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new minor language feature: .noSideEffect blocks like .gcsafe blocks

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This commit is contained in:
Andreas Rumpf 2018-11-26 23:28:02 +01:00
commit 413580bc04
7 changed files with 30 additions and 12 deletions
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7
compiler/pragmas.nim
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@ -38,7 +38,7 @@ const
wImportc, wExportc, wNodecl, wMagic, wDeprecated, wBorrow, wExtern,
wImportCpp, wImportObjC, wError, wDiscardable, wGensym, wInject, wRaises,
wTags, wLocks, wGcSafe, wExportNims, wUsed}
exprPragmas* = {wLine, wLocks, wNoRewrite, wGcSafe}
exprPragmas* = {wLine, wLocks, wNoRewrite, wGcSafe, wNosideeffect}
stmtPragmas* = {wChecks, wObjChecks, wFieldChecks, wRangechecks,
wBoundchecks, wOverflowchecks, wNilchecks, wMovechecks, wAssertions,
wWarnings, wHints,
@ -855,8 +855,9 @@ proc singlePragma(c: PContext, sym: PSym, n: PNode, i: var int,
sym.flags.incl sfOverriden
of wNosideeffect:
noVal(c, it)
incl(sym.flags, sfNoSideEffect)
if sym.typ != nil: incl(sym.typ.flags, tfNoSideEffect)
if sym != nil:
incl(sym.flags, sfNoSideEffect)
if sym.typ != nil: incl(sym.typ.flags, tfNoSideEffect)
of wSideeffect:
noVal(c, it)
incl(sym.flags, sfSideEffect)