bool VdfParser::ProcessArrayDeclaration(Tokens& tokens, VariableSpace& variables)
{
static map<TokenType, int> token_to_array_property{
{TokenKeywordFloat, VariableFloatArray},
{TokenKeywordInt, VariableIntArray},
{TokenKeywordString, VariableStringArray},
{TokenKeywordBool, VariableBoolArray},
{TokenId, VariableStructArray},
};
tokens.AssertToken(TokenKeywordArray, true);
tokens.AssertToken(TokenLessThan, true);
auto type = tokens.GetCurrentToken().type;
auto element_type_id = tokens.GetCurrentToken().text;
auto fq_type_id = ResolveFqId(element_type_id.c_str(), true, tokens);
assert(type == TokenKeywordFloat || type == TokenKeywordInt ||
type == TokenKeywordBool || type == TokenKeywordString ||
type == TokenId);
tokens.Next();
tokens.AssertToken(TokenGreaterThan, true);
auto id = (&variables == _variables.get()) ?
GetFqId(tokens.GetId().c_str()) : tokens.GetId();
if (!tokens.IsTokenOfType(TokenSharp, true))
{
variables.AddArray(fq_type_id.c_str(), id.c_str(), L"");
}
else
{
tokens.AssertToken(TokenLessThan, true);
auto start_index = _wtoi(tokens.GetLiteralValue().c_str());
tokens.AssertToken(TokenComma, true);
auto end_index = _wtoi(tokens.GetLiteralValue().c_str());
tokens.AssertToken(TokenGreaterThan, true);
for (int i = start_index; i <= end_index; ++i)
{
wostringstream output;
output << id << i;
auto variable_id = (&variables == _variables.get()) ?
GetFqId(output.str().c_str()) : output.str();
variables.AddArray(fq_type_id.c_str(), variable_id.c_str(), L"");
}
}
tokens.AssertToken(TokenSemiColon, true);
return true;
}
bool VdfParser::ProcessSimpleDeclaration(Tokens& tokens)
{
assert(_variables);
auto type = tokens.GetCurrentToken().type;
auto type_id = tokens.GetCurrentToken().text;
assert(type == TokenKeywordFloat || type == TokenKeywordInt ||
type == TokenKeywordBool || type == TokenKeywordString ||
type == TokenId);
tokens.Next();
auto id = tokens.GetId();
auto fq_type_id = ResolveFqId(type_id.c_str(), true, tokens);
if (!tokens.IsTokenOfType(TokenSharp, true))
{
_variables->Add(fq_type_id.c_str(), GetFqId(id.c_str()).c_str(), L"");
}
else
{
tokens.AssertToken(TokenLessThan, true);
auto start_index = boost::lexical_cast<int>(tokens.GetLiteralValue());
tokens.AssertToken(TokenComma, true);
auto end_index = boost::lexical_cast<int>(tokens.GetLiteralValue());
tokens.AssertToken(TokenGreaterThan, true);
for (int i = start_index; i <= end_index; ++i)
{
wostringstream output;
output << id << i;
wstring variable_id = GetFqId(output.str().c_str());
_variables->Add(fq_type_id.c_str(), variable_id.c_str(), L"");
}
}
tokens.AssertToken(TokenSemiColon, true);
return true;
}
bool VdfParser::ProcessStructDeclaration(Tokens& tokens)
{
tokens.AssertToken(TokenKeywordStruct, true);
auto struct_id = GetFqId(tokens.GetId().c_str());
tokens.AssertToken(TokenLeftBrace, true);
VariableSpace struct_variables;
static std::set<TokenType> s_allowed_types = {
TokenKeywordBool, TokenKeywordFloat, TokenKeywordInt, TokenKeywordString,
TokenKeywordArray, TokenId };
do
{
auto& type_token = tokens.GetCurrentToken();
if (s_allowed_types.find(type_token.type) == s_allowed_types.end())
{
throw(CompileError(type_token, CompileErrorTypeExpected,
L"Expected either one of float, int, string, bool, array, or a struct name."));
}
if (type_token.type == TokenKeywordArray)
{
ProcessArrayDeclaration(tokens, struct_variables);
}
else
{
auto type_id = ResolveFqId(type_token.text.c_str(), true, tokens);
if (type_token.type == TokenId)
{
if (!_variables->TypeExists(type_id.c_str()))
throw CompileError(type_token, CompileErrorTypeNotFound, L"Type not found.");
if (type_token.text == struct_id)
throw CompileError(type_token, CompileErrorNestStruct, L"Nested struct definition not allowed.");
}
tokens.Next();
auto& member_token = tokens.GetCurrentToken();
if (struct_variables.VariableExists(member_token.text.c_str()))
throw CompileError(type_token, CompileErrorMemeberExists, L"Duplicated struct member ids.");
auto prototype = _variables->GetType(type_id.c_str());
if (prototype == nullptr)
throw CompileError(type_token, CompileErrorTypeNotFound, L"Type not found.");
auto member = dynamic_cast<IVariable*>(prototype->Clone());
assert(member != nullptr);
member->SetId(member_token.text.c_str());
struct_variables.Add(member);
tokens.Next();
tokens.AssertToken(TokenSemiColon, true);
}
} while (!tokens.IsTokenOfType(TokenRightBrace, false));
tokens.Next();
tokens.AssertToken(TokenSemiColon, true);
_variables->AddType(struct_id.c_str(), struct_variables.Variables());
return true;
}
