70 lines
1.3 KiB
LLVM
70 lines
1.3 KiB
LLVM
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%{
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#include "knot_parser.hh"
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#define YY_DECL \
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yy::knot_parser::token_type knot_yylex (yy::knot_parser::semantic_type *yylval)
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#define yyterminate() return token::END
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typedef yy::knot_parser::token token;
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typedef yy::knot_parser::token_type token_type;
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%}
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%option noyywrap nounput batch prefix="knot_yy"
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%%
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-?[0-9]+ {
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yylval->integer = atoi (yytext);
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return token::INT;
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}
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[a-zA-Z]+ {
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if (!strcmp (yytext, "a"))
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{
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yylval->alternating = 1;
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return token::ALT;
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}
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else if (!strcmp (yytext, "L"))
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return token::LINK;
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else if (!strcmp (yytext, "n"))
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{
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yylval->alternating = 0;
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return token::NONALT;
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}
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else if (!strcmp (yytext, "T"))
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return token::T;
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else if (!strcmp (yytext, "U")
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|| !strcmp (yytext, "unknot"))
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return token::UNKNOT;
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else if (!strcmp (yytext, "X"))
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return token::X;
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else if (!strcmp (yytext, "BR"))
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return token::BR;
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else if (!strcmp (yytext, "PD"))
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return token::PD;
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else if (!strcmp (yytext, "DT")
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|| !strcmp (yytext, "DTCode"))
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return token::DT;
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else if (!strcmp (yytext, "BR"))
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return token::BR;
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else
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{
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yylval->string = strdup (yytext);
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return token::STRING;
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}
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}
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[\t\r\n ] /* ignore */
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. { return token_type (yytext[0]); }
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%%
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void
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knot_scan_string (const char *s)
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{
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knot_yy_scan_string (s);
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}
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