[CI/PA1] Implemented all tokens, with esception to error and comments aren't perfect

1 files changed, 59 insertions, 12 deletions

diff --git a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool.flex b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool.flex
index e7e0674..9f86243 100644
--- a/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool.flex
+++ b/Year 3/Compilers, Introduction/coolc-spim/my-code/coursework/pa1/cool.flex
@@ -43,6 +43,28 @@ extern YYSTYPE cool_yylval;
  *  Add Your own definitions here
  */
 
+char* escapeString(char* str) {
+	unsigned escapes = 0, length = 0;
+	for (char* i = str; *i != 0; i++) {
+		if (*i == '\\') escapes++;
+		length++;
+	}
+	char* out = new char[length -= 2];
+	char* currout = out;
+	bool skipnext = false;
+	while (length > 0 && *(++str + 1) != 0) {
+		if (*str != '\\') {
+			*(currout++) = *str;
+		}
+		else if (str[1] == 'b') { *(currout++) = '\b'; str++; }
+		else if (str[1] == 't') { *(currout++) = '\t'; str++; }
+		else if (str[1] == 'n') { *(currout++) = '\n'; str++; }
+		else if (str[1] == 'f') { *(currout++) = '\f'; str++; }
+		else if (str[1] == '\\') { *(currout++) = '\\'; str++; }
+	}
+	return out;
+}
+
 %}
 
 /*
@@ -52,7 +74,8 @@ extern YYSTYPE cool_yylval;
 /* 
 Info from /usr/class/cs143/cool/include/PA2/cool-parse.h
 Token:
-CLASS ELSE FI IF IN INHERITS LET LOOP POOL THEN WHILE CASE ESAC OF DARROW NEW ISVOID STR_CONST INT_CONST BOOL_CONST TYPEID OBJECTID ASSIGN NOT LE ERROR
+STR_CONST CLASS ELSE FI IF IN INHERITS ISVOID LET LOOP POOL THEN WHILE CASE ESAC NEW OF NOT DARROW TYPEID OBJECTID INT_CONST BOOL_CONST ASSIGN LE 
+ERROR
 yylval types:
   Boolean boolean;
   Symbol symbol;
@@ -70,18 +93,42 @@ yylval types:
   char *error_msg;
 */
 
-OCBRACE	\{
-CCBRACE	\}
-ORBRACE \(
-CRBRACE \)
-COLUMN	\:
-SEMICOLUMN	\;
-
 %%
 
-"=>"	{ return (DARROW); }
-"class"		{ return (CLASS); }
-[A-Z][a-z]*	{ cool_yylval.symbol = inttable.add_string(yytext); return (TYPEID); }
-\{|\}|\(|\)|:|;	{ return *yytext; }
+\"(\\\"|[^"])*\"	{ cool_yylval.symbol = inttable.add_string(escapeString(yytext)); return (STR_CONST); }
+--[^\n\r]*		{ }
+\(\*.*\*\)		{ }
+
+(?i:class)		{ return (CLASS); }
+(?i:else)		{ return (ELSE); }
+(?i:fi)			{ return (FI); }
+(?i:if)			{ return (IF); }
+(?i:in)			{ return (IN); }
+(?i:inherits)		{ return (INHERITS); }
+(?i:isvoid)		{ return (ISVOID); }
+(?i:let)		{ return (LET); }
+(?i:loop)		{ return (LOOP); }
+(?i:pool)		{ return (POOL); }
+(?i:then)		{ return (THEN); }
+(?i:while)		{ return (WHILE); }
+(?i:case)		{ return (CASE); }
+(?i:esac)		{ return (ESAC); }
+(?i:new)		{ return (NEW); }
+(?i:of)			{ return (OF); }
+(?i:not)		{ return (NOT); }
+
+"=>"			{ return (DARROW); }
+"<="			{ return (LE); }
+"<-"			{ return (ASSIGN); }
+(t(?i:rue)|f(?i:alse))	{ cool_yylval.boolean = *yytext == 't'; return (BOOL_CONST); }
+
+[a-z][A-Za-z0-9_]*	{ cool_yylval.symbol = inttable.add_string(yytext); return (OBJECTID); }
+[0-9]+			{ cool_yylval.symbol = inttable.add_string(yytext); return (INT_CONST); }
+[A-Z][A-Za-z0-9_]*	{ cool_yylval.symbol = inttable.add_string(yytext); return (TYPEID); }
+
+\{|\}|\(|\)|:|;|,|@|\.|\+|-|\*|\/|~|<|<=|=		{ return *yytext; }
+
+[\n\r]		{ curr_lineno++; }
+[ \f\t\v] 	{ }
 
 %%