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REPL: make UndefVarError aware of imported modules #55932

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Oct 2, 2024
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REPL: make UndefVarError aware of imported modules #55932

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35616c6
make UndefVarError aware of imported modules
IanButterworth Sep 29, 2024
d25c7f1
use isdefined
IanButterworth Sep 29, 2024
0984e42
suggestions
IanButterworth Oct 1, 2024
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4 changes: 2 additions & 2 deletions base/experimental.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -319,9 +319,9 @@ function show_error_hints(io, ex, args...)
for handler in hinters
try
@invokelatest handler(io, ex, args...)
catch err
catch
tn = typeof(handler).name
@error "Hint-handler $handler for $(typeof(ex)) in $(tn.module) caused an error"
@error "Hint-handler $handler for $(typeof(ex)) in $(tn.module) caused an error" exception=current_exceptions()
end
end
end
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12 changes: 11 additions & 1 deletion stdlib/REPL/src/REPL.jl
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Expand Up @@ -74,7 +74,17 @@ end
function _UndefVarError_warnfor(io::IO, m::Module, var::Symbol)
Base.isbindingresolved(m, var) || return false
(Base.isexported(m, var) || Base.ispublic(m, var)) || return false
print(io, "\nHint: a global variable of this name also exists in $m.")
active_mod = Base.active_module()
print(io, "\nHint: ")
if isdefined(active_mod, Symbol(m))
print(io, "a global variable of this name also exists in $m.")
else
if Symbol(m) == var
print(io, "$m is loaded but not imported in the active module $active_mod.")
else
print(io, "a global variable of this name may be made accessible by importing $m in the current active module $active_mod")
end
end
return true
end

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