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Code cleanup.

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This commit is contained in:
yhirose 2015-07-25 14:58:29 -04:00
parent f3e44ae16c
commit 0e0e3f6f24
2 changed files with 107 additions and 171 deletions
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248
language/culebra.h
View File

@ -101,21 +101,14 @@ struct FunctionValue {
bool mut;
};
struct Data {
std::vector<Parameter> params;
std::function<Value (std::shared_ptr<Environment> env)> eval;
};
FunctionValue(
const std::vector<Parameter>& params,
const std::function<Value (std::shared_ptr<Environment> env)>& eval) {
const std::function<Value (std::shared_ptr<Environment> env)>& eval)
: params(std::make_shared<std::vector<Parameter>>(params))
, eval(eval) {}
data = std::make_shared<Data>();
data->params = params;
data->eval = eval;
}
std::shared_ptr<Data> data;
std::shared_ptr<std::vector<Parameter>> params;
std::function<Value (std::shared_ptr<Environment> env)> eval;
};
struct ObjectValue {
@ -173,10 +166,6 @@ struct Value
explicit Value(ArrayValue&& a) : type(Array), v(a) {}
explicit Value(FunctionValue&& f) : type(Function), v(f) {}
Type get_type() const {
return type;
}
bool to_bool() const {
switch (type) {
case Bool: return v.get<bool>();
@ -200,6 +189,13 @@ struct Value
}
}
FunctionValue to_function() const {
switch (type) {
case Function: return v.get<FunctionValue>();
default: throw std::runtime_error("type error.");
}
}
ObjectValue to_object() const {
switch (type) {
case Object: return v.get<ObjectValue>();
@ -214,13 +210,6 @@ struct Value
}
}
FunctionValue to_function() const {
switch (type) {
case Function: return v.get<FunctionValue>();
default: throw std::runtime_error("type error.");
}
}
Value get_property(const std::string& name) const {
switch (type) {
case Object: return to_object().get_property(name);
@ -290,15 +279,7 @@ struct Value
}
bool operator!=(const Value& rhs) const {
switch (type) {
case Undefined: return rhs.type != Undefined;
case Bool: return to_bool() != rhs.to_bool();
case Long: return to_long() != rhs.to_long();
case String: return to_string() != rhs.to_string();
// TODO: Object and Array support
default: throw std::logic_error("invalid internal condition.");
}
// NOTREACHED
return !operator==(rhs);
}
bool operator<=(const Value& rhs) const {
@ -349,12 +330,8 @@ struct Value
// NOTREACHED
}
private:
friend std::ostream& operator<<(std::ostream&, const Value&);
Type type;
peglib::any v;
};
inline std::ostream& operator<<(std::ostream& os, const Value& val)
@ -366,19 +343,11 @@ struct Environment
{
Environment() = default;
void set_object(const ObjectValue& obj) {
obj_ = obj;
}
void set_outer(std::shared_ptr<Environment> outer) {
outer_ = outer;
}
void append_outer(std::shared_ptr<Environment> outer) {
if (outer_) {
outer_->append_outer(outer);
if (this->outer) {
this->outer->append_outer(outer);
} else {
outer_ = outer;
this->outer = outer;
}
}
@ -386,21 +355,21 @@ struct Environment
if (dic_.find(s) != dic_.end()) {
return true;
}
if (obj_.has_property(s)) {
if (object.has_property(s)) {
return true;
}
return outer_ && outer_->has(s);
return outer && outer->has(s);
}
Value get(const std::string& s) const {
if (dic_.find(s) != dic_.end()) {
return dic_.at(s).val;
}
if (obj_.has_property(s)) {
return obj_.get_property(s);
if (object.has_property(s)) {
return object.get_property(s);
}
if (outer_) {
return outer_->get(s);
if (outer) {
return outer->get(s);
}
std::string msg = "undefined variable '" + s + "'...";
throw std::runtime_error(msg);
@ -417,8 +386,8 @@ struct Environment
sym.val = val;
return;
}
if (outer_ && outer_->has(s)) {
outer_->assign(s, val);
if (outer && outer->has(s)) {
outer->assign(s, val);
return;
}
// NOTREACHED
@ -430,35 +399,35 @@ struct Environment
dic_[s] = Symbol{val, mut};
}
std::shared_ptr<Environment> outer;
ObjectValue object;
private:
struct Symbol {
Value val;
bool mut;
};
std::shared_ptr<Environment> outer_;
std::map<std::string, Symbol> dic_;
ObjectValue obj_;
};
inline bool ObjectValue::has_property(const std::string& name) const {
if (properties->find(name) == properties->end()) {
const auto& proto = const_cast<ObjectValue*>(this)->builtins();
return proto.find(name) != proto.end();
const auto& props = const_cast<ObjectValue*>(this)->builtins();
return props.find(name) != props.end();
}
return true;
}
inline Value ObjectValue::get_property(const std::string& name) const {
if (properties->find(name) == properties->end()) {
const auto& proto = const_cast<ObjectValue*>(this)->builtins();
return proto.at(name);
const auto& props = const_cast<ObjectValue*>(this)->builtins();
return props.at(name);
}
return properties->at(name);
}
inline std::map<std::string, Value>& ObjectValue::builtins() {
static std::map<std::string, Value> proto_ = {
static std::map<std::string, Value> props_ = {
{
"size",
Value(FunctionValue(
@ -471,11 +440,11 @@ inline std::map<std::string, Value>& ObjectValue::builtins() {
))
}
};
return proto_;
return props_;
}
inline std::map<std::string, Value>& ArrayValue::builtins() {
static std::map<std::string, Value> proto_ = {
static std::map<std::string, Value> props_ = {
{
"size",
Value(FunctionValue(
@ -500,23 +469,24 @@ inline std::map<std::string, Value>& ArrayValue::builtins() {
})
}
};
return proto_;
return props_;
}
inline void setup_built_in_functions(Environment& env) {
{
auto f = FunctionValue(
env.initialize(
"puts",
Value(FunctionValue(
{ {"arg", true} },
[](std::shared_ptr<Environment> env) {
std::cout << env->get("arg").str() << std::endl;
return Value();
}
);
env.initialize("puts", Value(std::move(f)), false);
}
)),
false);
{
auto f = FunctionValue(
env.initialize(
"assert",
Value(FunctionValue(
{ {"arg", true} },
[](std::shared_ptr<Environment> env) {
auto cond = env->get("arg").to_bool();
@ -528,9 +498,8 @@ inline void setup_built_in_functions(Environment& env) {
}
return Value();
}
);
env.initialize("assert", Value(std::move(f)), false);
}
)),
false);
}
struct Eval
@ -623,15 +592,13 @@ private:
auto body = ast.nodes[1];
auto f = FunctionValue(
return Value(FunctionValue(
params,
[=](std::shared_ptr<Environment> callEnv) {
callEnv->append_outer(env);
return eval(*body, callEnv);
}
);
return Value(std::move(f));
));
};
static Value eval_call(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
@ -644,7 +611,7 @@ private:
if (n.original_tag == "ARGUMENTS"_) {
// Function call
const auto& f = val.to_function();
const auto& params = f.data->params;
const auto& params = *f.params;
const auto& args = n.nodes;
if (params.size() <= args.size()) {
auto callEnv = std::make_shared<Environment>();
@ -661,7 +628,7 @@ private:
callEnv->initialize("__LINE__", Value((long)ast.line), false);
callEnv->initialize("__COLUMN__", Value((long)ast.column), false);
val = f.data->eval(callEnv);
val = f.eval(callEnv);
} else {
std::string msg = "arguments error...";
throw std::runtime_error(msg);
@ -677,22 +644,18 @@ private:
// Property
auto name = n.token;
auto prop = val.get_property(name);
if (prop.get_type() == Value::Function) {
if (prop.type == Value::Function) {
const auto& pf = prop.to_function();
auto f = FunctionValue(
pf.data->params,
val = Value(FunctionValue(
*pf.params,
[=](std::shared_ptr<Environment> callEnv) {
callEnv->initialize("this", val, false);
if (val.get_type() == Value::Object) {
callEnv->set_object(val.to_object());
if (val.type == Value::Object) {
callEnv->object = val.to_object();
}
return pf.data->eval(callEnv);
return pf.eval(callEnv);
}
);
val = Value(std::move(f));
));
} else {
val = prop;
}
@ -701,83 +664,61 @@ private:
}
}
return val;
return std::move(val);
}
static Value eval_logical_or(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
if (ast.nodes.size() == 1) {
return eval(*ast.nodes[0], env);
} else {
Value ret;
for (auto node: ast.nodes) {
ret = eval(*node, env);
if (ret.to_bool()) {
return ret;
}
assert(ast.nodes.size() > 1); // if the size is 1, thes node will be hoisted.
Value val;
for (auto node: ast.nodes) {
val = eval(*node, env);
if (val.to_bool()) {
return std::move(val);
}
return ret;
}
return std::move(val);
}
static Value eval_logical_and(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
Value ret;
Value val;
for (auto node: ast.nodes) {
ret = eval(*node, env);
if (!ret.to_bool()) {
return ret;
val = eval(*node, env);
if (!val.to_bool()) {
return std::move(val);
}
}
return ret;
return std::move(val);
}
static Value eval_condition(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
if (ast.nodes.size() == 1) {
return eval(*ast.nodes[0], env);
} else {
auto lhs = eval(*ast.nodes[0], env);
auto ope = eval(*ast.nodes[1], env).to_string();
auto rhs = eval(*ast.nodes[2], env);
assert(ast.nodes.size() == 3); // if the size is 1, thes node will be hoisted.
if (ope == "==") {
return Value(lhs == rhs);
} else if (ope == "!=") {
return Value(lhs != rhs);
} else if (ope == "<=") {
return Value(lhs <= rhs);
} else if (ope == "<") {
return Value(lhs < rhs);
} else if (ope == ">=") {
return Value(lhs >= rhs);
} else if (ope == ">") {
return Value(lhs > rhs);
} else {
throw std::logic_error("invalid internal condition.");
}
}
auto lhs = eval(*ast.nodes[0], env);
auto ope = eval(*ast.nodes[1], env).to_string();
auto rhs = eval(*ast.nodes[2], env);
if (ope == "==") { return Value(lhs == rhs); }
else if (ope == "!=") { return Value(lhs != rhs); }
else if (ope == "<=") { return Value(lhs <= rhs); }
else if (ope == "<") { return Value(lhs < rhs); }
else if (ope == ">=") { return Value(lhs >= rhs); }
else if (ope == ">") { return Value(lhs > rhs); }
else { throw std::logic_error("invalid internal condition."); }
}
static Value eval_unary_plus(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
if (ast.nodes.size() == 1) {
return eval(*ast.nodes[0], env);
} else {
return eval(*ast.nodes[1], env);
}
assert(ast.nodes.size() == 2); // if the size is 1, thes node will be hoisted.
return eval(*ast.nodes[1], env);
}
static Value eval_unary_minus(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
if (ast.nodes.size() == 1) {
return eval(*ast.nodes[0], env);
} else {
return Value(eval(*ast.nodes[1], env).to_long() * -1);
}
assert(ast.nodes.size() == 2); // if the size is 1, thes node will be hoisted.
return Value(eval(*ast.nodes[1], env).to_long() * -1);
}
static Value eval_unary_not(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
if (ast.nodes.size() == 1) {
return eval(*ast.nodes[0], env);
} else {
return Value(!eval(*ast.nodes[1], env).to_bool());
}
assert(ast.nodes.size() == 2); // if the size is 1, thes node will be hoisted.
return Value(!eval(*ast.nodes[1], env).to_bool());
}
static Value eval_bin_expression(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
@ -797,44 +738,39 @@ private:
}
static Value eval_assignment(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
const auto& mut = ast.nodes[0]->token;
const auto& var = ast.nodes[1]->token;
auto val = eval(*ast.nodes[2], env);
if (env->has(var)) {
env->assign(var, val);
} else {
const auto& mut = ast.nodes[0]->token;
env->initialize(var, val, mut == "mut");
}
return val;
return std::move(val);
};
static Value eval_identifier(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
const auto& var = ast.token;
return env->get(var);
return env->get(ast.token);
};
static Value eval_object(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
ObjectValue obj;
for (auto i = 0u; i < ast.nodes.size(); i++) {
const auto& prop = *ast.nodes[i];
const auto& name = prop.nodes[0]->token;
auto val = eval(*prop.nodes[1], env);
obj.properties->emplace(name, val);
}
return Value(std::move(obj));
}
static Value eval_array(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
ArrayValue arr;
for (auto i = 0u; i < ast.nodes.size(); i++) {
auto expr = ast.nodes[i];
auto val = eval(*expr, env);
arr.values->push_back(val);
}
return Value(std::move(arr));
}
@ -870,8 +806,6 @@ inline bool run(
bool print_ast)
{
try {
std::shared_ptr<peglib::Ast> ast;
auto& parser = get_parser();
parser.log = [&](size_t ln, size_t col, const std::string& err_msg) {
@ -880,6 +814,8 @@ inline bool run(
msg = ss.str();
};
std::shared_ptr<peglib::Ast> ast;
if (parser.parse_n(expr, len, ast)) {
if (print_ast) {
ast->print();

30
peglib.h
View File

@ -159,8 +159,8 @@ struct SemanticValue
SemanticValue()
: s(nullptr), n(0) {}
SemanticValue(const any& _val, const char* _name, const char* _s, size_t _n)
: val(_val), name(_name), s(_s), n(_n) {}
SemanticValue(const any& val, const char* name, const char* s, size_t n)
: val(val), name(name), s(s), n(n) {}
template <typename T>
T& get() {
@ -423,12 +423,12 @@ struct Context
std::map<std::pair<size_t, size_t>, std::tuple<size_t, any>> cache_result;
Context(const char* _s, size_t _l, size_t _def_count, bool enablePackratParsing)
: s(_s)
, l(_l)
Context(const char* s, size_t l, size_t def_count, bool enablePackratParsing)
: s(s)
, l(l)
, error_pos(nullptr)
, message_pos(nullptr)
, def_count(_def_count)
, def_count(def_count)
, cache_register(enablePackratParsing ? def_count * (l + 1) : 0)
, cache_success(enablePackratParsing ? def_count * (l + 1) : 0)
, stack_size(0)
@ -1953,25 +1953,25 @@ inline constexpr unsigned int operator "" _(const char* s, size_t) {
struct Ast
{
Ast(size_t _line, size_t _column, const char* _name, const std::vector<std::shared_ptr<Ast>>& _nodes)
: line(_line), column(_column), name(_name), original_name(name), is_token(false), nodes(_nodes)
Ast(size_t line, size_t column, const char* name, const std::vector<std::shared_ptr<Ast>>& nodes)
: line(line), column(column), name(name), original_name(name), is_token(false), nodes(nodes)
#ifdef PEGLIB_HAS_CONSTEXPR_SUPPORT
, tag(str2tag(_name)), original_tag(tag)
, tag(str2tag(name)), original_tag(tag)
#endif
{}
Ast(size_t _line, size_t _column, const char* _name, const std::string& _token)
: line(_line), column(_column), name(_name), original_name(name), is_token(true), token(_token)
Ast(size_t line, size_t column, const char* name, const std::string& token)
: line(line), column(column), name(name), original_name(name), is_token(true), token(token)
#ifdef PEGLIB_HAS_CONSTEXPR_SUPPORT
, tag(str2tag(_name)), original_tag(tag)
, tag(str2tag(name)), original_tag(tag)
#endif
{}
Ast(const Ast& ast, const char* _original_name)
: line(ast.line), column(ast.column), name(ast.name), original_name(_original_name)
Ast(const Ast& ast, const char* original_name)
: line(ast.line), column(ast.column), name(ast.name), original_name(original_name)
, is_token(ast.is_token), token(ast.token), nodes(ast.nodes)
#ifdef PEGLIB_HAS_CONSTEXPR_SUPPORT
, tag(ast.tag), original_tag(str2tag(_original_name))
, tag(ast.tag), original_tag(str2tag(original_name))
#endif
{}