up n_m

node_modules/micromark-core-commonmark/dev/lib/hard-break-escape.js

@@ -0,0 +1,62 @@
+/**
+ * @typedef {import('micromark-util-types').Construct} Construct
+ * @typedef {import('micromark-util-types').State} State
+ * @typedef {import('micromark-util-types').TokenizeContext} TokenizeContext
+ * @typedef {import('micromark-util-types').Tokenizer} Tokenizer
+ */
+
+import {markdownLineEnding} from 'micromark-util-character'
+import {codes, types} from 'micromark-util-symbol'
+import {ok as assert} from 'devlop'
+
+/** @type {Construct} */
+export const hardBreakEscape = {
+  name: 'hardBreakEscape',
+  tokenize: tokenizeHardBreakEscape
+}
+
+/**
+ * @this {TokenizeContext}
+ * @type {Tokenizer}
+ */
+function tokenizeHardBreakEscape(effects, ok, nok) {
+  return start
+
+  /**
+   * Start of a hard break (escape).
+   *
+   * ```markdown
+   * > | a\
+   *      ^
+   *   | b
+   * ```
+   *
+   * @type {State}
+   */
+  function start(code) {
+    assert(code === codes.backslash, 'expected `\\`')
+    effects.enter(types.hardBreakEscape)
+    effects.consume(code)
+    return after
+  }
+
+  /**
+   * After `\`, at eol.
+   *
+   * ```markdown
+   * > | a\
+   *       ^
+   *   | b
+   * ```
+   *
+   *  @type {State}
+   */
+  function after(code) {
+    if (markdownLineEnding(code)) {
+      effects.exit(types.hardBreakEscape)
+      return ok(code)
+    }
+
+    return nok(code)
+  }
+}