59 lines
845 B
Plaintext
59 lines
845 B
Plaintext
// An example of using the flex C++ scanner class.
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%option C++ noyywrap
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%{
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int mylineno = 0;
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%}
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string \"[^\n"]+\"
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ws [ \t]+
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alpha [A-Za-z]
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dig [0-9]
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name ({alpha}|{dig}|\$)({alpha}|{dig}|\_|\.|\-|\/|\$)*
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num1 [-+]?{dig}+\.?([eE][-+]?{dig}+)?
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num2 [-+]?{dig}*\.{dig}+([eE][-+]?{dig}+)?
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number {num1}|{num2}
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%%
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{ws} /* skip blanks and tabs */
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"/*" {
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int c;
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while((c = yyinput()) != 0)
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{
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if(c == '\n')
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++mylineno;
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else if(c == '*')
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{
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if((c = yyinput()) == '/')
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break;
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else
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unput(c);
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}
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}
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}
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{number} cout << "number " << YYText() << '\n';
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\n mylineno++;
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{name} cout << "name " << YYText() << '\n';
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{string} cout << "string " << YYText() << '\n';
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%%
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int main( int /* argc */, char** /* argv */ )
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{
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FlexLexer* lexer = new yyFlexLexer;
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while(lexer->yylex() != 0)
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;
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return 0;
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}
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