1 files changed, 22 insertions, 0 deletions
diff --git a/notes.md b/notes.md
new file mode 100644
index 0000000..9eddec5
--- /dev/null
+++ b/notes.md
@@ -0,0 +1,22 @@
+# Problem
+When in a one-of block, it's harder to tell where an error came from.
+
+# Current solution
+We have critical blocks that stop parsing when the parser inside fails.
+
+# Problem with current solution
+We need to be dilligent in placing critical blocks.
+
+# Another approach
+We could take a page from LR parsers and instead of driving the parsing from the parsers themselves we invert the flow, making the input drive the parsing. This results in a breadth first parsing, where the one-of block parses one step of every of it's children and decides which to keep. In the event there's only one children left, it is critical, so a failure stops parsing and reports the error.
+
+# How to select between BF and DF when parsing
+Add an extra argument to parser type (lambda (input)) for the parsing mode.
+one-of will be BF and comp will be DF.
+This means that the immediate children of a one-of block will be parsed step by step.
+
+# Implementing BF in bind
+Instead of calling the resulting function with the input, return it.
+It will be the caller's responsibility to call the resulting lambda with the appropiate input.
+This will give control to the one-of block to call the next parsing step.
+