Inheritance diagram for P4::ValidateParsedProgram:

Public Member Functions
void	postorder (const IR::Annotations *annotations) override
	Structured annotations cannot reuse names.

void	postorder (const IR::Constant *c) override
	Check that the type of a constant is either bit<>, int<> or int.

void	postorder (const IR::ConstructorCallExpression *expression) override
	Cannot invoke constructors in actions.

void	postorder (const IR::Declaration_Constant *decl) override
	Constant names cannot be underscore.

void	postorder (const IR::Declaration_Instance *inst) override

void	postorder (const IR::Declaration_Variable *decl) override
	Variable names cannot be underscore.

void	postorder (const IR::Dots *dots) override

void	postorder (const IR::EntriesList *l) override

void	postorder (const IR::ExitStatement *statement) override
	Exit statements are not allowed in parsers or functions.

void	postorder (const IR::Method *t) override

void	postorder (const IR::P4Control *control) override

void	postorder (const IR::P4Parser *parser) override

void	postorder (const IR::P4Program *program) override

void	postorder (const IR::P4Table *t) override
	Tables must have an 'actions' property.

void	postorder (const IR::ParserState *s) override
	The accept and reject states cannot be implemented.

void	postorder (const IR::ReturnStatement *statement) override
	Return statements are not allowed in parsers.

void	postorder (const IR::StructField *f) override
	Struct field names cannot be underscore.

void	postorder (const IR::SwitchStatement *statement) override
	Default label in switch statement is always the last one.

void	postorder (const IR::Type_Bits *type) override
	Width of a bit<> or int<> type is greater than 0.

void	postorder (const IR::Type_Package *package) override

void	postorder (const IR::Type_Varbits *type) override

Detailed Description

This pass performs some simple semantic checks on the program; since the grammar accepts many programs that are actually illegal, this pass does some additional validation.

This pass is run immediately after parsing. There is no type information at this point, so it only does simple checks.

integer constants have valid types
don't care _ is not used as a name for methods, fields, variables, instances
width of bit<> types is positive
width of int<> types is larger than 1
no parser state is named 'accept' or 'reject'
constructor parameters are direction-less
tables have an actions property
instantiations appear at the top-level only
the default label of a switch statement appears last
instantiations do not occur in actions
constructors are not invoked in actions
returns and exits do not appear in parsers
exits do not appear in functions
extern constructors have the same name as the enclosing extern
names of all parameters are distinct
no duplicate declarations in toplevel program
Dots are the last field

Member Function Documentation

◆ postorder() [1/2]

void P4::ValidateParsedProgram::postorder ( const IR::Declaration_Instance * decl )

override

Instance names cannot be don't care Do not declare instances in apply {} blocks, parser states or actions

◆ postorder() [2/2]

void P4::ValidateParsedProgram::postorder ( const IR::Method * m )

override

Check that underscore is not a method name Check that constructors do not have a return type Check that extern constructor names match the enclosing extern

Public Member Functions

Detailed Description

Member Function Documentation

◆ postorder() [1/2]

◆ postorder() [2/2]