nix-super/tests/lang/eval-okay-redefine-builtin.exp at d9e7c9777cc65847295e50ac5dc6736a99eb9f8d - max/nix-super - The Forge

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Shea Levy 136f2f7046 Add the ExprBuiltin Expr type to the AST

Certain desugaring schemes may require the parser to use some builtin
function to do some of the work (e.g. currently `throw` is used to
lazily cause an error if a `<>`-style path is not in the search path)
Unfortunately, these names are not reserved keywords, so an expression
that uses such a syntactic sugar will not see the expected behavior
(see tests/lang/eval-okay-redefine-builtin.nix for an example).

This adds the ExprBuiltin AST type, which when evaluated uses the value
from the rootmost variable scope (which of course is initialized
internally and can't shadow any of the builtins).

Signed-off-by: Shea Levy <shea@shealevy.com>

2013-12-31 17:45:47 +00:00

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