PP: Fix #1694: Handle badly formed argument substitution.

Also added a warning for no space after a macro name.

Test/baseResults/cppBad.vert.out

@@ -1,9 +1,10 @@
 cppBad.vert
-ERROR: 0:2: 'preprocessor evaluation' : bad expression 
-ERROR: 0:2: '#if' : unexpected tokens following directive 
-ERROR: 0:5: 'string' : End of line in string 
-ERROR: 0:5: '""' : string literals not supported 
-ERROR: 0:5: '' :  syntax error, unexpected INT, expecting COMMA or SEMICOLON
+WARNING: 0:1: '#define' : missing space after macro name 
+ERROR: 0:3: 'preprocessor evaluation' : bad expression 
+ERROR: 0:3: '#if' : unexpected tokens following directive 
+ERROR: 0:6: 'string' : End of line in string 
+ERROR: 0:6: '""' : string literals not supported 
+ERROR: 0:6: '' :  syntax error, unexpected INT, expecting COMMA or SEMICOLON
 ERROR: 5 compilation errors.  No code generated.
 
 

Test/baseResults/cppBad3.vert.out

@@ -0,0 +1,18 @@
+cppBad3.vert
+ERROR: 0:3: 'macro expansion' : End of input in macro y
+ERROR: 1 compilation errors.  No code generated.
+
+
+Shader version: 100
+ERROR: node is still EOpNull!
+0:?   Linker Objects
+
+
+Linked vertex stage:
+
+ERROR: Linking vertex stage: Missing entry point: Each stage requires one entry point
+
+Shader version: 100
+ERROR: node is still EOpNull!
+0:?   Linker Objects
+

Test/cppBad.vert

@@ -1,4 +1,5 @@
-#define m#0#
+#define n#0#
+#define m #0#
 #if m
 #endif
 #define n()

Test/cppBad3.vert

@@ -0,0 +1,3 @@
+#define f =y(.
+#define y(m)
+y(f)