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Code Issues Releases Wiki Activity

Made lime_scan_tokens.l somewhat more elegant to read

master
Richard van Velzen 2012-01-02 12:59:35 +01:00
parent 6163fdac49
commit f669d69163
1 changed files with 38 additions and 40 deletions
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78
lime_scan_tokens.l
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@ -14,9 +14,9 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
%{
void out(char*t, char*v);
void out(char* t, char* v);
void lit();
void tok(char*t);
void tok(char* t);
void php();
%}
@ -28,55 +28,53 @@ void php();
%x dquote
%x squote
CHAR \n|.
CHAR \n|.
ALPHA [a-zA-Z]
DIGIT [0-9]
ALNUM {ALPHA}|{DIGIT}
WORD {ALNUM}|_
STOP "."|";"
ALPHA [a-zA-Z]
DIGIT [0-9]
ALNUM {ALPHA}|{DIGIT}
WORD {ALNUM}|_
STOP "."|";"
SYM {ALPHA}{WORD}*'*
LIT '.'
SYM {ALPHA}{WORD}*'*
LIT '.'
ESC "\"{CHAR}
SCHAR [^\']|ESC
DCHAR [^\"]|ESC
COM "//"|"#"
ESC "\"{CHAR}
SCHAR [^\']|ESC
DCHAR [^\"]|ESC
COM "//"|"#"
CC [^*\n]
CX "*"+{CC}+
CT "*"+"/"
BLOCKCMT "/*"({CC}|{CX})*{CT}
CC [^*\n]
CX "*"+{CC}+
CT "*"+"/"
BLOCKCMT "/*"({CC}|{CX})*{CT}
%x pragma
%%
[[:space:]]+ {}
#.* {}
[[:space:]]+ {}
#.* {}
{STOP} out("stop", ".");
{SYM} tok("sym");
{LIT} tok("lit");
{BLOCKCMT} {}
{STOP} out("stop", ".");
{SYM} tok("sym");
{LIT} tok("lit");
{BLOCKCMT} {}
"/"{WORD}+ |
"/$" out("lambda", yytext+1);
"%prec" {
tok("prec");
}
"%"{WORD}+ {
"/$" out("lambda", yytext+1);
"%prec" tok("prec");
"%"{WORD}+ {
out("pragma", yytext+1);
yy_push_state(pragma);
}
<*>"{" {
<*>"{" {
lit();
yy_push_state(code);
}
. lit();
. lit();
<pragma>{
@ -95,16 +93,16 @@ BLOCKCMT "/*"({CC}|{CX})*{CT}
}
<code>{
"}" {
"}" {
lit();
yy_pop_state();
}
'{SCHAR}*' php();
\"{DCHAR}*\" php();
{COM}.* php();
{BLOCKCMT} php();
[^{}'"#/]+ php();
. php();
'{SCHAR}*' php();
\"{DCHAR}*\" php();
{COM}.* php();
{BLOCKCMT} php();
[^{}'"#/]+ php();
. php();
}
%%
@ -115,7 +113,7 @@ void lit() {
out(lit, yytext);
}
void tok(char*t) {
void tok(char* t) {
out(t, yytext);
}
@ -123,7 +121,7 @@ void php() {
out("php", yytext);
}
void out(char*type, char*value) {
void out(char* type, char* value) {
printf("%d\001%s\001%s", yylineno, type, value);
fputc(0, stdout);
}