The Hash-If-Control component interface

Collaboration diagram for The Hash-If-Control component interface:

Modules
	Macro-generated code
Files
file	if_control.c
file	if_control.h
Enumerations
enum	if_state_t {   IF_STATE_OUTSIDE, IF_STATE_FALSE_PREFIX, IF_STATE_TRUE_PREFIX, IF_STATE_PASS_MIDDLE,   IF_STATE_FALSE_MIDDLE, IF_STATE_TRUE_MIDDLE, IF_STATE_PASS_ELSE, IF_STATE_FALSE_ELSE,   IF_STATE_TRUE_ELSE, IF_STATE_FALSE_TRAILER, IF_STATE_COUNT }
Functions
void	transition (line_type_t linetype)
bool	dead_line (void)
bool	was_unconditional_line (void)
bool	is_unconditional_line (void)
size_t	if_start_line (void)
size_t	if_depth (void)
if_state_t	if_state (void)
void	if_control_toplevel (void)

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Enumeration Type Documentation

enum if_state_t

Enumeration of the if-control states

Enumerator:

IF_STATE_OUTSIDE	We are outside any hash-if
IF_STATE_FALSE_PREFIX	We have a false hash-if followed by false hash-elif
IF_STATE_TRUE_PREFIX	The first non-false hash-(el)if is true
IF_STATE_PASS_MIDDLE	The first non-false hash-(el)if is unknown
IF_STATE_FALSE_MIDDLE	We have a false hash-elif after a pass state
IF_STATE_TRUE_MIDDLE	We have a true hash-elif after a pass state
IF_STATE_PASS_ELSE	We have an hash-else after a pass state
IF_STATE_FALSE_ELSE	We have an hash-else after a true state
IF_STATE_TRUE_ELSE	We have an hash-else after only false states
IF_STATE_FALSE_TRAILER	All hash-elif directives after a true are false
IF_STATE_COUNT	Count of if-control states

Definition at line 57 of file if_control.h.

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Function Documentation

bool dead_line

(

void

)

Is the current line rejected?

Definition at line 408 of file if_control.c.

References GET_STATE, if_depth(), IF_STATE_FALSE_ELSE, IF_STATE_FALSE_MIDDLE, IF_STATE_FALSE_PREFIX, and IF_STATE_FALSE_TRAILER.

Referenced by dropping_line().

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void if_control_toplevel

(

void

)

Reset the depth of if-nesting to 0

Definition at line 456 of file if_control.c.

References SET_STATE.

Referenced by exit_diagnostics(), and node_proc().

size_t if_depth

(

void

)

Return the current depth of if-nesting

Definition at line 444 of file if_control.c.

References GET_STATE.

Referenced by dead_line(), debug(), if_start_line(), if_state(), is_unconditional_line(), set_state(), transition(), vreport(), and was_unconditional_line().

size_t if_start_line

(

void

)

For debug(), return the starting line number of the current hash-if-sequence.

Definition at line 450 of file if_control.c.

References GET_STATE, and if_depth().

Referenced by vreport().

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if_state_t if_state

(

void

)

Return the current if-state

Definition at line 438 of file if_control.c.

References GET_STATE, and if_depth().

Referenced by if_state_name().

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bool is_unconditional_line

(

void

)

Is the current line outside any hash-if-scope or in the scope of a satisfied hash-if-condition.

Definition at line 427 of file if_control.c.

References GET_STATE, if_depth(), IF_STATE_OUTSIDE, IF_STATE_TRUE_ELSE, IF_STATE_TRUE_MIDDLE, and IF_STATE_TRUE_PREFIX.

Referenced by eligible_line(), eval_line(), insert_pending_contradiction(), symbol_define(), and symbol_undefine().

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void transition

(

line_type_t

linetype

)

Transition the if-control state given an evaluated line type.

Parameters:

linetype

The linetype of the last evaluated input line.

The function advances a state-machine whose parameters are the current input linetype and the current if-control state. The transition performs the appropriate action to despatch the line just evaluated and sets a new if-state.

Definition at line 401 of file if_control.c.

References GET_STATE, if_depth(), and transition_table.

Referenced by eval_line(), and node_proc().

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bool was_unconditional_line

(

void

)

Is the current line outside any hash-if-scope?

Definition at line 419 of file if_control.c.

References GET_STATE, if_depth(), and IF_STATE_OUTSIDE.

Referenced by eval_line().

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