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<ol class="chapter"><li class="chapter-item expanded "><a href="specification/index.html"><strong aria-hidden="true">1.</strong> Specification</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="specification/tokens/index.html"><strong aria-hidden="true">1.1.</strong> Tokens</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="specification/tokens/token-format.html"><strong aria-hidden="true">1.1.1.</strong> Token format</a></li><li class="chapter-item expanded "><a href="specification/tokens/token-kinds.html"><strong aria-hidden="true">1.1.2.</strong> Token Kinds</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="specification/tokens/kinds/operators.html"><strong aria-hidden="true">1.1.2.1.</strong> Operators</a></li><li class="chapter-item expanded "><a href="specification/tokens/kinds/keywords.html"><strong aria-hidden="true">1.1.2.2.</strong> Keywords</a></li><li class="chapter-item expanded "><a href="specification/tokens/kinds/identifiers.html"><strong aria-hidden="true">1.1.2.3.</strong> Identifiers</a></li><li class="chapter-item expanded "><a href="specification/tokens/kinds/literals.html"><strong aria-hidden="true">1.1.2.4.</strong> Literals</a></li><li class="chapter-item expanded "><a href="specification/tokens/kinds/brackets.html"><strong aria-hidden="true">1.1.2.5.</strong> Brackets</a></li></ol></li></ol></li><li class="chapter-item expanded "><a href="specification/parser/index.html"><strong aria-hidden="true">1.2.</strong> Parser</a></li><li class="chapter-item expanded "><a href="examples/index.html"><strong aria-hidden="true">1.3.</strong> Examples</a></li></ol></li></ol>
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<h1 id="specification"><a class="header" href="#specification">Specification</a></h1>
<div style="break-before: page; page-break-before: always;"></div><h1 id="tokens"><a class="header" href="#tokens">Tokens</a></h1>
<p>This chapter describes the tokens specification. All of the tokens in the design are described in this section.</p>
<div style="break-before: page; page-break-before: always;"></div><h1 id="token-format"><a class="header" href="#token-format">Token format</a></h1>
<p><a href="https://github.com/SymboScript/SymboScript/blob/main/types/src/lexer.rs#L4-L15">Token</a></p>
<pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span>pub struct Token {
/// Token Type
pub kind: TokenKind,
/// Start offset in source
pub start: usize,
/// End offset in source
pub end: usize,
pub value: TokenValue,
}
<span class="boring">}</span></code></pre></pre>
<p><a href="https://github.com/SymboScript/SymboScript/blob/main/types/src/lexer.rs#L110-L114">TokenValue</a></p>
<pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span>pub enum TokenValue {
None,
Number(f64),
String(String),
}
<span class="boring">}</span></code></pre></pre>
<div style="break-before: page; page-break-before: always;"></div><h1 id="token-kinds"><a class="header" href="#token-kinds">Token Kinds</a></h1>
<p>This chapter describes the token kinds used in the spec.</p>
<p><a href="https://github.com/SymboScript/SymboScript/blob/main/types/src/lexer.rs#L18-L107">Kinds</a></p>
<pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span>pub enum TokenKind {
Eof, // end of file
Comment,
Unexpected,
Semicolon,
Comma,
Colon,
Dot,
// Operators
Plus,
Minus,
Star,
Slash,
Power,
Range,
Modulo,
// Bitwise operators (Keyword2Operator)
BitAnd,
BitOr,
BitNot,
BitXor,
BitLeftShift,
BitRightShift,
// Unary operators
PlusPlus,
MinusMinus,
Question,
// Logic operators (Keyword2Operator)
And,
Or,
Xor,
Not,
/// Assignments operators (+=, -=, *=, /=...)
Assign,
FormulaAssign,
PlusAssign,
MinusAssign,
MultiplyAssign,
DivideAssign,
PowerAssign,
ModuloAssign,
// Comparison operators
Equal,
NotEqual,
Less,
LessEqual,
Greater,
GreaterEqual,
// Brackets
LParen,
RParen,
LBrace,
RBrace,
LBracket,
RBracket,
// Identifiers
Identifier,
// Literals
Number,
Str,
// --- Keywords ---
// Keyword literals
True,
False,
// Keywords
If,
Else,
While,
For,
Loop,
Let,
Return,
Break,
Continue,
Function,
In,
}
<span class="boring">}</span></code></pre></pre>
<div style="break-before: page; page-break-before: always;"></div><h1 id="operators"><a class="header" href="#operators">Operators</a></h1>
<div style="break-before: page; page-break-before: always;"></div><h1 id="keywords"><a class="header" href="#keywords">Keywords</a></h1>
<div style="break-before: page; page-break-before: always;"></div><h1 id="identifiers"><a class="header" href="#identifiers">Identifiers</a></h1>
<div style="break-before: page; page-break-before: always;"></div><h1 id="literals"><a class="header" href="#literals">Literals</a></h1>
<p>In SymboScript exists only three kinds of token literals: strings, numbers, booleans.</p>
<h2 id="strings"><a class="header" href="#strings">Strings</a></h2>
<p>Strings are enclosed in double quotes, single quotes or backticks.</p>
<pre><code class="language-symboscript">&quot;hello&quot;
&quot;hello&quot;
`hello`
&quot;hello\nworld&quot;
'hello&quot;world'
&quot;hello ' world&quot;
</code></pre>
<h2 id="numbers"><a class="header" href="#numbers">Numbers</a></h2>
<pre><code class="language-symboscript">1 .1
1.1
1e1
1E1
1.1e1
1.1E1
</code></pre>
<h2 id="booleans"><a class="header" href="#booleans">Booleans</a></h2>
<pre><code class="language-symboscript">true
false
</code></pre>
<div style="break-before: page; page-break-before: always;"></div><h1 id="brackets"><a class="header" href="#brackets">Brackets</a></h1>
<div style="break-before: page; page-break-before: always;"></div><h1 id="parser"><a class="header" href="#parser">Parser</a></h1>
<h2 id="expressionss"><a class="header" href="#expressionss">Expressionss</a></h2>
<h3 id="operator-priority"><a class="header" href="#operator-priority">Operator priority</a></h3>
<div class="table-wrapper"><table><thead><tr><th>Operator/Expression</th><th>Associativity</th><th>Parser fn name</th><th>Impl</th></tr></thead><tbody>
<tr><td>Calls, Identifiers, Literals</td><td>Left to Right</td><td>call</td><td></td></tr>
<tr><td>Members</td><td>Left to Right</td><td>dot</td><td></td></tr>
<tr><td>new</td><td>Right to Left</td><td>new_expr</td><td></td></tr>
<tr><td>delete</td><td>Right to Left</td><td>delete_expr</td><td></td></tr>
<tr><td>await</td><td>Right to Left</td><td>await_expr</td><td></td></tr>
<tr><td><code>!</code> <code>++</code> <code>--</code> <code>()</code> <code>~</code> (unary <code>-</code> <code>+</code>) <code>[]</code> <code>{}</code></td><td>Left to Right</td><td>factor</td><td></td></tr>
<tr><td><code>^</code></td><td>Left to Left</td><td>power</td><td></td></tr>
<tr><td><code>*</code> <code>/</code> <code>%</code></td><td>Left to Right</td><td>term</td><td></td></tr>
<tr><td><code>+</code> <code>-</code></td><td>Left to Right</td><td>add_sub</td><td></td></tr>
<tr><td><code>&gt;&gt;</code> <code>&lt;&lt;</code></td><td>Left to Right</td><td>shift</td><td></td></tr>
<tr><td><code>&amp;</code></td><td>Left to Right</td><td>bit_and</td><td></td></tr>
<tr><td><code>bxor</code></td><td>Left to Right</td><td>bit_xor</td><td></td></tr>
<tr><td><code>|</code></td><td>Left to Right</td><td>bit_or</td><td></td></tr>
<tr><td><code>==</code> <code>!=</code> <code>&lt;</code> <code>&lt;=</code> <code>&gt;</code> <code>&gt;=</code></td><td>Left to Right</td><td>cmp</td><td></td></tr>
<tr><td><code>&amp;&amp;</code></td><td>Left to Right</td><td>logical_and</td><td></td></tr>
<tr><td><code>||</code></td><td>Left to Right</td><td>logical_or</td><td></td></tr>
<tr><td><code>..</code></td><td>Left to Right</td><td>range</td><td></td></tr>
<tr><td><code>?:</code></td><td>Right to Left</td><td>ternary</td><td></td></tr>
<tr><td><code>=</code> <code>:=</code> <code>+=</code> <code>-=</code> <code>*=</code> <code>/=</code> <code>^=</code> <code>%=</code></td><td>Right to Left</td><td>assign</td><td></td></tr>
<tr><td><code>,</code></td><td>None</td><td>comma</td><td></td></tr>
</tbody></table>
</div>
<h3 id="statements"><a class="header" href="#statements">Statements</a></h3>
<div class="table-wrapper"><table><thead><tr><th>Statement</th><th>Parser fn name</th><th>Trigger token</th><th>Impl</th></tr></thead><tbody>
<tr><td>Variable declaration</td><td>var_decl</td><td>Let</td><td></td></tr>
<tr><td>Async function declaration</td><td>fn_decl</td><td>Async</td><td></td></tr>
<tr><td>Function declaration</td><td>fn_decl</td><td>Function</td><td></td></tr>
<tr><td>Return statement</td><td>return_stmt</td><td>Return</td><td></td></tr>
<tr><td>Yield statement</td><td>yield_stmt</td><td>Yield</td><td></td></tr>
<tr><td>Break statement</td><td>break_stmt</td><td>Break</td><td></td></tr>
<tr><td>Continue statement</td><td>continue_stmt</td><td>Continue</td><td></td></tr>
<tr><td>If statement</td><td>if_stmt</td><td>If</td><td></td></tr>
<tr><td>While statement</td><td>while_stmt</td><td>While</td><td></td></tr>
<tr><td>For statement</td><td>for_stmt</td><td>For</td><td></td></tr>
<tr><td>Loop statement</td><td>loop_stmt</td><td>Loop</td><td></td></tr>
<tr><td>Try statement</td><td>try_stmt</td><td>Try</td><td></td></tr>
<tr><td>Throw statement</td><td>throw_stmt</td><td>Throw</td><td></td></tr>
<tr><td>Expression statement</td><td>expr_stmt</td><td>Other</td><td></td></tr>
</tbody></table>
</div><div style="break-before: page; page-break-before: always;"></div><h1 id="examples"><a class="header" href="#examples">Examples</a></h1>
<p>This is chapter about how the code in SymboScript looks.</p>
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