Allow whitespace between plucked word and its pattern

.github/workflows/playwright.yml

@@ -24,7 +24,7 @@ jobs:
       run: echo "PLAYWRIGHT_VERSION=$(pnpm ls @playwright/test --parseable | tail -1)" >> $GITHUB_ENV
       working-directory: web-test
     - name: Cache playwright binaries
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       id: playwright-cache
       with:
         path: |

CHANGELOG.md

@@ -17,6 +17,8 @@ Unreleased
 - [#520](https://github.com/peggyjs/peggy/pull/520) Grammar with token "constructor" fails to generate
 - [#522](https://github.com/peggyjs/peggy/pull/522) Switched from puppeteer
   to playwright for web tests, and added them to CI.
+- [#513](https://github.com/peggyjs/peggy/pull/513) Allow whitespace between
+  plucked word and its pattern.
 
 ### Documentation
 - [#506](https://github.com/peggyjs/peggy/pull/506) Added END OF INPUT (`!.`).

lib/parser.js

@@ -1697,11 +1697,10 @@ function peg$parse(input, options) {
       s0 = peg$currPos;
       s1 = peg$parseLabelColon();
       if (s1 !== peg$FAILED) {
-        s2 = peg$parse__();
-        s3 = peg$parsePrefixedExpression();
-        if (s3 !== peg$FAILED) {
+        s2 = peg$parsePrefixedExpression();
+        if (s2 !== peg$FAILED) {
           peg$savedPos = s0;
-          s0 = peg$f23(s1, s3);
+          s0 = peg$f23(s1, s2);
         } else {
           peg$currPos = s0;
           s0 = peg$FAILED;
@@ -1739,7 +1738,7 @@ function peg$parse(input, options) {
   }
 
   function peg$parseLabelColon() {
-    var s0, s1, s2, s3;
+    var s0, s1, s2, s3, s4;
 
     s0 = peg$currPos;
     s1 = peg$parseIdentifierName();
@@ -1753,6 +1752,7 @@ function peg$parse(input, options) {
         if (peg$silentFails === 0) { peg$fail(peg$e12); }
       }
       if (s3 !== peg$FAILED) {
+        s4 = peg$parse__();
         peg$savedPos = s0;
         s0 = peg$f25(s1);
       } else {

src/parser.pegjs

@@ -267,7 +267,7 @@ LabeledExpression
         location: location()
       };
     }
-  / label:LabelColon __ expression:PrefixedExpression {
+  / label:LabelColon expression:PrefixedExpression {
       return {
         type: "labeled",
         label: label[0],
@@ -282,7 +282,7 @@ Pluck
   = "@" { return location(); }
 
 LabelColon
-  = label:IdentifierName __ ":" {
+  = label:IdentifierName __ ":" __ {
       if (reservedWords.indexOf(label[0]) >= 0) {
         error(`Label can't be a reserved word "${label[0]}"`, label[1]);
       }

test/unit/parser.spec.js

@@ -367,6 +367,9 @@ describe("Peggy grammar parser", () => {
     expect("start = a:'abcd'\nb:'efgh'").to.parseAs(
       oneRuleGrammar(sequence2)
     );
+    expect("start = a: 'abcd'\nb :'efgh'").to.parseAs(
+      oneRuleGrammar(sequence2)
+    );
     expect("start = a:'abcd'\nb:'efgh'\nc:'ijkl'\nd:'mnop'").to.parseAs(
       oneRuleGrammar(sequence4)
     );
@@ -395,6 +398,15 @@ describe("Peggy grammar parser", () => {
     expect("start = @a:'abcd'").to.parseAs(
       $S($P("a", literalAbcd))
     );
+    expect("start = @a: 'abcd'").to.parseAs(
+      $S($P("a", literalAbcd))
+    );
+    expect("start = @a :'abcd'").to.parseAs(
+      $S($P("a", literalAbcd))
+    );
+    expect("start = @a : 'abcd'").to.parseAs(
+      $S($P("a", literalAbcd))
+    );
     expect("start = 'abcd' @'efgh'").to.parseAs(
       $S(literalAbcd, $P(null, literalEfgh))
     );

web-test/playwright.config.js

@@ -3,6 +3,9 @@
 
 const { defineConfig, devices } = require("@playwright/test");
 
+const isCI = Boolean(process.env.CI);
+const timeout = isCI ? 300000 : 5000;
+
 /**
  * Read environment variables from file.
  * https://github.com/motdotla/dotenv
@@ -17,11 +20,11 @@ module.exports = defineConfig({
   /* Run tests in files in parallel */
   fullyParallel: true,
   /* Fail the build on CI if you accidentally left test.only in the source code. */
-  forbidOnly: Boolean(process.env.CI),
+  forbidOnly: isCI,
   /* Retry on CI only */
-  retries: process.env.CI ? 2 : 0,
+  retries: isCI ? 2 : 0,
   /* Opt out of parallel tests on CI. */
-  workers: process.env.CI ? 1 : undefined,
+  workers: isCI ? 1 : undefined,
   /* Reporter to use. See https://playwright.dev/docs/test-reporters */
   reporter: [
     ["list"],
@@ -35,7 +38,10 @@ module.exports = defineConfig({
     /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
     trace: "on-first-retry",
   },
-
+  timeout,
+  expect: {
+    timeout,
+  },
   /* Configure projects for major browsers */
   projects: [
     {
@@ -78,7 +84,7 @@ module.exports = defineConfig({
   webServer: {
     command: "npm run start",
     url: "http://localhost:8080/",
-    reuseExistingServer: !process.env.CI,
+    reuseExistingServer: !isCI,
   },
 });