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Support Parameters For Parsers

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Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
This commit is contained in:
Will Hawkins
2026-03-30 07:57:41 -04:00
parent 744c375c5f
commit 8962235aca
8 changed files with 317 additions and 26 deletions
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tree-sitter-p4/grammar.js
+6 -6
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@@ -29,17 +29,17 @@ export default grammar({
// Common - Parameters
typeParameters: $ => seq('<', $.typeParameterList, '>'),
typeParameterList: $ => choice("[a-z]+", seq($.typeParameterList, ',', "[a-z]+")),
parameterList: $ => choice($.parameter, seq($.parameterList, ',', $.parameter)),
parameter_list: $ => choice($.parameter, seq($.parameter_list, ',', $.parameter)),
parameter: $ => choice(seq(optional($.annotations), optional($.direction), $.typeRef, $.identifier), seq(optional($.annotations), optional($.direction), $.typeRef, $.identifier, '=', $.expression)),
direction: $ => choice($.in, $.out, $.inout),
// Common - Types
typeRef: $ => choice($.baseType, $.type_identifier),
baseType: $ => choice($.bool, $.error, $.string, $.int, $.bit /* omitting "templated" types" */),
constructorParameters: $ => seq('(', optional($.parameterList), ')'),
constructor_parameters: $ => seq('(', optional($.parameter_list), ')'),
// Common - Parsers
parserType: $ => seq(optional($.annotations), $.parser, field('parser_name', $.identifier), optional($.typeParameters), '(', optional($.parameterList), ')'),
parserType: $ => seq(optional($.annotations), $.parser, field('parser_name', $.identifier), optional($.typeParameters), '(', optional($.parameter_list), ')'),
// Mark with higher precedence so that the local states are preferred when parsing!
// TODO: Test!
@@ -60,7 +60,7 @@ export default grammar({
// Instantiation
instantiation: $ => seq($.typeRef, '(', optional($.parameterList), ')', $.identifier),
instantiation: $ => seq($.typeRef, '(', optional($.parameter_list), ')', $.identifier),
// Declarations
declaration: $ => seq(choice($.parserDeclaration, $.parserTypeDeclaration, $.type_declaration)),
@@ -70,8 +70,8 @@ export default grammar({
struct_declaration_fields: $=> repeat1(seq($.variableDeclaration)),
// Make separate productions for the parser type and the parser type declaration because the latter can have type parameters.
parserTypeDeclaration: $ => seq(optional($.annotations), $.parser, field('parser_name', $.identifier), optional($.typeParameters), '(', optional($.parameterList), ')'),
parserDeclaration: $ => seq($.parserType, optional($.constructorParameters), '{', optional($.parserLocalElements), $.parserStates, '}'),
parserTypeDeclaration: $ => seq(optional($.annotations), $.parser, field('parser_name', $.identifier), optional($.typeParameters), '(', optional($.parameter_list), ')'),
parserDeclaration: $ => seq($.parserType, '{', optional($.parserLocalElements), $.parserStates, '}'),
variableDeclaration: $ => seq(optional($.annotations), $.typeRef, field('variable_name', $.identifier), optional(seq($.assignment, $.expression)), $._semicolon),