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.cursor implementation (#12637)

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* cursors: first implementation
* added currently failing test
* .cursor works for doubly linked lists
* make -d:useMalloc work again
* added code to nil out refs in a destructor
* it's now called --gc:arc
* renderer.nim: render nkBreakState properly
* make simple closure iterators work without leaking
This commit is contained in:
Andreas Rumpf 2019-11-12 15:05:36 +01:00 • committed by GitHub
commit dfb020b174
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12 changed files with 106 additions and 36 deletions
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7
compiler/pragmas.nim
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@ -62,11 +62,11 @@ const
wInheritable, wGensym, wInject, wRequiresInit, wUnchecked, wUnion, wPacked,
wBorrow, wGcSafe, wPartial, wExplain, wPackage}
fieldPragmas* = declPragmas + {
wGuard, wBitsize} - {wExportNims, wNodecl} # why exclude these?
wGuard, wBitsize, wCursor} - {wExportNims, wNodecl} # why exclude these?
varPragmas* = declPragmas + {wVolatile, wRegister, wThreadVar,
wMagic, wHeader, wCompilerProc, wCore, wDynlib,
wNoInit, wCompileTime, wGlobal,
wGensym, wInject, wCodegenDecl, wGuard, wGoto}
wGensym, wInject, wCodegenDecl, wGuard, wGoto, wCursor}
constPragmas* = declPragmas + {wHeader, wMagic,
wGensym, wInject,
wIntDefine, wStrDefine, wBoolDefine, wCompilerProc, wCore}
@ -833,6 +833,9 @@ proc singlePragma(c: PContext, sym: PSym, n: PNode, i: var int,
of wVolatile:
noVal(c, it)
incl(sym.flags, sfVolatile)
of wCursor:
noVal(c, it)
incl(sym.flags, sfCursor)
of wRegister:
noVal(c, it)
incl(sym.flags, sfRegister)