Maybe it's the tabs?

lang/pc/comp/node.xh

@@ -2,44 +2,43 @@
 #ifndef NODE_H_
 #define NODE_H_
 
-#define Value		0	/* constant */
-#define Name		1	/* an identifier */
-#define Uoper		2	/* unary operator */
-#define Boper		3	/* binary operator */
-#define Xset		4	/* a set */
-#define Set		5	/* a set constant */
-#define Call		6	/* a function call */
-#define NameOrCall	7	/* call or name of function */
-#define Arrow		8	/* ^ construction */
-#define Arrsel		9	/* array selection */
-#define Def		10	/* an identified name */
-#define Link		11
-#define LinkDef		12
-#define Cast		13	/* convert integer to real */
-#define IntCoerc	14	/* coercion of integers to longs */
-#define IntReduc	15	/* reduction of longs to integers */
-				/* do NOT change the order or the numbers!!! */
-
 struct node {
-	struct node *nd_left;
+    struct node *nd_left;
 #define nd_next nd_left
-	struct node *nd_right;
-	int nd_class;		/* kind of node */
-	struct type *nd_type;	/* type of this node */
-	struct token nd_token;
-#define nd_def		nd_token.tk_data.tk_def
-#define nd_set		nd_token.tk_data.tk_set
-#define nd_lab		nd_token.tk_data.tk_lab
-#define nd_symb		nd_token.tk_symb
-#define nd_lineno	nd_token.tk_lineno
-#define nd_IDF		nd_token.TOK_IDF
-#define nd_STR		nd_token.TOK_STR
-#define nd_SLE		nd_token.TOK_SLE
-#define nd_SLA		nd_token.TOK_SLA
-#define nd_INT		nd_token.TOK_INT
-#define nd_REL		nd_token.TOK_REL
-#define nd_RLA		nd_token.TOK_RLA
-#define nd_RIV		nd_token.TOK_RIV
+    struct node *nd_right;
+    int nd_class;               /* kind of node */
+#define Value           0       /* constant */
+#define Name            1       /* an identifier */
+#define Uoper           2       /* unary operator */
+#define Boper           3       /* binary operator */
+#define Xset            4       /* a set */
+#define Set             5       /* a set constant */
+#define Call            6       /* a function call */
+#define NameOrCall      7       /* call or name of function */
+#define Arrow           8       /* ^ construction */
+#define Arrsel          9       /* array selection */
+#define Def             10      /* an identified name */
+#define Link            11
+#define LinkDef         12
+#define Cast            13      /* convert integer to real */
+#define IntCoerc        14      /* coercion of integers to longs */
+#define IntReduc        15      /* reduction of longs to integers */
+                /* do NOT change the order or the numbers!!! */
+    struct type *nd_type;       /* type of this node */
+    struct token nd_token;
+#define nd_def          nd_token.tk_data.tk_def
+#define nd_set          nd_token.tk_data.tk_set
+#define nd_lab          nd_token.tk_data.tk_lab
+#define nd_symb         nd_token.tk_symb
+#define nd_lineno       nd_token.tk_lineno
+#define nd_IDF          nd_token.TOK_IDF
+#define nd_STR          nd_token.TOK_STR
+#define nd_SLE          nd_token.TOK_SLE
+#define nd_SLA          nd_token.TOK_SLA
+#define nd_INT          nd_token.TOK_INT
+#define nd_REL          nd_token.TOK_REL
+#define nd_RLA          nd_token.TOK_RLA
+#define nd_RIV          nd_token.TOK_RIV
 
 
 
@@ -54,8 +53,8 @@ int NodeCrash(struct node *expp);
 
 
 
-#define IsProcCall(lnd)	((lnd)->nd_type->tp_fund & T_ROUTINE)
+#define IsProcCall(lnd) ((lnd)->nd_type->tp_fund & T_ROUTINE)
 
-#define	NULLNODE ((struct node *) 0)
+#define NULLNODE ((struct node *) 0)
 
 #endif