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Replace tfHasRequiresInit with a more accurate mechanism

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The new mechanism can deal with more complex scenarios such as
not nil field appearing in a non-default case object branch or
a field within a generic object that may depend on a when branch.

The commit also plugs another hole: the user is no longer able
to create illegal default values through seq.setLen(N).
This commit is contained in:
Zahary Karadjov 2020-03-30 18:56:03 +03:00 • committed by Andreas Rumpf
commit ce9a4ed124
11 changed files with 179 additions and 43 deletions
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compiler/semdata.nim
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@ -103,6 +103,7 @@ type
semExpr*: proc (c: PContext, n: PNode, flags: TExprFlags = {}): PNode {.nimcall.}
semTryExpr*: proc (c: PContext, n: PNode, flags: TExprFlags = {}): PNode {.nimcall.}
semTryConstExpr*: proc (c: PContext, n: PNode): PNode {.nimcall.}
computeRequiresInit*: proc (c: PContext, t: PType): bool {.nimcall.}
semOperand*: proc (c: PContext, n: PNode, flags: TExprFlags = {}): PNode {.nimcall.}
semConstBoolExpr*: proc (c: PContext, n: PNode): PNode {.nimcall.} # XXX bite the bullet
semOverloadedCall*: proc (c: PContext, n, nOrig: PNode,