feat: implement #ifndef directive

1 files changed, 38 insertions, 0 deletions

diff --git a/tests/078.sh b/tests/078.sh
new file mode 100644
index 0000000..3f890fd
--- /dev/null
+++ b/tests/078.sh
@@ -0,0 +1,38 @@
+set -e
+
+cat <<'EOF' > expected
+__ducc__ is defined.
+A is defined.
+B is undefined.
+EOF
+
+bash ../../test_diff.sh <<'EOF'
+int printf();
+
+#define A 123
+
+int main() {
+
+#ifndef __ducc__
+    printf("__ducc__ is undefined.\n");
+#else
+    printf("__ducc__ is defined.\n");
+#endif
+
+#ifndef A
+    printf("A is undefined.\n");
+#else
+    printf("A is defined.\n");
+#endif
+
+#ifndef B
+    printf("B is undefined.\n");
+#else
+    printf("B is defined.\n");
+#endif
+
+#define B 456
+
+    return 0;
+}
+EOF