public NonTerminal SubprogramHead(SubprogramType subprogramType)
{
var identifier = Identifier();
var parameters = new List <NonTerminal>();
CheckType(TokenType.LeftParenthesis, true);
while (Peek().TokenType != TokenType.RightParenthesis)
{
var declaration = Declaration();
parameters.Add(declaration);
CheckSymbol(TokenType.RightParenthesis, TokenType.Semicolon);
}
Eat();
Type returnType = null;
if (subprogramType == SubprogramType.Function)
{
CheckType(TokenType.Colon, true);
returnType = Type();
}
CheckType(TokenType.Semicolon, true);
return(new SubprogramHead(subprogramType, identifier, parameters, returnType));
}
public NonTerminal Subprogram(SubprogramType type)
{
var subprogramHead = SubprogramHead(type);
var declarations = Declarations();
var compoundStatements = CompoundStatement();
return(new Subprogram(subprogramHead, declarations, compoundStatements));
}
public SubprogramHead(SubprogramType subprogramType, Identifier identifier, List <NonTerminal> parameters,
Type returnType)
{
SubprogramType = subprogramType;
Identifier = identifier;
Parameters = parameters;
ReturnType = returnType;
}
