69 lines
1.7 KiB
Text
69 lines
1.7 KiB
Text
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%{
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#include <stdio.h>
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#include <stdlib.h>
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#include "parser.h"
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%}
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%option warn nodefault
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/* makes the scanner terminate after reaching <<EOF>> instead of assuming a new input was provided */
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%option noyywrap
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/* disable some unused functionality, add scanner tracking */
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%option nounput noinput batch debug
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/* gimme a reentrant parser (overkill but more pure) */
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%option reentrant
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%option bison-bridge
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NL [\n]
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SPACE [ ]
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NUM [0-9]
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CRATE_DELIM_OPEN "["
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CRATE_DELIM_CLOSE "]"
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CRATE_ID [A-Z]
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%%
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{NL} {
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return NEWLINE;
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}
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{SPACE} {
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return SPACE;
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}
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{NUM}+ {
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unsigned long num = strtoul(yytext, NULL, 10);
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yylval->num = num;
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return NUMBER;
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}
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{CRATE_DELIM_OPEN} {
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return CRATE_DELIM_OPEN;
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}
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{CRATE_DELIM_CLOSE} {
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return CRATE_DELIM_CLOSE;
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}
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{CRATE_ID} {
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yylval->cval = yytext[0];
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return CRATE_ID;
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}
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"move " {
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return MOVE_OP;
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}
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" from " {
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return ORIGIN;
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}
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" to " {
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return DEST;
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}
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<<EOF>> {
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return END_OF_FILE;
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}
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. {
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printf("[error] Encountered unexpected token %s\n", yytext);
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return 0;
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}
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%%
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