public static Stmt StmtFromStmtContext(LatteParser.StmtContext context)
{
return(context switch
{
LatteParser.AssContext assContext => new Ass(assContext),
LatteParser.BlockStmtContext blockStmtContext => new Block(blockStmtContext),
LatteParser.CondContext condContext => new Cond(condContext),
LatteParser.CondElseContext condElseContext => new CondElse(condElseContext),
LatteParser.DeclContext declContext => new Decl(declContext),
LatteParser.DecrContext decrContext => new Decr(decrContext),
LatteParser.EmptyContext _ => new Empty(),
LatteParser.IncrContext incrContext => new Incr(incrContext),
LatteParser.RetContext retContext => new Ret(retContext),
LatteParser.SExpContext sExpContext => new ExpStmt(sExpContext),
LatteParser.StructAssContext structAssContext => new StructAss(structAssContext),
LatteParser.StructDecrContext structDecrContext => new StructDecr(structDecrContext),
LatteParser.StructIncrContext structIncrContext => new StructIncr(structIncrContext),
LatteParser.VRetContext vRetContext => new Ret(vRetContext),
LatteParser.WhileContext whileContext => new While(whileContext),
_ => throw new ArgumentOutOfRangeException(nameof(context))
});
public override void EnterAss(LatteParser.AssContext context)
{
var id = context.ID().GetText();
if (!_environment.NameToVarDef.ContainsKey(id))
{
StateUtils.InterruptWithMessage(
context.start.Line,
context.ID().Symbol.Column,
ErrorMessages.VarNotDefined(id));
}
var variable = _environment.NameToVarDef[id];
var exprType = new ExpressionTypeVisitor().Visit(context.expr());
if (!variable.Type.Equals(exprType) && !IsTypeParent(exprType, variable.Type))
{
StateUtils.InterruptWithMessage(
context.start.Line,
context.ID().Symbol.Column,
ErrorMessages.VarExprTypesMismatch(id));
}
}
public override bool VisitAss(LatteParser.AssContext context)
{
return(false);
}
public Ass(LatteParser.AssContext context)
{
Id = context.ID().GetText();
Expr = Exprs.Utils.ExprFromExprContext(context.expr());
}
