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@@ -1307,10 +1326,12 @@ and this project adheres to <a href="https://semver.org/spec/v2.0.0.html">Semant
<ul>
<li>Compiler warnings for the follwing: shadowing, negative spends, division by zero, unused functions, unused includes, unused stateful annotations, unused variables, unused parameters, unused user-defined type, dead return value.</li>
<li>The pipe operator |&gt;
<code>[1, 2, 3] |&gt; List.first |&gt; Option.is_some // Option.is_some(List.first([1, 2, 3]))</code></li>
<div class="highlight"><pre><span></span><code>[1, 2, 3] |&gt; List.first |&gt; Option.is_some // Option.is_some(List.first([1, 2, 3]))
</code></pre></div></li>
<li>Allow binary operators to be used as lambdas
<code>function sum(l : list(int)) : int = foldl((+), 0, l)
function logical_and(x, y) = (&amp;&amp;)(x, y)</code></li>
<div class="highlight"><pre><span></span><code>function sum(l : list(int)) : int = foldl((+), 0, l)
function logical_and(x, y) = (&amp;&amp;)(x, y)
</code></pre></div></li>
</ul>
<h3 id="changed">Changed</h3>
<ul>
@@ -1332,12 +1353,14 @@ and this project adheres to <a href="https://semver.org/spec/v2.0.0.html">Semant
<li>Add builtin types (<code>AENS.name, AENS.pointee, Chain.ttl, Chain.base_tx, Chain.ga_meta_tx, Chain.paying_for_tx</code>) to
the calldata and result decoder</li>
<li>Patterns guards
<code>switch(x)
a::[] | a &gt; 10 =&gt; 1
_ =&gt; 2</code>
<code>function
f(a::[]) | a &gt; 10 = 1
f(_) = 2</code></li>
<div class="highlight"><pre><span></span><code>switch(x)
a::[] | a &gt; 10 =&gt; 1
_ =&gt; 2
</code></pre></div>
<div class="highlight"><pre><span></span><code>function
f(a::[]) | a &gt; 10 = 1
f(_) = 2
</code></pre></div></li>
</ul>
<h3 id="changed_1">Changed</h3>
<ul>
@@ -1381,10 +1404,11 @@ and this project adheres to <a href="https://semver.org/spec/v2.0.0.html">Semant
has been added. Use it by <code>include "String.aes"</code>. It includes functions for
turning strings into lists of characters for detailed manipulation. For
example:
<code>include "String.aes"
contract C =
entrypoint filter_all_a(s: string) : string =
String.from_list(List.filter((c : char) =&gt; c != 'a', String.to_list(s)))</code>
<div class="highlight"><pre><span></span><code>include &quot;String.aes&quot;
contract C =
entrypoint filter_all_a(s: string) : string =
String.from_list(List.filter((c : char) =&gt; c != &#39;a&#39;, String.to_list(s)))
</code></pre></div>
will return a list with all <code>a</code>'s removed.</li>
</ul>
<p>There are also convenience functions <code>split</code>, <code>concat</code>, <code>to_upper</code>,
@@ -1416,13 +1440,14 @@ and this project adheres to <a href="https://semver.org/spec/v2.0.0.html">Semant
transaction and the transaction hash is available <code>Auth.tx</code>, it is only
available during authentication if invoked by a normal contract call
it returns <code>None</code>. Example:
<code>switch(Auth.tx)
None =&gt; abort("Not in Auth context")
Some(tx0) =&gt;
switch(tx0.tx)
Chain.SpendTx(_, amount, _) =&gt; amount &gt; 400
Chain.ContractCallTx(_, _) =&gt; true
_ =&gt; false</code>
<div class="highlight"><pre><span></span><code>switch(Auth.tx)
None =&gt; abort(&quot;Not in Auth context&quot;)
Some(tx0) =&gt;
switch(tx0.tx)
Chain.SpendTx(_, amount, _) =&gt; amount &gt; 400
Chain.ContractCallTx(_, _) =&gt; true
_ =&gt; false
</code></pre></div>
- A debug mode is a added to the compiler. Right now its only use is to
turn off hermetization.</p>
<h3 id="changed_5">Changed</h3>
@@ -1471,18 +1496,21 @@ and this project adheres to <a href="https://semver.org/spec/v2.0.0.html">Semant
<ul>
<li>Allow separate entrypoint/function type signature and definition, and pattern
matching in left-hand sides:
<code>function
length : list('a) =&gt; int
length([]) = 0
length(x :: xs) = 1 + length(xs)</code></li>
<div class="highlight"><pre><span></span><code> function
length : list(&#39;a) =&gt; int
length([]) = 0
length(x :: xs) = 1 + length(xs)
</code></pre></div></li>
<li>Allow pattern matching in list comprehension generators (filtering out match
failures):
<code>function somes(xs : list(option('a))) : list('a) =
[ x | Some(x) &lt;- xs ]</code></li>
<div class="highlight"><pre><span></span><code> function somes(xs : list(option(&#39;a))) : list(&#39;a) =
[ x | Some(x) &lt;- xs ]
</code></pre></div></li>
<li>Allow pattern matching in let-bindings (aborting on match failures):
<code>function test(m : map(int, int)) =
let Some(x) = Map.lookup(m, 0)
x</code></li>
<div class="highlight"><pre><span></span><code> function test(m : map(int, int)) =
let Some(x) = Map.lookup(m, 0)
x
</code></pre></div></li>
</ul>
<h3 id="changed_7">Changed</h3>
<ul>
@@ -1521,8 +1549,9 @@ and this project adheres to <a href="https://semver.org/spec/v2.0.0.html">Semant
and verifying an Ethereum address for a message hash and a signature.</li>
<li>Sophia supports list comprehensions known from languages like Python, Haskell or Erlang.
Example syntax:
<code>[x + y | x &lt;- [1,2,3,4,5], let k = x*x, if (k &gt; 5), y &lt;- [k, k+1, k+2]]
// yields [12,13,14,20,21,22,30,31,32]</code></li>
<div class="highlight"><pre><span></span><code>[x + y | x &lt;- [1,2,3,4,5], let k = x*x, if (k &gt; 5), y &lt;- [k, k+1, k+2]]
// yields [12,13,14,20,21,22,30,31,32]
</code></pre></div></li>
<li>A new contract, and endpoint, modifier <code>payable</code> is introduced. Contracts, and enpoints,
that shall be able to receive funds should be marked as payable. <code>Address.is_payable(a)</code>
can be used to check if an (contract) address is payable or not.</li>
@@ -1560,21 +1589,24 @@ and this project adheres to <a href="https://semver.org/spec/v2.0.0.html">Semant
<h3 id="added_8">Added</h3>
<ul>
<li>New builtin function <code>require : (bool, string) =&gt; ()</code>. Defined as
<code>function require(b, err) = if(!b) abort(err)</code></li>
<div class="highlight"><pre><span></span><code>function require(b, err) = if(!b) abort(err)
</code></pre></div></li>
<li>New builtin functions
<code>Bytes.to_str : bytes(_) =&gt; string
Bytes.to_int : bytes(_) =&gt; int</code>
<div class="highlight"><pre><span></span><code>Bytes.to_str : bytes(_) =&gt; string
Bytes.to_int : bytes(_) =&gt; int
</code></pre></div>
for converting a byte array to a hex string and interpreting it as a
big-endian encoded integer respectively.</li>
</ul>
<h3 id="changed_10">Changed</h3>
<ul>
<li>Public contract functions must now be declared as <em>entrypoints</em>:
<code>contract Example =
// Exported
entrypoint exported_fun(x) = local_fun(x)
// Not exported
function local_fun(x) = x</code>
<div class="highlight"><pre><span></span><code>contract Example =
// Exported
entrypoint exported_fun(x) = local_fun(x)
// Not exported
function local_fun(x) = x
</code></pre></div>
Functions in namespaces still use <code>function</code> (and <code>private function</code> for
private functions).</li>
<li>The return type of <code>Chain.block_hash(height)</code> has changed, it used to
@@ -1699,10 +1731,12 @@ and this project adheres to <a href="https://semver.org/spec/v2.0.0.html">Semant
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