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397 lines
18 KiB
HTML
397 lines
18 KiB
HTML
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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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<main>
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<h1 id="specification"><a class="header" href="#specification">Specification</a></h1>
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<div style="break-before: page; page-break-before: always;"></div><h1 id="tokens"><a class="header" href="#tokens">Tokens</a></h1>
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<p>This chapter describes the tokens specification. All of the tokens in the design are described in this section.</p>
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<div style="break-before: page; page-break-before: always;"></div><h1 id="token-format"><a class="header" href="#token-format">Token format</a></h1>
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<p><a href="https://github.com/SymboScript/SymboScript/blob/main/types/src/lexer.rs#L4-L15">Token</a></p>
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<pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span>pub struct Token {
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/// Token Type
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pub kind: TokenKind,
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/// Start offset in source
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pub start: usize,
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/// End offset in source
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pub end: usize,
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pub value: TokenValue,
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}
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<span class="boring">}</span></code></pre></pre>
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<p><a href="https://github.com/SymboScript/SymboScript/blob/main/types/src/lexer.rs#L110-L114">TokenValue</a></p>
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<pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span>pub enum TokenValue {
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None,
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Number(f64),
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String(String),
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}
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<span class="boring">}</span></code></pre></pre>
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<div style="break-before: page; page-break-before: always;"></div><h1 id="token-kinds"><a class="header" href="#token-kinds">Token Kinds</a></h1>
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<p>This chapter describes the token kinds used in the spec.</p>
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<p><a href="https://github.com/SymboScript/SymboScript/blob/main/types/src/lexer.rs#L18-L107">Kinds</a></p>
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<pre><pre class="playground"><code class="language-rust"><span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span>pub enum TokenKind {
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Eof, // end of file
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Comment,
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Unexpected,
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Semicolon,
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Comma,
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Colon,
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Dot,
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// Operators
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Plus,
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Minus,
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Star,
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Slash,
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Power,
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Range,
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Modulo,
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// Bitwise operators (Keyword2Operator)
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BitAnd,
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BitOr,
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BitNot,
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BitXor,
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BitLeftShift,
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BitRightShift,
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// Unary operators
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PlusPlus,
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MinusMinus,
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Question,
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// Logic operators (Keyword2Operator)
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And,
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Or,
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Xor,
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Not,
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/// Assignments operators (+=, -=, *=, /=...)
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Assign,
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FormulaAssign,
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PlusAssign,
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MinusAssign,
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MultiplyAssign,
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DivideAssign,
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PowerAssign,
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ModuloAssign,
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// Comparison operators
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Equal,
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NotEqual,
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Less,
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LessEqual,
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Greater,
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GreaterEqual,
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// Brackets
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LParen,
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RParen,
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LBrace,
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RBrace,
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LBracket,
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RBracket,
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// Identifiers
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Identifier,
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// Literals
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Number,
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Str,
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// --- Keywords ---
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// Keyword literals
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True,
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False,
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// Keywords
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If,
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Else,
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While,
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For,
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Loop,
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Let,
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Return,
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Break,
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Continue,
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Function,
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In,
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}
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<span class="boring">}</span></code></pre></pre>
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<div style="break-before: page; page-break-before: always;"></div><h1 id="operators"><a class="header" href="#operators">Operators</a></h1>
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<div style="break-before: page; page-break-before: always;"></div><h1 id="keywords"><a class="header" href="#keywords">Keywords</a></h1>
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<div style="break-before: page; page-break-before: always;"></div><h1 id="identifiers"><a class="header" href="#identifiers">Identifiers</a></h1>
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<div style="break-before: page; page-break-before: always;"></div><h1 id="literals"><a class="header" href="#literals">Literals</a></h1>
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<p>In SymboScript exists only three kinds of token literals: strings, numbers, booleans.</p>
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<h2 id="strings"><a class="header" href="#strings">Strings</a></h2>
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<p>Strings are enclosed in double quotes, single quotes or backticks.</p>
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<pre><code class="language-symboscript">"hello"
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"hello"
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`hello`
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"hello\nworld"
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'hello"world'
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"hello ' world"
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</code></pre>
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<h2 id="numbers"><a class="header" href="#numbers">Numbers</a></h2>
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<pre><code class="language-symboscript">1 .1
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1.1
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1e1
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1E1
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1.1e1
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1.1E1
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</code></pre>
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<h2 id="booleans"><a class="header" href="#booleans">Booleans</a></h2>
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<pre><code class="language-symboscript">true
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false
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</code></pre>
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<div style="break-before: page; page-break-before: always;"></div><h1 id="brackets"><a class="header" href="#brackets">Brackets</a></h1>
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<div style="break-before: page; page-break-before: always;"></div><h1 id="parser"><a class="header" href="#parser">Parser</a></h1>
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<h2 id="expressionss"><a class="header" href="#expressionss">Expressionss</a></h2>
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<h3 id="operator-priority"><a class="header" href="#operator-priority">Operator priority</a></h3>
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<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>
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<tr><td>Method calls</td><td>Left to Right</td><td>call</td><td>❌</td></tr>
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<tr><td>Function calls</td><td>Left to Right</td><td>call</td><td>❌</td></tr>
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<tr><td><code>!</code> <code>++</code> <code>--</code> <code>()</code> <code>~</code></td><td>Left to Right</td><td>factor</td><td>✅</td></tr>
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<tr><td><code>^</code></td><td>Left to Left</td><td>power</td><td>✅</td></tr>
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<tr><td><code>*</code> <code>/</code> <code>%</code></td><td>Left to Right</td><td>term</td><td>✅</td></tr>
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<tr><td><code>+</code> <code>-</code></td><td>Left to Right</td><td>add_sub</td><td>✅</td></tr>
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<tr><td><code>>></code> <code><<</code></td><td>Left to Right</td><td>shift</td><td>✅</td></tr>
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<tr><td><code>&</code></td><td>Left to Right</td><td>bit_and</td><td>✅</td></tr>
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<tr><td><code>bxor</code></td><td>Left to Right</td><td>bit_xor</td><td>✅</td></tr>
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<tr><td><code>|</code></td><td>Left to Right</td><td>bit_or</td><td>✅</td></tr>
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<tr><td><code>==</code> <code>!=</code> <code><</code> <code><=</code> <code>></code> <code>>=</code></td><td>Left to Right</td><td>cmp</td><td>✅</td></tr>
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<tr><td><code>&&</code></td><td>Left to Right</td><td>logical_and</td><td>✅</td></tr>
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<tr><td><code>||</code></td><td>Left to Right</td><td>logical_or</td><td>✅</td></tr>
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<tr><td><code>..</code></td><td>Left to Right</td><td>range</td><td>✅</td></tr>
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<tr><td><code>?:</code></td><td>Left to Right</td><td>ternary</td><td>✅</td></tr>
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<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>
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<tr><td><code>,</code></td><td>Left to Right</td><td>comma</td><td>✅</td></tr>
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</tbody></table>
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</div><div style="break-before: page; page-break-before: always;"></div><h1 id="examples"><a class="header" href="#examples">Examples</a></h1>
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<p>This is chapter about how the code in SymboScript looks.</p>
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