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implements https://github.com/nim-lang/RFCs/issues/258 (#15503)

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* implements https://github.com/nim-lang/RFCs/issues/258

* don't be too strict with custom pragma blocks

* cast pragmas: documentation

* added most missing inference query procs to effecttraits.nim
This commit is contained in:
Andreas Rumpf 2020-10-06 16:47:15 +02:00 • committed by GitHub
commit 92163fa330
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16 changed files with 232 additions and 68 deletions
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43
lib/std/effecttraits.nim
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@ -1,7 +1,7 @@
#
#
# Nim's Runtime Library
# (c) Copyright 2018 Nim contributors
# (c) Copyright 2020 Nim contributors
#
# See the file "copying.txt", included in this
# distribution, for details about the copyright.
@ -9,11 +9,46 @@
## This module provides access to the inferred .raises effects
## for Nim's macro system.
## **Since**: Version 1.4.
##
## One can test for the existance of this standard module
## via ``defined(nimHasEffectTraitsModule)``.
import macros
proc getRaisesListImpl(n: NimNode): NimNode = discard "see compiler/vmops.nim"
proc getTagsListImpl(n: NimNode): NimNode = discard "see compiler/vmops.nim"
proc isGcSafeImpl(n: NimNode): bool = discard "see compiler/vmops.nim"
proc hasNoSideEffectsImpl(n: NimNode): bool = discard "see compiler/vmops.nim"
proc getRaisesList*(call: NimNode): NimNode =
expectKind call, nnkCallKinds
result = getRaisesListImpl(call[0])
proc getRaisesList*(fn: NimNode): NimNode =
## Extracts the ``.raises`` list of the func/proc/etc ``fn``.
## ``fn`` has to be a resolved symbol of kind ``nnkSym``. This
## implies that the macro that calls this proc should accept ``typed``
## arguments and not ``untyped`` arguments.
expectKind fn, nnkSym
result = getRaisesListImpl(fn)
proc getTagsList*(fn: NimNode): NimNode =
## Extracts the ``.tags`` list of the func/proc/etc ``fn``.
## ``fn`` has to be a resolved symbol of kind ``nnkSym``. This
## implies that the macro that calls this proc should accept ``typed``
## arguments and not ``untyped`` arguments.
expectKind fn, nnkSym
result = getTagsListImpl(fn)
proc isGcSafe*(fn: NimNode): bool =
## Return true if the func/proc/etc ``fn`` is `gcsafe`.
## ``fn`` has to be a resolved symbol of kind ``nnkSym``. This
## implies that the macro that calls this proc should accept ``typed``
## arguments and not ``untyped`` arguments.
expectKind fn, nnkSym
result = isGcSafeImpl(fn)
proc hasNoSideEffects*(fn: NimNode): bool =
## Return true if the func/proc/etc ``fn`` has `noSideEffect`.
## ``fn`` has to be a resolved symbol of kind ``nnkSym``. This
## implies that the macro that calls this proc should accept ``typed``
## arguments and not ``untyped`` arguments.
expectKind fn, nnkSym
result = hasNoSideEffectsImpl(fn)