prod Struct Reference

Base class for AST nodes. More...

#include <prod.hh>

Inheritance diagram for prod:

Collaboration diagram for prod:

Public Member Functions
	prod (prod *parent)
virtual void	indent (std::ostream &out)
	Newline and indent according to tree level.
virtual void	out (std::ostream &out)=0
	Emit SQL for this production.
virtual void	match ()
	Check with the impedance matching code whether this production has been blacklisted and throw an exception.
virtual void	accept (prod_visitor *v)
	Visitor pattern for walking the AST. More...
virtual void	fail (const char *reason)
	Report a "failed to generate" error.
void	retry ()
	Increase the retry count and throw an exception when retry_limit is exceeded.

Public Attributes
struct prod *	pprod
	Parent production that instanciated this one. More...
struct scope *	scope
	Scope object to model column/table reference visibility.
int	level
	Level of this production in the AST. 0 for root node.
long	retries = 0
	Number of retries in this production. More...
long	retry_limit = 100
	Maximum number of retries allowed before reporting a failure to the Parent prod.

Detailed Description

Base class for AST nodes.

Definition at line 17 of file prod.hh.

Member Function Documentation

accept()

virtual void prod::accept ( prod_visitor *  v )

inlinevirtual

Visitor pattern for walking the AST.

Make sure you visit all child production when deriving classes.

Reimplemented in common_table_expression, update_returning, merge_stmt, when_clause_insert, when_clause_update, when_clause, update_stmt, upsert_stmt, set_list, insert_stmt, delete_returning, delete_stmt, prepare_stmt, query_spec, select_list, from_clause, joined_table, expr_join_cond, table_subquery, window_function, bool_binop, exists_predicate, null_predicate, coalesce, funcall, and case_expr.

Definition at line 41 of file prod.hh.

Referenced by funcall::accept(), coalesce::accept(), window_function::accept(), from_clause::accept(), select_list::accept(), insert_stmt::accept(), set_list::accept(), and merge_stmt::accept().

Member Data Documentation

pprod

struct prod* prod::pprod

Parent production that instanciated this one.

May be NULL for top-level productions.

Definition at line 20 of file prod.hh.

retries

long prod::retries = 0

Number of retries in this production.

Child productions are generated speculatively and may fail.

Definition at line 27 of file prod.hh.

---

The documentation for this struct was generated from the following files:

• prod.hh
• prod.cc