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comparison website/src/manual.html @ 1353:8d95711f6615
replace java() with require "java"
| author | Franklin Schmidt <fschmidt@gmail.com> |
|---|---|
| date | Wed, 20 Mar 2019 17:03:29 -0600 |
| parents | 60599adc27b8 |
| children | 372906d1d08b |
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| 1352:1604d7f36f3a | 1353:8d95711f6615 |
|---|---|
| 227 | 227 |
| 228 | 228 |
| 229 <h3 heading><a name="env" href="#env">Environments</a></h3> | 229 <h3 heading><a name="env" href="#env">Environments</a></h3> |
| 230 | 230 |
| 231 <p> | 231 <p> |
| 232 The environment of a chunk starts with only two local variables: <code><a href="#require">require</a></code> and <code><a href="#java">java</a></code>. These are functions are used to load and access libraries and other modules. All other variables must be added to the environment using <a href="http://localhost:8080/manual.html#local_stmt">local declarations</a>. | 232 The environment of a chunk starts with only one local variable: <code><a href="#require">require</a></code>. This function is used to load and access libraries and other modules. All other variables must be added to the environment using <a href="http://localhost:8080/manual.html#local_stmt">local declarations</a>. |
| 233 | 233 |
| 234 <p> | 234 <p> |
| 235 As will be discussed in <a href="#vars">Variables</a> and <a href=#assignment">Assignment</a>, | 235 As will be discussed in <a href="#vars">Variables</a> and <a href=#assignment">Assignment</a>, |
| 236 any reference to a free name | 236 any reference to a free name |
| 237 (that is, a name not bound to any declaration) <code>var</code> | 237 (that is, a name not bound to any declaration) <code>var</code> |
| 1759 | 1759 |
| 1760 | 1760 |
| 1761 <h3 heading><a name="default_lib" href="#default_lib">Default Environment</a></h3> | 1761 <h3 heading><a name="default_lib" href="#default_lib">Default Environment</a></h3> |
| 1762 | 1762 |
| 1763 <p> | 1763 <p> |
| 1764 These are provided by default as local variables for any Luan code as described in <a href="#env">Environments</a>. | 1764 This is provided by default as a local variable for any Luan code as described in <a href="#env">Environments</a>. |
| 1765 | |
| 1766 | |
| 1767 <h4 heading><a name="java" href="#java"><code>java ()</code></a></h4> | |
| 1768 | |
| 1769 <p> | |
| 1770 This function enables Java in the current chunk if that chunk has permission to use Java. If the chunk doesn't have permission to use Java, then an error is thrown. | |
| 1771 | 1765 |
| 1772 | 1766 |
| 1773 <h4 heading><a name="require" href="#require"><code>require (mod_uri)</code></a></h4> | 1767 <h4 heading><a name="require" href="#require"><code>require (mod_uri)</code></a></h4> |
| 1774 | 1768 |
| 1775 <p> | 1769 <p> |
| 1785 <pre> | 1779 <pre> |
| 1786 local function require(mod_name) | 1780 local function require(mod_name) |
| 1787 return <a href="#Package.load">Package.load</a>(mod_name) or <a href="#Luan.error">Luan.error</a>("module '"..mod_name.."' not found") | 1781 return <a href="#Package.load">Package.load</a>(mod_name) or <a href="#Luan.error">Luan.error</a>("module '"..mod_name.."' not found") |
| 1788 end | 1782 end |
| 1789 </pre> | 1783 </pre> |
| 1784 | |
| 1785 <p> | |
| 1786 A special case is: | |
| 1787 | |
| 1788 <pre> | |
| 1789 require "java" | |
| 1790 </pre> | |
| 1791 | |
| 1792 <p> | |
| 1793 This enables Java in the current chunk if that chunk has permission to use Java. If the chunk doesn't have permission to use Java, then an error is thrown. | |
| 1790 | 1794 |
| 1791 | 1795 |
| 1792 <h3 heading><a name="luan_lib" href="#luan_lib">Basic Functions</a></h3> | 1796 <h3 heading><a name="luan_lib" href="#luan_lib">Basic Functions</a></h3> |
| 1793 | 1797 |
| 1794 <p> | 1798 <p> |