Fixed #10447 (FP: misra-c2012-10.3)

Author: danmar

addons/misra.py

@@ -445,7 +445,7 @@ def getEssentialTypeCategory(expr):
         return "enum<" + expr.valueType.typeScope.className + ">"
     if expr.variable:
         typeToken = expr.variable.typeStartToken
-        while typeToken:
+        while typeToken and typeToken.isName:
             if typeToken.str == 'char' and not typeToken.isSigned and not typeToken.isUnsigned:
                 return 'char'
             if typeToken.valueType:
@@ -506,6 +506,11 @@ def getEssentialType(expr):
         return '%s %s' % (expr.valueType.sign, expr.valueType.type)
 
     if expr.variable or isCast(expr):
+        typeToken = expr.variable.typeStartToken if expr.variable else expr.next
+        while typeToken and typeToken.isName:
+            if typeToken.str == 'char' and not typeToken.isSigned and not typeToken.isUnsigned:
+                return 'char'
+            typeToken = typeToken.next
         if expr.valueType:
             if expr.valueType.type == 'bool':
                 return 'bool'

addons/test/misra/misra-test.c

@@ -678,6 +678,7 @@ static void misra_10_3(uint32_t u32a, uint32_t u32b) {
     res = (uint16_t)(2U + 3U); // 10.3 10.8
     res = (uint16_t)2U + (uint16_t)3U;
     res = 0.1f; // 10.3
+    const char c = '0'; // no-warning
 }
 
 static void misra_10_4(u32 x, s32 y) {