Extract public compiler API into its own header file

include/compiler.h

@@ -0,0 +1,74 @@
+#ifndef tree_sitter_compiler_h
+#define tree_sitter_compiler_h
+
+#include <vector>
+#include <map>
+#include <set>
+#include <string>
+
+namespace tree_sitter {
+    namespace rules {
+        class Rule;
+        class Symbol;
+        
+        struct CharacterRange {
+            char min;
+            char max;
+            CharacterRange(char);
+            CharacterRange(char, char);
+            bool operator==(const CharacterRange &) const;
+            bool operator<(const CharacterRange &) const;
+            std::string to_string() const;
+        };
+    }
+}
+
+namespace std {
+    template<>
+    struct hash<tree_sitter::rules::CharacterRange> {
+        size_t operator()(const tree_sitter::rules::CharacterRange &range) const {
+            return (hash<char>()(range.min) ^ hash<char>()(range.max));
+        }
+    };
+}
+
+namespace tree_sitter {
+    namespace rules {
+        typedef std::shared_ptr<Rule> rule_ptr;
+        std::ostream& operator<<(std::ostream& stream, const rule_ptr &rule);
+        
+        rule_ptr blank();
+        rule_ptr character(const std::set<CharacterRange> &matches);
+        rule_ptr character(const std::set<CharacterRange> &matches, bool);
+        rule_ptr choice(const std::vector<rule_ptr> &rules);
+        rule_ptr pattern(const std::string &value);
+        rule_ptr repeat(const rule_ptr content);
+        rule_ptr seq(const std::vector<rule_ptr> &rules);
+        rule_ptr str(const std::string &value);
+        rule_ptr sym(const std::string &name);
+        rule_ptr aux_sym(const std::string &name);
+    }
+}
+
+namespace tree_sitter {
+    class Grammar {
+        typedef std::map<const std::string, const rules::rule_ptr> rule_map;
+    public:
+        Grammar(std::string start_rule_name, const rule_map &rules);
+        Grammar(std::string start_rule_name, const rule_map &rules, const rule_map &aux_rules);
+        
+        bool operator==(const Grammar &other) const;
+        bool has_definition(const rules::Symbol &symbol) const;
+        const rules::rule_ptr rule(const rules::Symbol &symbol) const;
+        
+        const std::string start_rule_name;
+        const rule_map rules;
+        const rule_map aux_rules;
+    };
+    
+    std::ostream& operator<<(std::ostream &stream, const Grammar &grammar);
+    
+    std::string compile(const Grammar &grammar, std::string name);
+}
+
+#endif