diff options
Diffstat (limited to 'src/openvic-dataloader/v2script/SimpleGrammar.hpp')
| -rw-r--r-- | src/openvic-dataloader/v2script/SimpleGrammar.hpp | 75 |
1 files changed, 49 insertions, 26 deletions
diff --git a/src/openvic-dataloader/v2script/SimpleGrammar.hpp b/src/openvic-dataloader/v2script/SimpleGrammar.hpp index d478bdf..2679598 100644 --- a/src/openvic-dataloader/v2script/SimpleGrammar.hpp +++ b/src/openvic-dataloader/v2script/SimpleGrammar.hpp @@ -22,7 +22,18 @@ * DAT-643 */ namespace ovdl::v2script::grammar { + struct ParseOptions { + /// @brief Makes string parsing avoid string escapes + bool NoStringEscape; + }; + + static constexpr ParseOptions NoStringEscapeOption = ParseOptions { true }; + static constexpr ParseOptions StringEscapeOption = ParseOptions { false }; + + template<ParseOptions Options> struct StatementListBlock; + template<ParseOptions Options> + struct AssignmentStatement; /* REQUIREMENTS: DAT-630 */ static constexpr auto whitespace_specifier = lexy::dsl::ascii::blank / lexy::dsl::ascii::newline; @@ -45,6 +56,18 @@ namespace ovdl::v2script::grammar { static constexpr auto data_char_class = LEXY_CHAR_CLASS("DataSpecifier", data_specifier); + 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'); + + template<ParseOptions Options> struct Identifier { static constexpr auto rule = lexy::dsl::identifier(data_char_class); static constexpr auto value = lexy::callback<ast::NodePtr>( @@ -58,27 +81,22 @@ namespace ovdl::v2script::grammar { * DAT-633 * DAT-634 */ + template<ParseOptions Options> 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 = ovdl::detail::lexydsl::make_range<0x20, 0xFF>() - lexy::dsl::ascii::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 = lexy::dsl::backslash_escape // - .symbol<escaped_symbols>(); - return lexy::dsl::delimited(lexy::dsl::position(lexy::dsl::lit_b<'"'>))(c, escape); + if constexpr (Options.NoStringEscape) { + return lexy::dsl::delimited(lexy::dsl::position(lexy::dsl::lit_b<'"'>))(c); + } else { + // Escape sequences start with a backlash. + // They either map one of the symbols, + // or a Unicode code point of the form uXXXX. + auto escape = lexy::dsl::backslash_escape // + .symbol<escaped_symbols>(); + return lexy::dsl::delimited(lexy::dsl::position(lexy::dsl::lit_b<'"'>))(c, escape); + } }(); static constexpr auto value = @@ -90,16 +108,18 @@ namespace ovdl::v2script::grammar { }; /* REQUIREMENTS: DAT-638 */ + template<ParseOptions Options> struct ValueExpression { - static constexpr auto rule = lexy::dsl::p<Identifier> | lexy::dsl::p<StringExpression>; + static constexpr auto rule = lexy::dsl::p<Identifier<Options>> | lexy::dsl::p<StringExpression<Options>>; static constexpr auto value = lexy::forward<ast::NodePtr>; }; + template<ParseOptions Options> struct SimpleAssignmentStatement { static constexpr auto rule = - lexy::dsl::position(lexy::dsl::p<Identifier>) >> - lexy::dsl::equal_sign + - (lexy::dsl::p<ValueExpression> | lexy::dsl::recurse_branch<StatementListBlock>); + lexy::dsl::position(lexy::dsl::p<Identifier<Options>>) >> + (lexy::dsl::equal_sign + + (lexy::dsl::p<ValueExpression<Options>> | lexy::dsl::recurse_branch<StatementListBlock<Options>>)); static constexpr auto value = lexy::callback<ast::NodePtr>( [](const char* pos, auto name, auto&& initalizer) { @@ -108,13 +128,14 @@ namespace ovdl::v2script::grammar { }; /* REQUIREMENTS: DAT-639 */ + template<ParseOptions Options> struct AssignmentStatement { static constexpr auto rule = - lexy::dsl::position(lexy::dsl::p<Identifier>) >> + lexy::dsl::position(lexy::dsl::p<Identifier<Options>>) >> (lexy::dsl::equal_sign >> - (lexy::dsl::p<ValueExpression> | lexy::dsl::recurse_branch<StatementListBlock>) | + (lexy::dsl::p<ValueExpression<Options>> | lexy::dsl::recurse_branch<StatementListBlock<Options>>) | lexy::dsl::else_ >> lexy::dsl::return_) | - lexy::dsl::p<StringExpression>; + lexy::dsl::p<StringExpression<Options>>; static constexpr auto value = lexy::callback<ast::NodePtr>( [](const char* pos, auto name, lexy::nullopt = {}) { @@ -129,11 +150,12 @@ namespace ovdl::v2script::grammar { }; /* REQUIREMENTS: DAT-640 */ + template<ParseOptions Options> struct StatementListBlock { static constexpr auto rule = lexy::dsl::position(lexy::dsl::curly_bracketed.open()) >> - lexy::dsl::opt(lexy::dsl::list(lexy::dsl::p<AssignmentStatement>)) + - lexy::dsl::opt(lexy::dsl::semicolon) >> + (lexy::dsl::opt(lexy::dsl::list(lexy::dsl::recurse_branch<AssignmentStatement<Options>>)) + + lexy::dsl::opt(lexy::dsl::semicolon)) >> lexy::dsl::position(lexy::dsl::curly_bracketed.close()); static constexpr auto value = @@ -156,11 +178,12 @@ namespace ovdl::v2script::grammar { }); }; + template<ParseOptions Options> struct File { // Allow arbitrary spaces between individual tokens. static constexpr auto whitespace = whitespace_specifier | comment_specifier; - static constexpr auto rule = lexy::dsl::position + lexy::dsl::terminator(lexy::dsl::eof).list(lexy::dsl::p<AssignmentStatement>); + static constexpr auto rule = lexy::dsl::position + lexy::dsl::terminator(lexy::dsl::eof).list(lexy::dsl::p<AssignmentStatement<Options>>); static constexpr auto value = lexy::as_list<std::vector<ast::NodePtr>> >> lexy::new_<ast::FileNode, ast::NodePtr>; }; |