literal

<code>literal</code> tests whether a supplied string literally equals a desired value.

Construct parser combinator functions, higher order functions that
parse input. Construction of such parsers is transparent and easy. Their main
application is the parsing of structured text files like those generated by
laboratory instruments. Based on a paper by Hutton (1992)
<doi:10.1017/S0956796800000411>.

Douwe Molenaar

parcr

Construct Parsers for Structured Text Files

literal function

<dl><dt>string</dt>
<dd>string, a single-element character vector, or an object that
can be coerced to a character vector.</dd></dl>

Arguments

<pre><code>
literal(a)(x): satisfy(F(y): y==a)(x)
</code></pre>where <code>F</code> is equivalent to the <code>function</code> declarator in R. So, we have an
anonymous function in the argument of <code>satisfy</code>.

Pseudocode

Matching parser input with a literal string — literal

<dl>

<dt>string</dt>
<dd>string, a single-element character vector, or an object that
can be coerced to a character vector.</dd>

</dl>

<pre><code>
literal(a)(x): satisfy(F(y): y==a)(x)
</code></pre>

where <code>F</code> is equivalent to the <code>function</code> declarator in R. So, we have an
anonymous function in the argument of <code>satisfy</code>.

literal: Matching parser input with a literal string

Description

Usage

Value

Arguments

Pseudocode

Examples