public override EvalResult Evaluate(MakeState s)
{
if (s.IsDefined(val))
{
return(s.GetDefine(val));
}
else if (s.funcs.ContainsKey(val))
{
return new EvalResult
{
Type = EvalResult.ResultType.Function,
funcval = new FunctionStatement
{
name = val
}
}
}
;
else
{
return new EvalResult()
{
Type = EvalResult.ResultType.Undefined, strval = val, orig_expr = this
}
};
}
public override EvalResult Evaluate(MakeState s)
{
/* First, parse variables in the shell command */
StringBuilder sb = new StringBuilder();
int i = 0;
while (i < val.Length)
{
if (val[i] == '\\' && i < (val.Length - 1))
{
sb.Append(val[i++]);
sb.Append(val[i++]);
}
else if (val[i] == '$')
{
/* Now try and match the largest possible variable we can */
int j = i + 1;
string match = null;
while (j < (val.Length) && val[j] != '$')
{
string test = val.Substring(i + 1, j - i);
if (s.IsDefined(test))
{
match = test;
}
j++;
}
if (match != null)
{
sb.Append(s.GetDefine(match).strval);
i++;
i += match.Length;
}
else
{
sb.Append(val[i++]);
}
}
else
{
sb.Append(val[i++]);
}
}
return(new EvalResult(sb.ToString()));
}
public override Expression.EvalResult Execute(MakeState s)
{
if (s.IsDefined(v) == false)
{
throw new Exception("export: variable " + v + " is not defined in this scope");
}
Expression.EvalResult e = s.GetDefine(v);
s.SetDefine(v, e);
MakeState cur_s = s.parent;
while (cur_s != null)
{
cur_s.SetDefine(v, e);
cur_s = cur_s.parent;
}
return(new Expression.EvalResult(0));
}
public override Expression.EvalResult Execute(MakeState s)
{
// if this is a conditional assign, we don't need to evaluate the RHS
// if the LHS is already assigned
if (assignop == Tokens.ASSIGNIF & tok_name is LabelExpression)
{
var tn = ((LabelExpression)tok_name).val;
if (s.IsDefined(tn))
{
return(new Expression.EvalResult(0));
}
}
Expression.EvalResult e = val.Evaluate(s);
if (tok_name is LabelExpression)
{
var tn = ((LabelExpression)tok_name).val;
s.SetDefine(tn, e, assignop);
if (export)
{
ExportDef(tn, s);
}
}
else if (tok_name is LabelMemberExpression)
{
// left-most member must be a define
var lme = tok_name as LabelMemberExpression;
if (!(lme.label is LabelExpression))
{
throw new Exception("unable to assign to " + tok_name.ToString());
}
var o = s.GetDefine(((LabelExpression)lme.label).val);
// Now iterate through the various members, looking for
// what to set
Expression cur_member_lval = lme.member;
while (true)
{
if (cur_member_lval is LabelExpression)
{
// we've reached the end of the chain
break;
}
else if (cur_member_lval is LabelMemberExpression)
{
var new_lme = cur_member_lval as LabelMemberExpression;
if (!(new_lme.label is LabelExpression))
{
throw new Exception("unable to assign to " + tok_name.ToString());
}
lme = new_lme;
cur_member_lval = lme.member;
if (o.Type != Expression.EvalResult.ResultType.Object)
{
throw new Exception();
}
o = o.objval[((LabelExpression)lme.label).val];
}
else
{
throw new NotImplementedException();
}
}
string member_name = ((LabelExpression)cur_member_lval).val;
o.objval[member_name] = e;
}
else if (tok_name is LabelIndexedExpression)
{
var chain = get_chain(tok_name);
// left-most member must be a define
var lme = chain[0];
if (!(lme is LabelExpression))
{
throw new Exception("unable to assign to " + tok_name.ToString());
}
var o = s.GetDefine(((LabelExpression)lme).val);
// Now iterate through the various members, looking for
// what to set
o = follow_chain(o, chain, 1, chain.Count - 1, s);
if (o.Type != Expression.EvalResult.ResultType.Array)
{
throw new Exception("unable to assign to " + tok_name.ToString());
}
var idx = ((LabelIndexedExpression)tok_name).index.Evaluate(s).AsInt;
// increase the array size as appropriate
if (idx >= o.arrval.Count)
{
o.arrval.Capacity = (int)idx * 3 / 2;
while (idx >= o.arrval.Count)
{
o.arrval.Add(new Expression.EvalResult {
Type = Expression.EvalResult.ResultType.Null
});
}
}
o.arrval[(int)idx] = e;
}
else
{
throw new NotImplementedException();
}
return(new Expression.EvalResult(0));
}