// ----------------------------------------------------------------------------
// ParseTreeNode::parse
//
// Parses formatted text data. Current valid formatting is:
// (type) child = value;
// (type) child = value1, value2, ...;
// (type) child = { value1, value2, ... }
// (type) child { grandchild = value; etc... }
// (type) child : inherited { ... }
//
// All values are read as strings, but can be retrieved as string, int, bool
// or float.
// ----------------------------------------------------------------------------
bool ParseTreeNode::parse(Tokenizer& tz)
{
// Keep parsing until final } is reached (or end of file)
string name, type;
while (!tz.atEnd() && tz.current() != '}')
{
// Check for preprocessor stuff
if (parser_ && tz.current()[0] == '#')
{
if (!parsePreprocessor(tz))
return false;
tz.advToNextLine();
continue;
}
// If it's a special character (ie not a valid name), parsing fails
if (tz.isSpecialCharacter(tz.current().text[0]))
{
logError(tz, S_FMT("Unexpected special character '%s'", CHR(tz.current().text)));
return false;
}
// So we have either a node or property name
name = tz.current().text;
type.Empty();
if (name.empty())
{
logError(tz, "Unexpected empty string");
return false;
}
// Check for type+name pair
if (tz.peek() != '=' && tz.peek() != '{' && tz.peek() != ';' && tz.peek() != ':')
{
type = name;
name = tz.next().text;
if (name.empty())
{
logError(tz, "Unexpected empty string");
return false;
}
}
//Log::debug(S_FMT("%s \"%s\", op %s", CHR(type), CHR(name), CHR(tz.current().text)));
// Assignment
if (tz.advIfNext('=', 2))
{
if (!parseAssignment(tz, addChildPTN(name, type)))
return false;
}
// Child node
else if (tz.advIfNext('{', 2))
{
// Parse child node
if (!addChildPTN(name, type)->parse(tz))
return false;
}
// Child node (with no values/children)
else if (tz.advIfNext(';', 2))
{
// Add child node
addChildPTN(name, type);
continue;
}
// Child node + inheritance
else if (tz.advIfNext(':', 2))
{
// Check for opening brace
if (tz.checkNext('{'))
{
// Add child node
auto child = addChildPTN(name, type);
child->inherit_ = tz.current().text;
// Skip {
tz.adv(2);
// Parse child node
if (!child->parse(tz))
return false;
}
else if (tz.checkNext(';')) // Empty child node
{
// Add child node
auto child = addChildPTN(name, type);
child->inherit_ = tz.current().text;
// Skip ;
tz.adv(2);
continue;
}
else
{
logError(tz, S_FMT("Expecting \"{\" or \";\", got \"%s\"", CHR(tz.next().text)));
return false;
}
}
// Unexpected token
else
{
logError(tz, S_FMT("Unexpected token \"%s\"", CHR(tz.next().text)));
return false;
}
// Continue parsing
tz.adv();
}
// Success
return true;
}
// -----------------------------------------------------------------------------
// Parses an assignment operation at [tz]'s current token to [child]
// -----------------------------------------------------------------------------
bool ParseTreeNode::parseAssignment(Tokenizer& tz, ParseTreeNode* child) const
{
// Check type of assignment list
char list_end = ';';
if (tz.current() == '{' && !tz.current().quoted_string)
{
list_end = '}';
tz.adv();
}
// Parse until ; or }
while (true)
{
auto& token = tz.current();
// Check for list end
if (token == list_end && !token.quoted_string)
break;
// Setup value
Property value;
// Detect value type
if (token.quoted_string) // Quoted string
value = token.text;
else if (token == "true") // Boolean (true)
value = true;
else if (token == "false") // Boolean (false)
value = false;
else if (token.isInteger()) // Integer
value = token.asInt();
else if (token.isHex()) // Hex (0xXXXXXX)
value = token.asInt();
else if (token.isFloat()) // Floating point
value = token.asFloat();
else // Unknown, just treat as string
value = token.text;
// Add value
child->values_.push_back(value);
// Check for ,
if (tz.peek() == ',')
tz.adv(); // Skip it
else if (tz.peek() != list_end)
{
logError(tz, fmt::format(R"(Expected "," or "{}", got "{}")", list_end, tz.peek().text));
return false;
}
tz.adv();
}
return true;
}
// -----------------------------------------------------------------------------
// Parses formatted text data. Current valid formatting is:
// (type) child = value;
// (type) child = value1, value2, ...;
// (type) child = { value1, value2, ... }
// (type) child { grandchild = value; etc... }
// (type) child : inherited { ... }
//
// All values are read as strings, but can be retrieved as string, int, bool
// or float.
// -----------------------------------------------------------------------------
bool ParseTreeNode::parse(Tokenizer& tz)
{
// Keep parsing until final } is reached (or end of file)
string name, type;
while (!tz.atEnd() && tz.current() != '}')
{
// Check for preprocessor stuff
if (parser_ && tz.current()[0] == '#')
{
if (!parsePreprocessor(tz))
return false;
tz.advToNextLine();
continue;
}
// If it's a special character (ie not a valid name), parsing fails
if (tz.isSpecialCharacter(tz.current().text[0]))
{
logError(tz, fmt::format("Unexpected special character '{}'", tz.current().text));
return false;
}
// So we have either a node or property name
name = tz.current().text;
type.clear();
if (name.empty())
{
logError(tz, "Unexpected empty string");
return false;
}
// Check for type+name pair
if (tz.peek() != '=' && tz.peek() != '{' && tz.peek() != ';' && tz.peek() != ':')
{
type = name;
name = tz.next().text;
if (name.empty())
{
logError(tz, "Unexpected empty string");
return false;
}
}
// Log::debug(wxString::Format("%s \"%s\", op %s", CHR(type), CHR(name), CHR(tz.current().text)));
// Assignment
if (tz.advIfNext('=', 2))
{
if (!parseAssignment(tz, addChildPTN(name, type)))
return false;
}
// Child node
else if (tz.advIfNext('{', 2))
{
// Parse child node
if (!addChildPTN(name, type)->parse(tz))
return false;
}
// Child node (with no values/children)
else if (tz.advIfNext(';', 2))
{
// Add child node
addChildPTN(name, type);
continue;
}
// Child node + inheritance
else if (tz.advIfNext(':', 2))
{
// Check for opening brace
if (tz.checkNext('{'))
{
// Add child node
auto child = addChildPTN(name, type);
child->inherit_ = tz.current().text;
// Skip {
tz.adv(2);
// Parse child node
if (!child->parse(tz))
return false;
}
else if (tz.checkNext(';')) // Empty child node
{
// Add child node
auto child = addChildPTN(name, type);
child->inherit_ = tz.current().text;
// Skip ;
tz.adv(2);
continue;
}
else
{
logError(tz, fmt::format(R"(Expecting "{{" or ";", got "{}")", tz.next().text));
return false;
}
}
// Unexpected token
else
{
logError(tz, fmt::format("Unexpected token \"{}\"", tz.next().text));
return false;
}
// Continue parsing
tz.adv();
}
// Success
return true;
}
