WikiSysop at 16:05, 16 April 2018

2018-04-16T16:05:42Z

← Older revision		Revision as of 12:05, 16 April 2018
Line 1:		Line 1:
	<h1><~~apl~~>⎕SI</~~apl~~> - State Indicator</h1>		<h1><aplxx>⎕SI</aplxx> - State Indicator</h1>

	<apll>⎕SI</apll> is a niladic system function which returns a character matrix of the functions and their line numbers currently being executed. Consider the following functions:		<apll>⎕SI</apll> is a niladic system function which returns a character matrix of the functions and their line numbers currently being executed. Consider the following functions:
Line 55:		Line 55:
	In this example, <apll>⎕SI</apll> is displayed on <apll>test2[2]</apll>, and '''test1''' is called on <apll>test2[3]</apll>. In turn, '''test1''' calls <apll>⎕SI</apll> on <apll>test1[2]</apll> and suspends on <apll>test1[4]</apll>, all of which is reflected in the output of <apll>⎕SI</apll> at each level.		In this example, <apll>⎕SI</apll> is displayed on <apll>test2[2]</apll>, and '''test1''' is called on <apll>test2[3]</apll>. In turn, '''test1''' calls <apll>⎕SI</apll> on <apll>test1[2]</apll> and suspends on <apll>test1[4]</apll>, all of which is reflected in the output of <apll>⎕SI</apll> at each level.

	== Special Rows In <~~apll~~>⎕SI</~~apll~~> ==		== Special Rows In <aplx>⎕SI</aplx> ==

	Note that a row in the result of <apll>⎕SI</apll> might represent Quad input, the Execute function, and/or a Magic Function. These rows are identified by a leading <apll>⎕</apll>, <apll>⍎</apll>, and <apll>#</apll>, respectively. After these rows are removed from <apll>⎕SI</apll>, the remaining rows match up one-to-one with the elements of <apll>⎕LC</apll>.		Note that a row in the result of <apll>⎕SI</apll> might represent Quad input, the Execute function, and/or a Magic Function. These rows are identified by a leading <apll>⎕</apll>, <apll>⍎</apll>, and <apll>#</apll>, respectively. After these rows are removed from <apll>⎕SI</apll>, the remaining rows match up one-to-one with the elements of <apll>⎕LC</apll>.

	{{SFN\|SI}}		{{SFN\|SI}}

WikiSysop: Created page with "

⎕SI - State Indicator

⎕SI is a niladic system function which returns a character matrix of the functions and their line numbers currently..."

2017-06-04T20:03:49Z

Created page with "<h1><apl>⎕SI</apl> - State Indicator</h1> <apll>⎕SI</apll> is a niladic system function which returns a character matrix of the functions and their line numbers currently..."

New page

<h1><apl>⎕SI</apl> - State Indicator</h1>

<apll>⎕SI</apll> is a niladic system function which returns a character matrix of the functions and their line numbers currently being executed. Consider the following functions:

<apll><pre>
∇ test1
[1] 'Inside test1'
[2] 'SI=' ⎕SI
[3]
[4] +
∇

∇ test2
[1] 'Inside test2, calling test1'
[2] 'SI=' ⎕SI
[3] test1
∇
</pre></apll>

Calling '''test1''' produces the following output:

<apll><pre>
test1
Inside test1
SI= test1[2]
SYNTAX ERROR
test1[4] +
∧
⎕SI
test1[4] *
</pre></apll>

In this example, <apll>⎕SI</apll> is displayed on <apll>test1[2]</apll>, after which the function is suspended on <apll>test1[4]</apll> as indicated by the trailing asterisk.

Calling '''test2''' with '''test1''' still suspended produces the following output:

<apll><pre>
test2
Inside test2, calling test1
SI= test2[2]
test1[4] *
Inside test1
SI= test1[2]
test2[3]
test1[4] *
SYNTAX ERROR
test1[4] +
∧
⎕SI
test1[4] *
test2[3]
test1[4] *
</pre></apll>

In this example, <apll>⎕SI</apll> is displayed on <apll>test2[2]</apll>, and '''test1''' is called on <apll>test2[3]</apll>. In turn, '''test1''' calls <apll>⎕SI</apll> on <apll>test1[2]</apll> and suspends on <apll>test1[4]</apll>, all of which is reflected in the output of <apll>⎕SI</apll> at each level.

== Special Rows In <apll>⎕SI</apll> ==

Note that a row in the result of <apll>⎕SI</apll> might represent Quad input, the Execute function, and/or a Magic Function. These rows are identified by a leading <apll>⎕</apll>, <apll>⍎</apll>, and <apll>#</apll>, respectively. After these rows are removed from <apll>⎕SI</apll>, the remaining rows match up one-to-one with the elements of <apll>⎕LC</apll>.

{{SFN|SI}}

System Function SI - Revision history

WikiSysop at 16:05, 16 April 2018

WikiSysop: Created page with "

⎕SI - State Indicator