michaelkuc6/Flexible-CAP
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First usable generator source.

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Still issues with usage rules and error reporting, but functional.
This commit is contained in:
Michael Kuc
2019-09-28 16:01:40 +01:00
parent 54de004ede
commit 60d0446cf0
24 changed files with 1605 additions and 0 deletions
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123
generator/templates/ArgGrammarScanner.ll Normal file
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{{=@@ @@=}}
%{
#include <stdexcept>
#include "@@{argspec}@@ArgGrammarParser.tab.hh"
#include "@@{argspec}@@ArgGrammarScanner.hpp"
#undef YY_DECL
#define YY_DECL int @@{argspec}@@ArgGrammar::Scanner::yylex(@@{argspec}@@ArgGrammar::Parser::semantic_type* const lval)
using token = @@{argspec}@@ArgGrammar::Parser::token;
%}
%option debug
%option nodefault
%option yyclass="@@{argspec}@@ArgGrammar::Scanner"
%option noyywrap
%option c++
%option outfile="@@{argspec}@@ArgGrammarScannerDef.cpp"
%x SHORT_ARGUMENTS ARGUMENT_VALUE POSITIONAL_ARGUMENTS@@#argument_tokens@@@@#parameters@@ @@{clean_token}@@_PARAMETER_@@{index}@@@@/parameters@@@@/argument_tokens@@
ANYTHING .|\n
LONGARG [[:alnum:]][[:alnum:]\-]*
%%
%{ /** Code executed at the beginning of yylex **/
yyval = lval;
static std::vector<std::string> parameters;
%}@@#argument_tokens@@@@#has_parameters@@
<@@#parameters@@@@{clean_token}@@_PARAMETER_@@{index}@@@@#next_state@@,@@/next_state@@@@/parameters@@>-- { /** invalid usage of --@@{argument}@@ flag **/
BEGIN(POSITIONAL_ARGUMENTS);
std::cerr << "--@@{argument}@@ has not been given sufficient parameters:\n";
for (const auto& parameter : parameters)
std::cerr << "\t- \'" << parameter << "\'\n";
setResult(Result::wrongArgument);
}@@/has_parameters@@@@/argument_tokens@@
<*>-- { /* end of arguments */
BEGIN(POSITIONAL_ARGUMENTS);
}
/** Arguments **/
@@#argument_tokens@@
<INITIAL>--@@{argument}@@ {@@#has_parameters@@
BEGIN(@@{clean_token}@@_PARAMETER_1);
parameters = {};@@/has_parameters@@@@^has_parameters@@
driver.addArg(@@{argspec}@@ArgGrammar::FlagArg::@@{clean_token}@@);
return token::ARGUMENT_@@{clean_token}@@;@@/has_parameters@@
}@@#short_argument@@
<SHORT_ARGUMENTS>@@{short_argument}@@ {@@#has_parameters@@
BEGIN(@@{clean_token}@@_PARAMETER_1);
resetVal = std::nullopt;
parameters = {};@@/has_parameters@@@@^has_parameters@@
driver.addArg(@@{argspec}@@ArgGrammar::FlagArg::@@{clean_token}@@);
return token::ARGUMENT_@@{clean_token}@@;@@/has_parameters@@
}@@/short_argument@@@@#parameters@@
<@@{clean_token}@@_PARAMETER_@@{index}@@>{ANYTHING}+ {@@#next_state@@
BEGIN(@@{clean_token}@@_PARAMETER_@@{.}@@);@@/next_state@@@@^next_state@@
BEGIN(INITIAL);@@/next_state@@
parameters.push_back(yytext);@@^next_state@@
driver.addArg(@@{argspec}@@ArgGrammar::ParamArg::@@{clean_token}@@, parameters);
return token::ARGUMENT_@@{clean_token}@@;@@/next_state@@
}@@/parameters@@
@@/argument_tokens@@
/** Default (error) arguments */
<INITIAL>--{LONGARG} {
std::cerr << "Unknown argument: \'" << yytext << "\' found\n";
setResult(Result::wrongArgument);
}
<INITIAL>--{ANYTHING}+ { /* show common error for invalid option */
std::cerr << "Invalid argument: \'" << yytext << "\' found\n";
setResult(Result::wrongArgument);
}
<SHORT_ARGUMENTS>{ANYTHING} {
std::cerr << "Unknown argument \'-" << yytext << "\' found\n";
setResult(Result::wrongArgument);
}
/** Check for short argument **/
<INITIAL>-/{ANYTHING}+ {
BEGIN(SHORT_ARGUMENTS);
resetVal = INITIAL;
}
/** Check for possible unknown arguments **/
<POSITIONAL_ARGUMENTS>{ANYTHING}+ {
/* std::cerr << "Unknown positional argument \'" << yytext << "\' found\n";
setResult(Result::wrongArgument); */
yyval->build<std::string>(yytext);
return token::POSITIONAL_ARGUMENT;
}
<INITIAL>{ANYTHING}* { /* unknown positional argument */
BEGIN(POSITIONAL_ARGUMENTS);
/* std::cerr << "Unknown positional argument \'" << yytext << "\' found\n";
setResult(Result::wrongArgument); */
yyval->build<std::string>(yytext);
return token::POSITIONAL_ARGUMENT;
}
%%
namespace @@{argspec}@@ArgGrammar {
void Scanner::resetOnWrap() {
if (resetVal)
BEGIN(*resetVal);
resetVal = INITIAL;
}
}