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| author | Marshall Lochbaum <mwlochbaum@gmail.com> | 2020-07-18 18:26:52 -0400 |
|---|---|---|
| committer | Marshall Lochbaum <mwlochbaum@gmail.com> | 2020-07-18 18:29:59 -0400 |
| commit | 229e2cd2f5c78b13c483a8559dead2c8f31d8e42 (patch) | |
| tree | 9d6a1ff0100bda7632948987352b3d6614c3eeb5 /docs/spec/literal.html | |
| parent | 010b97c8cf346dfeafc289ae66f77e8c61cd9865 (diff) | |
Terminology changes: subject, 1/2-modifier, Box/Unbox to Enclose/Merge, blocks
Diffstat (limited to 'docs/spec/literal.html')
| -rw-r--r-- | docs/spec/literal.html | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/docs/spec/literal.html b/docs/spec/literal.html index c4914753..2d03bc68 100644 --- a/docs/spec/literal.html +++ b/docs/spec/literal.html @@ -1,5 +1,5 @@ <head><link href="../style.css" rel="stylesheet"/></head> -<p>A <em>literal</em> is a single <a href="token.html">token</a> that indicates a fixed character, number, or array. While literals indicate data of a value type, <a href="primitive.html">primitives</a> indicate data of a function type: function, modifier, or composition.</p> +<p>A <em>literal</em> is a single <a href="token.html">token</a> that indicates a fixed character, number, or array. While literals indicate values of a data type, <a href="primitive.html">primitives</a> indicate values of an operation type: function, 1-modifier, or 2-modifier.</p> <p>Two types of literal deal with text. As the source code is considered to be a sequence of unicode code points ("characters"), and these code points are also used for BQN's character <a href="types.html">data type</a>, the representation of a text literal is very similar to its value. In a text literal, the newline character is always represented using the ASCII line feed character, code point 10. A <em>character literal</em> is enclosed with single quotes <code>'</code> and its value is identical to the single character between them. A <em>string literal</em> is enclosed in double quotes <code>"</code>, and any double quotes between them must come in pairs, as a lone double quote marks the end of the literal. The value of a string literal is a rank-1 array whose elements are the characters in between the enclosing quotes, after replacing each pair of double quotes with only one such quote.</p> <p>The format of a <em>numeric literal</em> is more complicated. From the <a href="token.html">tokenization rules</a>, a numeric literal consists of a numeric character (one of <code><span class='Number'>¯∞π.0123456789</span></code>) followed by any number of numeric or alphabetic characters. Some numeric literals are <em>valid</em> and indicate a number, while others are invalid and cause an error. The grammar for valid numbers is given below in a <a href="https://en.wikipedia.org/wiki/Backus%E2%80%93Naur_form">BNF</a> variant. Only four alphabetic characters are allowed: "i", which separates the real and imaginary components of a complex number, "e", which functions as in scientific notation, and the uppercase versions of these letters.</p> <pre><span class='Value'>number</span> <span class='Function'>=</span> <span class='Value'>component</span> <span class='Paren'>(</span> <span class='Paren'>(</span> <span class='String'>"i"</span> <span class='Function'>|</span> <span class='String'>"I"</span> <span class='Paren'>)</span> <span class='Value'>component</span> <span class='Paren'>)</span><span class='Value'>?</span> |