R.utils (version 2.12.3)

VComments: The VComments class

Description

Package: R.utils
Class VComments

Object
~~|
~~+--SmartComments
~~~~~~~|
~~~~~~~+--VComments

Directly known subclasses:
LComments

public static class VComments
extends SmartComments

The VComments class.

Usage

VComments(letter="V", verboseName="verbose", ...)

Arguments

letter

The smart letter.

verboseName

The name of the verbose object.

...

Not used.

Fields and Methods

Methods:

	convertComment	-
	reset	-
	validate	-

Methods inherited from SmartComments:
compile, convertComment, parse, reset, validate

Methods inherited from Object:
$, $<-, [[, [[<-, as.character, attach, attachLocally, clearCache, clearLookupCache, clone, detach, equals, extend, finalize, getEnvironment, getFieldModifier, getFieldModifiers, getFields, getInstantiationTime, getStaticInstance, hasField, hashCode, ll, load, names, objectSize, print, save

Author

Henrik Bengtsson

Details

The 'v' in VComments stands for 'verbose', because of its relationship to the Verbose class.

Here is a list of VComments and the R code that replaces each of them by the compiler:

Constructors

#V0#

[<args>] - NullVerbose(<args>)

#V1#

[<args>] - Verbose(<args>)

Controls

#V=#

[<variable>] - Sets the name of the <verbose> object. Default is 'verbose'.

#V^#

<threshold> - setThreshold(<verbose>, <threshold>)

#V?#

<expression> - if (isVisible(<verbose>)) { <expression> }

#V@#

<level> - setDefaultLevel(<verbose>, <level>)

#Vm#

<method> <args> - <method>(<verbose>, <args>)

Enters and exits

#V+#

[<message>] - enter(<verbose>, <message>)

#V-#

[<message>] - exit(<verbose>, <message>)

#V!#

[<message>] - pushState(<verbose>)
on.exit(popState(<verbose>))
If <message>, enter(<verbose>, <message>)

Simple output

#Vn#

<ignored> - newline(<verbose>)

#Vr#

<ignored> - ruler(<verbose>)

#Vt#

<ignored> - timestamp(<verbose>)

#Vw#

[<title>] - warnings(<verbose>, <title>)

Output messages

#Vc#

[<message>] - cat(<verbose>, <message>)

#Ve#

<expression> - eval(<verbose>, <expression>)

#Vh#

<message> - header(<verbose>, <message>)

#Vp#

<object> - print(<verbose>, <object>)

#Vs#

<object> - summary(<verbose>, <object>)

#Vz#

<object> - str(<verbose>, <object>)

Examples

filename <- system.file("data-ex/exampleVComments.R", package="R.utils")
lines <- readLines(filename)

cat("Code before preprocessing:\n")
displayCode(code=lines, pager="console")

lines <- VComments$compile(lines)

cat("Code after preprocessing:\n")
displayCode(code=lines, pager="console")