statements at.ts

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100% Branches 1/1

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100% Lines 22/22

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1x import {IStatement} from "./_statement";
import {seq, alt, opt, regex, altPrio} from "../combi";
import {SourceFieldSymbol, FieldSub, Dynamic, FieldLength, FieldOffset} from "../expressions";
import {IStatementRunnable} from "../statement_runnable";
 
export class At implements IStatement {
 
  public getMatcher(): IStatementRunnable {
    const field = alt(seq(FieldSub, opt(FieldOffset), opt(FieldLength)),
                      Dynamic,
                      SourceFieldSymbol);
 
    const atNew = seq("NEW", field);
    const atEnd = seq("END OF", field);
    const group = regex(/^\w+$/);
 
    const ret = seq("AT", altPrio(atNew, atEnd, group));
 
    return ret;
  }
 
}