nitcc: add AST transformation tests

Signed-off-by: Jean Privat <[email protected]>

Author: privat

contrib/nitcc/tests/sav/trans2.input.res

@@ -0,0 +1,20 @@
+Start
+  s_0
+    s_0
+      s_0
+        s_0
+          s_0
+            s_1
+              b_0
+                'x'@(1:1-1:2)
+            b_0
+              'x'@(1:2-1:3)
+          c_0
+            'y'@(1:3-1:4)
+        c_0
+          'y'@(1:4-1:5)
+      b_0
+        'x'@(1:5-1:6)
+    c_0
+      'y'@(1:6-1:7)
+  Eof@(1:7-1:7)=''

contrib/nitcc/tests/sav/trans_token.input.res

@@ -0,0 +1,4 @@
+Start
+  p
+    a@(1:1-1:2)='a'
+  Eof@(1:2-1:2)=''

contrib/nitcc/tests/trans2.input

@@ -0,0 +1 @@
+xxyyxy

contrib/nitcc/tests/trans2.sablecc

@@ -0,0 +1,8 @@
+Grammar trans;
+
+Parser
+
+s = s b | b;
+a = ;
+b {-> a} = 'x' | c {->};
+c {-> a} = 'y';

contrib/nitcc/tests/trans_token.input

@@ -0,0 +1 @@
+a

contrib/nitcc/tests/trans_token.sablecc

@@ -0,0 +1,6 @@
+Lexer
+a = 'a';
+
+Parser
+p = q;
+q {-> a} = a {->};