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new feature: .used pragma to suppress declared-but-not-used warning

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This commit is contained in:
Araq 2017-02-17 18:03:56 +01:00
commit 8f426b974a
5 changed files with 51 additions and 10 deletions
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20
compiler/pragmas.nim
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@ -25,19 +25,19 @@ const
wBorrow, wExtern, wImportCompilerProc, wThread, wImportCpp, wImportObjC,
wAsmNoStackFrame, wError, wDiscardable, wNoInit, wDestructor, wCodegenDecl,
wGensym, wInject, wRaises, wTags, wLocks, wDelegator, wGcSafe,
wOverride, wConstructor, wExportNims}
wOverride, wConstructor, wExportNims, wUsed}
converterPragmas* = procPragmas
methodPragmas* = procPragmas+{wBase}-{wImportCpp}
templatePragmas* = {wImmediate, wDeprecated, wError, wGensym, wInject, wDirty,
wDelegator, wExportNims}
wDelegator, wExportNims, wUsed}
macroPragmas* = {FirstCallConv..LastCallConv, wImmediate, wImportc, wExportc,
wNodecl, wMagic, wNosideeffect, wCompilerproc, wDeprecated, wExtern,
wImportCpp, wImportObjC, wError, wDiscardable, wGensym, wInject, wDelegator,
wExportNims}
wExportNims, wUsed}
iteratorPragmas* = {FirstCallConv..LastCallConv, wNosideeffect, wSideeffect,
wImportc, wExportc, wNodecl, wMagic, wDeprecated, wBorrow, wExtern,
wImportCpp, wImportObjC, wError, wDiscardable, wGensym, wInject, wRaises,
wTags, wLocks, wGcSafe, wExportNims}
wTags, wLocks, wGcSafe, wExportNims, wUsed}
exprPragmas* = {wLine, wLocks, wNoRewrite, wGcSafe}
stmtPragmas* = {wChecks, wObjChecks, wFieldChecks, wRangechecks,
wBoundchecks, wOverflowchecks, wNilchecks, wAssertions, wWarnings, wHints,
@ -55,16 +55,16 @@ const
wPure, wHeader, wCompilerproc, wFinal, wSize, wExtern, wShallow,
wImportCpp, wImportObjC, wError, wIncompleteStruct, wByCopy, wByRef,
wInheritable, wGensym, wInject, wRequiresInit, wUnchecked, wUnion, wPacked,
wBorrow, wGcSafe, wExportNims, wPartial}
wBorrow, wGcSafe, wExportNims, wPartial, wUsed}
fieldPragmas* = {wImportc, wExportc, wDeprecated, wExtern,
wImportCpp, wImportObjC, wError, wGuard, wBitsize}
wImportCpp, wImportObjC, wError, wGuard, wBitsize, wUsed}
varPragmas* = {wImportc, wExportc, wVolatile, wRegister, wThreadVar, wNodecl,
wMagic, wHeader, wDeprecated, wCompilerproc, wDynlib, wExtern,
wImportCpp, wImportObjC, wError, wNoInit, wCompileTime, wGlobal,
wGensym, wInject, wCodegenDecl, wGuard, wGoto, wExportNims}
wGensym, wInject, wCodegenDecl, wGuard, wGoto, wExportNims, wUsed}
constPragmas* = {wImportc, wExportc, wHeader, wDeprecated, wMagic, wNodecl,
wExtern, wImportCpp, wImportObjC, wError, wGensym, wInject, wExportNims,
wIntDefine, wStrDefine}
wIntDefine, wStrDefine, wUsed}
letPragmas* = varPragmas
procTypePragmas* = {FirstCallConv..LastCallConv, wVarargs, wNosideeffect,
wThread, wRaises, wLocks, wTags, wGcSafe}
@ -961,6 +961,10 @@ proc singlePragma(c: PContext, sym: PSym, n: PNode, i: int,
sym.magic = mIntDefine
of wStrDefine:
sym.magic = mStrDefine
of wUsed:
noVal(it)
if sym == nil: invalidPragma(it)
else: sym.flags.incl sfUsed
else: invalidPragma(it)
else: invalidPragma(it)