1 files changed, 41 insertions, 0 deletions
diff --git a/prism/internal/regexp.h b/prism/internal/regexp.h
new file mode 100644
index 0000000000..3710c984fc
--- /dev/null
+++ b/prism/internal/regexp.h
@@ -0,0 +1,41 @@
+#ifndef PRISM_INTERNAL_REGEXP_H
+#define PRISM_INTERNAL_REGEXP_H
+
+#include "prism/ast.h"
+#include "prism/parser.h"
+
+/*
+ * Accumulation state for named capture groups found during regexp parsing.
+ * The caller initializes this with the call node and passes it to
+ * pm_regexp_parse. The regexp parser populates match and names as groups
+ * are found.
+ */
+typedef struct {
+    /* The call node wrapping the regular expression node (for =~). */
+    pm_call_node_t *call;
+
+    /* The match write node being built, or NULL if no captures found yet. */
+    pm_match_write_node_t *match;
+
+    /* The list of capture names found so far (for deduplication). */
+    pm_constant_id_list_t names;
+} pm_regexp_name_data_t;
+
+/*
+ * Callback invoked by pm_regexp_parse() for each named capture group found.
+ */
+typedef void (*pm_regexp_name_callback_t)(pm_parser_t *parser, const pm_string_t *name, bool shared, pm_regexp_name_data_t *data);
+
+/*
+ * Parse a regular expression, validate its encoding, and optionally extract
+ * named capture groups. Returns the encoding flags to set on the node.
+ */
+PRISM_EXPORTED_FUNCTION pm_node_flags_t pm_regexp_parse(pm_parser_t *parser, pm_regular_expression_node_t *node, pm_regexp_name_callback_t name_callback, pm_regexp_name_data_t *name_data);
+
+/*
+ * Parse an interpolated regular expression for named capture groups only.
+ * No encoding validation is performed.
+ */
+void pm_regexp_parse_named_captures(pm_parser_t *parser, const uint8_t *source, size_t size, bool shared, bool extended_mode, pm_regexp_name_callback_t name_callback, pm_regexp_name_data_t *name_data);
+
+#endif