Refactor Parser For Parameter Lists

Signed-off-by: Will Hawkins <hawkinsw@obs.cr>

tree-sitter-p4/grammar.js

@@ -32,6 +32,7 @@ export default grammar({
         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),
+        parameters: $=> seq('(', optional($.parameter_list), ')'),
 
         // Common - Types
         typeRef: $ => choice($.baseType, $.type_identifier),
@@ -39,7 +40,7 @@ export default grammar({
         constructor_parameters: $ => seq('(', optional($.parameter_list), ')'),
 
         // Common - Parsers
-        parserType: $ => seq(optional($.annotations), $.parser, field('parser_name', $.identifier), optional($.typeParameters), '(', optional($.parameter_list), ')'),
+        parserType: $ => seq(optional($.annotations), $.parser, field('parser_name', $.identifier), optional($.typeParameters), $.parameters),
 
         // Mark with higher precedence so that the local states are preferred when parsing!
         // TODO: Test!
@@ -70,7 +71,7 @@ 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($.parameter_list), ')'),
+        parserTypeDeclaration: $ => seq(optional($.annotations), $.parser, field('parser_name', $.identifier), optional($.typeParameters), $.parameters),
         parserDeclaration: $ => seq($.parserType, '{', optional($.parserLocalElements), $.parserStates, '}'),
 
         variableDeclaration: $ => seq(optional($.annotations), $.typeRef, field('variable_name', $.identifier), optional(seq($.assignment, $.expression)), $._semicolon),

tree-sitter-p4/test/corpus/annotations.txt

@@ -20,6 +20,7 @@ Simple Annotated Declaration
     )
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -66,6 +67,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState

tree-sitter-p4/test/corpus/declarations.txt

@@ -15,6 +15,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -61,6 +62,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -107,6 +109,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -153,6 +156,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -205,6 +209,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState

tree-sitter-p4/test/corpus/expressions.txt

@@ -16,6 +16,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -84,6 +85,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -147,6 +149,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -205,6 +208,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -258,6 +262,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState

tree-sitter-p4/test/corpus/parsers.txt

@@ -14,6 +14,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -48,6 +49,7 @@ parser imple(bool pname) {
    (parserType
     (parser)
     (identifier)
+    (parameters
      (parameter_list
       (parameter
        (typeRef
@@ -59,6 +61,7 @@ parser imple(bool pname) {
       )
      )
     )
+   )
    (parserStates
     (parserState
      (state)

tree-sitter-p4/test/corpus/statements.txt

@@ -16,6 +16,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -69,6 +70,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -125,6 +127,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -195,6 +198,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -288,6 +292,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState

tree-sitter-p4/test/corpus/transitions.txt

@@ -14,6 +14,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -49,6 +50,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState
@@ -106,6 +108,7 @@ parser simple() {
    (parserType
     (parser)
     (identifier)
+    (parameters)
    )
    (parserStates
     (parserState