static List <ast.Identifier> parseFunctionParameters()
{
List <ast.Identifier> identifiers = new List <ast.Identifier>();
if (peekTokenIs(token.RPAREN))
{
nextToken();
return(identifiers);
}
nextToken();
ast.Identifier ident = new ast.Identifier {
Token = curToken, Value = curToken.Literal
};
identifiers.Add(ident);
while (peekTokenIs(token.COMMA))
{
nextToken();
nextToken();
ident = new ast.Identifier {
Token = curToken, Value = curToken.Literal
};
identifiers.Add(ident);
}
if (!expectPeek(token.RPAREN))
{
return(null);
}
return(identifiers);
}
static Object.Object evalIdentifier(ast.Identifier node, Object.Environment env)
{
Object.Object val = env.Get(node.Value);
if (val != null)
{
return(val);
}
Object.Builtin builtin;
if (evaluator_builtins.builtins.TryGetValue(node.Value, out builtin))
{
return(builtin);
}
return(newError("identifier not found: " + node.Value));;
}
static Object.Macro isMacroCall(ast.CallExpression exp, Object.Environment env)
{
if (!(exp.Function is ast.Identifier))
{
return(null);
}
ast.Identifier identifier = (ast.Identifier)exp.Function;
Object.Object obj = env.Get(identifier.Value);
if (obj == null)
{
return(null);
}
if (!(obj is Object.Macro))
{
return(null);
}
Object.Macro macro = (Object.Macro)obj;
return(macro);
}