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ifndef SymbolAsString static WeakHasherMap<Symbol, Bool> symbol_map = new WeakHasherMap(new Hasher<Symbol>() { public int hashCode(Symbol symbol) { ret symbol.text.hashCode(); } public bool equals(Symbol a, Symbol b) { if (a == null) ret b == null; ret b != null && eq(a.text, b.text); } }); endifndef static Symbol symbol(S s) { ifdef SymbolAsString ret s; endifdef ifndef SymbolAsString if (s == null) null; synchronized(symbol_map) { // TODO: avoid object creation by passing the string to findKey Symbol symbol = new(s, true); Symbol existingSymbol = symbol_map.findKey(symbol); if (existingSymbol == null) symbol_map.put(existingSymbol = symbol, true); ifdef symbol_debug if (eqic(s, "Java")) print("Symbol for " + s + ": " + symbolToStringFull(existingSymbol); endifdef ret existingSymbol; } endifndef } static Symbol symbol(CharSequence s) { if (s == null) null; ifdef SymbolAsString ret str(s); endifdef ifndef SymbolAsString if (s instanceof Symbol) ret (Symbol) s; if (s instanceof S) ret symbol((S) s); ret symbol(str(s)); endifndef } static Symbol symbol(O o) { ret symbol((CharSequence) o); }
Began life as a copy of #1010609
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Snippet ID: | #1012686 |
Snippet name: | symbol - make Symbol from String or CharSequence |
Eternal ID of this version: | #1012686/42 |
Text MD5: | e9d6bc4fb0088068d9e1c5b1c6b7b18c |
Transpilation MD5: | ef3a1e38ca2ad4e5a4f0c5eede709c5d |
Author: | stefan |
Category: | javax |
Type: | JavaX fragment (include) |
Public (visible to everyone): | Yes |
Archived (hidden from active list): | No |
Created/modified: | 2021-09-08 03:48:33 |
Source code size: | 1259 bytes / 49 lines |
Pitched / IR pitched: | No / No |
Views / Downloads: | 578 / 1062 |
Version history: | 41 change(s) |
Referenced in: | [show references] |