diff options
| -rw-r--r-- | .gitignore | 2 | ||||
| -rw-r--r-- | Cargo.toml | 10 | ||||
| -rw-r--r-- | README.md | 5 | ||||
| -rw-r--r-- | src/cpp.pest | 1270 | ||||
| -rw-r--r-- | src/lib.rs | 14 |
5 files changed, 1301 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..96ef6c0 --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +/target +Cargo.lock diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..cfafa2f --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,10 @@ +[package] +name = "cpp-parse" +version = "0.1.0" +edition = "2018" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] +pest = "2.1" +pest_derive = "2.1" diff --git a/README.md b/README.md new file mode 100644 index 0000000..ef66a48 --- /dev/null +++ b/README.md @@ -0,0 +1,5 @@ +# cpp-parse + +a whole ass C++ parser + +[C++14 spec](https://timsong-cpp.github.io/cppwp/n4140/gram) diff --git a/src/cpp.pest b/src/cpp.pest new file mode 100644 index 0000000..0b12c23 --- /dev/null +++ b/src/cpp.pest @@ -0,0 +1,1270 @@ +keyword = { + "alignas" | + "continue" | + "friend" | + "register" | + "true" | + "alignof" | + "decltype" | + "goto" | + "reinterpret_cast" | + "try" | + "asm" | + "default" | + "if" | + "return" | + "typedef" | + "auto" | + "delete" | + "inline" | + "short" | + "typeid" | + "bool" | + "do" | + "int" | + "signed" | + "typename" | + "break" | + "double" | + "long" | + "sizeof" | + "union" | + "case" | + "dynamic_cast" | + "mutable" | + "static" | + "unsigned" | + "catch" | + "else" | + "namespace" | + "static_assert" | + "using" | + "char" | + "enum" | + "new" | + "static_cast" | + "virtual" | + "char16_t" | + "explicit" | + "noexcept" | + "struct" | + "void" | + "char32_t" | + "export" | + "nullptr" | + "switch" | + "volatile" | + "class" | + "extern" | + "operator" | + "template" | + "wchar_t" | + "const" | + "false" | + "private" | + "this" | + "while" | + "constexpr" | + "float" | + "protected" | + "thread_local" | + "const_cast" | + "for" | + "public" | + "throw" +} +punctuator = { + preprocessing_op_or_punc +} + +hex_quad = @{ + hexadecimal_digit ~ hexadecimal_digit ~ hexadecimal_digit ~ hexadecimal_digit +} +universal_character_name = @{ + ("\\u" ~ hex_quad) | + ("\\U" ~ hex_quad ~ hex_quad) +} +preprocessing_token = @{ + header_name | + identifier | + pp_number | + character_literal | + user_defined_character_literal | + string_literal | + user_defined_string_literal | + preprocessing_op_or_punc | + (!WHITE_SPACE ~ ANY) +} +token = @{ + identifier | + keyword | + literal | + operator | + punctuator +} +header_name = @{ + ("<" ~ h_char_sequence ~ ">") | + ("\"" ~ q_char_sequence ~ "\"") +} +h_char_sequence = @{ + h_char+ +} +h_char = @{ + !(NEWLINE | + ">") ~ ANY +} +q_char_sequence = @{ + q_char+ +} +q_char = @{ + !(NEWLINE | + "\"") ~ ANY +} +pp_number = @{ + "."? ~ digit ~ ( + digit | + identifier_nondigit | + ("'" ~ digit) | + ("'" ~ nondigit) | + ("e" ~ sign) | + ("E" ~ sign) | + "." + )* +} +identifier = @{ + identifier_nondigit ~ (identifier_nondigit | digit)* +} +identifier_nondigit = @{ + nondigit | + universal_character_name + // TODO "other implementation-defined characters" +} +nondigit = { ('a'..'z' | 'A'..'Z' | "_") } +digit = { '0'..'9' } +preprocessing_op_or_punc = { + // sorted by length bc PEG ordered choice + "delete" | + "and_eq" | + "bitand" | + "not_eq" | + "xor_eq" | + "bitor" | + "compl" | + "or_eq" | + "%:%:" | + "..." | + "new" | + ">>=" | + "<<=" | + "->*" | + "and" | + "not" | + "xor" | + "##" | + "<:" | + ":>" | + "<%" | + "%>" | + "%:" | + "::" | + ".*" | + "+=" | + "-=" | + "*=" | + "/=" | + "%=" | + "^=" | + "&=" | + "|=" | + "<<" | + ">>" | + "==" | + "!=" | + "<=" | + ">=" | + "&&" | + "||" | + "++" | + "--" | + "->" | + "or" | + "{" | + "}" | + "[" | + "]" | + "#" | + "(" | + ")" | + ";" | + ":" | + "?" | + "." | + "+" | + "-" | + "*" | + "/" | + "%" | + "^" | + "&" | + "|" | + "~" | + "!" | + "=" | + "<" | + ">" | + "," +} +literal = { + integer_literal | + character_literal | + floating_literal | + string_literal | + boolean_literal | + pointer_literal | + user_defined_literal +} +integer_literal = @{ + (decimal_literal ~ integer_suffix?) | + (octal_literal ~ integer_suffix?) | + (hexadecimal_literal ~ integer_suffix?) | + (binary_literal ~ integer_suffix?) +} +decimal_literal = @{ + nonzero_digit ~ ("'"? ~ digit)* +} +octal_literal = @{ + "0" ~ ("'"? ~ octal_digit)* +} +hexadecimal_literal = @{ + ("0x" | "0X") ~ hexadecimal_digit ~ ("'"? ~ hexadecimal_digit)* +} +binary_literal = @{ + ("0b" | "0B") ~ binary_digit ~ ("'"? ~ binary_digit)* +} +nonzero_digit = { + '1'..'9' +} +octal_digit = { + '0'..'7' +} +hexadecimal_digit = { + '0'..'9' | + 'a'..'f' | + 'A'..'F' +} +binary_digit = { + '0'..'1' +} +integer_suffix = @{ + (unsigned_suffix ~ long_long_suffix?) | + (unsigned_suffix ~ long_suffix?) | + (long_long_suffix ~ unsigned_suffix?) | + (long_suffix ~ unsigned_suffix?) +} +unsigned_suffix = { + "u" | "U" +} +long_suffix = { + "l" | "L" +} +long_long_suffix = { + "ll" | "LL" +} +character_literal = @{ + ("u" | "U" | "L")? ~ "'" ~ c_char_sequence ~ "'" +} +c_char_sequence = @{ + c_char+ +} +c_char = @{ + (!("'" | "\\" | NEWLINE) ~ ANY) | + escape_sequence | + universal_character_name +} +escape_sequence = { + simple_escape_sequence | + octal_escape_sequence | + hexadecimal_escape_sequence +} +simple_escape_sequence = { + "\\'" | "\\\"" | "\\?" | "\\\\" | + "\\a" | "\\b" | "\\f" | "\\n" | "\\r" | "\\t" | "\\v" +} +octal_escape_sequence = @{ + "\\" ~ octal_digit ~ octal_digit? ~ octal_digit? +} +hexadecimal_escape_sequence = @{ + "\\x" ~ hexadecimal_digit+ +} +floating_literal = @{ + (fractional_constant ~ exponent_part? ~ floating_suffix?) | + (digit_sequence ~ exponent_part ~ floating_suffix?) +} +fractional_constant = @{ + (digit_sequence? ~ "." ~ digit_sequence) | + (digit_sequence ~ ".") +} +exponent_part = @{ + ("e" | "E") ~ sign? ~ digit_sequence +} +sign = { + "+" | "-" +} +digit_sequence = @{ + digit ~ ("'"? ~ digit)* +} +floating_suffix = { + "f" | "l" | "F" | "L" +} +string_literal = @{ + encoding_prefix? ~ (("\"" ~ s_char_sequence? ~ "\"") | ("R" ~ raw_string)) +} +encoding_prefix = { + "u8" | + "u" | + "U" | + "L" +} +s_char_sequence = @{ + s_char+ +} +s_char = @{ + (!("\"" | "\\" | NEWLINE) ~ ANY) | + escape_sequence | + universal_character_name +} +raw_string = @{ + "\"" ~ d_char_sequence? ~ "(" ~ r_char_sequence? ~ ")" ~ d_char_sequence? ~ "\"" +} +r_char_sequence = @{ + r_char+ +} +r_char = @{ + // TODO what uhhh the fuck + ANY +} +d_char_sequence = @{ + d_char+ +} +d_char = @{ + !(" " | "(" | ")" | "\\" | "\t" | "\u{0B}" | "\r" | "\n") ~ ANY +} +boolean_literal = { + "false" | + "true" +} +pointer_literal = { + "nullptr" +} +user_defined_literal = { + user_defined_integer_literal | + user_defined_floating_literal | + user_defined_string_literal | + user_defined_character_literal +} +user_defined_integer_literal = @{ + (decimal_literal | octal_literal | hexadecimal_literal | binary_literal) ~ ud_suffix +} +user_defined_floating_literal = @{ + (fractional_constant ~ exponent_part? ~ ud_suffix) | + (digit_sequence ~ exponent_part ~ ud_suffix) +} +user_defined_string_literal = @{ + string_literal ~ ud_suffix +} +user_defined_character_literal = @{ + character_literal ~ ud_suffix +} +ud_suffix = { + identifier +} + +translation_unit = { + SOI ~ declaration_seq? ~ EOI +} + +primary_expression = { + literal | + "this" | + ("(" ~ expression ~ ")") | + id_expression | + lambda_expression +} +id_expression = { + unqualified_id | + qualified_id +} +unqualified_id = { + identifier | + operator_function_id | + conversion_function_id | + literal_operator_id | + ("~" ~ class_name) | + ("~" ~ decltype_specifier) | + template_id +} +qualified_id = { + nested_name_specifier ~ "template"? ~ unqualified_id +} +nested_name_specifier = { + ( + "::" | + (type_name ~ "::") | + (namespace_name ~ "::") | + (decltype_specifier ~ "::") + ) ~ ( + (identifier ~ "::") | + ("template"? ~ simple_template_id ~ "::") + )* +} +lambda_expression = { + lambda_introducer ~ lambda_declarator? ~ compound_statement +} +lambda_introducer = { + "[" ~ lambda_capture? ~ "]" +} +lambda_capture = { + capture_default | + capture_list | + (capture_default ~ "," ~ capture_list) +} +capture_default = { + "&" | + "=" +} +capture_list = { + capture ~ "..."? ~ ("," ~ capture ~ "..."?)* +} +capture = { + simple_capture | + init_capture +} +simple_capture = { + identifier | + ("&" ~ identifier) | + "this" +} +init_capture = { + "&"? ~ identifier ~ initializer +} +lambda_declarator = { + ("(" ~ parameter_declaration_clause ~ ")" ~ "mutable"?) | + (exception_specification? ~ attribute_specifier_seq? ~ trailing_return_type?) +} +postfix_expression = { + ( + primary_expression | + (simple_type_specifier ~ "(" ~ expression_list? ~ ")") | + (typename_specifier ~ "(" ~ expression_list? ~ ")") | + (simple_type_specifier ~ braced_init_list) | + (typename_specifier ~ braced_init_list) | + ("dynamic_cast" ~ "<" ~ type_id ~ ">" ~ "(" ~ expression ~ ")") | + ("static_cast" ~ "<" ~ type_id ~ ">" ~ "(" ~ expression ~ ")") | + ("reinterpret_cast" ~ "<" ~ type_id ~ ">" ~ "(" ~ expression ~ ")") | + ("const_cast" ~ "<" ~ type_id ~ ">" ~ "(" ~ expression ~ ")") | + ("typeid" ~ "(" ~ expression ~ ")") | + ("typeid" ~ "(" ~ type_id ~ ")") + ) ~ ( + ("[" ~ expression ~ "]") | + ("[" ~ braced_init_list ~ "]") | + ("(" ~ expression_list? ~ ")") | + ("." ~ "template"? ~ id_expression) | + ("->" ~ "template"? ~ id_expression) | + ("." ~ pseudo_destructor_name) | + ("->" ~ pseudo_destructor_name) | + "++" | + "--" + )* +} +expression_list = { + initializer_list +} +pseudo_destructor_name = { + (nested_name_specifier? ~ type_name ~ "::" ~ "~" ~ type_name) | + (nested_name_specifier ~ "template" ~ simple_template_id ~ "::" ~ "~" ~ type_name) | + (nested_name_specifier? ~ "~" ~ type_name) | + ("~" ~ decltype_specifier) +} +unary_expression = { + postfix_expression | + ("++" ~ cast_expression) | + ("--" ~ cast_expression) | + (unary_operator ~ cast_expression) | + ("sizeof" ~ unary_expression) | + ("sizeof" ~ "(" ~ type_id ~ ")") | + ("sizeof" ~ "..." ~ "(" ~ identifier ~ ")") | + ("alignof" ~ "(" ~ type_id ~ ")") | + noexcept_expression | + new_expression | + delete_expression +} +unary_operator = { + "*" | "&" | "+" | "-" | "!" | "~" +} +new_expression = { + "::"? ~ "new" ~ new_placement? ~ (new_type_id | ("(" ~ type_id ~ ")")) ~ new_initializer? +} +new_placement = { + "(" ~ expression_list ~ ")" +} +new_type_id = { + type_specifier_seq ~ new_declarator? +} +new_declarator = { + (ptr_operator ~ new_declarator?) | + noptr_new_declarator +} +noptr_new_declarator = { + "[" ~ expression ~ "]" ~ attribute_specifier_seq? ~ ("[" ~ constant_expression ~ "]" ~ attribute_specifier_seq?)* +} +new_initializer = { + ("(" ~ expression_list? ~ ")") | + braced_init_list +} +delete_expression = { + "::"? ~ "delete" ~ ("[" ~ "]")? ~ cast_expression +} +noexcept_expression = { + "noexcept" ~ "(" ~ expression ~ ")" +} +cast_expression = { + unary_expression | + ("(" ~ type_id ~ ")" ~ cast_expression) +} +pm_expression = { + cast_expression ~ ((".*" | "->*") ~ cast_expression)* +} +multiplicative_expression = { + pm_expression ~ (("*" | "/" | "%") ~ pm_expression)* +} +additive_expression = { + multiplicative_expression ~ (("+" | "-") ~ multiplicative_expression)* +} +shift_expression = { + additive_expression ~ (("<<" | ">>") ~ additive_expression)* +} +relational_expression = { + shift_expression ~ (("<=" | ">=" | "<" | ">") ~ shift_expression)* +} +equality_expression = { + relational_expression ~ (("==" | "!=") ~ relational_expression)* +} +and_expression = { + equality_expression ~ ("&" ~ equality_expression)* +} +exclusive_or_expression = { + and_expression ~ ("^" ~ and_expression)* +} +inclusive_or_expression = { + exclusive_or_expression ~ ("|" ~ exclusive_or_expression)* +} +logical_and_expression = { + inclusive_or_expression ~ ("&&" ~ inclusive_or_expression)* +} +logical_or_expression = { + logical_and_expression ~ ("||" ~ logical_and_expression)* +} +conditional_expression = { + logical_or_expression | + (logical_or_expression ~ "?" ~ expression ~ ":" ~ assignment_expression) +} +assignment_expression = { + conditional_expression | + (logical_or_expression ~ assignment_operator ~ initializer_clause) | + throw_expression +} +assignment_operator = { + "=" | "*=" | "/=" | "%=" | "+=" | "-=" | ">>=" | "<<=" | "&=" | "^=" | "|=" +} +expression = { + assignment_expression ~ ("," ~ assignment_expression)* +} +constant_expression = { + conditional_expression +} + +statement = { + labeled_statement | + (attribute_specifier_seq? ~ expression_statement) | + (attribute_specifier_seq? ~ compound_statement) | + (attribute_specifier_seq? ~ selection_statement) | + (attribute_specifier_seq? ~ iteration_statement) | + (attribute_specifier_seq? ~ jump_statement) | + declaration_statement | + (attribute_specifier_seq? ~ try_block) +} +labeled_statement = { + (attribute_specifier_seq? ~ identifier ~ ":" ~ statement) | + (attribute_specifier_seq? ~ "case" ~ constant_expression ~ ":" ~ statement) | + (attribute_specifier_seq? ~ "default" ~ ":" ~ statement) +} +expression_statement = { + expression? ~ ";" +} +compound_statement = { + "{" ~ statement_seq? ~ "}" +} +statement_seq = { + statement+ +} +selection_statement = { + ("if" ~ "(" ~ condition ~ ")" ~ statement ~ ("else" ~ statement)?) | + ("switch" ~ "(" ~ condition ~ ")" ~ statement) +} +condition = { + expression | + (attribute_specifier_seq? ~ decl_specifier_seq ~ declarator ~ "=" ~ initializer_clause) | + (attribute_specifier_seq? ~ decl_specifier_seq ~ declarator ~ braced_init_list) +} +iteration_statement = { + ("while" ~ "(" ~ condition ~ ")" ~ statement) | + ("do" ~ statement ~ "while" ~ "(" ~ expression ~ ")" ~ ";") | + ("for" ~ "(" ~ ((for_init_statement ~ condition? ~ ";" ~ expression?) | (for_range_declaration ~ ":" ~ for_range_initializer)) ~ ")" ~ statement) +} +for_init_statement = { + expression_statement | + simple_declaration +} +for_range_declaration = { + attribute_specifier_seq? ~ decl_specifier_seq ~ declarator +} +for_range_initializer = { + expression | + braced_init_list +} +jump_statement = { + ("break" ~ ";") | + ("continue" ~ ";") | + ("return" ~ (braced_init_list | expression?) ~ ";") | + ("goto" ~ identifier ~ ";") +} +declaration_statement = { + block_declaration +} + +declaration_seq = { + declaration+ +} +declaration = { + block_declaration | + function_definition | + template_declaration | + explicit_instantiation | + explicit_specialization | + linkage_specification | + namespace_definition | + empty_declaration | + attribute_declaration +} +block_declaration = { + simple_declaration | + asm_definition | + namespace_alias_definition | + using_declaration | + using_directive | + static_assert_declaration | + alias_declaration | + opaque_enum_declaration +} +alias_declaration = { + "using" ~ identifier ~ attribute_specifier_seq? ~ "=" ~ type_id ~ ";" +} +simple_declaration = { + (decl_specifier_seq? ~ init_declarator_list? ~ ";") | + (attribute_specifier_seq ~ decl_specifier_seq? ~ init_declarator_list ~ ";") +} +static_assert_declaration = { + "static_assert" ~ "(" ~ constant_expression ~ "," ~ string_literal ~ ")" ~ ";" +} +empty_declaration = { + ";" +} +attribute_declaration = { + attribute_specifier_seq ~ ";" +} +decl_specifier = { + storage_class_specifier | + type_specifier | + function_specifier | + "friend" | + "typedef" | + "constexpr" +} +decl_specifier_seq = { + (decl_specifier ~ attribute_specifier_seq?)+ +} +storage_class_specifier = { + "register" | + "static" | + "thread_local" | + "extern" | + "mutable" +} +function_specifier = { + "inline" | + "virtual" | + "explicit" +} +typedef_name = { + identifier +} +type_specifier = { + trailing_type_specifier | + class_specifier | + enum_specifier +} +trailing_type_specifier = { + simple_type_specifier | + elaborated_type_specifier | + typename_specifier | + cv_qualifier +} +type_specifier_seq = { + (trailing_type_specifier ~ attribute_specifier_seq?)+ +} +trailing_type_specifier_seq = { + trailing_type_specifier+ ~ attribute_specifier_seq? +} +simple_type_specifier = { + (nested_name_specifier? ~ type_name) | + (nested_name_specifier ~ "template" ~ simple_template_id) | + "char" | + "char16_t" | + "char32_t" | + "wchar_t" | + "bool" | + "short" | + "int" | + "long" | + "signed" | + "unsigned" | + "float" | + "double" | + "void" | + "auto" | + decltype_specifier +} +type_name = { + class_name | + enum_name | + typedef_name | + simple_template_id +} +decltype_specifier = { + "decltype" ~ "(" ~ (expression | "auto") ~ ")" +} +elaborated_type_specifier = { + (class_key ~ attribute_specifier_seq? ~ nested_name_specifier? ~ identifier) | + (class_key ~ simple_template_id) | + (class_key ~ nested_name_specifier ~ "template"? ~ simple_template_id) | + ("enum" ~ nested_name_specifier? ~ identifier) +} +enum_name = { + identifier +} +enum_specifier = { + enum_head ~ "{" ~ enumerator_list? ~ ","? ~ "}" +} +enum_head = { + enum_key ~ attribute_specifier_seq? ~ ((nested_name_specifier ~ identifier ~ enum_base?) | (identifier? ~ enum_base?)) +} +opaque_enum_declaration = { + enum_key ~ attribute_specifier_seq? ~ identifier ~ enum_base? ~ ";" +} +enum_key = { + "enum" ~ ("class" | "struct")? +} +enum_base = { + ":" ~ type_specifier_seq +} +enumerator_list = { + enumerator_definition ~ ("," ~ enumerator_definition)* +} +enumerator_definition = { + enumerator ~ ("=" ~ constant_expression)? +} +enumerator = { + identifier +} +namespace_name = { + original_namespace_name | + namespace_alias +} +original_namespace_name = { + identifier +} +namespace_definition = { + named_namespace_definition | + unnamed_namespace_definition +} +named_namespace_definition = { + original_namespace_definition | + extension_namespace_definition +} +original_namespace_definition = { + "inline"? ~ "namespace" ~ identifier ~ "{" ~ namespace_body ~ "}" +} +extension_namespace_definition = { + "inline"? ~ "namespace" ~ original_namespace_name ~ "{" ~ namespace_body ~ "}" +} +unnamed_namespace_definition = { + "inline"? ~ "namespace" ~ "{" ~ namespace_body ~ "}" +} +namespace_body = { + declaration_seq? +} +namespace_alias = { + identifier +} +namespace_alias_definition = { + "namespace" ~ identifier ~ "=" ~ qualified_namespace_specifier ~ ";" +} +qualified_namespace_specifier = { + nested_name_specifier? ~ namespace_name +} +using_declaration = { + ("using" ~ "typename"? ~ nested_name_specifier ~ unqualified_id ~ ";") | + ("using" ~ "::" ~ unqualified_id ~ ";") +} +using_directive = { + attribute_specifier_seq? ~ "using" ~ "namespace" ~ nested_name_specifier? ~ namespace_name ~ ";" +} +asm_definition = { + "asm" ~ "(" ~ string_literal ~ ")" ~ ";" +} +linkage_specification = { + "extern" ~ string_literal ~ (("{" ~ declaration_seq? ~ "}") | declaration) +} +attribute_specifier_seq = { + attribute_specifier* +} +attribute_specifier = { + ("[" ~ "[" ~ attribute_list ~ "]" ~ "]") | + alignment_specifier +} +alignment_specifier = { + "alignas" ~ "(" ~ (type_id | constant_expression) ~ "..."? ~ ")" +} +attribute_list = { + attribute? ~ "..."? ~ ("," ~ attribute? ~ "..."?)* +} +attribute = { + attribute_token ~ attribute_argument_clause? +} +attribute_token = { + identifier | + attribute_scoped_token +} +attribute_scoped_token = { + attribute_namespace ~ "::" ~ identifier +} +attribute_namespace = { + identifier +} +attribute_argument_clause = { + "(" ~ balanced_token_seq ~ ")" +} +balanced_token_seq = { + balanced_token* +} +balanced_token = { + ("(" ~ balanced_token_seq ~ ")") | + ("[" ~ balanced_token_seq ~ "]") | + ("{" ~ balanced_token_seq ~ "}") | + (!("(" | ")" | "[" | "]" | "{" | "}") ~ token) +} + +init_declarator_list = { + init_declarator ~ ("," ~ init_declarator)* +} +init_declarator = { + declarator ~ initializer? +} +declarator = { + ptr_declarator | + (noptr_declarator ~ parameters_and_qualifiers ~ trailing_return_type) +} +ptr_declarator = { + ptr_operator* ~ noptr_declarator +} +noptr_declarator = { + (declarator_id ~ attribute_specifier_seq? ~ (parameters_and_qualifiers | ("[" ~ constant_expression? ~ "]" ~ attribute_specifier_seq?))*) | + ("(" ~ ptr_declarator ~ ")") +} +parameters_and_qualifiers = { + "(" ~ parameter_declaration_clause ~ ")" ~ cv_qualifier_seq? ~ ref_qualifier? ~ exception_specification? ~ attribute_specifier_seq? +} +trailing_return_type = { + "->" ~ trailing_type_specifier_seq ~ abstract_declarator? +} +ptr_operator = { + ("*" ~ attribute_specifier_seq? ~ cv_qualifier_seq?) | + ("&&" ~ attribute_specifier_seq?) | + ("&" ~ attribute_specifier_seq?) | + (nested_name_specifier ~ "*" ~ attribute_specifier_seq? ~ cv_qualifier_seq?) +} +cv_qualifier_seq = { + cv_qualifier+ +} +cv_qualifier = { + "const" | + "volatile" +} +ref_qualifier = { + "&" | + "&&" +} +declarator_id = { + "..."? ~ id_expression +} +type_id = { + type_specifier_seq ~ abstract_declarator? +} +abstract_declarator = { + (noptr_abstract_declarator? ~ parameters_and_qualifiers ~ trailing_return_type) | + abstract_pack_declarator | + ptr_abstract_declarator +} +ptr_abstract_declarator = { + ptr_operator* ~ noptr_abstract_declarator? +} +noptr_abstract_declarator = { + ("(" ~ ptr_abstract_declarator ~ ")")? ~ (parameters_and_qualifiers | ("[" ~ constant_expression? ~ "]" ~ attribute_specifier_seq?))* +} +abstract_pack_declarator = { + ptr_operator* ~ noptr_abstract_pack_declarator +} +noptr_abstract_pack_declarator = { + "..." ~ (parameters_and_qualifiers | ("[" ~ constant_expression? ~ "]" ~ attribute_specifier_seq?))* +} +parameter_declaration_clause = { + parameter_declaration_list? ~ ","? ~ "..."? +} +parameter_declaration_list = { + parameter_declaration ~ ("," ~ parameter_declaration)* +} +parameter_declaration = { + attribute_specifier_seq? ~ decl_specifier_seq ~ (declarator | abstract_declarator?) ~ ("=" ~ initializer_clause)? +} +function_definition = { + attribute_specifier_seq? ~ decl_specifier_seq? ~ declarator ~ virt_specifier_seq? ~ function_body +} +function_body = { + (ctor_initializer? ~ compound_statement) | + function_try_block | + ("=" ~ "default" ~ ";") | + ("=" ~ "delete" ~ ";") +} +initializer = { + brace_or_equal_initializer | + ("(" ~ expression_list ~ ")") +} +brace_or_equal_initializer = { + ("=" ~ initializer_clause) | + braced_init_list +} +initializer_clause = { + assignment_expression | + braced_init_list +} +initializer_list = { + initializer_clause ~ "..."? ~ ("," ~ initializer_clause ~ "..."?)* +} +braced_init_list = { + "{" ~ initializer_list? ~ ","? ~ "}" +} + +class_name = { + identifier | + simple_template_id +} +class_specifier = { + class_head ~ "{" ~ member_specification? ~ "}" +} +class_head = { + class_key ~ attribute_specifier_seq? ~ ((class_head_name ~ class_virt_specifier? ~ base_clause?) | (base_clause?)) +} +class_head_name = { + nested_name_specifier? ~ class_name +} +class_virt_specifier = { + "final" +} +class_key = { + "class" | + "struct" | + "union" +} +member_specification = { + (member_declaration | (access_specifier ~ ":"))+ +} +member_declaration = { + (attribute_specifier_seq? ~ decl_specifier_seq? ~ member_declarator_list? ~ ";") | + function_definition | + using_declaration | + static_assert_declaration | + template_declaration | + alias_declaration | + empty_declaration +} +member_declarator_list = { + member_declarator ~ ("," ~ member_declarator)* +} +member_declarator = { + (declarator ~ virt_specifier_seq? ~ pure_specifier?) | + (declarator ~ brace_or_equal_initializer?) | + (identifier? ~ attribute_specifier_seq? ~ ":" ~ constant_expression) +} +virt_specifier_seq = { + virt_specifier+ +} +virt_specifier = { + "override" | + "final" +} +pure_specifier = { + "=" ~ "0" +} + +base_clause = { + ":" ~ base_specifier_list +} +base_specifier_list = { + base_specifier ~ "..."? ~ ("," ~ base_specifier ~ "..."?)* +} +base_specifier = { + attribute_specifier_seq? ~ (("virtual" ~ access_specifier?) | (access_specifier ~ "virtual"?))? ~ base_type_specifier +} +class_or_decltype = { + (nested_name_specifier? ~ class_name) | + decltype_specifier +} +base_type_specifier = { + class_or_decltype +} +access_specifier = { + "private" | + "protected" | + "public" +} + +conversion_function_id = { + "operator" ~ conversion_type_id +} +conversion_type_id = { + type_specifier_seq ~ conversion_declarator? +} +conversion_declarator = { + ptr_operator+ +} +ctor_initializer = { + ":" ~ mem_initializer_list +} +mem_initializer_list = { + mem_initializer ~ "..."? ~ ("," ~ mem_initializer ~ "..."?)* +} +mem_initializer = { + mem_initializer_id ~ (("(" ~ expression_list? ~ ")") | braced_init_list) +} +mem_initializer_id = { + class_or_decltype | + identifier +} + +operator_function_id = { + "operator" ~ operator +} +operator = { + // sorted by length bc PEG ordered choice + "delete[]" | + "delete" | + "new[]" | + "new" | + ">>=" | + "<<=" | + "->*" | + "+=" | + "-=" | + "*=" | + "/=" | + "%=" | + "^=" | + "&=" | + "|=" | + "<<" | + ">>" | + "==" | + "!=" | + "<=" | + ">=" | + "&&" | + "||" | + "++" | + "--" | + "->" | + ("[" ~ "]") | + ("(" ~ ")") | + "+" | + "-" | + "*" | + "/" | + "%" | + "^" | + "&" | + "|" | + "~" | + "!" | + "=" | + "<" | + ">" | + "," +} +literal_operator_id = { + "operator" ~ ((string_literal ~ identifier) | user_defined_string_literal) +} + +template_declaration = { + "template" ~ "<" ~ template_parameter_list ~ ">" ~ declaration +} +template_parameter_list = { + template_parameter ~ ("," ~ template_parameter)* +} +template_parameter = { + type_parameter | + parameter_declaration +} +type_parameter = { + ("class" ~ "..."? ~ identifier?) | + ("class" ~ identifier? ~ "=" ~ type_id) | + ("typename" ~ "..."? ~ identifier?) | + ("typename" ~ identifier? ~ "=" ~ type_id) | + ("template" ~ "<" ~ template_parameter_list ~ ">" ~ "class" ~ "..."? ~ identifier?) | + ("template" ~ "<" ~ template_parameter_list ~ ">" ~ "class" ~ identifier? ~ "=" ~ id_expression) +} +simple_template_id = { + template_name ~ "<" ~ template_argument_list? ~ ">" +} +template_id = { + simple_template_id | + (operator_function_id ~ "<" ~ template_argument_list? ~ ">") | + (literal_operator_id ~ "<" ~ template_argument_list? ~ ">") +} +template_name = { + identifier +} +template_argument_list = { + template_argument ~ "..."? ~ ("," ~ template_argument ~ "..."?)* +} +template_argument = { + constant_expression | + type_id | + id_expression +} +typename_specifier = { + "typename" ~ nested_name_specifier ~ (identifier | ("template"? ~ simple_template_id)) +} +explicit_instantiation = { + "extern"? ~ "template" ~ declaration +} +explicit_specialization = { + "template" ~ "<" ~ ">" ~ declaration +} + +try_block = { + "try" ~ compound_statement ~ handler_seq +} +function_try_block = { + "try" ~ ctor_initializer? ~ compound_statement ~ handler_seq +} +handler_seq = { + handler+ +} +handler = { + "catch" ~ "(" ~ exception_declaration ~ ")" ~ compound_statement +} +exception_declaration = { + (attribute_specifier_seq? ~ type_specifier_seq ~ (declarator | abstract_declarator?)) | + "..." +} +throw_expression = { + "throw" ~ assignment_expression? +} +exception_specification = { + dynamic_exception_specification | + noexcept_specification +} +dynamic_exception_specification = { + "throw" ~ "(" ~ type_id_list? ~ ")" +} +type_id_list = { + type_id ~ "..."? ~ ("," ~ type_id ~ "..."?)* +} +noexcept_specification = { + "noexcept" ~ ("(" ~ constant_expression ~ ")")? +} + +preprocessing_file = { + SOI ~ group? ~ EOI +} +group = { + group_part+ +} +group_part = { + if_section | + control_line | + text_line | + ("#" ~ non_directive) +} +if_section = { + if_group ~ elif_groups? ~ else_group? ~ endif_line +} +if_group = { + ("#" ~ "if" ~ constant_expression ~ NEWLINE ~ group?) | + ("#" ~ "ifdef" ~ identifier ~ NEWLINE ~ group?) | + ("#" ~ "ifndef" ~ identifier ~ NEWLINE ~ group?) +} +elif_groups = { + elif_group+ +} +elif_group = { + "#" ~ "elif" ~ constant_expression ~ NEWLINE ~ group? +} +else_group = { + "#" ~ "else" ~ NEWLINE ~ group? +} +endif_line = { + "#" ~ "endif" ~ NEWLINE +} +control_line = { + ("#" ~ "include" ~ pp_tokens ~ NEWLINE) | + ("#" ~ "define" ~ identifier ~ replacement_list ~ NEWLINE) | + ("#" ~ "define" ~ identifier_lparen ~ identifier_list? ~ ")" ~ replacement_list ~ NEWLINE) | + ("#" ~ "define" ~ identifier_lparen ~ "..." ~ ")" ~ replacement_list ~ NEWLINE) | + ("#" ~ "define" ~ identifier_lparen ~ identifier_list ~ "," ~ "..." ~ ")" ~ replacement_list ~ NEWLINE) | + ("#" ~ "undef" ~ identifier ~ NEWLINE) | + ("#" ~ "line" ~ pp_tokens ~ NEWLINE) | + ("#" ~ "error" ~ pp_tokens? ~ NEWLINE) | + ("#" ~ "pragma" ~ pp_tokens? ~ NEWLINE) | + ("#" ~ NEWLINE) +} +text_line = { + pp_tokens? ~ NEWLINE +} +non_directive = { + pp_tokens ~ NEWLINE +} +identifier_lparen = ${ + identifier ~ "(" +} +identifier_list = { + identifier ~ ("," ~ identifier)* +} +replacement_list = { + pp_tokens? +} +pp_tokens = { + preprocessing_token+ +} + +WHITESPACE = _{ " " | "\n" | "\t" } +COMMENT = _{ ("//" ~ (!"\n" ~ ANY)*) | ("/*" ~ (!"*/") ~ ANY)* ~ "*/"} diff --git a/src/lib.rs b/src/lib.rs new file mode 100644 index 0000000..9a71f92 --- /dev/null +++ b/src/lib.rs @@ -0,0 +1,14 @@ +use pest::Parser; +use pest_derive::Parser; + +#[derive(Parser)] +#[grammar = "cpp.pest"] +pub struct CPPParser; + +#[cfg(test)] +mod tests { + #[test] + fn it_works() { + assert_eq!(2 + 2, 4); + } +} |