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805 lines
18 KiB
805 lines
18 KiB
const PREC = {
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ASSIGNMENT: -1,
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CONDITIONAL: -2,
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DEFAULT: 0,
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LOGICAL_OR: 1,
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LOGICAL_AND: 2,
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INCLUSIVE_OR: 3,
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EXCLUSIVE_OR: 4,
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BITWISE_AND: 5,
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EQUAL: 6,
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RELATIONAL: 7,
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SIZEOF: 8,
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SHIFT: 9,
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ADD: 10,
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MULTIPLY: 11,
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CAST: 12,
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UNARY: 13,
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CALL: 14,
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FIELD: 15,
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SUBSCRIPT: 16
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};
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module.exports = grammar({
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name: 'c',
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extras: $ => [
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/\s/,
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$.comment,
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],
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inline: $ => [
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$._statement,
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$._top_level_item,
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$._compound_statement_item,
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$._type_identifier,
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$._field_identifier,
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$._statement_identifier,
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],
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conflicts: $ => [
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[$._type_specifier, $._declarator],
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[$._type_specifier, $._declarator, $.macro_type_specifier],
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[$._type_specifier, $._expression],
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[$._type_specifier, $._expression, $.macro_type_specifier],
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[$._type_specifier, $.macro_type_specifier],
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[$.sized_type_specifier],
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],
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rules: {
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translation_unit: $ => repeat($._top_level_item),
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_top_level_item: $ => choice(
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$.function_definition,
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$.linkage_specification,
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$.declaration,
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$.type_definition,
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$._empty_declaration,
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$.preproc_if,
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$.preproc_ifdef,
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$.preproc_include,
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$.preproc_def,
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$.preproc_function_def,
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$.preproc_call
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),
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_compound_statement_item: $ => choice(
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$._statement,
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$.declaration,
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$.type_definition,
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$._empty_declaration,
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alias($.preproc_if_in_compound_statement, $.preproc_if),
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alias($.preproc_ifdef_in_compound_statement, $.preproc_ifdef),
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$.preproc_include,
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$.preproc_def,
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$.preproc_function_def,
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$.preproc_call
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),
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// Preprocesser
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preproc_include: $ => seq(
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preprocessor('include'),
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choice($.string_literal, $.system_lib_string)
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),
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preproc_def: $ => seq(
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preprocessor('define'),
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$.identifier,
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optional(seq(/[ \t]+/, $.preproc_arg)),
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'\n'
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),
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preproc_function_def: $ => seq(
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preprocessor('define'),
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$.identifier,
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$.preproc_params,
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optional($.preproc_arg),
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'\n'
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),
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preproc_params: $ => seq(
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'(', commaSep(choice($.identifier, '...')), ')'
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),
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preproc_call: $ => seq(
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$.preproc_directive,
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optional(seq(/[ \t]+/, $.preproc_arg)),
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'\n'
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),
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preproc_if: $ => seq(
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preprocessor('if'),
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$.preproc_arg,
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repeat($._top_level_item),
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optional(choice($.preproc_else, $.preproc_elif)),
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preprocessor('endif')
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),
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preproc_if_in_compound_statement: $ => seq(
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preprocessor('if'),
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$.preproc_arg,
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repeat($._compound_statement_item),
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optional(choice(
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alias($.preproc_else_in_compound_statement, $.preproc_else),
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alias($.preproc_elif_in_compound_statement, $.preproc_elif)
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)),
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preprocessor('endif')
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),
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preproc_ifdef: $ => seq(
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choice(preprocessor('ifdef'), preprocessor('ifndef')),
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$.identifier,
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repeat($._top_level_item),
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optional(choice($.preproc_else, $.preproc_elif)),
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preprocessor('endif')
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),
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preproc_ifdef_in_compound_statement: $ => seq(
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choice(preprocessor('ifdef'), preprocessor('ifndef')),
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$.identifier,
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repeat($._compound_statement_item),
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optional(choice(
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alias($.preproc_else_in_compound_statement, $.preproc_else),
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alias($.preproc_elif_in_compound_statement, $.preproc_elif)
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)),
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preprocessor('endif')
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),
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preproc_elif: $ => seq(
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preprocessor('elif'),
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$.preproc_arg,
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repeat($._top_level_item),
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optional(choice($.preproc_elif, $.preproc_else))
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),
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preproc_elif_in_compound_statement: $ => seq(
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preprocessor('elif'),
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$.preproc_arg,
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repeat($._compound_statement_item),
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optional(choice(
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alias($.preproc_elif_in_compound_statement, $.preproc_elif),
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alias($.preproc_else_in_compound_statement, $.preproc_else)
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))
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),
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preproc_else: $ => seq(
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preprocessor('else'),
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repeat($._top_level_item)
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),
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preproc_else_in_compound_statement: $ => seq(
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preprocessor('else'),
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repeat($._compound_statement_item)
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),
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preproc_directive: $ => /#[ \t]*[a-zA-Z]\w*/,
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preproc_arg: $ => token(prec(-1, repeat1(choice(/./, '\\\n')))),
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// Main Grammar
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function_definition: $ => seq(
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$._declaration_specifiers,
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$._declarator,
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$.compound_statement
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),
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declaration: $ => seq(
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$._declaration_specifiers,
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commaSep1(choice(
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$._declarator,
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$.init_declarator
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)),
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';'
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),
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type_definition: $ => seq(
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'typedef',
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repeat($.type_qualifier),
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$._type_specifier,
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$._type_declarator,
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';'
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),
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_declaration_specifiers: $ => seq(
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repeat(choice(
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$.storage_class_specifier,
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$.type_qualifier
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)),
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$._type_specifier,
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repeat(choice(
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$.storage_class_specifier,
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$.type_qualifier
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))
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),
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linkage_specification: $ => seq(
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'extern',
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$.string_literal,
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choice(
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$.function_definition,
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$.declaration,
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$.declaration_list
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)
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),
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declaration_list: $ => seq(
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'{',
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repeat($._top_level_item),
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'}'
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),
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_declarator: $ => choice(
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$.pointer_declarator,
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$.function_declarator,
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$.array_declarator,
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seq('(', $._declarator, ')'),
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$.identifier
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),
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_field_declarator: $ => choice(
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alias($.pointer_field_declarator, $.pointer_declarator),
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alias($.function_field_declarator, $.function_declarator),
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alias($.array_field_declarator, $.array_declarator),
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seq('(', $._field_declarator, ')'),
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$._field_identifier
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),
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_type_declarator: $ => choice(
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alias($.pointer_type_declarator, $.pointer_declarator),
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alias($.function_type_declarator, $.function_declarator),
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alias($.array_type_declarator, $.array_declarator),
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seq('(', $._type_declarator, ')'),
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$._type_identifier
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),
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_abstract_declarator: $ => choice(
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$.abstract_pointer_declarator,
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$.abstract_function_declarator,
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$.abstract_array_declarator,
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prec(1, seq('(', $._abstract_declarator, ')'))
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),
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pointer_declarator: $ => prec.right(seq('*', $._declarator)),
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pointer_field_declarator: $ => prec.right(seq('*', $._field_declarator)),
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pointer_type_declarator: $ => prec.right(seq('*', $._type_declarator)),
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abstract_pointer_declarator: $ => prec.right(seq('*', optional($._abstract_declarator))),
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function_declarator: $ => prec(1, seq($._declarator, $.parameter_list)),
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function_field_declarator: $ => prec(1, seq($._field_declarator, $.parameter_list)),
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function_type_declarator: $ => prec(1, seq($._type_declarator, $.parameter_list)),
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abstract_function_declarator: $ => prec(1, seq(optional($._abstract_declarator), $.parameter_list)),
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array_declarator: $ => prec(1, seq(
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$._declarator,
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'[',
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optional($._declaration_specifiers),
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optional($._expression),
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']'
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)),
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array_field_declarator: $ => prec(1, seq(
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$._field_declarator,
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'[',
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optional($._declaration_specifiers),
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optional($._expression),
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']'
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)),
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array_type_declarator: $ => prec(1, seq(
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$._type_declarator,
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'[',
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optional($._declaration_specifiers),
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optional($._expression),
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']'
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)),
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abstract_array_declarator: $ => prec(1, seq(
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optional($._abstract_declarator),
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'[',
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optional($._declaration_specifiers),
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optional($._expression),
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']'
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)),
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init_declarator: $ => seq(
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$._declarator,
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'=',
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choice($.initializer_list, $._expression)
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),
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compound_statement: $ => seq(
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'{',
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repeat($._compound_statement_item),
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'}'
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),
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storage_class_specifier: $ => choice(
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'extern',
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'static' ,
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'auto',
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'register',
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'inline'
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),
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type_qualifier: $ => choice(
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'const',
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'restrict',
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'volatile',
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'restrict',
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'_Atomic'
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),
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_type_specifier: $ => choice(
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$.struct_specifier,
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$.union_specifier,
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$.enum_specifier,
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$.macro_type_specifier,
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$.sized_type_specifier,
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$.primitive_type,
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$._type_identifier
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),
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sized_type_specifier: $ => seq(
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repeat1(choice(
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'unsigned',
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'long',
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'short'
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)),
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optional(choice(
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prec.dynamic(-1, $._type_identifier),
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$.primitive_type
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))
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),
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primitive_type: $ => token(choice(
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'bool',
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'char',
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'int',
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'float',
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'double',
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'void',
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'size_t',
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'ssize_t',
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'intptr_t',
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'uintptr_t',
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'charptr_t',
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...[8, 16, 32, 64].map(n => `int${n}_t`),
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...[8, 16, 32, 64].map(n => `uint${n}_t`),
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...[8, 16, 32, 64].map(n => `char${n}_t`)
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)),
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enum_specifier: $ => seq(
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'enum',
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choice(
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seq(
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$._type_identifier,
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optional($.enumerator_list)
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),
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$.enumerator_list
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)
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),
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enumerator_list: $ => seq(
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'{',
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commaSep($.enumerator),
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optional(','),
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'}'
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),
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struct_specifier: $ => seq(
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'struct',
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choice(
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seq(
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$._type_identifier,
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optional($.field_declaration_list)
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),
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$.field_declaration_list
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)
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),
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union_specifier: $ => seq(
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'union',
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choice(
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seq(
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$._type_identifier,
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optional($.field_declaration_list)
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),
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$.field_declaration_list
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)
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),
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field_declaration_list: $ => seq(
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'{',
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repeat($.field_declaration),
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'}'
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),
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field_declaration: $ => seq(
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$._declaration_specifiers,
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commaSep($._field_declarator),
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optional(seq(':', $._expression)),
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';'
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),
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enumerator: $ => seq(
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$.identifier,
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optional(seq('=', $._expression))
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),
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parameter_list: $ => prec.dynamic(1, seq(
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'(',
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commaSep(choice($.parameter_declaration, '...')),
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')'
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)),
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parameter_declaration: $ => seq(
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$._declaration_specifiers,
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optional(choice($._declarator, $._abstract_declarator))
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),
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// Statements
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_statement: $ => choice(
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$.labeled_statement,
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$.compound_statement,
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$.expression_statement,
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$.if_statement,
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$.switch_statement,
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$.case_statement,
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$.do_statement,
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$.while_statement,
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$.for_statement,
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$.return_statement,
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$.break_statement,
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$.continue_statement,
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$.goto_statement
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),
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labeled_statement: $ => seq(
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$._statement_identifier,
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':',
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$._statement
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),
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expression_statement: $ => seq(
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optional(choice(
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$._expression,
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$.comma_expression
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)),
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';'
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),
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if_statement: $ => prec.right(seq(
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'if',
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'(', $._expression, ')',
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$._statement,
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optional(seq(
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'else',
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$._statement
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))
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)),
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switch_statement: $ => seq(
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'switch',
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'(', $._expression, ')',
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$._statement
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),
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case_statement: $ => seq(
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choice(
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seq('case', $._expression),
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'default'
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),
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':',
|
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choice(
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$._statement,
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$.declaration,
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$.type_definition
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)
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),
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while_statement: $ => seq(
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'while',
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'(', $._expression, ')',
|
|
$._statement
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),
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do_statement: $ => seq(
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'do',
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$._statement,
|
|
'while',
|
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'(', $._expression, ')'
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|
),
|
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for_statement: $ => seq(
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'for',
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'(',
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choice(
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$.declaration,
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seq(optional($._expression), ';')
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),
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optional($._expression), ';',
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commaSep($._expression),
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')',
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$._statement
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),
|
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|
return_statement: $ => seq(
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'return',
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optional($._expression),
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';'
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),
|
|
|
|
break_statement: $ => seq(
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'break', ';'
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),
|
|
|
|
continue_statement: $ => seq(
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'continue', ';'
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),
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|
goto_statement: $ => seq(
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'goto',
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|
$._statement_identifier,
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';'
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),
|
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|
|
// Expressions
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|
|
_expression: $ => choice(
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$.conditional_expression,
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|
$.assignment_expression,
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|
$.logical_expression,
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|
$.bitwise_expression,
|
|
$.equality_expression,
|
|
$.relational_expression,
|
|
$.shift_expression,
|
|
$.math_expression,
|
|
$.cast_expression,
|
|
$.pointer_expression,
|
|
$.sizeof_expression,
|
|
$.subscript_expression,
|
|
$.call_expression,
|
|
$.field_expression,
|
|
$.compound_literal_expression,
|
|
$.identifier,
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|
$.number_literal,
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|
$.string_literal,
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|
$.true,
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|
$.false,
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|
$.null,
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|
$.concatenated_string,
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|
$.char_literal,
|
|
$.parenthesized_expression
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|
),
|
|
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|
comma_expression: $ => seq(
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|
$._expression,
|
|
',',
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choice($._expression, $.comma_expression)
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),
|
|
|
|
conditional_expression: $ => prec.right(PREC.CONDITIONAL, seq(
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$._expression,
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|
'?',
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|
$._expression,
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|
':',
|
|
$._expression
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)),
|
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|
assignment_expression: $ => prec.right(PREC.ASSIGNMENT, seq(
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$._expression,
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choice(
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'=',
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'*=',
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|
'/=',
|
|
'%=',
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|
'+=',
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|
'-=',
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|
'<<=',
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|
'>>=',
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|
'&=',
|
|
'^=',
|
|
'|='
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|
),
|
|
$._expression
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|
)),
|
|
|
|
pointer_expression: $ => choice(
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prec.left(PREC.UNARY, seq('*', $._expression)),
|
|
prec.left(PREC.UNARY, seq('&', $._expression))
|
|
),
|
|
|
|
logical_expression: $ => choice(
|
|
prec.left(PREC.LOGICAL_OR, seq($._expression, '||', $._expression)),
|
|
prec.left(PREC.LOGICAL_AND, seq($._expression, '&&', $._expression)),
|
|
prec.left(PREC.UNARY, seq('!', $._expression))
|
|
),
|
|
|
|
bitwise_expression: $ => choice(
|
|
prec.left(PREC.INCLUSIVE_OR, seq($._expression, '|', $._expression)),
|
|
prec.left(PREC.EXCLUSIVE_OR, seq($._expression, '^', $._expression)),
|
|
prec.left(PREC.BITWISE_AND, seq($._expression, '&', $._expression)),
|
|
prec.left(PREC.UNARY, seq('~', $._expression))
|
|
),
|
|
|
|
equality_expression: $ => prec.left(PREC.EQUAL, seq(
|
|
$._expression, choice('==', '!='), $._expression
|
|
)),
|
|
|
|
relational_expression: $ => prec.left(PREC.RELATIONAL, seq(
|
|
$._expression, choice('<', '>', '<=', '>='), $._expression
|
|
)),
|
|
|
|
shift_expression: $ => prec.left(PREC.SHIFT, seq(
|
|
$._expression, choice('<<', '>>'), $._expression)
|
|
),
|
|
|
|
math_expression: $ => choice(
|
|
prec.left(PREC.ADD, seq($._expression, '+', $._expression)),
|
|
prec.left(PREC.ADD, seq($._expression, '-', $._expression)),
|
|
prec.left(PREC.MULTIPLY, seq($._expression, '*', $._expression)),
|
|
prec.left(PREC.MULTIPLY, seq($._expression, '/', $._expression)),
|
|
prec.left(PREC.MULTIPLY, seq($._expression, '%', $._expression)),
|
|
prec.right(PREC.UNARY, seq('-', $._expression)),
|
|
prec.right(PREC.UNARY, seq('+', $._expression)),
|
|
prec.right(PREC.UNARY, seq(choice('--', '++'), $._expression)),
|
|
prec.right(PREC.UNARY, seq($._expression, choice('++', '--')))
|
|
),
|
|
|
|
cast_expression: $ => prec(PREC.CAST, seq(
|
|
'(',
|
|
$.type_descriptor,
|
|
')',
|
|
$._expression
|
|
)),
|
|
|
|
type_descriptor: $ => seq(
|
|
repeat($.type_qualifier),
|
|
$._type_specifier,
|
|
optional($._abstract_declarator)
|
|
),
|
|
|
|
sizeof_expression: $ => prec(PREC.SIZEOF, seq(
|
|
'sizeof',
|
|
choice(
|
|
$._expression,
|
|
seq('(', $.type_descriptor, ')')
|
|
)
|
|
)),
|
|
|
|
subscript_expression: $ => prec(PREC.SUBSCRIPT, seq(
|
|
$._expression, '[', $._expression, ']')
|
|
),
|
|
|
|
call_expression: $ => prec(PREC.CALL, seq($._expression, $.argument_list)),
|
|
|
|
argument_list: $ => prec.dynamic(1, seq('(', commaSep($._expression), ')')),
|
|
|
|
field_expression: $ => seq(
|
|
prec(PREC.FIELD, seq(
|
|
$._expression,
|
|
choice('.', '->')
|
|
)),
|
|
$._field_identifier
|
|
),
|
|
|
|
compound_literal_expression: $ => seq(
|
|
'(',
|
|
$.type_descriptor,
|
|
')',
|
|
$.initializer_list
|
|
),
|
|
|
|
parenthesized_expression: $ => seq(
|
|
'(',
|
|
choice($._expression, $.comma_expression),
|
|
')'
|
|
),
|
|
|
|
initializer_list: $ => seq(
|
|
'{',
|
|
commaSep(choice(
|
|
$.initializer_pair,
|
|
$._expression,
|
|
$.initializer_list
|
|
)),
|
|
optional(','),
|
|
'}'
|
|
),
|
|
|
|
initializer_pair: $ => seq(
|
|
repeat1(choice($.subscript_designator, $.field_designator)),
|
|
'=',
|
|
choice($._expression, $.initializer_list)
|
|
),
|
|
|
|
subscript_designator: $ => seq('[', $._expression, ']'),
|
|
|
|
field_designator: $ => seq('.', $._field_identifier),
|
|
|
|
number_literal: $ => token(seq(
|
|
choice(
|
|
/\d+(\.\d+)?/,
|
|
/\d+u/,
|
|
seq('0x', /[0-9a-fA-f]+/),
|
|
seq('0b', /[01]+/)
|
|
),
|
|
repeat(choice('u', 'l', 'U', 'L'))
|
|
)),
|
|
|
|
char_literal: $ => token(seq(
|
|
'\'',
|
|
choice(
|
|
seq(optional('\\'), /[^']/),
|
|
seq('\\', '\'')
|
|
),
|
|
'\''
|
|
)),
|
|
|
|
concatenated_string: $ => seq(
|
|
$.string_literal,
|
|
repeat1($.string_literal)
|
|
),
|
|
|
|
string_literal: $ => token(seq(
|
|
'"',
|
|
repeat(choice(/[^\\"\n]/, /\\./)),
|
|
'"')
|
|
),
|
|
|
|
system_lib_string: $ => token(seq(
|
|
'<',
|
|
repeat(choice(/[^>\n]/, '\\>')),
|
|
'>'
|
|
)),
|
|
|
|
true: $ => token(choice('TRUE', 'true')),
|
|
false: $ => token(choice('FALSE', 'false')),
|
|
null: $ => 'NULL',
|
|
|
|
identifier: $ => /[a-zA-Z_]\w*/,
|
|
|
|
_type_identifier: $ => alias($.identifier, $.type_identifier),
|
|
_field_identifier: $ => alias($.identifier, $.field_identifier),
|
|
_statement_identifier: $ => alias($.identifier, $.statement_identifier),
|
|
|
|
_empty_declaration: $ => seq(
|
|
$._declaration_specifiers,
|
|
';'
|
|
),
|
|
|
|
macro_type_specifier: $ => seq(
|
|
$.identifier,
|
|
'(',
|
|
$.type_descriptor,
|
|
')'
|
|
),
|
|
|
|
// http://stackoverflow.com/questions/13014947/regex-to-match-a-c-style-multiline-comment/36328890#36328890
|
|
comment: $ => token(choice(
|
|
seq('//', /.*/),
|
|
seq(
|
|
'/*',
|
|
/[^*]*\*+([^/*][^*]*\*+)*/,
|
|
'/'
|
|
)
|
|
)),
|
|
}
|
|
});
|
|
|
|
module.exports.PREC = PREC
|
|
|
|
function preprocessor (command) {
|
|
return alias(new RegExp('#[ \t]*' + command), '#' + command)
|
|
}
|
|
|
|
function commaSep (rule) {
|
|
return optional(commaSep1(rule))
|
|
}
|
|
|
|
function commaSep1 (rule) {
|
|
return seq(rule, repeat(seq(',', rule)))
|
|
}
|
|
|
|
function commaSepTrailing (recurSymbol, rule) {
|
|
return choice(rule, seq(recurSymbol, ',', rule))
|
|
}
|