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Detect when switches are specified more than once

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Fixes #1219
This commit is contained in:
Maxime Coste 2017-02-15 18:55:11 +00:00
parent 9e0f085b86
commit 0a1cb4b9b1
1 changed files with 6 additions and 0 deletions
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6
src/parameters_parser.cc
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@ -19,6 +19,7 @@ ParametersParser::ParametersParser(ParameterList params,
m_desc(desc)
{
bool only_pos = desc.flags & ParameterDesc::Flags::SwitchesAsPositional;
Vector<bool> switch_seen(desc.switches.size(), false);
for (size_t i = 0; i < params.size(); ++i)
{
if (not only_pos and params[i] == "--")
@ -29,6 +30,11 @@ ParametersParser::ParametersParser(ParameterList params,
if (it == m_desc.switches.end())
throw unknown_option(params[i]);
auto switch_index = it - m_desc.switches.begin();
if (switch_seen[switch_index])
throw runtime_error{format("switch '-{}' specified more than once", it->key)};
switch_seen[switch_index] = true;
if (it->value.takes_arg)
{
++i;