rpt_expr Class Reference

#include <expr.h>

Inheritance diagram for rpt_expr:

Public Types
typedef aegis_shared_ptr < rpt_expr >	pointer
Public Member Functions
virtual	~rpt_expr ()
void	parse_error (const char *fmt) const
void	append (const rpt_expr::pointer &child)
void	prepend (const rpt_expr::pointer &child)
rpt_value::pointer	evaluate (bool undefer, bool dereference) const
size_t	get_nchildren () const
rpt_position::pointer	get_pos () const
void	pos_from_lex ()
void	pos_from (const rpt_expr::pointer &other)
virtual bool	lvalue () const
rpt_expr::pointer	nth_child (size_t n) const
Protected Member Functions
	rpt_expr ()
virtual rpt_value::pointer	evaluate () const =0
Private Member Functions
	rpt_expr (const rpt_expr &)
rpt_expr &	operator= (const rpt_expr &)
Private Attributes
rpt_position::pointer	pos
rpt_expr::pointer *	child
size_t	nchild
size_t	nchild_max

---

Detailed Description

The rpt_expr abstract base class is used to represent a generic expressson node in the report generator.

Definition at line 34 of file expr.h.

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Member Typedef Documentation

typedef aegis_shared_ptr<rpt_expr> rpt_expr::pointer

Definition at line 37 of file expr.h.

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Constructor & Destructor Documentation

virtual rpt_expr::~rpt_expr

(

)

[virtual]

The destructor.

rpt_expr::rpt_expr

(

)

[protected]

The default constructor.

rpt_expr::rpt_expr

(

const rpt_expr &

)

[private]

The copy constructor. Do not use.

---

Member Function Documentation

void rpt_expr::parse_error

(

const char *

fmt

)

const

The parse_error method is used to report parse errors, reported against the location of this expression node.

void rpt_expr::append

(

const rpt_expr::pointer &

child

)

The append method is used to append a sub-mode to the end of the list of child nodes of this expression node.

void rpt_expr::prepend

(

const rpt_expr::pointer &

child

)

The prepend method is used to prepend a sub-mode to the front of the list of child nodes of this expression node.

rpt_value::pointer rpt_expr::evaluate	(	bool	undefer,
		bool	dereference
	)			const

The evaluate method may be used to calculate the value of the expression syntax tree.

Parameters:

	undefer	True if deferred values should be evaluated.
	dereference	True if reference values should be replaced with the referenced value.

size_t rpt_expr::get_nchildren

(

)

const [inline]

The get_nchildren method is used to obtain the number of child nodes associated with this node.

Definition at line 85 of file expr.h.

rpt_position::pointer rpt_expr::get_pos

(

)

const [inline]

The get_pos method is used to obtain the source file location associated with this node.

Definition at line 91 of file expr.h.

void rpt_expr::pos_from_lex

(

)

The pos_from_lex method is used to set the exproession node's source code position from the lexer's current position.

void rpt_expr::pos_from

(

const rpt_expr::pointer &

other

)

The pos_from method is used to set the exproession node's source code position from the source code location of another expression node.

virtual rpt_value::pointer rpt_expr::evaluate

(

)

const [protected, pure virtual]

The evaluate method may be used to calculate the value of the expression syntax tree.

Implemented in rpt_expr_assign, rpt_expr_assign_power, rpt_expr_assign_mul, rpt_expr_assign_div, rpt_expr_assign_mod, rpt_expr_assign_plus, rpt_expr_assign_minus, rpt_expr_assign_join, rpt_expr_assign_and_bit, rpt_expr_assign_xor_bit, rpt_expr_assign_or_bit, rpt_expr_assign_shift_left, rpt_expr_assign_shift_right, rpt_expr_not_bit, rpt_expr_xor_bit, rpt_expr_or_bit, rpt_expr_and_bit, rpt_expr_comma, rpt_expr_constant, rpt_expr_func, rpt_expr_in, rpt_expr_inc_pre, rpt_expr_inc_post, rpt_expr_dec_pre, rpt_expr_dec_post, rpt_expr_list, rpt_expr_and_logical, rpt_expr_or_logical, rpt_expr_not_logical, rpt_expr_if, rpt_expr_lookup, rpt_expr_mul, rpt_expr_div, rpt_expr_mod, rpt_expr_neg, rpt_expr_pos, rpt_expr_plus, rpt_expr_minus, rpt_expr_join, rpt_expr_power, rpt_expr_lt, rpt_expr_gt, rpt_expr_le, rpt_expr_ge, rpt_expr_eq, rpt_expr_ne, rpt_expr_match, rpt_expr_nmatch, rpt_expr_shift_left, rpt_expr_shift_right, rpt_expr_struct, and rpt_expr_struct_assign.

virtual bool rpt_expr::lvalue

(

)

const [virtual]

The lvalue method may be used to determine whether or not this expression node is an L-value (something which may appear on the left hand side of an assigment, a variable).

The default implementation, which is true for the vast majority of expression nodes, returns false.

Reimplemented in rpt_expr_constant, and rpt_expr_lookup.

rpt_expr::pointer rpt_expr::nth_child

(

size_t

n

)

const

The nth_child method may be used to obtain the specified child node of this node.

Parameters:

n

The index of the child desired, zero based.

Returns:

pointer to child, or NULL if index out of range

rpt_expr& rpt_expr::operator=

(

const rpt_expr &

)

[private]

The assignment operator. Do not use.

---

Field Documentation

rpt_position::pointer rpt_expr::pos [private]

The pos instance variable is used to remember the location of this expression in the source code.

Definition at line 140 of file expr.h.

rpt_expr::pointer* rpt_expr::child [private]

The child instance variable is used to remember the base address of a dynamically allocated array of pointer to child expression nodes.

Definition at line 147 of file expr.h.

size_t rpt_expr::nchild [private]

The nchild instance variable is used to remember the number of elements used to date in the "child" array.

Definition at line 153 of file expr.h.

size_t rpt_expr::nchild_max [private]

The nchild_max instance variable is used to remember the allocated size of the "child" array.

Definition at line 159 of file expr.h.

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The documentation for this class was generated from the following file:

• libaegis/aer/expr.h