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Changed 'undefined' to 'nil'.

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yhirose 2015-09-25 16:26:17 -04:00
parent f9ef592bd3
commit 4a58f35d3d
2 changed files with 47 additions and 47 deletions
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56
language/culebra/culebra.h
View File

@ -38,7 +38,7 @@ const auto grammar_ = R"(
WHILE <- while _ EXPRESSION _ BLOCK
IF <- if _ EXPRESSION _ BLOCK (_ else _ if _ EXPRESSION _ BLOCK)* (_ else _ BLOCK)?
PRIMARY <- WHILE / IF / FUNCTION / OBJECT / ARRAY / UNDEFINED / BOOLEAN / NUMBER / IDENTIFIER / STRING / INTERPOLATED_STRING / '(' _ EXPRESSION _ ')'
PRIMARY <- WHILE / IF / FUNCTION / OBJECT / ARRAY / NIL / BOOLEAN / NUMBER / IDENTIFIER / STRING / INTERPOLATED_STRING / '(' _ EXPRESSION _ ')'
FUNCTION <- fn _ PARAMETERS _ BLOCK
PARAMETERS <- '(' _ (PARAMETER (_ ',' _ PARAMETER)*)? _ ')'
@ -63,7 +63,7 @@ const auto grammar_ = R"(
ARRAY <- '[' _ SEQUENCE _ ']' (_ '(' _ EXPRESSION (_ ',' _ EXPRESSION)? _ ')')?
UNDEFINED <- < 'undefined' _wd_ >
NIL <- < 'nil' _wd_ >
BOOLEAN <- < ('true' / 'false') _wd_ >
NUMBER <- < [0-9]+ >
@ -160,9 +160,9 @@ struct ArrayValue : public ObjectValue {
struct Value
{
enum Type { Undefined, Bool, Long, String, Object, Array, Function };
enum Type { Nil, Bool, Long, String, Object, Array, Function };
Value() : type(Undefined) {}
Value() : type(Nil) {}
Value(const Value& rhs) : type(rhs.type), v(rhs.v) {}
Value(Value&& rhs) : type(rhs.type), v(rhs.v) {}
@ -256,7 +256,7 @@ struct Value
std::string str() const {
switch (type) {
case Undefined: return "undefined";
case Nil: return "nil";
case Bool: return to_bool() ? "true" : "false";
case Long: return std::to_string(to_long());
case String: return "'" + to_string() + "'";
@ -275,10 +275,10 @@ 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();
case Nil: return rhs.type == Nil;
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.");
}
@ -291,10 +291,10 @@ struct Value
bool operator<=(const Value& rhs) const {
switch (type) {
case Undefined: return false;
case Bool: return to_bool() <= rhs.to_bool();
case Long: return to_long() <= rhs.to_long();
case String: return to_string() <= rhs.to_string();
case Nil: return false;
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.");
}
@ -303,10 +303,10 @@ struct Value
bool operator<(const Value& rhs) const {
switch (type) {
case Undefined: return false;
case Bool: return to_bool() < rhs.to_bool();
case Long: return to_long() < rhs.to_long();
case String: return to_string() < rhs.to_string();
case Nil: return false;
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.");
}
@ -315,10 +315,10 @@ struct Value
bool operator>=(const Value& rhs) const {
switch (type) {
case Undefined: return false;
case Bool: return to_bool() >= rhs.to_bool();
case Long: return to_long() >= rhs.to_long();
case String: return to_string() >= rhs.to_string();
case Nil: return false;
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.");
}
@ -327,10 +327,10 @@ struct Value
bool operator>(const Value& rhs) const {
switch (type) {
case Undefined: return false;
case Bool: return to_bool() > rhs.to_bool();
case Long: return to_long() > rhs.to_long();
case String: return to_string() > rhs.to_string();
case Nil: return false;
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.");
}
@ -575,7 +575,7 @@ struct Interpreter
case "IDENTIFIER"_: return eval_identifier(ast, env);
case "OBJECT"_: return eval_object(ast, env);
case "ARRAY"_: return eval_array(ast, env);
case "UNDEFINED"_: return eval_undefined(ast, env);
case "NIL"_: return eval_nil(ast, env);
case "BOOLEAN"_: return eval_bool(ast, env);
case "NUMBER"_: return eval_number(ast, env);
case "INTERPOLATED_STRING"_: return eval_interpolated_string(ast, env);
@ -813,7 +813,7 @@ private:
}
bool is_keyword(const std::string& ident) const {
static std::set<std::string> keywords = { "undefined", "true", "false", "mut", "debugger", "return", "while", "if", "else", "fn" };
static std::set<std::string> keywords = { "nil", "true", "false", "mut", "debugger", "return", "while", "if", "else", "fn" };
return keywords.find(ident) != keywords.end();
}
@ -924,7 +924,7 @@ private:
return Value(std::move(arr));
}
Value eval_undefined(const peg::Ast& ast, std::shared_ptr<Environment> env) {
Value eval_nil(const peg::Ast& ast, std::shared_ptr<Environment> env) {
return Value();
};

38
language/culebra/samples/test.cul
View File

@ -27,23 +27,23 @@ test_return = fn () {
assert(val == 1)
}
test_undefined = fn () {
assert(undefined == undefined)
assert(!(undefined != undefined))
test_nil = fn () {
assert(nil == nil)
assert(!(nil != nil))
a = undefined
assert(a == undefined)
assert(!(a != undefined))
assert(!(a <= undefined))
assert(!(a < undefined))
assert(!(a >= undefined))
assert(!(a > undefined))
assert(undefined == a)
assert(!(undefined != a))
assert(!(undefined <= a))
assert(!(undefined < a))
assert(!(undefined >= a))
assert(!(undefined > a))
a = nil
assert(a == nil)
assert(!(a != nil))
assert(!(a <= nil))
assert(!(a < nil))
assert(!(a >= nil))
assert(!(a > nil))
assert(nil == a)
assert(!(nil != a))
assert(!(nil <= a))
assert(!(nil < a))
assert(!(nil >= a))
assert(!(nil > a))
}
test_closure = fn () {
@ -83,7 +83,7 @@ test_array = fn () {
assert(e.size() == 3 && e[-1] == 3)
f = [1,2,3](5)
assert(f.size() == 5 && f[-1] == undefined)
assert(f.size() == 5 && f[-1] == nil)
}
g_ = 1
@ -114,7 +114,7 @@ test_object = fn () {
a = {}
a.b = 1
assert(a.a == undefined)
assert(a.a == nil)
assert(a.b == 1)
assert(a.size() == 1)
}
@ -233,7 +233,7 @@ debugger
test_call()
test_return()
test_closure()
test_undefined()
test_nil()
test_array()
test_function()
test_object()