse_not(std::string const &s) {
bool parse_not(std::string const& s)
{
if (s.substr(0, 4) == "NOT ") {
std::string::size_type pos = 4;
while (s[pos] == ' ') {
@@ -135,7 +146,8 @@ private:
}
/// Parse a <bin_op> instruction. Return true if successful.
bool parse_bin_op(std::string const &s) {
bool parse_bin_op(std::string const& s)
{
static const std::regex re("^([[:lower:][:digit:]]+) ([[:upper:]]+) "
"([[:lower:][:digit:]]+) -> ([[:lower:]]+)");
std::smatch m;
@@ -145,13 +157,17 @@ private:
if (m.str(2) == "AND") {
act_ = Action::And;
} else if (m.str(2) == "OR") {
}
else if (m.str(2) == "OR") {
act_ = Action::Or;
} else if (m.str(2) == "LSHIFT") {
}
else if (m.str(2) == "LSHIFT") {
act_ = Action::LShift;
} else if (m.str(2) == "RSHIFT") {
}
else if (m.str(2) == "RSHIFT") {
act_ = Action::RShift;
} else {
}
else {
return false;
}
dest_ = m.str(4);
@@ -165,7 +181,8 @@ private:
///
/// Also used for the latter half of <not> parsing. ACT tells you what is
/// being parsed. Returns true if parsing successful.
bool parse_set(std::string const &s, Action act = Action::Set) {
bool parse_set(std::string const& s, Action act = Action::Set)
{
static const std::regex re("^([[:lower:][:digit:]]+) -> ([[:lower:]]+)");
std::smatch m;
if (!std::regex_search(s, m, re)) {
@@ -179,23 +196,26 @@ private:
}
/// Make a Signal from a string.
Signal make_signal(std::string const &s) {
Signal make_signal(std::string const& s)
{
if (std::isdigit(s[0])) {
auto u = std::stoul(s, nullptr, 10);
assert(u <= UINT16_MAX);
return Signal(static_cast<std::uint16_t>(u));
} else {
}
else {
return Signal(s);
}
}
Action act_; ///< Action
Wire dest_; ///< Destination wire
Signal src1_, src2_; ///< Source signals
Action act_; ///< Action
Wire dest_; ///< Destination wire
Signal src1_, src2_; ///< Source signals
};
/// Outputter for an instruction.
std::ostream &operator<<(std::ostream &os, Instruction const &instr) {
std::ostream& operator<<(std::ostream& os, Instruction const& instr)
{
os << instr.action() << " " << instr.dest() << ", " << instr.src1();
if (instr.action() != Action::Set && instr.action() != Action::Not) {
os << ", " << instr.src2();
@@ -204,56 +224,58 @@ std::ostream &operator<<(std::ostream &os, Instruction const &instr) {
}
/// Ma
using ValueMap = std::map<Wire, Value>; ///< Map wires to values
using Instructions = std::vector<Instruction>; ///< Instructions to execute
using ValueMap = std::map<Wire, Value>; ///< Map wires to values
using Instructions = std::vector<Instruction>; ///< Instructions to execute
struct VM {
struct VM
{
/// Add an instruction the the list we have
void add_instr(Instruction const &instr) { instrs_.push_back(instr); }
void add_instr(Instruction const& instr) { instrs_.push_back(instr); }
/// Has this wire a known value?
bool has_value(Wire const &w) const noexcept {
return values_.find(w) != values_.end();
}
bool has_value(Wire const& w) const noexcept { return values_.find(w) != values_.end(); }
/// Has this signal a known value?
bool has_value(Signal const &s) const noexcept {
return std::visit(Overloaded{[](Value v) { return true; },
[&](Wire const &w) { return has_value(w); }},
s);
bool has_value(Signal const& s) const noexcept
{
return std::visit(
Overloaded{[](Value v) { return true; }, [&](Wire const& w) { return has_value(w); }}, s);
}
/// Get the value on the wire
Value value(Wire const &w) const noexcept {
Value value(Wire const& w) const noexcept
{
assert(has_value(w));
return values_.find(w)->second;
}
/// Get the value of a signal
Value value(Signal const &s) const noexcept {
return std::visit(Overloaded{[](Value v) { return v; },
[&](Wire const &w) { return value(w); }},
s);
Value value(Signal const& s) const noexcept
{
return std::visit(
Overloaded{[](Value v) { return v; }, [&](Wire const& w) { return value(w); }}, s);
}
/// Set the value of a wire
void value(Wire const &w, Value value) {
void value(Wire const& w, Value value)
{
auto [it, success] = values_.insert({w, value});
assert(success);
}
/// Set the value of a signal
void value(Signal const &s, Value v) {
std::visit(Overloaded{[v](Value v2) { assert(v == v2); },
[&, v](Wire const &w) { value(w, v); }},
s);
void value(Signal const& s, Value v)
{
std::visit(
Overloaded{[v](Value v2) { assert(v == v2); }, [&, v](Wire const& w) { value(w, v); }}, s);
}
/// Execute the instructions. Returns true if we have updated some wire
/// values.
bool execute() {
bool execute()
{
bool done_anything = false;
for (auto const &instr : instrs_) {
for (auto const& instr : instrs_) {
done_anything |= execute_instr(instr);
}
@@ -268,15 +290,15 @@ private:
* An instruction may not be executed if the incoming signals have not been
* set yet.
*/
bool execute_instr(Instruction const &instr) {
bool execute_instr(Instruction const& instr)
{
std::cout << instr << " # ";
// First of all check there is something to do - i.e. that the destination
// register has not been set already.
Wire dest = instr.dest();
if (has_value(dest)) {
std::cout << "already has value: " << dest << " = " << value(dest)
<< "\n";
std::cout << "already has value: " << dest << " = " << value(dest) << "\n";
return false;
}
@@ -286,17 +308,13 @@ private:
case Action::Not:
return execute_single_src(instr, [](Value src) { return ~src; });
case Action::And:
return execute_double_src(
instr, [](Value src1, Value src2) { return src1 & src2; });
return execute_double_src(instr, [](Value src1, Value src2) { return src1 & src2; });
case Action::Or:
return execute_double_src(
instr, [](Value src1, Value src2) { return src1 | src2; });
return execute_double_src(instr, [](Value src1, Value src2) { return src1 | src2; });
case Action::LShift:
return execute_double_src(
instr, [](Value src1, Value src2) { return src1 << src2; });
return execute_double_src(instr, [](Value src1, Value src2) { return src1 << src2; });
case Action::RShift:
return execute_double_src(
instr, [](Value src1, Value src2) { return src1 >> src2; });
return execute_double_src(instr, [](Value src1, Value src2) { return src1 >> src2; });
}
return false;
@@ -307,8 +325,8 @@ private:
* \param fn How to modify the source value to the dest.
* \return True if we executed the function.
*/
bool execute_single_src(Instruction const &instr,
std::function<Value(Value)> fn) {
bool execute_single_src(Instruction const& instr, std::function<Value(Value)> fn)
{
Wire dest = instr.dest();
Signal src = instr.src1();
if (has_value(src)) {
@@ -326,8 +344,8 @@ private:
* \param fn How to modify the source values to the dest.
* \return True if we executed the function.
*/
bool execute_double_src(Instruction const &instr,
std::function<Value(Value, Value)> fn) {
bool execute_double_src(Instruction const& instr, std::function<Value(Value, Value)> fn)
{
Wire dest = instr.dest();
Signal src1 = instr.src1();
Signal src2 = instr.src2();
@@ -345,7 +363,8 @@ private:
Instructions instrs_;
};
int main(int argc, char **argv) {
int main(int argc, char** argv)
{
VM vm;
// Parse the input
@@ -365,7 +384,8 @@ int main(int argc, char **argv) {
std::cout << "a = ";
if (!vm.has_value(a)) {
std::cout << "UNSET\n";
} else {
}
else {
std::cout << vm.value(a) << "\n";
}