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#include "stdafx.h"
#include "Params.h"
struct StatePtr;
typedef StatePtr (*State)(const wchar_t *, Params &);
struct StatePtr {
StatePtr() : p(null) {}
StatePtr(State p) : p(p) {}
StatePtr operator () (const wchar_t *s, Params &l) { return (*p)(s, l); }
operator bool() { return p != null; }
State p;
};
#define PARSE_ERROR(msg) \
result.mode = Params::modeError; \
result.modeParam = msg; \
result.modeParam2 = null; \
return StatePtr()
#define EXPECT_MORE(msg) \
if (arg == null) { \
PARSE_ERROR(msg); \
}
static StatePtr start(const wchar_t *arg, Params &result);
static StatePtr function(const wchar_t *arg, Params &result) {
EXPECT_MORE(L"Missing function name.");
result.modeParam = arg;
return &start;
}
static StatePtr tests(const wchar_t *arg, Params &result) {
EXPECT_MORE(L"Missing package name.");
result.modeParam = arg;
return &start;
}
static StatePtr replCommand(const wchar_t *arg, Params &result) {
EXPECT_MORE(L"Missing repl command.");
result.modeParam2 = arg;
return &start;
}
static StatePtr root(const wchar_t *arg, Params &result) {
EXPECT_MORE(L"Missing root path.");
if (result.root) {
PARSE_ERROR(L"Root already set once!");
}
result.root = arg;
return &start;
}
static StatePtr importShort(const wchar_t *arg, Params &result) {
EXPECT_MORE(L"Missing import path.");
Import i = {
arg,
null,
false
};
result.import.push_back(i);
return &start;
}
static StatePtr importPath(const wchar_t *arg, Params &result) {
EXPECT_MORE(L"Missing import path.");
result.import.back().path = arg;
return &start;
}
static StatePtr importLong(const wchar_t *arg, Params &result) {
EXPECT_MORE(L"Missing import target.");
Import i = {
null,
arg,
false
};
result.import.push_back(i);
return &importPath;
}
static StatePtr replLang(const wchar_t *arg, Params &result) {
EXPECT_MORE(L"Missing language for the REPL.");
result.mode = Params::modeRepl;
result.modeParam = arg;
return &start;
}
static StatePtr consumeArgv(const wchar_t *arg, Params &result) {
if (arg == null)
return StatePtr();
result.argv.push_back(arg);
return &consumeArgv;
}
static StatePtr start(const wchar_t *arg, Params &result) {
if (arg == null) {
return StatePtr();
} else if (wcscmp(arg, L"-?") == 0 || wcscmp(arg, L"--help") == 0) {
result.mode = Params::modeHelp;
return StatePtr();
} else if (wcscmp(arg, L"-f") == 0) {
result.mode = Params::modeFunction;
return &function;
} else if (wcscmp(arg, L"-t") == 0) {
result.mode = Params::modeTests;
return &tests;
} else if (wcscmp(arg, L"-T") == 0) {
result.mode = Params::modeTestsRec;
return &tests;
} else if (wcscmp(arg, L"-c") == 0) {
result.mode = Params::modeRepl;
return &replCommand;
} else if (wcscmp(arg, L"-i") == 0) {
return &importShort;
} else if (wcscmp(arg, L"-I") == 0) {
return &importLong;
} else if (wcscmp(arg, L"-r") == 0) {
return &root;
} else if (wcscmp(arg, L"-l") == 0) {
return &replLang;
} else if (wcscmp(arg, L"--version") == 0) {
result.mode = Params::modeVersion;
return StatePtr();
} else if (wcscmp(arg, L"--server") == 0) {
result.mode = Params::modeServer;
return StatePtr();
} else if (wcscmp(arg, L"--noconsole") == 0) {
result.noConsole = true;
return &start;
} else if (wcscmp(arg, L"--") == 0) {
return &consumeArgv;
} else {
// This is the same as -i
Import i = {
arg,
null,
true
};
result.import.push_back(i);
return &start;
}
}
Params::Params(int argc, const wchar_t *argv[])
: mode(modeAuto),
root(null),
modeParam(L"bs"),
modeParam2(null),
import(),
noConsole(false) {
StatePtr state = &start;
for (int i = 1; i < argc; i++) {
if (state) {
state = state(argv[i], *this);
} else if (mode != Params::modeError) {
mode = Params::modeError;
modeParam = L"Unknown parameter: ";
modeParam2 = argv[i];
break;
} else {
break;
}
}
if (state && mode != Params::modeError)
state(null, *this);
}
void help(const wchar_t *cmd) {
wcout << L"Usage: " << endl;
wcout << cmd << L" - launch the default REPL." << endl;
wcout << cmd << L" <path> - import file or directory (like -i), launch function 'main' if able." << endl;
wcout << cmd << L" -l <language> - launch the REPL for <language>." << endl;
wcout << cmd << L" -f <function> - run <function> then exit." << endl;
wcout << cmd << L" -t <package> - run all tests in <package> then exit." << endl;
wcout << cmd << L" -T <package> - run all tests in <package> and all sub-packages then exit." << endl;
wcout << cmd << L" -i <path> - import directory or file as the name of the package." << endl;
wcout << cmd << L" -I <name> <path> - import package (directory) at <path> as <name>." << endl;
wcout << cmd << L" -c <expr> - evaluate <expr> in the default REPL." << endl;
wcout << cmd << L" -r <path> - use <path> as the root path." << endl;
wcout << cmd << L" --version - print the current version and exit." << endl;
wcout << cmd << L" --server - start the language server." << endl;
wcout << cmd << L" --noconsole - on Windows: deallocate the console window during startup." << endl;
wcout << cmd << L" -- <arguments> - interpret remaining arguments as parameters to the program." << endl;
}
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