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Supported 'undefined' type correctly.

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This commit is contained in:
yhirose 2015-07-25 13:34:10 -04:00
parent e96336a463
commit 75399c2e19
2 changed files with 39 additions and 13 deletions
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32
language/culebra.h
View File

@ -30,7 +30,7 @@ const auto grammar_ = R"(
INDEX <- '[' _ EXPRESSION ']' _
DOT <- '.' _ IDENTIFIER
PRIMARY <- WHILE / IF / FUNCTION / IDENTIFIER / OBJECT / ARRAY / NUMBER / BOOLEAN / STRING / INTERPOLATED_STRING / '(' _ EXPRESSION ')' _
PRIMARY <- WHILE / IF / FUNCTION / OBJECT / ARRAY / UNDEFINED / BOOLEAN / NUMBER / IDENTIFIER / STRING / INTERPOLATED_STRING / '(' _ EXPRESSION ')' _
FUNCTION <- 'fn' _ PARAMETERS BLOCK
PARAMETERS <- '(' _ (PARAMETER (',' _ PARAMETER)*)? ')' _
@ -52,8 +52,9 @@ const auto grammar_ = R"(
ARRAY <- '[' _ (EXPRESSION (',' _ EXPRESSION)*)? ']' _
NUMBER <- < [0-9]+ > _
UNDEFINED <- < 'undefined' > _
BOOLEAN <- < ('true' / 'false') > _
NUMBER <- < [0-9]+ > _
STRING <- ['] < (!['] .)* > ['] _
INTERPOLATED_STRING <- '"' ('{' _ EXPRESSION '}' / INTERPOLATED_CONTENT)* '"' _
@ -278,11 +279,11 @@ struct Value
bool operator==(const Value& rhs) const {
switch (type) {
case Undefined: return true;
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: Array support
// TODO: Object and Array support
default: throw std::logic_error("invalid internal condition.");
}
// NOTREACHED
@ -290,11 +291,11 @@ struct Value
bool operator!=(const Value& rhs) const {
switch (type) {
case Undefined: return false;
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: Array support
// TODO: Object and Array support
default: throw std::logic_error("invalid internal condition.");
}
// NOTREACHED
@ -306,7 +307,7 @@ struct Value
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: Array support
// TODO: Object and Array support
default: throw std::logic_error("invalid internal condition.");
}
// NOTREACHED
@ -318,7 +319,7 @@ struct Value
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: Array support
// TODO: Object and Array support
default: throw std::logic_error("invalid internal condition.");
}
// NOTREACHED
@ -330,7 +331,7 @@ struct Value
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: Array support
// TODO: Object and Array support
default: throw std::logic_error("invalid internal condition.");
}
// NOTREACHED
@ -342,7 +343,7 @@ struct Value
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: Array support
// TODO: Object and Array support
default: throw std::logic_error("invalid internal condition.");
}
// NOTREACHED
@ -555,8 +556,9 @@ struct Eval
case "IDENTIFIER"_: return eval_identifier(ast, env);
case "OBJECT"_: return eval_object(ast, env);
case "ARRAY"_: return eval_array(ast, env);
case "NUMBER"_: return eval_number(ast, env);
case "UNDEFINED"_: return eval_undefined(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);
}
@ -836,14 +838,18 @@ private:
return Value(std::move(arr));
}
static Value eval_number(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
return Value(stol(ast.token));
static Value eval_undefined(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
return Value();
};
static Value eval_bool(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
return Value(ast.token == "true");
};
static Value eval_number(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
return Value(stol(ast.token));
};
static Value eval_interpolated_string(const peglib::Ast& ast, std::shared_ptr<Environment> env) {
std::string s;
for (auto node: ast.nodes) {

20
language/samples/test.cul
View File

@ -4,6 +4,25 @@ test_call = fn () {
assert(ret == 5)
}
test_undefined = fn () {
assert(undefined == undefined)
assert(!(undefined != undefined))
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))
}
test_closure = fn () {
make_func = fn (mut x) {
mut n = 100
@ -117,6 +136,7 @@ test_interpolated_string = fn () {
test_call()
test_closure()
test_undefined()
test_array()
test_function()
test_object()