65 lines
1.5 KiB
Plaintext
65 lines
1.5 KiB
Plaintext
%{
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#include <cstdio>
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#include <cstdint>
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#include <iostream>
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#include "DragonLispScanner.hh"
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#undef YY_DECL
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#define YY_DECL int DragonLisp::DLScanner::yylex(DragonLisp::DLParser::semantic_type* const lval, DragonLisp::DLParser::location_type* location, DragonLisp::DLDriver& drv)
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using token = DragonLisp::DLParser::token;
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#define yyterminate() return token::TOKEN_END;
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#define YY_USER_ACTION loc->columns(yyleng);
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%}
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%option yyclass="DragonLisp::DLScanner"
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%option verbose backup warn noyywrap c++ nounistd debug noline
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id [a-zA-Z_][a-zA-Z_0-9]*
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int [0-9]+
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blank [ \t\v\r]
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%%
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%{
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yylval = lval;
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%}
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{blank}+ { loc->step(); }
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\n+ { loc->lines(yyleng); loc->step(); }
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"<=" { return token::TOKEN_LE; }
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">=" { return token::TOKEN_GE; }
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"<" { return token::TOKEN_LT; }
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">" { return token::TOKEN_GT; }
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"=" { return token::TOKEN_EQUAL; }
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"/=" { return token::TOKEN_NE; }
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"(" { return token::TOKEN_LPAREN; }
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")" { return token::TOKEN_RPAREN; }
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"+" { return token::TOKEN_PLUS; }
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"-" { return token::TOKEN_MINUS; }
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"*" { return token::TOKEN_STAR; }
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"/" { return token::TOKEN_SLASH; }
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{int} {
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errno = 0;
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int64_t n = strtoll(yytext, nullptr, 10);
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if (errno)
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throw DragonLisp::DLParser::syntax_error(*loc, "Invalid integer provided: " + std::string(yytext));
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yylval->emplace<int64_t>(n);
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return token::TOKEN_NUMBER;
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};
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{id} { /* return DragonLisp::DLParser::make_IDENTIFIER(yytext, *loc); */ }
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. { throw DragonLisp::DLParser::syntax_error(*loc, "Invalid character: " + std::string(yytext)); }
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<<EOF>> { yyterminate(); }
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%%
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