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Document $, !, @ and # in symbol names #886

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Merged
merged 1 commit into from
Jul 26, 2017
Merged

Document $, !, @ and # in symbol names #886

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1 change: 1 addition & 0 deletions src/util/fresh_symbol.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -41,6 +41,7 @@ symbolt &get_fresh_aux_symbol(

do
{
// Distinguish local variables with the same name
new_symbol.base_name=
basename_prefix+
"$"+
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5 changes: 5 additions & 0 deletions src/util/ssa_expr.cpp
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Expand Up @@ -61,18 +61,23 @@ static void build_ssa_identifier_rec(

if(!l0.empty())
{
// Distinguish different threads of execution
os << '!' << l0;
l1_object_os << '!' << l0;
}

if(!l1.empty())
{
// Distinguish different calls to the same function (~stack frame)
os << '@' << l1;
l1_object_os << '@' << l1;
}

if(!l2.empty())
{
// Distinguish SSA steps for the same variable
os << '#' << l2;
}
}
else
assert(false);
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