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WIP: disallow 'nil' for strings and seqs

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This commit is contained in:
Andreas Rumpf 2018-08-13 11:41:33 +02:00
commit dae5450947
43 changed files with 207 additions and 173 deletions
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21
lib/system.nim
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@ -3963,19 +3963,28 @@ when hasAlloc:
proc safeAdd*[T](x: var seq[T], y: T) {.noSideEffect, deprecated.} =
## Adds ``y`` to ``x`` unless ``x`` is not yet initialized; in that case,
## ``x`` becomes ``@[y]``
if x == nil: x = @[y]
else: x.add(y)
when defined(nimNoNilSeqs):
x.add(y)
else:
if x == nil: x = @[y]
else: x.add(y)
proc safeAdd*(x: var string, y: char) {.noSideEffect, deprecated.} =
## Adds ``y`` to ``x``. If ``x`` is ``nil`` it is initialized to ``""``
if x == nil: x = ""
x.add(y)
when defined(nimNoNilSeqs):
x.add(y)
else:
if x == nil: x = ""
x.add(y)
proc safeAdd*(x: var string, y: string) {.noSideEffect, deprecated.} =
## Adds ``y`` to ``x`` unless ``x`` is not yet initalized; in that
## case, ``x`` becomes ``y``
if x == nil: x = y
else: x.add(y)
when defined(nimNoNilSeqs):
x.add(y)
else:
if x == nil: x = y
else: x.add(y)
proc locals*(): RootObj {.magic: "Plugin", noSideEffect.} =
## generates a tuple constructor expression listing all the local variables