private void ExecuteWhileStmt(Ast.WhileStmt stmt, ScriptEnv env)
{
long condition;
do
{
condition = EvaluateExpr <long>(stmt.Condition, env);
if (condition == 1)
{
ExecuteBlock(stmt.Block, env);
if (env.DidReturn)
{
return;
}
else if (env.DidBreak)
{
env.DidBreak = false;
break;
}
else if (env.DidContinue)
{
env.DidContinue = false;
}
}
else if (condition != 0)
{
throw new ScriptException(
$"Evaluation of WHILE condition expression \"{stmt.Condition.Sql}\" " +
$"produced a value of {condition} instead of the expected 0 or 1.");
}
} while (condition == 1);
}
private Ast.Stmt ParseWhileStmt(TokenQueue q)
{
var stmt = new Ast.WhileStmt {
SourceToken = q.SourceToken
};
q.Take("while");
stmt.Condition = ParseExpr(q);
stmt.Block = ParseBlock(q);
ConsumeSemicolon(q);
return(stmt);
}