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Improved error messages for incorrect arguments

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This commit is contained in:
hbristow 2013-08-30 15:48:20 +10:00
parent a780c3a7d1
commit 25ee1f9099
1 changed files with 23 additions and 0 deletions
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23
modules/matlab/include/opencv2/matlab/mxarray.hpp
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@ -475,6 +475,7 @@ public:
* if (arguments.variantIs("elementwise")) {
* // call elementwise sum()
* }
* \endcode
*/
class ArgumentParser {
private:
@ -550,12 +551,34 @@ private:
return valid_;
}
String toString(const String& method_name="f") const {
int req_begin = 0, req_end = 0, opt_begin = 0, opt_end = 0;
std::ostringstream s;
// f(...)
s << method_name << "(";
// required arguments
req_begin = s.str().size();
for (size_t n = 0; n < Nreq_; ++n) { s << "src" << n+1 << (n != Nreq_-1 ? ", " : ""); }
req_end = s.str().size();
if (Nreq_ && Nopt_) s << ", ";
// optional arguments
opt_begin = s.str().size();
for (size_t n = 0; n < keys_.size(); ++n) { s << "'" << keys_[n] << "', " << keys_[n] << (n != Nopt_-1 ? ", " : ""); }
opt_end = s.str().size();
s << ");";
if (Nreq_ + Nopt_ == 0) return s.str();
// underscores
String under = String(req_begin, ' ') + String(req_end-req_begin, '-')
+ String(std::max(opt_begin-req_end,0), ' ') + String(opt_end-opt_begin, '-');
s << "\n" << under;
// required and optional sets
String req_set(req_end-req_begin, ' ');
String opt_set(opt_end-opt_begin, ' ');
if (!req_set.empty() && req_set.size() < 8) req_set.replace((req_set.size()-3)/2, 3, "req");
if (req_set.size() > 7) req_set.replace((req_set.size()-8)/2, 8, "required");
if (!opt_set.empty() && opt_set.size() < 8) opt_set.replace((opt_set.size()-3)/2, 3, "opt");
if (opt_set.size() > 7) opt_set.replace((opt_set.size()-8)/2, 8, "optional");
String set = String(req_begin, ' ') + req_set + String(std::max(opt_begin-req_end,0), ' ') + opt_set;
s << "\n" << set;
return s.str();
}
};