82 lines
4.6 KiB
Plaintext
82 lines
4.6 KiB
Plaintext
/* Lexical Analysis with Flex (1.6.0) We used some of the code from this manual */
|
|
/* so we placed the citation here. */
|
|
/* definitions */
|
|
|
|
%option noyywrap
|
|
%{
|
|
#include <stdbool.h>
|
|
#include "typedefs.h"
|
|
int line_number = 1, column_number = 1;
|
|
bool DEBUG = true;
|
|
%}
|
|
|
|
COM ([^*]|\*+[^)*])*
|
|
ID [A-Za-z_][0-9A-Za-z_]*
|
|
DIGIT [0-9]
|
|
CHAR \\n|\\t|\\'|[^'\n\t\\]
|
|
/* char can be a newline, tab, an escaped quote, or anything but a single quote, an actual line break, an actual tab, or a backslash by itself (to prevent confusion from escaped quote */
|
|
SCHAR \\n|\\t|\\\"|[^\"\n\\]
|
|
/* similar to above, a string Char (SCHAR) is the same as a CHAR except we cannot have double quotes instead of single quotes. Double quotes need to be escaped in Flex unlike single quotes based on documentation */
|
|
|
|
%%
|
|
|
|
"integer" {if(DEBUG) {printf( "T_INTEGER: %s (%d)\n", yytext, T_INTEGER);} else {return T_INTEGER;}}
|
|
"address" {if(DEBUG) {printf( "T_ADDRESS: %s (%d)\n", yytext, T_ADDRESS);} else {return T_ADDRESS;}}
|
|
"Boolean" {if(DEBUG) {printf( "T_BOOLEAN: %s (%d)\n", yytext, T_BOOLEAN);} else {return T_BOOLEAN;}}
|
|
"character" {if(DEBUG) {printf( "T_CHARACTER: %s (%d)\n", yytext, T_CHARACTER);} else {return T_CHARACTER;}}
|
|
|
|
"while" {if(DEBUG) {printf( "WHILE: %s (%d)\n", yytext, WHILE);} else {return WHILE;}}
|
|
"if" {if(DEBUG) {printf( "IF: %s (%d)\n", yytext, IF);} else {return IF;}}
|
|
"then" {if(DEBUG) {printf( "THEN: %s (%d)\n", yytext, THEN);} else {return THEN;}}
|
|
"else" {if(DEBUG) {printf( "ELSE: %s (%d)\n", yytext, ELSE);} else {return ELSE;}}
|
|
"type" {if(DEBUG) {printf( "TYPE: %s (%d)\n", yytext, TYPE);} else {return TYPE;}}
|
|
"function" {if(DEBUG) {printf( "FUNCTION: %s (%d)\n", yytext, FUNCTION);} else {return FUNCTION;}}
|
|
"return" {if(DEBUG) {printf( "RETURN: %s (%d)\n", yytext, RETURN);} else {return RETURN;}}
|
|
"external" {if(DEBUG) {printf( "EXTERNAL: %s (%d)\n", yytext, EXTERNAL);} else {return EXTERNAL;}}
|
|
"as" {if(DEBUG) {printf( "AS: %s (%d)\n", yytext, AS);} else {return AS;}}
|
|
|
|
"release" {if(DEBUG) {printf( "RELEASE: %s (%d)\n", yytext, RELEASE);} else {return RELEASE;}}
|
|
"reserve" {if(DEBUG) {printf( "RESERVE: %s (%d)\n", yytext, RESERVE);} else {return RESERVE;}}
|
|
|
|
"+" {if(DEBUG) {printf( "ADD: %s (%d)\n", yytext, ADD);} else {return ADD;}}
|
|
"-" {if(DEBUG) {printf( "SUB_OR_NEG: %s (%d)\n", yytext, SUB_OR_NEG);} else {return SUB_OR_NEG;}}
|
|
"*" {if(DEBUG) {printf( "MUL: %s (%d)\n", yytext, MUL);} else {return MUL;}}
|
|
"/" {if(DEBUG) {printf( "DIV: %s (%d)\n", yytext, DIV);} else {return DIV;}}
|
|
"%" {if(DEBUG) {printf( "REM: %s (%d)\n", yytext, REM);} else {return REM;}}
|
|
"<" {if(DEBUG) {printf( "LESS_THAN: %s (%d)\n", yytext, LESS_THAN);} else {return LESS_THAN;}}
|
|
"=" {if(DEBUG) {printf( "EQUAL_TO: %s (%d)\n", yytext, EQUAL_TO);} else {return EQUAL_TO;}}
|
|
":=" {if(DEBUG) {printf( "ASSIGN: %s (%d)\n", yytext, ASSIGN);} else {return ASSIGN;}}
|
|
"!" {if(DEBUG) {printf( "NOT: %s (%d)\n", yytext, NOT);} else {return NOT;}}
|
|
"&" {if(DEBUG) {printf( "AND: %s (%d)\n", yytext, AND);} else {return AND;}}
|
|
"|" {if(DEBUG) {printf( "OR: %s (%d)\n", yytext, OR);} else {return OR;}}
|
|
"." {if(DEBUG) {printf( "DOT: %s (%d)\n", yytext, DOT);} else {return DOT;}}
|
|
|
|
";" {if(DEBUG) {printf( "SEMI_COLON: %s (%d)\n", yytext, SEMI_COLON);} else {return SEMI_COLON;}}
|
|
":" {if(DEBUG) {printf( "COLON: %s (%d)\n", yytext, COLON);} else {return COLON;}}
|
|
"," {if(DEBUG) {printf( "COMMA: %s (%d)\n", yytext, COMMA);} else {return COMMA;}}
|
|
"->" {if(DEBUG) {printf( "ARROW: %s (%d)\n", yytext, ARROW);} else {return ARROW;}}
|
|
|
|
{DIGIT}+ {if(DEBUG) {printf( "C_INTEGER: %s (%d)\n", yytext, C_INTEGER);} else {return C_INTEGER;}}
|
|
'{CHAR}' {if(DEBUG) {printf( "C_CHARACTER: %s (%d)\n", yytext, C_CHARACTER);} else {return C_CHARACTER;}}
|
|
\"{SCHAR}*\" {if(DEBUG) {printf( "C_STRING: %s (%d)\n", yytext, C_STRING);} else {return C_STRING;}}
|
|
"(*"{COM}"*)" {if(DEBUG) {printf( "COMMENT: %s (%d)\n", yytext, COMMENT);} else {return COMMENT;}}
|
|
"true" {if(DEBUG) {printf( "C_TRUE: %s (%d)\n", yytext, C_TRUE);} else {return C_TRUE;}}
|
|
"false" {if(DEBUG) {printf( "C_FALSE: %s (%d)\n", yytext, C_FALSE);} else {return C_FALSE;}}
|
|
"null" {if(DEBUG) {printf( "C_NULL: %s (%d)\n", yytext, C_NULL);} else {return C_NULL;}}
|
|
|
|
{ID} {if(DEBUG) {printf( "ID: %s (%d)\n", yytext, ID);} else {return ID;}}
|
|
|
|
\n {line_number++; column_number = 1;}
|
|
. {column_number++;}
|
|
|
|
%%
|
|
|
|
int main( int argc, char **argv )
|
|
{
|
|
argc--, argv++;
|
|
if ( argc > 0 )
|
|
yyin = fopen( argv[0], "r" );
|
|
else
|
|
yyin = stdin;
|
|
yylex();
|
|
} |