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implemented optional pragma for implicit discard

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This commit is contained in:
Araq 2011-09-24 13:55:24 +02:00
commit 72ceda98cb
11 changed files with 53 additions and 21 deletions
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11
compiler/pragmas.nim
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@ -23,15 +23,15 @@ const
wMagic, wNosideEffect, wSideEffect, wNoreturn, wDynLib, wHeader,
wCompilerProc, wProcVar, wDeprecated, wVarargs, wCompileTime, wMerge,
wBorrow, wExtern, wImportCompilerProc, wThread, wImportCpp, wImportObjC,
wNoStackFrame, wError}
wNoStackFrame, wError, wOptional}
converterPragmas* = procPragmas
methodPragmas* = procPragmas
macroPragmas* = {FirstCallConv..LastCallConv, wImportc, wExportc, wNodecl,
wMagic, wNosideEffect, wCompilerProc, wDeprecated, wExtern,
wImportcpp, wImportobjc, wError}
wImportcpp, wImportobjc, wError, wOptional}
iteratorPragmas* = {FirstCallConv..LastCallConv, wNosideEffect, wSideEffect,
wImportc, wExportc, wNodecl, wMagic, wDeprecated, wBorrow, wExtern,
wImportcpp, wImportobjc, wError}
wImportcpp, wImportobjc, wError, wOptional}
stmtPragmas* = {wChecks, wObjChecks, wFieldChecks, wRangechecks, wBoundchecks,
wOverflowchecks, wNilchecks, wAssertions, wWarnings, wHints, wLinedir,
wStacktrace, wLinetrace, wOptimization, wHint, wWarning, wError, wFatal,
@ -461,7 +461,7 @@ proc pragma(c: PContext, sym: PSym, n: PNode, validPragmas: TSpecialWords) =
incl(sym.flags, sfRegister)
of wThreadVar:
noVal(it)
incl(sym.flags, sfThreadVar)
incl(sym.flags, sfThread)
of wDeadCodeElim: pragmaDeadCodeElim(c, it)
of wMagic: processMagic(c, it, sym)
of wCompileTime:
@ -553,6 +553,9 @@ proc pragma(c: PContext, sym: PSym, n: PNode, validPragmas: TSpecialWords) =
of wPragma:
processPragma(c, n, i)
break
of wOptional:
noVal(it)
if sym != nil: incl(sym.flags, sfOptional)
of wChecks, wObjChecks, wFieldChecks, wRangechecks, wBoundchecks,
wOverflowchecks, wNilchecks, wAssertions, wWarnings, wHints,
wLinedir, wStacktrace, wLinetrace, wOptimization, wByRef,