public DekiScriptExpression Visit(DekiScriptAssign expr, DekiScriptExpressionEvaluationState state)
{
DekiScriptExpression result = expr.Value.VisitWith(this, state);
DekiScriptLiteral value = (result is DekiScriptLiteral) ? (DekiScriptLiteral)result : DekiScriptUnknown.Value;
if (expr.Define)
{
state.Env.Vars.Add(expr.Variable, value);
}
else
{
state.Env.Vars[expr.Variable] = value;
}
if (result is DekiScriptLiteral)
{
// NOTE: variable was assigned a value; it will be substituted into subsequent operations
return(DekiScriptNil.Value);
}
if (expr.Define)
{
return(DekiScriptExpression.VarStatement(expr.Location, DekiScriptExpression.Id(expr.Location, expr.Variable), result));
}
return(DekiScriptExpression.LetStatement(expr.Location, DekiScriptExpression.Id(expr.Location, expr.Variable), result));
}
public DekiScriptOutputBuffer.Range Visit(DekiScriptAssign expr, DekiScriptExpressionEvaluationState state)
{
if (expr.Define)
{
state.Env.Vars.Add(expr.Variable, state.Pop(expr.Value.VisitWith(this, state)));
}
else
{
state.Env.Vars[expr.Variable] = state.Pop(expr.Value.VisitWith(this, state));
}
return(DekiScriptOutputBuffer.Range.Empty);
}
public DekiScriptLiteral Visit(DekiScriptAssign expr, DekiScriptEnv env)
{
if (expr.Define)
{
env.Locals.Add(expr.Variable, expr.Value.VisitWith(this, env));
}
else
{
env.Locals[expr.Variable] = expr.Value.VisitWith(this, env);
}
return(DekiScriptNil.Value);
}
public DekiScriptExpression Visit(DekiScriptAssign expr, DekiScriptOptimizerState state)
{
DekiScriptExpression result = expr.Value.VisitWith(this, state);
DekiScriptLiteral value = (result is DekiScriptLiteral) ? (DekiScriptLiteral)result : DekiScriptUnknown.Value;
if (expr.Define)
{
state.Env.Locals.Add(expr.Variable, value);
}
else
{
state.Env.Locals[expr.Variable] = value;
}
if (result is DekiScriptLiteral)
{
// NOTE: variable was assigned a value; it will be substituted into subsequent operations
return(DekiScriptNil.Value);
}
return(new DekiScriptAssign(expr.Line, expr.Column, expr.Variable, result, expr.Define));
}
