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LLL: add UNSET to remove a variable

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This commit is contained in:
Alex Beregszaszi 2017-07-04 19:50:51 +02:00
parent 2c6e1888eb
commit dcfa5f4ea0
1 changed files with 10 additions and 0 deletions
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10
liblll/CodeFragment.cpp
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@ -259,6 +259,7 @@ void CodeFragment::constructOperation(sp::utree const& _t, CompilerState& _s)
} }
else if (us == "SET") else if (us == "SET")
{ {
// TODO: move this to be a stack variable (and not a memory variable)
if (_t.size() != 3) if (_t.size() != 3)
error<IncorrectParameterCount>(us); error<IncorrectParameterCount>(us);
int c = 0; int c = 0;
@ -268,6 +269,15 @@ void CodeFragment::constructOperation(sp::utree const& _t, CompilerState& _s)
m_asm.append((u256)varAddress(firstAsString(), true)); m_asm.append((u256)varAddress(firstAsString(), true));
m_asm.append(Instruction::MSTORE); m_asm.append(Instruction::MSTORE);
} }
else if (us == "UNSET")
{
// TODO: this doesn't actually free up anything, since it is a memory variable (see "SET")
if (_t.size() != 2)
error<IncorrectParameterCount>();
auto it = _s.vars.find(firstAsString());
if (it != _s.vars.end())
_s.vars.erase(it);
}
else if (us == "GET") else if (us == "GET")
{ {
if (_t.size() != 2) if (_t.size() != 2)