From 27556004e8e12a72ed1c2c70212f6b660ed798c3 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Thu, 2 Dec 2021 21:59:36 +0800
Subject: import(life): ...

---
 works/life/compile-principle-experiment/4/lex.l | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 works/life/compile-principle-experiment/4/lex.l

(limited to 'works/life/compile-principle-experiment/4/lex.l')

diff --git a/works/life/compile-principle-experiment/4/lex.l b/works/life/compile-principle-experiment/4/lex.l
new file mode 100644
index 0000000..e7731ca
--- /dev/null
+++ b/works/life/compile-principle-experiment/4/lex.l
@@ -0,0 +1,20 @@
+%{
+#include "main.h"
+#include "syn.h"
+%}
+%option noyywrap
+%%
+[ \t]	{ ; }	/* skip blanks and tabs */
+[0-9]+\.?|[0-9]*\.[0-9]+ {
+	Symbol *s = cru_symbol_install("", UNDEF, (SymbolValue)0.0);
+	sscanf(yytext, "%lf", &s->value.val);
+	yylval.sym = s;
+	return NUMBER; }
+[a-zA-Z][a-zA-Z0-9]* {
+	Symbol *s;
+	if ((s=cru_symbol_lookup(yytext)) == 0)
+		s = cru_symbol_install(yytext, UNDEF, (SymbolValue)0.0);
+	yylval.sym = s;
+	return s->type == UNDEF ? VAR : s->type; }
+\n	{ lineno++; return '\n'; }   /* everything else */
+.	{ return yytext[0]; }
-- 
cgit v1.2.3