132 lines
5.1 KiB
LLVM
132 lines
5.1 KiB
LLVM
%{
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#define YY_NO_UNISTD_H
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#define YY_USER_ACTION this->location.columns(yyleng);
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#include <sstream>
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#include "parser.hpp"
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#undef YY_DECL
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#define YY_DECL yy::parser::symbol_type elna::syntax::FooLexer::lex()
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#define yyterminate() return yy::parser::make_YYEOF(this->location)
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%}
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%option c++ noyywrap never-interactive
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%option yyclass="elna::syntax::FooLexer"
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%%
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%{
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this->location.step();
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%}
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\-\-.* {
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/* Skip the comment */
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}
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[\ \t\r] ; /* Skip the whitespaces */
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\n+ {
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this->location.lines(yyleng);
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this->location.step();
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}
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if {
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return yy::parser::make_IF(this->location);
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}
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then {
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return yy::parser::make_THEN(this->location);
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}
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while {
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return yy::parser::make_WHILE(this->location);
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}
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do {
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return yy::parser::make_DO(this->location);
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}
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proc {
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return yy::parser::make_PROCEDURE(this->location);
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}
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begin {
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return yy::parser::make_BEGIN_BLOCK(this->location);
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}
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end {
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return yy::parser::make_END_BLOCK(this->location);
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}
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const {
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return yy::parser::make_CONST(this->location);
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}
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var {
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return yy::parser::make_VAR(this->location);
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}
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True {
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return yy::parser::make_BOOLEAN(true, this->location);
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}
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False {
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return yy::parser::make_BOOLEAN(false, this->location);
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}
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[A-Za-z_][A-Za-z0-9_]* {
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return yy::parser::make_IDENTIFIER(yytext, this->location);
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}
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[0-9]+ {
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return yy::parser::make_NUMBER(strtol(yytext, NULL, 10), this->location);
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}
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\( {
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return yy::parser::make_LEFT_PAREN(this->location);
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}
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\) {
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return yy::parser::make_RIGHT_PAREN(this->location);
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}
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\>= {
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return yy::parser::make_GREATER_EQUAL(this->location);
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}
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\<= {
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return yy::parser::make_LESS_EQUAL(this->location);
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}
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\> {
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return yy::parser::make_GREATER_THAN(this->location);
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}
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\< {
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return yy::parser::make_LESS_THAN(this->location);
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}
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\/= {
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return yy::parser::make_NOT_EQUAL(this->location);
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}
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= {
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return yy::parser::make_EQUALS(this->location);
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}
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; {
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return yy::parser::make_SEMICOLON(this->location);
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}
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\. {
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return yy::parser::make_DOT(this->location);
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}
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, {
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return yy::parser::make_COMMA(this->location);
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}
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\+ {
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return yy::parser::make_PLUS(this->location);
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}
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\- {
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return yy::parser::make_MINUS(this->location);
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}
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\* {
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return yy::parser::make_MULTIPLICATION(this->location);
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}
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\/ {
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return yy::parser::make_DIVISION(this->location);
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}
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:= {
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return yy::parser::make_ASSIGNMENT(this->location);
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}
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: {
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return yy::parser::make_COLON(this->location);
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}
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\^ {
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return yy::parser::make_HAT(this->location);
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}
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@ {
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return yy::parser::make_AT(this->location);
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}
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. {
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std::stringstream ss;
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ss << "Illegal character 0x" << std::hex << static_cast<unsigned char>(yytext[0]);
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throw yy::parser::syntax_error(this->location, ss.str());
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}
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%%
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