R.utils (version 2.6.0)

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\#[<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

# NOT RUN {
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")
# }