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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x | import {CDSAggregate, CDSAnnotation, CDSArithParen, CDSArithmetics, CDSCase, CDSFunction, CDSInteger, CDSName, CDSPrefixedName, CDSString, CDSType} from ".";
import {Expression, optPrio, seq, starPrio, altPrio} from "../../abap/2_statements/combi";
import {IStatementRunnable} from "../../abap/2_statements/statement_runnable";
import {CDSAs} from "./cds_as";
import {CDSCast} from "./cds_cast";
export class CDSElement extends Expression {
public getRunnable(): IStatementRunnable {
const redirected = seq(": REDIRECTED TO", optPrio(altPrio("PARENT", "COMPOSITION CHILD")), CDSName);
const colonThing = seq(":", altPrio(CDSType, CDSName, "LOCALIZED"));
// $extension.* — extension field wildcard
const extensionWildcard = seq("$extension", ".", "*");
const body = altPrio(extensionWildcard,
CDSArithmetics,
CDSAggregate,
CDSString,
CDSArithParen,
CDSFunction,
CDSCast,
CDSCase,
seq("(", CDSCase, ")"),
seq(CDSPrefixedName, optPrio(CDSAs), optPrio(altPrio(redirected, colonThing))),
CDSInteger);
// KEY/VIRTUAL keyword handling via altPrio:
// - Try keyword form first: if keyword consumed but body fails (e.g. "virtual.Field"),
// altPrio backtracks to plain body (which handles "virtual" as a datasource alias prefix).
// - This gives exactly 1 state in all cases (no exponential blowup from opt()).
const elementBody = altPrio(seq(altPrio("KEY", "VIRTUAL"), body), body);
return seq(starPrio(CDSAnnotation), elementBody, optPrio(CDSAs));
}
}
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