From 6400c868e2b320cac821581ed4bc6a65e2a216fc Mon Sep 17 00:00:00 2001
From: Michael Forney <mforney@mforney.org>
Date: Tue, 25 Jun 2019 12:26:26 -0700
Subject: Implement prefixed character constants

---
 cc.h   |  1 +
 expr.c | 12 +++++++++---
 targ.c |  2 ++
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/cc.h b/cc.h
index 8978d89..0c0d08b 100644
--- a/cc.h
+++ b/cc.h
@@ -410,6 +410,7 @@ extern struct type typevalist, typevalistptr;
 
 struct target {
 	const char *name;
+	struct type *typewchar;
 };
 
 extern struct target *targ;
diff --git a/expr.c b/expr.c
index 2e74ba4..591d80a 100644
--- a/expr.c
+++ b/expr.c
@@ -415,6 +415,7 @@ primaryexpr(struct scope *s)
 {
 	struct expr *e;
 	struct decl *d;
+	struct type *t;
 	char *src, *dst, *end;
 	int base;
 
@@ -453,10 +454,15 @@ primaryexpr(struct scope *s)
 		break;
 	case TCHARCONST:
 		src = tok.lit;
-		if (*src != '\'')
-			fatal("wide character constant not yet implemented");
+		t = &typeint;
+		switch (*src) {
+		case 'L': ++src; t = targ->typewchar; break;
+		case 'u': ++src; t = &typeushort;     break;
+		case 'U': ++src; t = &typeuint;       break;
+		}
+		assert(*src == '\'');
 		++src;
-		e = mkconstexpr(&typeint, unescape(&src));
+		e = mkconstexpr(t, unescape(&src));
 		if (*src != '\'')
 			error(&tok.loc, "character constant contains more than one character: %c", *src);
 		next();
diff --git a/targ.c b/targ.c
index a3fd2f0..5a2f806 100644
--- a/targ.c
+++ b/targ.c
@@ -8,9 +8,11 @@ struct target *targ;
 static struct target alltargs[] = {
 	{
 		.name = "x86_64",
+		.typewchar = &typeint,
 	},
 	{
 		.name = "aarch64",
+		.typewchar = &typeuint,
 	},
 };
 
-- 
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