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8f9348ee53
Like `set` and `read` before it, `eval` can be used to set variables, and so it can't be shadowed by a function without loss of functionality. So this forbids it. Incidentally, this means we will no longer try to autoload an `eval.fish` file that's left over from an old version, which would have helped with #8963.
85 lines
1.7 KiB
Fish
85 lines
1.7 KiB
Fish
# RUN: %fish %s
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# Regression test for issue #4443
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eval set -l previously_undefined foo
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echo $previously_undefined
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# CHECK: foo
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# Test redirection
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eval "echo you can\\'t see this 1>&2" 2>/dev/null
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# Test return statuses
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false
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eval true
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echo $status
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# CHECK: 0
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false
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eval false
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echo $status
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# CHECK: 1
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# Test return status in case of parsing error
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false
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eval "("
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echo $status
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# CHECK: 123
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# CHECKERR: {{.*}}checks/eval.fish (line {{\d+}}): Unexpected end of string, expecting ')'
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# CHECKERR: (
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# CHECKERR: ^
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false
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eval '""'
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echo $status
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# CHECK: 123
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# CHECKERR: {{.*}}checks/eval.fish (line {{\d+}}): The expanded command was empty.
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# CHECKERR: ""
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# CHECKERR: ^
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function empty
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end
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# Regression tests for issue #5692
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false
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eval
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echo blank eval: $status # 0
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# CHECK: blank eval: 0
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false
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eval ""
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echo empty arg eval: $status # 0
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# CHECK: empty arg eval: 0
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false
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eval empty
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echo empty function eval $status # 0
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# CHECK: empty function eval 0
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false
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eval "begin; end;"
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echo empty block eval: $status # 0
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# CHECK: empty block eval: 0
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source /banana/\t/foo
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# CHECKERR: source: Error encountered while sourcing file '/banana/\t/foo':
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# CHECKERR: source: No such file or directory
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# See that eval can't be defined as a function
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function eval
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builtin eval $argv
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end
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# CHECKERR: checks/eval.fish (line {{\d+}}): function: eval: cannot use reserved keyword as function name
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# CHECKERR: function eval
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# CHECKERR: ^
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function evil --no-scope-shadowing
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eval $argv
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end
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# And this is why we do this: `eval` *can't* be cleanly shadowed with a function,
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# because that would always introduce a new block or at the very least clobber $argv.
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eval set -l argv this works
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echo $argv
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# CHECK: this works
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evil set -l argv this does not
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echo $argv
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# CHECK: this works
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