R.utils (version 2.4.0)

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
Converts a verbose comment to R code.
reset	Resets a VComments compiler.
	validate
Validates the compiled lines.

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

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\#[] - NullVerbose()
• \#V1\#[] - Verbose()

Controls

• \#V=\#[] - Sets the name of the object. Default is 'verbose'.
• \#V\^\# - setThreshold(, )
• \#V?\# - if (isVisible()) { }
• \#V@\# - setDefaultLevel(, )
• \#Vm\# - (, )

Enters and exits

• \#V+\#[] - enter(, )
• \#V-\#[] - exit(, )
• \#V!\#[] - pushState() on.exit(popState()) If , enter(, )

Simple output

• \#Vn\# - newline()
• \#Vr\# - ruler()
• \#Vt\# - timestamp()
• \#Vw\#[

Output messages

• \#Vc\#[] - cat(, )
• \#Ve\# - eval(, )
• \#Vh\# - header(, )
• \#Vp\#
• \#Vs\#
• \#Vz\#

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")

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