ExprStrOps: add str.substring(0, 0) case

See kaitai-io/kaitai_struct_compiler#277 (comment)
kaitai-io · Aug 27, 2024 · b70a99d · b70a99d
1 parent 9f78281
commit b70a99d
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diff --git a/formats/expr_str_ops.ksy b/formats/expr_str_ops.ksy
@@ -16,6 +16,8 @@ instances:
     value: one.substring(2, 5)
   one_substr_3_to_3:
     value: one.substring(3, 3)
+  one_substr_0_to_0:
+    value: one.substring(0, 0)
 
   two:
     value: '"0123456789"'

diff --git a/spec/ks/expr_str_ops.kst b/spec/ks/expr_str_ops.kst
@@ -13,6 +13,8 @@ asserts:
     expected: '"o|b"'
   - actual: one_substr_3_to_3
     expected: '""'
+  - actual: one_substr_0_to_0
+    expected: '""'
 
   - actual: two
     expected: '"0123456789"'