Initial

README.md

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+# iris
+
+Small (toy) dependently typed core w. a bidirectional typechecker. It takes a named raw syntax, checks and elaborates it into a de Bruijn core and evaluates terms into semantic values, quotes them back for diagnostics and uses conversion checking to compare normal forms. The current kernel has explicit universe levels `U0`, `U1`, `U2`, dependent function and pair types, projections, annotations, and `let`
+
+One of the checked examples is:
+
+```lean
+def depPairTy : Raw :=
+  .sig "A" (.univ 2) (.var "A")
+
+def depPairTm : Raw :=
+  .pair
+    (.univ 1)
+    (.pi "_" (.univ 0) (.univ 0))
+```
+
+which elaborates to a pair whose first component is the type `U1` and whose second component inhabits it