// Parse into function
public int Parse(string[] parts, int start)
{
// If doesn't start with keyword func
if (parts[start] != "context")
{
throw new Exception("Context change starts with '" + parts[start] + "' not 'context'!");
}
start++;
// Get the change in context
change = context + "execute ";
// While hasn't reached code block start
while (parts[start] != "{")
{
// Add change
change += parts[start] + " ";
start++;
}
change += "run ";
// This is impossible
if (parts[start] != "{")
{
throw new Exception("Expected { not " + parts[start]);
}
else
{
// Skip {
start += 1;
// Keep identifying expression until end of function declaration
while (start < parts.Length)
{
if (parts[start] == "}")
{
return(start + 1);
}
// Identify from function context
IntoAST.IdentifyResponse ir = IntoAST.Identify("function", change, parts, start);
// Move to next statement and add function child to todo
start = ir.next;
if (ir.IChild is IChildFunctionDeclaration icfd)
{
todo.Add(icfd);
}
else
{
throw new Exception("Context child '" + ir.IChild + "' cannot follow context change '" + change + "'");
}
}
// Didn't find end of function
throw new Exception("No } found for context change " + change);
}
}
// Parse into function
public int Parse(string[] parts, int start)
{
// Set compilation time context
string currContext = context;
// If doesn't start with keyword func
if (parts[start] != "func")
{
throw new Exception("Func starts with '" + parts[start] + "' not 'func'!");
}
// If the name is already taken
else if (Reserved.Exists(parts[start + 1], true))
{
throw new Exception("Name " + parts[start + 1] + " already exists!");
}
else if (parts[start + 2] != "{")
{
throw new Exception("Expected { not " + parts[start + 2]);
}
else
{
// Save function name
funcName = parts[start + 1];
Reserved.fEx.Add(this);
// Skip to first expression
start += 3;
// Keep identifying expression until end of function declaration
while (start < parts.Length)
{
if (parts[start] == "}")
{
return(start + 1);
}
// Identify from function context
IntoAST.IdentifyResponse ir = IntoAST.Identify("function", currContext, parts, start);
// Move to next statement and add function child to todo
start = ir.next;
if (ir.IChild is IChildFunctionDeclaration icfd)
{
todo.Add(icfd);
}
else
{
throw new Exception("Function child '" + ir.IChild + "' cannot follow function '" + funcName + "'");
}
}
// Didn't find end of function
throw new Exception("No } found for function " + funcName);
}
}
// Parses the variable assignation
public int Parse(string[] parts, int start)
{
// Variable is not declared
if (!Reserved.dEx.Exists(p => p.desigName == parts[start]))
{
throw new Exception("Desig '" + parts[start] + "' is not declared!");
}
// The second part is not proper assigning operator
else if (!desigOps.Contains(parts[start + 1]))
{
throw new Exception("Desig assignation has improper assigning operator '" + parts[start + 1] + "'!");
}
// Get expression
else
{
// Save operator
op = parts[start + 1];
// Save desig
desig = Reserved.dEx.Find(d => d.desigName == parts[start]);
// Identify type
IntoAST.IdentifyResponse ir = IntoAST.Identify("desig expression", context, parts, start + 2);
// Check type
if (ir.IChild is IChildDesigAssignation icda)
{
// Move to next
start = ir.next;
exp = icda;
}
else
{
throw new Exception("Invalid desig subexpression '" + ir.IChild + "'");
}
// Return index after expression
return(start);
}
}
// Parses the variable assignation
public int Parse(string[] parts, int start)
{
// Variable is not declared
if (!Reserved.vEx.Exists(p => p.varName == parts[start]))
{
throw new Exception("Variable '" + parts[start] + "' is not declared!");
}
// The second part is not proper assigning operator
else if (!assignOps.Contains(parts[start + 1]))
{
throw new Exception("Variable assignation has improper assigning operator\t\tFormat: [varname] [=, +=, -=, *=, /=, or %=] [const or literal integer] ;!");
}
// Get expression
else
{
// Save operator
op = parts[start + 1];
// Save Variable
var = Reserved.vEx.Find(v => v.varName == parts[start]);
// Identify type
IntoAST.IdentifyResponse ir = IntoAST.Identify("variable expression", context, parts, start + 2);
// Check type
if (ir.IChild is IChildVariableAssignation icva)
{
// Move to next
start = ir.next;
exp = icva;
}
else
{
throw new Exception("Invalid variable subexpression '" + ir.IChild + "'");
}
// Return index after expression
return(start);
}
}