Add support for C++ namespaces

src/grammar.hpp

@@ -43,6 +43,7 @@ struct grammar_t {
 
 	std::string header_block;
 	std::string source_block;
+	std::vector<std::string> ns;
 
 	std::vector<std::pair<std::string, std::string>> extra_args;
 

src/output_header.cpp

@@ -67,6 +67,13 @@ void output_header_t::write() {
 		write_line();
 	}
 
+	if (!get_generator()->get_grammar().ns.empty()) {
+		for (const std::string &ns : get_generator()->get_grammar().ns)
+			write_line("namespace ", ns, " {");
+
+		write_line();
+	}
+
 	emit_tokens();
 	write_line();
 
@@ -80,6 +87,13 @@ void output_header_t::write() {
 	write_line_(sig_free());
 	write_line();
 	write_line_(sig_push());
+
+	if (!get_generator()->get_grammar().ns.empty()) {
+		write_line();
+
+		for (size_t i = 0; i < get_generator()->get_grammar().ns.size(); i++)
+			write_line("}");
+	}
 }
 
 };

src/output_source.cpp

@@ -213,6 +213,13 @@ void output_source_t::write() {
 		write_line();
 	}
 
+	if (!get_generator()->get_grammar().ns.empty()) {
+		for (const std::string &ns : get_generator()->get_grammar().ns)
+			write_line("namespace ", ns, " {");
+
+		write_line();
+	}
+
 	emit_types();
 	write_line();
 
@@ -229,6 +236,13 @@ void output_source_t::write() {
 	write_line();
 
 	emit_push();
+
+	if (!get_generator()->get_grammar().ns.empty()) {
+		write_line();
+
+		for (size_t i = 0; i < get_generator()->get_grammar().ns.size(); i++)
+			write_line("}");
+	}
 }
 
 }

src/parse.hpp

@@ -4,6 +4,8 @@
 #include "grammar.hpp"
 
 
+namespace solar {
+
 typedef enum parse_token {
 	TOK_BLOCK = 256,
 	TOK_CHAR = 257,
@@ -23,4 +25,6 @@ typedef struct parse_context parse_context_t;
 parse_context_t * parse_alloc(void *(*alloc_func)(size_t));
 void parse_free(parse_context_t *parser, void (*free_func)(void *));
 
-int parse_push(parse_context_t *parser, int token, const parse_token_value_t *value, __attribute__((unused)) solar::grammar_t *grammar);
+int parse_push(parse_context_t *parser, int token, const parse_token_value_t *value, __attribute__((unused)) grammar_t *grammar);
+
+}

src/parse.y

@@ -1,10 +1,16 @@
+%namespace solar
+
 %header {
 #include "grammar.hpp"
 }
 
 %source {
+namespace solar {
+
 typedef std::vector<std::pair<std::string, bool>> vars_t;
 typedef std::pair<std::vector<solar::symbol_t>, vars_t> rhs_t;
+
+}
 }
 
 
@@ -26,23 +32,26 @@ typedef std::pair<std::vector<solar::symbol_t>, vars_t> rhs_t;
 %type CHAR {unsigned char} c
 
 
+%type namespace {std::vector<std::string> *}
+%destructor namespace delete
+
 %type rhs {rhs_t *}
 %destructor rhs delete
 
 %type action {std::string *}
 %destructor action delete
 
-%type symbol {solar::symbol_t *}
+%type symbol {symbol_t *}
 %destructor symbol delete
 
-%type term {solar::symbol_t *}
+%type term {symbol_t *}
 %destructor term delete
 
 %type varname {std::string *}
 %destructor varname delete
 
 
-%extra_arg {__attribute__((unused)) solar::grammar_t *} grammar
+%extra_arg {__attribute__((unused)) grammar_t *} grammar
 
 
 grammar |=;
@@ -61,6 +70,10 @@ directive |= "%destructor" symbol(sym) varname(name) {
 	grammar->destructors.insert(std::make_pair(*sym, *name));
 }
 
+directive |= "%namespace" namespace(ns) {
+	grammar->ns = *ns;
+}
+
 directive |= "%source" BLOCK(block) {
 	grammar->source_block = *block;
 }
@@ -74,7 +87,7 @@ directive |= "%extra_arg" BLOCK(type) varname(name) {
 }
 
 directive |= SYMBOL(lhs) "|=" rhs(rhs) action(action) {
-	grammar->add_rule({solar::item_t(*lhs, rhs->first), rhs->second, *action});
+	grammar->add_rule({item_t(*lhs, rhs->first), rhs->second, *action});
 }
 
 directive |= SYMBOL(lhs) "|=" '(' CHAR(c1) "..." CHAR(c2) ')' ';' {
@@ -82,7 +95,7 @@ directive |= SYMBOL(lhs) "|=" '(' CHAR(c1) "..." CHAR(c2) ')' ';' {
 	vars.emplace_back();
 
 	for (unsigned int c = c1; c <= c2; c++)
-		grammar->add_rule({solar::item_t(*lhs, {solar::symbol_t::make_char(c)}), vars, std::string()});
+		grammar->add_rule({item_t(*lhs, {symbol_t::make_char(c)}), vars, std::string()});
 }
 
 
@@ -111,7 +124,7 @@ rhs |= rhs(=rhs) symbol(sym) '(' '=' varname(var) ')' {
 
 rhs |= rhs(=rhs) STRING(str) {
 	for (char c : *str) {
-		rhs->first.push_back(solar::symbol_t::make_char(c));
+		rhs->first.push_back(symbol_t::make_char(c));
 		rhs->second.emplace_back();
 	}
 
@@ -124,11 +137,18 @@ action |= BLOCK(=v) [v]
 action |= SQBLOCK(v) [new std::string("return " + *v + ";")]
 
 
-symbol |= SYMBOL(v) [new solar::symbol_t(solar::symbol_t::make_nonterm(*v))]
+namespace |= varname(v) [new std::vector<std::string> {*v}]
+namespace |= namespace(=ns) "::" varname(v) {
+	ns->push_back(*v);
+	return ns;
+}
+
+
+symbol |= SYMBOL(v) [new symbol_t(symbol_t::make_nonterm(*v))]
 symbol |= term(=v) [v]
 
-term |= SYMBOL_UC(v) [new solar::symbol_t(solar::symbol_t::make_term(*v))]
-term |= CHAR(v) [new solar::symbol_t(solar::symbol_t::make_char(v))]
+term |= SYMBOL_UC(v) [new symbol_t(symbol_t::make_term(*v))]
+term |= CHAR(v) [new symbol_t(symbol_t::make_char(v))]
 
 varname |= SYMBOL_UC(=v) [v]
 varname |= SYMBOL(=v) [v]