From d841bbe49825f604d0d52365675d2332ed76fae7 Mon Sep 17 00:00:00 2001
From: acqn <acqn163@outlook.com>
Date: Sun, 2 Aug 2020 21:51:32 +0800
Subject: [PATCH] Utility to check for castability.

---
 src/cc65/datatype.c | 16 ++++++++++++++++
 src/cc65/datatype.h |  6 ++++++
 2 files changed, 22 insertions(+)

diff --git a/src/cc65/datatype.c b/src/cc65/datatype.c
index d1c34c825..cffec7880 100644
--- a/src/cc65/datatype.c
+++ b/src/cc65/datatype.c
@@ -1018,6 +1018,22 @@ Type* ArrayToPtr (Type* T)
 
 
 
+int IsClassArithmetic (const Type* T)
+/* Return true if this is an arithmetic type */
+{
+    return IsClassInt (T) || IsClassFloat (T);
+}
+
+
+
+int IsCastType (const Type* T)
+/* Return true if this type can be used for casting */
+{
+    return IsClassArithmetic (T) || IsClassPtr (T) || IsTypeVoid (T);
+}
+
+
+
 int IsVariadicFunc (const Type* T)
 /* Return true if this is a function type or pointer to function type with
 ** variable parameter list
diff --git a/src/cc65/datatype.h b/src/cc65/datatype.h
index ad382d50f..66f1b8b05 100644
--- a/src/cc65/datatype.h
+++ b/src/cc65/datatype.h
@@ -578,6 +578,12 @@ INLINE int IsClassFunc (const Type* T)
 #  define IsClassFunc(T)        (GetClass (T) == T_CLASS_FUNC)
 #endif
 
+int IsClassArithmetic (const Type* T);
+/* Return true if this is an arithmetic type */
+
+int IsCastType (const Type* T);
+/* Return true if this type can be used for casting */
+
 #if defined(HAVE_INLINE)
 INLINE TypeCode GetRawSignedness (const Type* T)
 /* Get the raw signedness of a type */