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GAP: add and use ReplaceBinding helper #1085

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merged 1 commit into from
Dec 17, 2024
Merged

GAP: add and use ReplaceBinding helper #1085

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5 changes: 1 addition & 4 deletions gap/exec.g
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Original file line number Diff line number Diff line change
@@ -1,4 +1 @@
BindGlobal("_ORIG_ExecuteProcess", ExecuteProcess);
MakeReadWriteGlobal("ExecuteProcess");
ExecuteProcess := Julia.GAP.GAP_ExecuteProcess;
MakeReadOnlyGlobal("ExecuteProcess");
ReplaceBinding("ExecuteProcess", Julia.GAP.GAP_ExecuteProcess);
17 changes: 17 additions & 0 deletions gap/systemfile.g
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Original file line number Diff line number Diff line change
@@ -1,3 +1,20 @@
# Helper for replacing a GAP global variable or function by a new value.
# The original value is retained under the name `_ORIG_***`
BIND_GLOBAL("ReplaceBinding", function(name, val)
local orig_name;
# Store a copy of the original value, but only if that copy does not yet
# exist. This ensures we don't overwrite it during a call to `Reread`.
orig_name := "_ORIG_";
APPEND_LIST_INTR(orig_name, name);
if not ISB_GVAR(orig_name) then
ASS_GVAR(orig_name, VAL_GVAR(name));
MakeReadOnlyGVar(orig_name);
fi;
MakeReadWriteGVar(name);
ASS_GVAR(name, val);
MakeReadOnlyGVar(name);
end);

(function()
local deps;

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