deuterium 0.0.1 

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use placeholder::{
    Placeholder
};

use sql::{SqlContext, ToSql};
use sql::value::{ToPredicateValue};

impl ToPredicateValue for Placeholder {
    fn to_predicate_value(&self, ctx: &mut SqlContext) -> String {
        ctx.expl_indexed_placeholder(self.idx);
        ctx.adapter().placeholder(self.idx)
    }
}

impl ToSql for Placeholder {
    fn to_sql(&self, ctx: &mut SqlContext) -> String {
        self.to_predicate_value(ctx)
    }
}