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Support (One) Local Element

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Signed-off-by: Will Hawkins <hawkinsw@obs.cr>
This commit is contained in:
Will Hawkins
2026-01-23 23:29:22 -05:00
parent f81f00103e
commit f9ed3e7fbd
2 changed files with 64 additions and 7 deletions
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tree-sitter-p4/grammar.js
+15 -7
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@@ -29,17 +29,23 @@ export default grammar({
// Common - Parsers
parserType: $ => seq(optional($.annotations), $.parser, field('parser_name', $.identifier), optional($.typeParameters), '(', optional($.parameterList), ')'),
parserLocalElements: $ => choice(seq($.parserLocalElements, $.parserLocalElement)),
parserStates: $ => choice($.parserState, seq($.parserStates, $.parserState)),
parserState: $ => seq(optional($.annotations), $.state, $.identifier, '{', optional($.parserStatements), $.parserTransitionStatement, $.semicolon, '}'),
parserLocalElement: $ => choice($.todo),
// Mark with higher precedence so that the local states are preferred when parsing!
// TODO: Test!
parserLocalElements: $ => prec(2, repeat1(seq($.parserLocalElement, $.semicolon))),
parserStates: $ => repeat1($.parserState),
parserState: $ => seq(optional($.annotations), $.state, $.identifier, '{', optional($.parserLocalElements), optional($.parserStatements), $.parserTransitionStatement, $.semicolon, '}'),
parserLocalElement: $ => choice($.variableDeclaration, $.todo),
selectBody: $ => repeat1(seq($.selectCase, $.semicolon)),
selectCase: $ => seq($.keysetExpression, $.colon, $.identifier),
annotations: $ => choice($.annotation, seq($.annotations, $.annotation)),
annotations: $ => repeat1($.annotation),
//annotation: $ => choice(seq('@', "[a-z]+"), seq('@', "[a-z]+", '(', $.annotationBody, ')'), seq('@', "[a-z]+", '[', $.structuredAnnotationBody, ']')),
annotation: $ => choice(seq('@', "[a-z]+"), seq('@', "[a-z]+", '(', /* empty for now*/ ')'), seq('@', "[a-z]+", '[', /* empty for now */ ']')),
annotation: $ => choice(seq('@', "[a-z]+")),// seq('@', "[a-z]+", '(', /* empty for now*/ ')'), seq('@', "[a-z]+", '[', /* empty for now */ ']')),
// Declarations
@@ -47,7 +53,9 @@ export default grammar({
// 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), '{', seq(optional($.parserLocalElements), $.parserStates), '}'),
parserDeclaration: $ => seq($.parserType, optional($.constructorParameters), '{', optional($.parserLocalElements), $.parserStates, '}'),
variableDeclaration: $ => seq(optional($.annotations), $.typeRef, field('variable_name', $.identifier), optional(seq('=', $.expression))),
// Statements