From 6c7ed6b0e6086e32710a0d42e034bce6bdaad7b0 Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Tue, 29 Nov 2005 04:23:33 +0000
Subject: new backquote syntax

---
 src/cmd/acid/lex.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'src/cmd/acid')

diff --git a/src/cmd/acid/lex.c b/src/cmd/acid/lex.c
index ed7f459d..f265d6c9 100644
--- a/src/cmd/acid/lex.c
+++ b/src/cmd/acid/lex.c
@@ -341,6 +341,33 @@ eatnl(void)
 	}
 }
 
+int
+bqsymbol(void)
+{
+	int c;
+	char *p;
+	Lsym *s;
+
+	symbol[0] = 0;
+	p = symbol;
+	while((c = lexc()) != '`'){
+		if(c == Eof)
+			error("eof in backquote");
+		if(c == '\n')
+			error("newline in backquote");
+		*p++ = c;
+	}
+	if(p >= symbol+sizeof symbol)
+		sysfatal("overflow in bqsymbol");
+	*p = 0;
+	
+	s = look(symbol);
+	if(s == 0)
+		s = enter(symbol, Tid);
+	yylval.sym = s;
+	return s->lexval;
+}
+
 int
 yylex(void)
 {
@@ -360,6 +387,9 @@ loop:
 		}
 		return Eof;
 
+	case '`':
+		return bqsymbol();
+
 	case '"':
 		eatstring();
 		return Tstring;
-- 
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