Alt - union type [now called Either] [1009167]

17
LINES

< > BotCompany Repo | #1009167 // Alt - union type [now called Either]

JavaX fragment (include)

sclass Alt<A, B> {
  byte which;
  O value;
  
  *() {}
  *(int which, O *value) { this.which = (byte) which; }
  
  bool isA() { ret which == 1; }
  bool isB() { ret which == 2; }
  
  A a() { if (which != 1) _failMe(); ret (A) value; }
  B b() { if (which != 2) _failMe(); ret (B) value; }
  
  void _failMe {
    fail("Alt object is of wrong type: " + shortClassName(value));
  }
}

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Snippet ID:	#1009167
Snippet name:	Alt - union type [now called Either]
Eternal ID of this version:	#1009167/4
Text MD5:	e1c5d3e033c4dd1c1afd719d74baa533
Author:	stefan
Category:	javax
Type:	JavaX fragment (include)
Public (visible to everyone):	Yes
Archived (hidden from active list):	No
Created/modified:	2017-07-12 13:28:58
Source code size:	400 bytes / 17 lines
Pitched / IR pitched:	No / No
Views / Downloads:	717 / 1319
Version history:	3 change(s)
Referenced in:	[show references]

1	sclass Alt<A, B> {
2	byte which;
3	O value;
4
5	*() {}
6	(int which, O value) { this.which = (byte) which; }
7
8	bool isA() { ret which == 1; }
9	bool isB() { ret which == 2; }
10
11	A a() { if (which != 1) _failMe(); ret (A) value; }
12	B b() { if (which != 2) _failMe(); ret (B) value; }
13
14	void _failMe {
15	fail("Alt object is of wrong type: " + shortClassName(value));
16	}
17	}