Merge pull request #2 from OpenVicProject/let-the-games-begin

Initial structural commit

1 files changed, 74 insertions, 0 deletions

diff --git a/src/openvic-dataloader/v2script/Grammar.cpp b/src/openvic-dataloader/v2script/Grammar.cpp
new file mode 100644
index 0000000..ec9fac2
--- /dev/null
+++ b/src/openvic-dataloader/v2script/Grammar.cpp
@@ -0,0 +1,74 @@
+#include <lexy/dsl.hpp>
+#include <openvic-dataloader/v2script/Parser.hpp>
+
+using namespace ovdl::v2script;
+
+// Node Definitions //
+namespace dsl = lexy::dsl;
+
+namespace ovdl::v2script::nodes {
+	struct StatementListBlock;
+
+	static constexpr auto whitespace_specifier = dsl::code_point.range<0x09, 0x0A>() / dsl::lit_cp<0x0D> / dsl::lit_cp<0x20>;
+	static constexpr auto comment_specifier = LEXY_LIT("#") >> dsl::until(dsl::newline).or_eof();
+
+	static constexpr auto data_specifier =
+		dsl::ascii::alpha_digit_underscore /
+		dsl::code_point.range<0x25, 0x27>() / dsl::lit_cp<0x2B> / dsl::code_point.range<0x2D, 0x2E>() /
+		dsl::lit_cp<0x3A> /
+		dsl::lit_cp<0x8A> / dsl::lit_cp<0x8C> / dsl::lit_cp<0x8E> /
+		dsl::lit_cp<0x92> / dsl::lit_cp<0x9A> / dsl::lit_cp<0x9C> / dsl::code_point.range<0x9E, 0x9F>() /
+		dsl::code_point.range<0xC0, 0xD6>() / dsl::code_point.range<0xD8, 0xF6>() / dsl::code_point.range<0xF8, 0xFF>();
+
+	static constexpr auto data_char_class = LEXY_CHAR_CLASS("DataSpecifier", data_specifier);
+
+	struct Identifier {
+		static constexpr auto rule = dsl::identifier(data_char_class);
+	};
+
+	struct StringExpression {
+		static constexpr auto escaped_symbols = lexy::symbol_table<char> //
+													.map<'"'>('"')
+													.map<'\''>('\'')
+													.map<'\\'>('\\')
+													.map<'/'>('/')
+													.map<'b'>('\b')
+													.map<'f'>('\f')
+													.map<'n'>('\n')
+													.map<'r'>('\r')
+													.map<'t'>('\t');
+		static constexpr auto rule = [] {
+			// Arbitrary code points that aren't control characters.
+			auto c = -dsl::unicode::control;
+
+			// Escape sequences start with a backlash.
+			// They either map one of the symbols,
+			// or a Unicode code point of the form uXXXX.
+			auto escape = dsl::backslash_escape //
+							  .symbol<escaped_symbols>()
+							  .rule(dsl::lit_c<'u'> >> dsl::code_point_id<4>);
+			return dsl::quoted(c, escape);
+		}();
+	};
+
+	struct AssignmentStatement {
+		static constexpr auto rule = dsl::p<Identifier> >>
+									 (dsl::equal_sign >>
+											 (dsl::p<Identifier> | dsl::p<StringExpression> | dsl::recurse_branch<StatementListBlock>) |
+										 dsl::else_ >> dsl::return_);
+	};
+
+	struct StatementListBlock {
+		static constexpr auto rule =
+			dsl::curly_bracketed.open() >>
+			dsl::opt(dsl::list(dsl::p<AssignmentStatement>)) + dsl::opt(dsl::semicolon) +
+				dsl::curly_bracketed.close();
+	};
+
+	struct File {
+		// Allow arbitrary spaces between individual tokens.
+		static constexpr auto whitespace = whitespace_specifier | comment_specifier;
+
+		static constexpr auto rule = dsl::terminator(dsl::eof).list(dsl::p<AssignmentStatement>);
+	};
+}