1 files changed, 33 insertions, 0 deletions
diff --git a/lex.l b/lex.l
new file mode 100644
index 0000000..036d58e
--- /dev/null
+++ b/lex.l
@@ -0,0 +1,33 @@
+%{
+#include "syntax.tab.h"  // Bison 生成的头文件
+void yyerror(const char *s);
+%}
+%option noyywrap
+%%
+[\t ]+                 { /* Ignore whitespace */ }
+"\n"                   { printf("new line\n");return NEWLINE; }
+"\\\n"                 { printf("> "); }
+">>"                   { return APPEND_OUT; }
+"<<"                   { return HEREDOC; }
+">"                    { return REDIRECT_OUT; }
+"<"                    { return REDIRECT_IN; }
+">>&"                  { return APPEND_OUTPUT_ERR; }
+">&"                   { return REDIRECT_OUTPUT_ERR; }
+"|"                    { return PIPE; }
+"&&"                   { return AND; }
+"||"                   { return OR; }
+"&"                    { return BACKGROUND; }
+\"(\\.|[^\"])*\"       { yylval.str = strdup(yytext); return STRING; }
+[a-zA-Z0-9_\-\/.]+     { yylval.str = strdup(yytext); return WORD; }
+%%
+void yyerror(const char *s)
+{
+    fprintf(stderr, "error: %s\n", s);
+}

diff --git a/lex.l b/lex.l new file mode 100644 index 0000000..036d58e --- /dev/null +++ b/lex.l
@@ -0,0 +1,33 @@
	1	%{
	2	#include "syntax.tab.h" // Bison 生成的头文件
	3
	4	void yyerror(const char *s);
	5	%}
	6
	7	%option noyywrap
	8
	9	%%
	10
	11	[\t ]+ { /* Ignore whitespace */ }
	12	"\n" { printf("new line\n");return NEWLINE; }
	13	"\\\n" { printf("> "); }
	14	">>" { return APPEND_OUT; }
	15	"<<" { return HEREDOC; }
	16	">" { return REDIRECT_OUT; }
	17	"<" { return REDIRECT_IN; }
	18	">>&" { return APPEND_OUTPUT_ERR; }
	19	">&" { return REDIRECT_OUTPUT_ERR; }
	20	"\|" { return PIPE; }
	21	"&&" { return AND; }
	22	"\|\|" { return OR; }
	23	"&" { return BACKGROUND; }
	24	\"(\\.\|[^\"])*\" { yylval.str = strdup(yytext); return STRING; }
	25	[a-zA-Z0-9_\-\/.]+ { yylval.str = strdup(yytext); return WORD; }
	26
	27
	28	%%
	29
	30	void yyerror(const char *s)
	31	{
	32	fprintf(stderr, "error: %s\n", s);
	33	}