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< > BotCompany Repo | #1031595 // tempSetField_conservativeUndo

JavaX fragment (include) [tags: use-pretranspiled]

Libraryless. Click here for Pure Java version (2904L/17K).

static AutoCloseable tempSetField_conservativeUndo(O o, S field, O value) {
  fO oldValue = get(o, field);
  set(o, field, value);
  ret () -> { if (eq(get(o, field), value)) set(o, field, oldValue); };
}

static <A> AutoCloseable tempSetField_conservativeUndo(ISetAndGet<A> gs, A value) {
  if (gs == null) null; // convenient null propagation as always in JavaX!
  A oldValue = gs!;
  gs.set(value);
  ret () -> { if (eq(gs!, value)) gs.set(oldValue); };
}

static <A> AutoCloseable tempSetField_conservativeUndo(A value, ISetAndGet<A> gs) {
  ret tempSetField(gs, value);
}

Author comment

Began life as a copy of #1016243

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Travelled to 4 computer(s): bhatertpkbcr, mqqgnosmbjvj, pyentgdyhuwx, vouqrxazstgt

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Snippet ID: #1031595
Snippet name: tempSetField_conservativeUndo
Eternal ID of this version: #1031595/1
Text MD5: ac36ebeb86fdf7a97fc9dcea6b5634ab
Transpilation MD5: cee8da2634f5fa620289e30ce5324ed3
Author: stefan
Category: javax
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2021-06-22 07:52:21
Source code size: 591 bytes / 16 lines
Pitched / IR pitched: No / No
Views / Downloads: 145 / 215
Referenced in: #1006654 - Standard functions list 2 (LIVE, continuation of #761)