feat(parser): implements regex literal parser

2 files changed, 15 insertions, 1 deletions

diff --git a/src/parser/index.ts b/src/parser/index.ts
index a336b83..7f0e945 100644
--- a/src/parser/index.ts
+++ b/src/parser/index.ts
@@ -129,9 +129,22 @@ const stringLiteral: Parser<Literal> = mapTo(
   s => Literal.String(s.join('')),
 )
 
+const REGEX_FLAGS = ['m', 'g', 'i', 'd', 's', 'u', 'y']
+const regexDelimiter = prefixed(optional(matchChar('\\')), matchChar('/'))
+const regexLiteral: Parser<Literal> = mapTo(
+  prefixed(
+    regexDelimiter,
+    pair(
+      manyTill(satisfyChar(_ => true), regexDelimiter),
+      many0(satisfyChar(c => REGEX_FLAGS.includes(c)))
+    ),
+  ),
+  ([rs, flags]) => Literal.RegExp(new RegExp(rs.join(''), flags.join(''))),
+)
+
 const literalP: Parser<Literal> = delimited(
   whitespaces0,
-  or([booleanLiteral, numberLiteral, stringLiteral]),
+  or([booleanLiteral, numberLiteral, stringLiteral, regexLiteral]),
   whitespaces0,
 )
 
diff --git a/src/types.ts b/src/types.ts
index dd40ce9..f02fca6 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -7,6 +7,7 @@ export type index = number
 
 export type Literal = Union<{
   String: string
+  RegExp: RegExp
   Number: number
   Boolean: boolean
 }>