TEST(TestDeclaration, testLet)
{
PARSE_STATEMENT(L"let a : Int[] = [1, 2, 3]");
ValueBindingsPtr c;
IdentifierPtr id;
ValueBindingPtr a;
ArrayLiteralPtr value;
ArrayTypePtr type;
TypeIdentifierPtr Int;
ASSERT_NOT_NULL(c = std::dynamic_pointer_cast<ValueBindings>(root));
ASSERT_TRUE(c->isReadOnly());
ASSERT_EQ(1, c->numBindings());
ASSERT_NOT_NULL(a = c->get(0));
ASSERT_NOT_NULL(id = std::dynamic_pointer_cast<Identifier>(a->getName()));
ASSERT_EQ(L"a", id->getIdentifier());
ASSERT_NOT_NULL(type = std::dynamic_pointer_cast<ArrayType>(a->getDeclaredType()));
ASSERT_NOT_NULL(Int = std::dynamic_pointer_cast<TypeIdentifier>(type->getInnerType()));
ASSERT_EQ(L"Int", Int->getName());
ASSERT_NOT_NULL(value = std::dynamic_pointer_cast<ArrayLiteral>(c->get(0)->getInitializer()));
ASSERT_EQ(3, value->numElements());
ASSERT_EQ(L"1", std::dynamic_pointer_cast<IntegerLiteral>(value->getElement(0))->valueAsString);
ASSERT_EQ(L"2", std::dynamic_pointer_cast<IntegerLiteral>(value->getElement(1))->valueAsString);
ASSERT_EQ(L"3", std::dynamic_pointer_cast<IntegerLiteral>(value->getElement(2))->valueAsString);
}
/*
GRAMMAR OF A CONSTANT DECLARATION
constant-declaration → attributes opt declaration-specifiers opt let pattern-initializer-list
pattern-initializer-list → pattern-initializer | pattern-initializer,pattern-initializer-list
pattern-initializer → pattern initializer opt
initializer → =expression
*/
DeclarationPtr Parser::parseLet(const std::vector<AttributePtr>& attrs, int specifiers)
{
Token token;
Flags flag(this, UNDER_LET);
expect(Keyword::Let, token);
ValueBindingsPtr ret = nodeFactory->createValueBindings(token.state);
ret->setReadOnly(true);
ret->setAttributes(attrs);
ret->setSpecifiers(specifiers);
do
{
PatternPtr pattern = parsePattern();
ExpressionPtr initializer = NULL;
if(match(L"="))
{
initializer = parseExpression();
}
ValueBindingPtr constant = nodeFactory->createValueBinding(*pattern->getSourceInfo());
constant->setAttributes(attrs);
constant->setSpecifiers(specifiers);
constant->setName(pattern);
TypedPatternPtr typedPattern = std::dynamic_pointer_cast<TypedPattern>(pattern);
if(typedPattern)
{
//promote typed pattern
constant->setDeclaredType(typedPattern->getDeclaredType());
constant->setName(typedPattern->getPattern());
}
constant->setInitializer(initializer);
ret->add(constant);
}while(match(L","));
return ret;
}
TEST(TestDeclaration, testLet_Tuple)
{
PARSE_STATEMENT(L"let (a, b) : Int = (1, 2)");
ValueBindingsPtr c;
TuplePtr tuple;
TypeIdentifierPtr type;
ParenthesizedExpressionPtr p;
ASSERT_NOT_NULL(c = std::dynamic_pointer_cast<ValueBindings>(root));
ASSERT_TRUE(c->isReadOnly());
ASSERT_NOT_NULL(tuple = std::dynamic_pointer_cast<Tuple>(c->get(0)->getName()));
ASSERT_EQ(2, tuple->numElements());
ASSERT_NOT_NULL(type = std::dynamic_pointer_cast<TypeIdentifier>(c->get(0)->getDeclaredType()));
ASSERT_NOT_NULL(p = std::dynamic_pointer_cast<ParenthesizedExpression>(c->get(0)->getInitializer()));
ASSERT_EQ(2, p->numExpressions());
}
TEST(TestDeclaration, testVar_Typed)
{
PARSE_STATEMENT(L"var welcomeMessage: String");
ValueBindingsPtr vars;
ValueBindingPtr var;
IdentifierPtr id;
TypeIdentifierPtr t;
ASSERT_NOT_NULL(vars = std::dynamic_pointer_cast<ValueBindings>(root));
ASSERT_TRUE(!vars->isReadOnly());
ASSERT_EQ(1, vars->numBindings());
ASSERT_NOT_NULL(var = std::dynamic_pointer_cast<ValueBinding>(vars->get(0)));
ASSERT_NOT_NULL(id = std::dynamic_pointer_cast<Identifier>(var->getName()));
ASSERT_EQ(L"welcomeMessage", id->getIdentifier());
ASSERT_NOT_NULL(t = std::dynamic_pointer_cast<TypeIdentifier>(var->getDeclaredType()));
ASSERT_EQ(L"String", t->getName());
}
TEST(TestDeclaration, testVar)
{
PARSE_STATEMENT(L"var currentLoginAttempt = 0");
ValueBindingsPtr vars;
ValueBindingPtr var;
IdentifierPtr id;
IntegerLiteralPtr i;
ASSERT_NOT_NULL(vars = std::dynamic_pointer_cast<ValueBindings>(root));
ASSERT_TRUE(!vars->isReadOnly());
ASSERT_EQ(1, vars->numBindings());
ASSERT_NOT_NULL(var = std::dynamic_pointer_cast<ValueBinding>(vars->get(0)));
ASSERT_NOT_NULL(id = std::dynamic_pointer_cast<Identifier>(var->getName()));
ASSERT_EQ(L"currentLoginAttempt", id->getIdentifier());
ASSERT_NOT_NULL(i = std::dynamic_pointer_cast<IntegerLiteral>(var->getInitializer()));
ASSERT_EQ(L"0", i->valueAsString);
}
TEST(TestDeclaration, testVar_Multiple)
{
PARSE_STATEMENT(L"var x = 0.0, y = 0.0, z = 0.0");
ValueBindingsPtr vars;
ValueBindingPtr var;
IdentifierPtr id;
FloatLiteralPtr f;
ASSERT_NOT_NULL(vars = std::dynamic_pointer_cast<ValueBindings>(root));
ASSERT_TRUE(!vars->isReadOnly());
ASSERT_EQ(3, vars->numBindings());
ASSERT_NOT_NULL(var = std::dynamic_pointer_cast<ValueBinding>(vars->get(0)));
ASSERT_NOT_NULL(id = std::dynamic_pointer_cast<Identifier>(var->getName()));
ASSERT_EQ(L"x", id->getIdentifier());
ASSERT_NOT_NULL(f = std::dynamic_pointer_cast<FloatLiteral>(var->getInitializer()));
ASSERT_EQ(L"0.0", f->valueAsString);
ASSERT_NOT_NULL(var = std::dynamic_pointer_cast<ValueBinding>(vars->get(1)));
ASSERT_NOT_NULL(id = std::dynamic_pointer_cast<Identifier>(var->getName()));
ASSERT_EQ(L"y", id->getIdentifier());
ASSERT_NOT_NULL(f = std::dynamic_pointer_cast<FloatLiteral>(var->getInitializer()));
ASSERT_EQ(L"0.0", f->valueAsString);
ASSERT_NOT_NULL(var = std::dynamic_pointer_cast<ValueBinding>(vars->get(2)));
ASSERT_NOT_NULL(id = std::dynamic_pointer_cast<Identifier>(var->getName()));
ASSERT_EQ(L"z", id->getIdentifier());
ASSERT_NOT_NULL(f = std::dynamic_pointer_cast<FloatLiteral>(var->getInitializer()));
ASSERT_EQ(L"0.0", f->valueAsString);
}
TEST(TestDeclaration, testLet_Multiple)
{
PARSE_STATEMENT(L"let a=[k1 : 1, k2 : 2], b : Int = 2");
ValueBindingsPtr c;
ValueBindingPtr b;
IdentifierPtr id;
TypeIdentifierPtr Int;
DictionaryLiteralPtr dict;
ASSERT_NOT_NULL(c = std::dynamic_pointer_cast<ValueBindings>(root));
ASSERT_TRUE(c->isReadOnly());
ASSERT_EQ(2, c->numBindings());
ASSERT_NOT_NULL(id = std::dynamic_pointer_cast<Identifier>(c->get(0)->getName()));
ASSERT_EQ(L"a", id->getIdentifier());
ASSERT_NOT_NULL(dict = std::dynamic_pointer_cast<DictionaryLiteral>(c->get(0)->getInitializer()));
ASSERT_EQ(2, dict->numElements());
ASSERT_NOT_NULL(b = c->get(1));
ASSERT_NOT_NULL(id = std::dynamic_pointer_cast<Identifier>(b->getName()));
ASSERT_EQ(L"b", id->getIdentifier());
ASSERT_NOT_NULL(Int = std::dynamic_pointer_cast<TypeIdentifier>(b->getDeclaredType()));
ASSERT_EQ(L"Int", Int->getName());
}
/*
GRAMMAR OF A VARIABLE DECLARATION
variable-declaration → variable-declaration-head pattern-initializer-list
variable-declaration → variable-declaration-head variable-name type-annotation code-block
variable-declaration → variable-declaration-head variable-name type-annotation getter-setter-block
variable-declaration → variable-declaration-head variable-name type-annotation getter-setter-keyword-block
variable-declaration → variable-declaration-head variable-name type-annotation initializer opt willSet-didSet-block
variable-declaration-head → attributes opt declaration-specifiers opt var
variable-name → identifier
*/
DeclarationPtr Parser::parseVar(const std::vector<AttributePtr>& attrs, int specifiers)
{
Token token;
expect(Keyword::Var, token);
Flags flags(this, UNDER_VAR);
//try read it as pattern-initializer-list
ValueBindingsPtr ret = nodeFactory->createValueBindings(token.state);
ret->setReadOnly(false);
ret->setAttributes(attrs);
ret->setSpecifiers(specifiers);
ValueBindingPtr var = parseVariableDeclaration();
var->setSpecifiers(specifiers);
ret->add(var);
if(predicate(L","))
{
while(match(L","))
{
var = parseVariableDeclaration();
var->setSpecifiers(specifiers);
ret->add(var);
}
return ret;
}
if(!match(L"{"))
return ret;
peek(token);
IdentifierPtr name = std::dynamic_pointer_cast<Identifier>(var->getName());
tassert(token, name != nullptr, Errors::E_GETTER_SETTER_CAN_ONLY_BE_DEFINED_FOR_A_SINGLE_VARIABLE, L"");
ComputedPropertyPtr prop = nodeFactory->createComputedProperty(*var->getSourceInfo());
prop->setAttributes(attrs);
prop->setSpecifiers(specifiers);
prop->setTypeAttributes(var->getTypeAttributes());
prop->setName(name->getIdentifier());
prop->setDeclaredType(var->getDeclaredType());
prop->setInitializer(var->getInitializer());
var = nullptr;
ret = nullptr;
if(token.type != TokenType::CloseBrace)
{
Flags flags(this, SUPPRESS_TRAILING_CLOSURE);
switch(token.getKeyword())
{
case Keyword::Get:
case Keyword::Set:
if(this->flags & UNDER_PROTOCOL)
{
// variable-declaration → variable-declaration-head variable-name type-annotation getter-setter-keyword-block
//no code block for getter/setter for protocol
std::pair<CodeBlockPtr, CodeBlockPtr> r = parseGetterSetterKeywordBlock();
prop->setGetter(r.first);
prop->setSetter(r.second);
}
else
{
// variable-declaration → variable-declaration-head variable-name type-annotation getter-setter-block
std::pair<CodeBlockPtr, std::pair<std::wstring, CodeBlockPtr> > r = parseGetterSetterBlock();
prop->setGetter(r.first);
prop->setSetterName(r.second.first);
prop->setSetter(r.second.second);
}
break;
case Keyword::WillSet:
case Keyword::DidSet:
// variable-declaration → variable-declaration-head variable-name type-annotation initializer opt willSet-didSet-block
parseWillSetDidSetBlock(prop);
break;
default:
// variable-declaration → variable-declaration-head variable-name type-annotation code-block
CodeBlockPtr getter = nodeFactory->createCodeBlock(token.state);
prop->setGetter(getter);
do
{
StatementPtr st = parseStatement();
getter->addStatement(st);
}while(!predicate(L"}"));
break;
}
}
expect(L"}");
return prop;
}
void NodeSerializer::visitValueBindings(const ValueBindingsPtr &node)
{
append(node->isReadOnly() ? L"let " : L"var ");
NodeVisitor::visitValueBindings(node);
}