Merge pull request #73 from mkantor/miscellanea

Miscellaneous minor improvements

Author: mkantor

examples/.snapshot

@@ -3,7 +3,7 @@ exports[`examples > fibonacci.plz --input="not a number" > stderr 1`] = `
 `;
 
 exports[`examples > fibonacci.plz --input="not a number" > stdout 1`] = `
-"input must be a natural number"
+"--input must be a natural number"
 
 `;
 
@@ -12,7 +12,7 @@ exports[`examples > fibonacci.plz --input=-1 > stderr 1`] = `
 `;
 
 exports[`examples > fibonacci.plz --input=-1 > stdout 1`] = `
-"input must be a natural number"
+"--input must be a natural number"
 
 `;
 
@@ -57,7 +57,7 @@ exports[`examples > fibonacci.plz > stderr 1`] = `
 `;
 
 exports[`examples > fibonacci.plz > stdout 1`] = `
-"missing input argument"
+"missing --input argument"
 
 `;
 

examples/fibonacci.plz

@@ -1,21 +1,22 @@
 {
   fibonacci: n =>
     @if {
-      condition: :n < 2
+      :n < 2
       then: :n
       else: :fibonacci(:n - 1) + :fibonacci(:n - 2)
     }
 
   input: @runtime { context =>
+    // read --input from command-line arguments
     :context.arguments.lookup(input)
   }
 
   output: :input match {
-    none: _ => "missing input argument"
+    none: _ => "missing --input argument"
     some: input => @if {
-      condition: :natural_number.is(:input)
+      :natural_number.is(:input)
       then: :fibonacci(:input)
-      else: "input must be a natural number"
+      else: "--input must be a natural number"
     }
   }
 }.output

package.json

@@ -3,7 +3,7 @@
   "version": "0.0.0",
   "type": "module",
   "bin": {
-    "please": "./please"
+    "please": "please"
   },
   "scripts": {
     "0": "node ./dist/language/cli/0.js",

src/language/parsing/atom.ts

@@ -11,6 +11,7 @@ import {
   zeroOrMore,
 } from '@matt.kantor/parsing'
 import {
+  arrow,
   atSign,
   backslash,
   closingBlockCommentDelimiter,
@@ -32,6 +33,7 @@ import { whitespace } from './trivia.js'
 export type Atom = string
 
 const atomComponentsRequiringQuotation = [
+  arrow,
   atSign,
   backslash,
   closingBlockCommentDelimiter,
@@ -46,10 +48,8 @@ const atomComponentsRequiringQuotation = [
   singleLineCommentDelimiter,
   whitespace,
 
-  // Reserved to allow symbols like `=>` to not be conflated with atoms:
-  literal('='),
-
   // Reserved for future use:
+  literal('='),
   literal('['),
   literal(']'),
   literal('#'),