9e9f25b566
double has been disabled, because I am no longer packaging the gdtoa library with Ledger (because double conversion really has nothing to do with what Ledger does). If you wish to use it, you can find gdtoa in cpp-rewrite-2006, under a sub-directory of the same name.
133 lines
3.1 KiB
C++
133 lines
3.1 KiB
C++
#ifndef _ERROR_H
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#define _ERROR_H
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#include <exception>
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#include <stdexcept>
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#include <string>
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#include <cstring>
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#include <sstream>
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#include <list>
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namespace ledger {
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class error_context
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{
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public:
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string desc;
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error_context(const string& _desc) throw() : desc(_desc) {}
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virtual ~error_context() throw() {}
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virtual void describe(std::ostream& out) const throw() {
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if (! desc.empty())
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out << desc << std::endl;
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}
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};
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class file_context : public error_context
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{
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protected:
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path file;
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unsigned long line;
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public:
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file_context(const path& _file, unsigned long _line,
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const string& desc = "") throw()
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: error_context(desc), file(_file), line(_line) {}
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virtual ~file_context() throw() {}
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virtual void describe(std::ostream& out) const throw() {
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if (! desc.empty())
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out << desc << " ";
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out << "\"" << file << "\", line " << line << ": ";
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}
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};
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class line_context : public error_context
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{
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public:
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string line;
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long pos;
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line_context(const string& _line, long _pos,
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const string& desc = "") throw()
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: error_context(desc), line(_line), pos(_pos) {}
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virtual ~line_context() throw() {}
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virtual void describe(std::ostream& out) const throw() {
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if (! desc.empty())
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out << desc << std::endl;
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out << " " << line << std::endl << " ";
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long idx = pos < 0 ? line.length() - 1 : pos;
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for (int i = 0; i < idx; i++)
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out << " ";
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out << "^" << std::endl;
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}
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};
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//////////////////////////////////////////////////////////////////////
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class str_exception : public std::logic_error
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{
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public:
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std::list<error_context *> context;
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str_exception(const string& why,
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error_context * ctxt = NULL) throw()
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: std::logic_error(why) {
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if (ctxt)
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context.push_back(ctxt);
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}
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virtual ~str_exception() throw() {
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for (std::list<error_context *>::iterator i = context.begin();
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i != context.end();
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i++)
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checked_delete(*i);
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}
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virtual void reveal_context(std::ostream& out,
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const string& kind) const throw() {
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for (std::list<error_context *>::const_reverse_iterator i =
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context.rbegin();
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i != context.rend();
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i++) {
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std::list<error_context *>::const_reverse_iterator x = i;
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if (++x == context.rend())
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out << kind << ": ";
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(*i)->describe(out);
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}
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}
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};
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#define DECLARE_EXCEPTION(kind, name) \
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class name : public kind { \
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public: \
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name(const string& why, error_context * ctxt = NULL) throw() \
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: kind(why, ctxt) {} \
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}
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class error : public str_exception {
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public:
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error(const string& why, error_context * ctxt = NULL) throw()
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: str_exception(why, ctxt) {}
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virtual ~error() throw() {}
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};
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class fatal : public str_exception {
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public:
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fatal(const string& why, error_context * ctxt = NULL) throw()
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: str_exception(why, ctxt) {}
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virtual ~fatal() throw() {}
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};
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class fatal_assert : public fatal {
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public:
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fatal_assert(const string& why, error_context * ctxt = NULL) throw()
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: fatal(string("assertion failed '") + why + "'", ctxt) {}
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virtual ~fatal_assert() throw() {}
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};
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} // namespace ledger
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#endif // _ERROR_H
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