simplify suggestions ordering

src/App.tsx

@@ -2,8 +2,10 @@ import { useEffect, useState } from 'react';
 import './App.css';
 import { ExprBlock, type ExprBlockState } from './ExprBlock';
 import { GlobalContext } from './GlobalContext';
-import { biggerExample, higherOrder, higherOrder2Params, inc, initialEditorState, lambda2Params, nonEmptyEditorState, pushBool, tripleFunctionCallEditorState } from "./configurations";
+import { biggerExample, emptySet, higherOrder, higherOrder2Params, inc, initialEditorState, lambda2Params, nonEmptyEditorState, pushBool, tripleFunctionCallEditorState } from "./configurations";
 import { actionShortcuts } from './actions';
+import { scoreResolved, type ResolvedType } from './eval';
+import type { InputBlockState } from './InputBlock';
 
 
 const examples: [string, ExprBlockState][] = [
@@ -16,6 +18,7 @@ const examples: [string, ExprBlockState][] = [
   ["higher order 2"      , higherOrder2Params           ],
   ["push Bool"           , pushBool                     ],
   ["inc"                 , inc                          ],
+  ["empty set"           , emptySet                     ],
 ];
 
 type AppState = {
@@ -163,9 +166,8 @@ export function App() {
             state={appState.history.at(-1)!}
             setState={pushHistory}
             onCancel={() => {}}
-            suggestionPriority={() => {
+            score={(resolved: ResolvedType) => {
-              // console.log('suggestionPriority of App, always 0');
+              return scoreResolved(resolved, () => 0);
-              return 0;
             }}
           />
         </GlobalContext>

src/CallBlock.tsx

@@ -1,15 +1,14 @@
 import { useContext } from "react";
 
-import { ExprBlock, type ExprBlockState, type SetStateFn, type State2Props } from "./ExprBlock";
 import { EnvContext } from "./EnvContext";
-import { addFocusRightMost, evalCallBlock2, evalEditorBlock, removeFocus, scoreResolved, type ResolvedType } from "./eval";
+import { addFocusRightMost, evalCallBlock2, evalExprBlock, recomputeTypeVarsForEnv, scoreResolved, type Environment, type ResolvedType } from "./eval";
+import { ExprBlock, type ExprBlockState, type SetStateFn, type State2Props } from "./ExprBlock";
 import { GlobalContext } from "./GlobalContext";
 import { Value } from "./Value";
 
-import "./CallBlock.css";
-import { initialEditorState } from "./configurations";
-import { CallContext } from "./CallContext";
 import { getActions } from "./actions";
+import "./CallBlock.css";
+import { CallContext } from "./CallContext";
 
 export interface CallBlockState {
   kind: "call";
@@ -17,48 +16,61 @@ export interface CallBlockState {
   input: ExprBlockState;
 }
 
-interface CallBlockProps<
+export interface CallBlockProps<
   FnState=ExprBlockState,
   InputState=ExprBlockState,
 > extends State2Props<CallBlockState,ExprBlockState> {}
 
-function nestedFnProperties({state, setState, suggestionPriority}: CallBlockProps, env) {
+function nestedFnProperties({state, setState, score}: CallBlockProps, env) {
   const setFn = (callback: SetStateFn) => {
     setState(state => ({...state, fn: callback(state.fn)}));
   }
   const onFnCancel = () => {
     setState(state => state.input); // we become our input
   }
-  const fnSuggestionPriority = (fnSuggestion: ResolvedType) => computePriority(
+  const scoreFn = (fnSuggestion: ResolvedType) => {
+    return computePriority(
       fnSuggestion,
-      evalEditorBlock(state.input, env)[0],
+      evalExprBlock(state.input, env)[0],
-      suggestionPriority,
+      score,
       env,
     );
-  return {state: state.fn, setState: setFn, onCancel: onFnCancel, suggestionPriority: fnSuggestionPriority};
+  };
+  return {state: state.fn, setState: setFn, onCancel: onFnCancel, score: scoreFn};
 }
 
-function nestedInputProperties({state, setState, suggestionPriority}: CallBlockProps, env) {
+function nestedInputProperties({state, setState, score}: CallBlockProps, env: Environment) {
   const setInput = (callback: SetStateFn) => {
     setState(state => ({...state, input: callback(state.input)}));
   }
   const onInputCancel = () => {
     setState(state => addFocusRightMost(state.fn)); // we become our function
   }
-  const inputSuggestionPriorirty = (inputSuggestion: ResolvedType) => computePriority(
+  const scoreInput = (inputSuggestion: ResolvedType) => {
-    evalEditorBlock(state.fn, env)[0], // fn *may* be set
+    return computePriority(
-    inputSuggestion,       // suggestions will be for input
+      evalExprBlock(state.fn, env)[0], // fn *may* be set
-    suggestionPriority,       // priority function we get from parent block
+      inputSuggestion,       // suggestions will be for input
-    env,
+      score,    // priority function we get from parent block
-  )
+      env,
-  return {state: state.input, setState: setInput, onCancel: onInputCancel, suggestionPriority: inputSuggestionPriorirty};
+    );
+  }
+  return {state: state.input, setState: setInput, onCancel: onInputCancel, score: scoreInput};
+}
+
+function computePriority(fn: ResolvedType, input: ResolvedType, outPriority: (s: ResolvedType) => number, env) {
+  // dirty, but works:
+  const [fnR, env2] = recomputeTypeVarsForEnv('<fn>', fn, env);
+  const [inR, env3] = recomputeTypeVarsForEnv('<in>', input, env2);
+  const [resolved] = evalCallBlock2(fnR, inR, env3);
+  const score = scoreResolved(resolved, outPriority);
+  return score;
 }
 
 export function CallBlock(props: CallBlockProps) {
   const env = useContext(EnvContext);
   const globalContext = useContext(GlobalContext);
   const addParam = getActions(globalContext, props.setState).c;
-  const [resolved] = evalEditorBlock(props.state, env);
+  const [resolved] = evalExprBlock(props.state, env);
   return <span className={"functionBlock" + ((resolved.kind === "error") ? " unifyError" : "")}>
     <CallContext value={{addParam}}>
       <FunctionHeader {...props} addParam={addParam} />
@@ -80,12 +92,6 @@ export function CallBlock(props: CallBlockProps) {
   </span>;
 }
 
-function computePriority(fn: ResolvedType, input: ResolvedType, outPriority: (s: ResolvedType) => number, env) {
-  const [resolved] = evalCallBlock2(fn, input, env);
-  const score = scoreResolved(resolved, outPriority);
-  return score;
-}
-
 function FunctionHeader(props) {
   const env = useContext(EnvContext);
   const globalContext = useContext(GlobalContext);

src/ExprBlock.tsx

@@ -2,14 +2,14 @@ import { useContext } from "react";
 
 import { getType } from "dope2";
 
-import { CallBlock, type CallBlockState } from "./CallBlock";
+import { CallBlock, type CallBlockProps, type CallBlockState } from "./CallBlock";
 import { EnvContext } from "./EnvContext";
 import { GlobalContext } from "./GlobalContext";
-import { InputBlock, type InputBlockState } from "./InputBlock";
+import { InputBlock, type InputBlockProps, type InputBlockState } from "./InputBlock";
-import { LambdaBlock, type LambdaBlockState } from "./LambdaBlock";
+import { LambdaBlock, type LambdaBlockProps, type LambdaBlockState } from "./LambdaBlock";
-import { LetInBlock, type LetInBlockState } from "./LetInBlock";
+import { LetInBlock, type LetInBlockProps, type LetInBlockState } from "./LetInBlock";
 import { Type } from "./Type";
-import { evalEditorBlock, type ResolvedType } from "./eval";
+import { evalExprBlock, type ResolvedType } from "./eval";
 
 import "./ExprBlock.css";
 import { Input } from "./Input";
@@ -26,48 +26,31 @@ export type SetStateFn<InType = ExprBlockState, OutType = InType> = (state: InTy
 export interface State2Props<InType, OutType = InType> {
   state: InType;
   setState: (callback: SetStateFn<InType, OutType>) => void;
-  suggestionPriority: (suggestion: ResolvedType) => number;
+  score: (suggestion: ResolvedType) => number;
 }
 
 interface ExprBlockProps extends State2Props<ExprBlockState> {
   onCancel: () => void;
 }
 
-export function ExprBlock({state, setState, suggestionPriority, onCancel}: ExprBlockProps) {
+export function ExprBlock(props: ExprBlockProps) {
   const env = useContext(EnvContext);
   const globalContext = useContext(GlobalContext);
 
   const renderBlock = {
-    input: () => <InputBlock
+    input: () => <InputBlock {...props as InputBlockProps} />,
-        state={state as InputBlockState}
+    call: () => <CallBlock {...props as CallBlockProps} />,
-        setState={setState as (callback:(p:InputBlockState)=>ExprBlockState)=>void}
+    let: () => <LetInBlock {...props as LetInBlockProps} />,
-        suggestionPriority={suggestionPriority}
+    lambda: () => <LambdaBlock {...props as LambdaBlockProps} />,
-        onCancel={onCancel}
-      />,
-    call: () => <CallBlock
-        state={state as CallBlockState}
-        setState={setState as (callback:(p:CallBlockState)=>ExprBlockState)=>void}
-        suggestionPriority={suggestionPriority}
-      />,
-    let: () => <LetInBlock
-      state={state as LetInBlockState}
-      setState={setState as (callback:(p:LetInBlockState)=>ExprBlockState)=>void}
-      suggestionPriority={suggestionPriority}
-      />,
-    lambda: () => <LambdaBlock
-      state={state as LambdaBlockState}
-      setState={setState as (callback:(p:LambdaBlockState)=>ExprBlockState)=>void}
-      suggestionPriority={suggestionPriority}
-      />,
   };
   
-  const [resolved] = evalEditorBlock(state, env);
+  const [resolved] = evalExprBlock(props.state, env);
-  const actions = getActions(globalContext, setState);
+  const actions = getActions(globalContext, props.setState);
   const extraHandlers = Object.fromEntries(Object.entries(actions).map(([shortcut, action]) =>
     [shortcut, (e) => { e.preventDefault(); action(); }]))
 
   return <span className={"editor" + ((resolved.kind!=="value") ? " "+resolved.kind : "")}>
-    {renderBlock[state.kind]()}
+    {renderBlock[props.state.kind]()}
     <div className="typeSignature">
     &nbsp;::&nbsp;<Type type={getType(resolved)} />
     </div>
@@ -76,7 +59,7 @@ export function ExprBlock({state, setState, suggestionPriority, onCancel}: ExprB
       text=""
       suggestion=""
       onEnter={() => {}}
-      onCancel={onCancel}
+      onCancel={props.onCancel}
       onTextChange={() => {}}
       extraHandlers={extraHandlers}
       />

src/InputBlock.tsx

@@ -3,13 +3,12 @@ import { memo, useContext, useEffect, useMemo, useRef, useState } from "react";
 import { getType, prettyT, trie } from "dope2";
 
 import { EnvContext } from "./EnvContext";
-import type { Dynamic, ResolvedType } from "./eval";
+import type { Environment, ResolvedType } from "./eval";
 import "./InputBlock.css";
 import { Type } from "./Type";
 import type { ExprBlockState, State2Props } from "./ExprBlock";
 import { attemptParseLiteral } from "./eval";
 import { Input } from "./Input";
-import { initialEditorState } from "./configurations";
 import { CallContext } from "./CallContext";
 import { getActions } from "./actions";
 import { GlobalContext } from "./GlobalContext";
@@ -33,37 +32,35 @@ export interface InputBlockState {
   focus: boolean
 }
 
-export type SuggestionType = ['literal'|'name', string, Dynamic];
+export type SuggestionType = ["literal"|"name", string, ResolvedType];
 export type PrioritizedSuggestionType = [number, ...SuggestionType];
 
-interface InputBlockProps extends State2Props<InputBlockState,ExprBlockState> {
+export interface InputBlockProps extends State2Props<InputBlockState,ExprBlockState> {
   onCancel: () => void;
 }
 
-const computeSuggestions = (text, env, suggestionPriority: (s: ResolvedType) => number): PrioritizedSuggestionType[] => {
+const computeSuggestions = (
+  text: string,
+  env: Environment,
+  score: InputBlockProps['score'],
+): PrioritizedSuggestionType[] => {
   const literals = attemptParseLiteral(text, env);
-
   const ls: SuggestionType[] = [
     // literals
-    ... literals.map((lit) => ["literal", text, lit]),
+    ... literals.map((resolved) => ["literal", text, resolved]),
 
     // names
     ... trie.suggest(env.names)(text)(Infinity)
-        .map(([name,type]) => [
+        .map(([name, resolved]) => ["name", name, resolved]),
-          "name",
-          name, {
-            ...type,
-            substitutions: type.substitutions || new Map(),
-            kind: type.kind || "value",
-          }]),
   ]
   // return []; // <-- uncomment to disable suggestions (useful for debugging)
   return ls
-    .map((suggestion) => [suggestionPriority(suggestion[2]), ...suggestion] as PrioritizedSuggestionType)
+    .map((suggestion: SuggestionType) => 
+      [score(suggestion[2]), ...suggestion] as PrioritizedSuggestionType)
     .sort(([priorityA], [priorityB]) => priorityB - priorityA)
 }
 
-export function InputBlock({ state, setState, suggestionPriority, onCancel }: InputBlockProps) {
+export function InputBlock({ state, setState, score, onCancel }: InputBlockProps) {
   const {text, focus} = state;
   const globalContext = useContext(GlobalContext);
   const env = useContext(EnvContext);
@@ -72,7 +69,7 @@ export function InputBlock({ state, setState, suggestionPriority, onCancel }: In
   const [i, setI] = useState(0); // selected suggestion idx
 
   const singleSuggestion = trie.growPrefix(env.names)(text);
-  const suggestions = useMemo(() => computeSuggestions(text, env, suggestionPriority), [text, suggestionPriority, env]);
+  const suggestions = useMemo(() => computeSuggestions(text, env, score), [text, score, env]);
 
 
   useEffect(() => {
@@ -176,20 +173,20 @@ interface SuggestionProps {
   suggestion: PrioritizedSuggestionType;
 }
 
-function Suggestion({ setI, j, onSelect, highlighted, suggestion: [priority, kind, name, dynamic] }: SuggestionProps) {
+function Suggestion({ setI, j, onSelect, highlighted, suggestion: [priority, kind, text, resolved] }: SuggestionProps) {
   const onMouseEnter = j => () => {
     setI(j);
   };
   const onMouseDown = j => () => {
     setI(j);
-    onSelect([priority, kind, name, dynamic]);
+    onSelect();
   };
   return <div
     key={`${j}_${name}`}
     className={(highlighted ? " selected" : "")}
     onMouseEnter={onMouseEnter(j)}
     onMouseDown={onMouseDown(j)}>
-      ({priority}) ({kind}) {name} :: <Type type={getType(dynamic)} />
+      ({priority}) ({kind}) {text} :: <Type type={resolved.t} />
   </div>
 }
 

src/LambdaBlock.tsx

@@ -4,7 +4,7 @@ import { eqType, getSymbol, reduceUnification } from "dope2";
 
 import { ExprBlock, type ExprBlockState, type State2Props } from "./ExprBlock";
 import { EnvContext } from "./EnvContext";
-import { evalEditorBlock, makeInnerEnv, makeTypeVar } from "./eval";
+import { evalExprBlock, makeInnerEnv, makeTypeVar } from "./eval";
 
 import "./LambdaBlock.css";
 import { Type } from "./Type";
@@ -17,14 +17,14 @@ export interface LambdaBlockState {
   expr: ExprBlockState;
 }
 
-interface LambdaBlockProps<
+export interface LambdaBlockProps<
   FnState=ExprBlockState,
   InputState=ExprBlockState,
 > extends State2Props<LambdaBlockState,ExprBlockState> {
 }
 
 
-export function LambdaBlock({state, setState, suggestionPriority}: LambdaBlockProps) {
+export function LambdaBlock({state, setState, score}: LambdaBlockProps) {
   const env = useContext(EnvContext);
 
   const setParamName = paramName => setState(state => ({
@@ -38,7 +38,7 @@ export function LambdaBlock({state, setState, suggestionPriority}: LambdaBlockPr
 
   const [paramType, staticInnerEnv] = makeTypeVar(env, state.paramName);
 
-  const [exprResolved] = evalEditorBlock(state.expr, staticInnerEnv);
+  const [exprResolved] = evalExprBlock(state.expr, staticInnerEnv);
 
   const inferredParamType = reduceUnification(exprResolved.unification).get(getSymbol(paramType)) || paramType;
 
@@ -76,9 +76,9 @@ export function LambdaBlock({state, setState, suggestionPriority}: LambdaBlockPr
           state={state.expr}
           setState={setExpr}
           onCancel={() => setState(state => state.expr)}
-          suggestionPriority={(s) => {
+          score={(s) => {
             // console.log('suggestionPriority of lambdaInner... just passing through');
-            return suggestionPriority(s);
+            return score(s);
           }}
           />
       </EnvContext>

src/LetInBlock.tsx

@@ -2,7 +2,7 @@ import { useContext } from "react";
 
 import { ExprBlock, type ExprBlockState } from "./ExprBlock";
 import { EnvContext } from "./EnvContext";
-import { evalEditorBlock, makeInnerEnv, scoreResolved, type ResolvedType } from "./eval";
+import { evalExprBlock, makeInnerEnv, scoreResolved, type ResolvedType } from "./eval";
 import { type State2Props } from "./ExprBlock";
 import { GlobalContext } from "./GlobalContext";
 
@@ -17,7 +17,7 @@ export interface LetInBlockState {
   inner: ExprBlockState;
 }
 
-interface LetInBlockProps extends State2Props<LetInBlockState,ExprBlockState> {
+export interface LetInBlockProps extends State2Props<LetInBlockState,ExprBlockState> {
 }
 
 export function LetInBlock(props: LetInBlockProps) {
@@ -31,7 +31,7 @@ export function LetInBlock(props: LetInBlockProps) {
   </span>
 }
 
-function DeclColumns({state: {name, value, inner, focus}, setState, suggestionPriority}) {
+function DeclColumns({state: {name, value, inner, focus}, setState, score}) {
   const env = useContext(EnvContext);
   const globalContext = useContext(GlobalContext);
 
@@ -40,11 +40,11 @@ function DeclColumns({state: {name, value, inner, focus}, setState, suggestionPr
 
   const valueSuggestionPriority = (suggestion: ResolvedType) => {
     const innerEnv = makeInnerEnv(env, name, suggestion);
-    const [resolved] = evalEditorBlock(inner, innerEnv);
+    const [resolved] = evalExprBlock(inner, innerEnv);
-    return scoreResolved(resolved, suggestionPriority);
+    return scoreResolved(resolved, score);
   };
 
-  const [valueResolved] = evalEditorBlock(value, env);
+  const [valueResolved] = evalExprBlock(value, env);
   const innerEnv = makeInnerEnv(env, name, valueResolved);
 
   return <>
@@ -65,7 +65,7 @@ function DeclColumns({state: {name, value, inner, focus}, setState, suggestionPr
         <ExprBlock
           state={value}
           setState={setValue}
-          suggestionPriority={valueSuggestionPriority}
+          score={valueSuggestionPriority}
           onCancel={() => setState(state => state.inner)} // keep inner
           />
       </span>
@@ -75,18 +75,18 @@ function DeclColumns({state: {name, value, inner, focus}, setState, suggestionPr
         <DeclColumns
           state={inner}
           setState={setInner}
-          suggestionPriority={suggestionPriority}
+          score={score}
           />
       </EnvContext>
     }
   </>;
 }
 
-function InnerMost({state, setState, suggestionPriority}) {
+function InnerMost({state, setState, score}) {
   const env = useContext(EnvContext);
   const globalContext = useContext(GlobalContext);
   const setInner = callback => setState(state => ({...state, inner: callback(state.inner)}));
-  const [valueResolved] = evalEditorBlock(state.value, env);
+  const [valueResolved] = evalExprBlock(state.value, env);
   const innerEnv = makeInnerEnv(env, state.name, valueResolved);
   const onCancel = () => setState(state => state.value);
   if (state.inner.kind === "let" && globalContext?.syntacticSugar) {
@@ -94,7 +94,7 @@ function InnerMost({state, setState, suggestionPriority}) {
         <InnerMost
           state={state.inner}
           setState={setInner}
-          suggestionPriority={suggestionPriority}
+          score={score}
           />
       </EnvContext>;
   }
@@ -103,7 +103,7 @@ function InnerMost({state, setState, suggestionPriority}) {
       <ExprBlock
         state={state.inner}
         setState={setInner}
-        suggestionPriority={suggestionPriority}
+        score={score}
         onCancel={onCancel} // keep value
         />
     </EnvContext>

src/configurations.ts

@@ -137,4 +137,6 @@ export const higherOrder2Params: ExprBlockState = {"kind":"let","focus":false,"i
 
 export const pushBool: ExprBlockState = {"kind":"call","fn":{"kind":"call","fn":{"kind":"input","text":"list.push","value":{"kind":"name"},"focus":false},"input":{"kind":"input","text":"list.emptyList","value":{"kind":"name"},"focus":false}},"input":{"kind":"input","text":"Bool","value":{"kind":"name"},"focus":true}};
 
-export const inc: ExprBlockState = {"kind":"let","focus":false,"inner":{"kind":"input","text":"","value":{"kind":"name"},"focus":false},"name":"inc","value":{"kind":"lambda","focus":false,"paramName":"x","expr":{"kind":"call","fn":{"kind":"call","fn":{"kind":"input","text":"addInt","value":{"kind":"name"},"focus":false},"input":{"kind":"input","text":"x","value":{"kind":"name"},"focus":false}},"input":{"kind":"input","text":"1","value":{"kind":"literal","type":"Int"},"focus":true}}}};
+export const inc: ExprBlockState = {"kind":"let","focus":false,"inner":{"kind":"input","text":"","value":{"kind":"name"},"focus":false},"name":"inc","value":{"kind":"lambda","focus":false,"paramName":"x","expr":{"kind":"call","fn":{"kind":"call","fn":{"kind":"input","text":"addInt","value":{"kind":"name"},"focus":false},"input":{"kind":"input","text":"x","value":{"kind":"name"},"focus":false}},"input":{"kind":"input","text":"1","value":{"kind":"literal","type":"Int"},"focus":true}}}};
+
+export const emptySet: ExprBlockState = {"kind":"call","fn":{"kind":"input","text":"set.emptySet","value":{"kind":"name"},"focus":false},"input":{"kind":"input","text":"","value":{"kind":"text"},"focus":true}};

src/eval.ts

@@ -4,7 +4,7 @@ import type { ExprBlockState } from "./ExprBlock";
 import type { InputValueType } from "./InputBlock";
 
 const IS_DEV = (import.meta.env.MODE === "development");
-const VERBOSE = false;
+const VERBOSE = true;
 
 export interface Environment {
   names: any;
@@ -46,7 +46,7 @@ export type ResolvedType = Dynamic | DeepError | Unknown;
 
 class NotFoundError extends Error {}
 
-export const evalEditorBlock = (s: ExprBlockState, env: Environment): [ResolvedType,Environment] => {
+export const evalExprBlock = (s: ExprBlockState, env: Environment): [ResolvedType,Environment] => {
   if (s.kind === "input") {
     return evalInputBlock(s.text, s.value, env);
   }
@@ -88,8 +88,8 @@ export function evalInputBlock(text: string, value: InputValueType, env: Environ
 }
 
 export function evalCallBlock(fn: ExprBlockState, input: ExprBlockState, env: Environment): [ResolvedType,Environment] {
-  const [fnResolved, env2] = evalEditorBlock(fn, env);
+  const [fnResolved, env2] = evalExprBlock(fn, env);
-  const [inputResolved, env3] = evalEditorBlock(input, env2);
+  const [inputResolved, env3] = evalExprBlock(input, env2);
   if (VERBOSE) {
     console.log('==== evalCallBlock ====');
     console.log('env          :', env);
@@ -103,6 +103,9 @@ export function evalCallBlock(fn: ExprBlockState, input: ExprBlockState, env: En
 }
 
 export function evalCallBlock2(fnResolved: ResolvedType, inputResolved: ResolvedType, env: Environment): [ResolvedType,Environment] {
+  if (occurring(fnResolved.t).intersection(occurring(inputResolved.t)).size > 0) {
+    throw new Error(`Precondition failed: function (${prettyT(fnResolved.t)}) and its input (${prettyT(inputResolved.t)}) have overlapping typevars!`);
+  }
   if (getSymbol(fnResolved.t) !== symbolFunction) {
     // not a function...
     if (isTypeVar(fnResolved.t)) {
@@ -143,7 +146,7 @@ const inverseUnification = (uni, inverse) => {
   );
 }
 
-function recomputeTypeVarsForEnv(name: string, resolved: ResolvedType, env: Environment): [ResolvedType,Environment] {
+export function recomputeTypeVarsForEnv(name: string, resolved: ResolvedType, env: Environment): [ResolvedType,Environment] {
   const [[newType], inverse] = recomputeTypeVarsWithInverse([resolved.t], env.nextFreeTypeVar);
   const newResolved: ResolvedType = {
     ...resolved,
@@ -281,9 +284,9 @@ function evalCallBlock3(fnResolved: ResolvedType, inputResolved: ResolvedType, e
 }
 
 export function evalLetInBlock(value: ExprBlockState, name: string, inner: ExprBlockState, env: Environment): [ResolvedType,Environment] {
-  const [valueResolved] = evalEditorBlock(value, env);
+  const [valueResolved] = evalExprBlock(value, env);
   const innerEnv = makeInnerEnv(env, name, valueResolved);
-  return evalEditorBlock(inner, innerEnv);
+  return evalExprBlock(inner, innerEnv);
 }
 
 const prettyRU = (rUni: Map<string, Type>) => {
@@ -301,7 +304,7 @@ export function evalLambdaBlock(paramName: string, expr: ExprBlockState, env: En
     console.log('===================================')
   }
 
-  const [exprResolved] = evalEditorBlock(expr, staticInnerEnv);
+  const [exprResolved] = evalExprBlock(expr, staticInnerEnv);
   const lambdaT = fnType(_ => paramType)(_ => exprResolved.t);
   // This is the only place in the code where we actually do something with the 'substitutions'. We compute the type of our lambda function:
   const reduced = reduceUnification(exprResolved.unification);
@@ -331,7 +334,7 @@ export function evalLambdaBlock(paramName: string, expr: ExprBlockState, env: En
           t: paramTypeSubstituted,
           unification: new Map(),
         });
-        const [result] = evalEditorBlock(expr, innerEnv);
+        const [result] = evalExprBlock(expr, innerEnv);
         if (result.kind === "value") {
           return result.i;
         }
@@ -410,17 +413,23 @@ export function attemptParseLiteral(text: string, env: Environment): Dynamic[] {
 
 export function scoreResolved(resolved: ResolvedType, outPriority: (s:ResolvedType) => number) {
   const bias = outPriority(resolved);
+
+  console.log('scoreResolved...', resolved);
   
   if (resolved.kind === "value") {
+    console.log('best:', 2, bias);
     return 2 + bias;
   }
   else if (resolved.kind === "unknown") {
+    console.log('ok:', 1, bias);
     return 1 + bias;
   }
   if (resolved.e instanceof UnifyError) {
+    console.log('bad:', -1, bias);
     return -1 + bias; // parameter doesn't match
   }
   else {
+    console.log('worst:', -2, bias);
     return -2 + bias; // even worse: fn is not a function!
   }
 }