Function pruneOptionalMapEntries

cel/folding.go:315–357

(ctx *OptimizerContext, e ast.Expr)

}

func pruneOptionalMapEntries(ctx *OptimizerContext, e ast.Expr) {
	m := e.AsMap()
	entries := m.Entries()
	updatedEntries := []ast.EntryExpr{}
	modified := false
	for _, e := range entries {
		entry := e.AsMapEntry()
		key := entry.Key()
		val := entry.Value()
		// If the entry is not optional, or the value-side of the optional hasn't
		// been resolved to a literal, then preserve the entry as-is.
		if !entry.IsOptional() || val.Kind() != ast.LiteralKind {
			updatedEntries = append(updatedEntries, e)
			continue
		}
		optElemVal, ok := val.AsLiteral().(*types.Optional)
		if !ok {
			updatedEntries = append(updatedEntries, e)
			continue
		}
		// When the key is not a literal, but the value is, then it needs to be
		// restored to an optional value.
		if key.Kind() != ast.LiteralKind {
			undoOptVal, err := adaptLiteral(ctx, optElemVal)
			if err != nil {
				ctx.ReportErrorAtID(val.ID(), "invalid map value literal %v: %v", optElemVal, err)
			}
			ctx.UpdateExpr(val, undoOptVal)
			updatedEntries = append(updatedEntries, e)
			continue
		}
		modified = true
		if !optElemVal.HasValue() {
			continue
		}
		ctx.UpdateExpr(val, ctx.NewLiteral(optElemVal.GetValue()))
		updatedEntry := ctx.NewMapEntry(key, val, false)
		updatedEntries = append(updatedEntries, updatedEntry)
	}
	if modified {
		ctx.UpdateExpr(e, ctx.NewMap(updatedEntries))
	}
}

func pruneOptionalStructFields(ctx *OptimizerContext, e ast.Expr) {
	s := e.AsStruct()