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Refine parserStatement grammar #1415

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Refine parserStatement grammar #1415

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8 changes: 6 additions & 2 deletions p4-16/spec/P4-16-spec.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -6029,11 +6029,15 @@ The syntax for parser statements is given by the following grammar rules:

[source,bison]
----
include::grammar.adoc[tag=parserStatements]

include::grammar.adoc[tag=parserStatement]

include::grammar.adoc[tag=parserStatementOrDeclaration]

include::grammar.adoc[tag=parserStatOrDeclList]

include::grammar.adoc[tag=parserBlockStatement]

include::grammar.adoc[tag=parserConditionalStatement]
----

Architectures may place restrictions on the expressions and statements
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31 changes: 22 additions & 9 deletions p4-16/spec/grammar.adoc
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Expand Up @@ -323,35 +323,48 @@ parserStates
// tag::parserState[]
parserState
: optAnnotations STATE name
"{" parserStatements transitionStatement "}"
"{" parserStatOrDeclList transitionStatement "}"
;
// end::parserState[]

// tag::parserStatements[]
parserStatements
// tag::parserStatementOrDeclaration[]
parserStatementOrDeclaration
: variableDeclaration
| constantDeclaration
| parserStatement
;
// end::parserStatementOrDeclaration[]

// tag::parserStatOrDeclList[]
parserStatOrDeclList
: /* empty */
| parserStatements parserStatement
| parserStatOrDeclList parserStatementOrDeclaration
;
// end::parserStatements[]
// end::parserStatOrDeclList[]

// tag::parserStatement[]
parserStatement
: assignmentOrMethodCallStatement
| directApplication
| emptyStatement
| variableDeclaration
| constantDeclaration
| parserBlockStatement
| conditionalStatement
| parserConditionalStatement
;
// end::parserStatement[]

// tag::parserBlockStatement[]
parserBlockStatement
: optAnnotations "{" parserStatements "}"
: optAnnotations "{" parserStatOrDeclList "}"
;
// end::parserBlockStatement[]

// tag::parserConditionalStatement[]
parserConditionalStatement
: IF "(" expression ")" parserStatement
| IF "(" expression ")" parserStatement ELSE parserStatement
;
// end::parserConditionalStatement[]

// tag::transitionStatement[]
transitionStatement
: /* empty */
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