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<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Make (containers.CCMap.Make)</title><link rel="stylesheet" href="../../../_odoc-theme/odoc.css"/><meta charset="utf-8"/><meta name="generator" content="odoc 2.3.1"/><meta name="viewport" content="width=device-width,initial-scale=1.0"/><script src="../../../highlight.pack.js"></script><script>hljs.initHighlightingOnLoad();</script></head><body class="odoc"><nav class="odoc-nav"><a href="../index.html">Up</a> – <a href="../../index.html">containers</a> » <a href="../index.html">CCMap</a> » Make</nav><header class="odoc-preamble"><h1>Module <code><span>CCMap.Make</span></code></h1></header><nav class="odoc-toc"><ul><li><a href="#parameters">Parameters</a></li><li><a href="#signature">Signature</a></li></ul></nav><div class="odoc-content"><h2 id="parameters"><a href="#parameters" class="anchor"></a>Parameters</h2><div class="odoc-spec"><div class="spec parameter anchored" id="argument-1-O"><a href="#argument-1-O" class="anchor"></a><code><span><span class="keyword">module</span> </span><span><a href="argument-1-O/index.html">O</a></span><span> : <a href="../../../ocaml/Stdlib/Map/module-type-OrderedType/index.html">Stdlib.Map.OrderedType</a></span></code></div></div><h2 id="signature"><a href="#signature" class="anchor"></a>Signature</h2><div class="odoc-include"><details open="open"><summary class="spec include"><code><span><span class="keyword">include</span> <a href="../../../ocaml/Stdlib/Map/module-type-S/index.html">Map.S</a> <span class="keyword">with</span> <span><span class="keyword">type</span> <span>'a <a href="../../../ocaml/Stdlib/Map/module-type-S/index.html#type-t">t</a></span> = <span><span class="type-var">'a</span> <a href="../../../ocaml/Stdlib/Map/Make/index.html#type-t">Map.Make(O).t</a></span></span> <span class="keyword">with</span> <span><span class="keyword">type</span> <a href="../../../ocaml/Stdlib/Map/module-type-S/index.html#type-key">key</a> = <a href="argument-1-O/index.html#type-t">O.t</a></span></span></code></summary><div class="odoc-spec"><div class="spec type anchored" id="type-key"><a href="#type-key" class="anchor"></a><code><span><span class="keyword">type</span> key</span><span> = <a href="argument-1-O/index.html#type-t">O.t</a></span></code></div><div class="spec-doc"><p>The type of the map keys.</p></div></div><div class="odoc-spec"><div class="spec type anchored" id="type-t"><a href="#type-t" class="anchor"></a><code><span><span class="keyword">type</span> <span>'a t</span></span><span> = <span><span class="type-var">'a</span> <a href="../../../ocaml/Stdlib/Map/Make/index.html#type-t">Stdlib.Map.Make(O).t</a></span></span></code></div><div class="spec-doc"><p>The type of maps from type <code>key</code> to type <code>'a</code>.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-empty"><a href="#val-empty" class="anchor"></a><code><span><span class="keyword">val</span> empty : <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p>The empty map.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-is_empty"><a href="#val-is_empty" class="anchor"></a><code><span><span class="keyword">val</span> is_empty : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> bool</span></code></div><div class="spec-doc"><p>Test whether a map is empty or not.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-mem"><a href="#val-mem" class="anchor"></a><code><span><span class="keyword">val</span> mem : <span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> bool</span></code></div><div class="spec-doc"><p><code>mem x m</code> returns <code>true</code> if <code>m</code> contains a binding for <code>x</code>, and <code>false</code> otherwise.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-add"><a href="#val-add" class="anchor"></a><code><span><span class="keyword">val</span> add : <span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>add key data m</code> returns a map containing the same bindings as <code>m</code>, plus a binding of <code>key</code> to <code>data</code>. If <code>key</code> was already bound in <code>m</code> to a value that is physically equal to <code>data</code>, <code>m</code> is returned unchanged (the result of the function is then physically equal to <code>m</code>). Otherwise, the previous binding of <code>key</code> in <code>m</code> disappears.</p><ul class="at-tags"><li class="before"><span class="at-tag">before</span> <span class="value">4.03</span> <p>Physical equality was not ensured.</p></li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-singleton"><a href="#val-singleton" class="anchor"></a><code><span><span class="keyword">val</span> singleton : <span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>singleton x y</code> returns the one-element map that contains a binding <code>y</code> for <code>x</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-remove"><a href="#val-remove" class="anchor"></a><code><span><span class="keyword">val</span> remove : <span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>remove x m</code> returns a map containing the same bindings as <code>m</code>, except for <code>x</code> which is unbound in the returned map. If <code>x</code> was not in <code>m</code>, <code>m</code> is returned unchanged (the result of the function is then physically equal to <code>m</code>).</p><ul class="at-tags"><li class="before"><span class="at-tag">before</span> <span class="value">4.03</span> <p>Physical equality was not ensured.</p></li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-merge"><a href="#val-merge" class="anchor"></a><code><span><span class="keyword">val</span> merge :
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<span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> option</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'b</span> option</span> <span class="arrow">-></span></span> <span><span class="type-var">'c</span> option</span>)</span> <span class="arrow">-></span></span>
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<span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span>
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<span><span><span class="type-var">'b</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span>
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<span><span class="type-var">'c</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>merge f m1 m2</code> computes a map whose keys are a subset of the keys of <code>m1</code> and of <code>m2</code>. The presence of each such binding, and the corresponding value, is determined with the function <code>f</code>. In terms of the <code>find_opt</code> operation, we have <code>find_opt x (merge f m1 m2) = f x (find_opt x m1) (find_opt x m2)</code> for any key <code>x</code>, provided that <code>f x None None = None</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-union"><a href="#val-union" class="anchor"></a><code><span><span class="keyword">val</span> union : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> option</span>)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>union f m1 m2</code> computes a map whose keys are a subset of the keys of <code>m1</code> and of <code>m2</code>. When the same binding is defined in both arguments, the function <code>f</code> is used to combine them. This is a special case of <code>merge</code>: <code>union f m1 m2</code> is equivalent to <code>merge f' m1 m2</code>, where</p><ul><li><code>f' _key None None = None</code></li><li><code>f' _key (Some v) None = Some v</code></li><li><code>f' _key None (Some v) = Some v</code></li><li><code>f' key (Some v1) (Some v2) = f key v1 v2</code></li></ul><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 4.03.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-compare"><a href="#val-compare" class="anchor"></a><code><span><span class="keyword">val</span> compare : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> int)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> int</span></code></div><div class="spec-doc"><p>Total ordering between maps. The first argument is a total ordering used to compare data associated with equal keys in the two maps.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-equal"><a href="#val-equal" class="anchor"></a><code><span><span class="keyword">val</span> equal : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> bool)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> bool</span></code></div><div class="spec-doc"><p><code>equal cmp m1 m2</code> tests whether the maps <code>m1</code> and <code>m2</code> are equal, that is, contain equal keys and associate them with equal data. <code>cmp</code> is the equality predicate used to compare the data associated with the keys.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-iter"><a href="#val-iter" class="anchor"></a><code><span><span class="keyword">val</span> iter : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> unit)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> unit</span></code></div><div class="spec-doc"><p><code>iter f m</code> applies <code>f</code> to all bindings in map <code>m</code>. <code>f</code> receives the key as first argument, and the associated value as second argument. The bindings are passed to <code>f</code> in increasing order with respect to the ordering over the type of the keys.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-fold"><a href="#val-fold" class="anchor"></a><code><span><span class="keyword">val</span> fold : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'b</span> <span class="arrow">-></span></span> <span class="type-var">'b</span>)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'b</span> <span class="arrow">-></span></span> <span class="type-var">'b</span></span></code></div><div class="spec-doc"><p><code>fold f m init</code> computes <code>(f kN dN ... (f k1 d1 init)...)</code>, where <code>k1 ... kN</code> are the keys of all bindings in <code>m</code> (in increasing order), and <code>d1 ... dN</code> are the associated data.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-for_all"><a href="#val-for_all" class="anchor"></a><code><span><span class="keyword">val</span> for_all : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> bool)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> bool</span></code></div><div class="spec-doc"><p><code>for_all f m</code> checks if all the bindings of the map satisfy the predicate <code>f</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-exists"><a href="#val-exists" class="anchor"></a><code><span><span class="keyword">val</span> exists : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> bool)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> bool</span></code></div><div class="spec-doc"><p><code>exists f m</code> checks if at least one binding of the map satisfies the predicate <code>f</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-filter"><a href="#val-filter" class="anchor"></a><code><span><span class="keyword">val</span> filter : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> bool)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>filter f m</code> returns the map with all the bindings in <code>m</code> that satisfy predicate <code>p</code>. If every binding in <code>m</code> satisfies <code>f</code>, <code>m</code> is returned unchanged (the result of the function is then physically equal to <code>m</code>)</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul><ul class="at-tags"><li class="before"><span class="at-tag">before</span> <span class="value">4.03</span> <p>Physical equality was not ensured.</p></li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-filter_map"><a href="#val-filter_map" class="anchor"></a><code><span><span class="keyword">val</span> filter_map : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'b</span> option</span>)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'b</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>filter_map f m</code> applies the function <code>f</code> to every binding of <code>m</code>, and builds a map from the results. For each binding <code>(k, v)</code> in the input map:</p><ul><li>if <code>f k v</code> is <code>None</code> then <code>k</code> is not in the result,</li><li>if <code>f k v</code> is <code>Some v'</code> then the binding <code>(k, v')</code> is in the output map.</li></ul><p>For example, the following function on maps whose values are lists</p><pre class="language-ocaml"><code>filter_map
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(fun _k li -> match li with [] -> None | _::tl -> Some tl)
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m</code></pre><p>drops all bindings of <code>m</code> whose value is an empty list, and pops the first element of each value that is non-empty.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 4.11.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-partition"><a href="#val-partition" class="anchor"></a><code><span><span class="keyword">val</span> partition : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> bool)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span> * <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>partition f m</code> returns a pair of maps <code>(m1, m2)</code>, where <code>m1</code> contains all the bindings of <code>m</code> that satisfy the predicate <code>f</code>, and <code>m2</code> is the map with all the bindings of <code>m</code> that do not satisfy <code>f</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-cardinal"><a href="#val-cardinal" class="anchor"></a><code><span><span class="keyword">val</span> cardinal : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> int</span></code></div><div class="spec-doc"><p>Return the number of bindings of a map.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-bindings"><a href="#val-bindings" class="anchor"></a><code><span><span class="keyword">val</span> bindings : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> list</span></span></code></div><div class="spec-doc"><p>Return the list of all bindings of the given map. The returned list is sorted in increasing order of keys with respect to the ordering <code>Ord.compare</code>, where <code>Ord</code> is the argument given to <a href="../../../ocaml/Stdlib/Map/Make/index.html"><code>Stdlib.Map.Make</code></a>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-min_binding"><a href="#val-min_binding" class="anchor"></a><code><span><span class="keyword">val</span> min_binding : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <a href="#type-key">key</a> * <span class="type-var">'a</span></span></code></div><div class="spec-doc"><p>Return the binding with the smallest key in a given map (with respect to the <code>Ord.compare</code> ordering), or raise <code>Not_found</code> if the map is empty.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-max_binding"><a href="#val-max_binding" class="anchor"></a><code><span><span class="keyword">val</span> max_binding : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <a href="#type-key">key</a> * <span class="type-var">'a</span></span></code></div><div class="spec-doc"><p>Same as <a href="#val-min_binding"><code>min_binding</code></a>, but returns the binding with the largest key in the given map.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-choose"><a href="#val-choose" class="anchor"></a><code><span><span class="keyword">val</span> choose : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <a href="#type-key">key</a> * <span class="type-var">'a</span></span></code></div><div class="spec-doc"><p>Return one binding of the given map, or raise <code>Not_found</code> if the map is empty. Which binding is chosen is unspecified, but equal bindings will be chosen for equal maps.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-split"><a href="#val-split" class="anchor"></a><code><span><span class="keyword">val</span> split : <span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span> * <span><span class="type-var">'a</span> option</span> * <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>split x m</code> returns a triple <code>(l, data, r)</code>, where <code>l</code> is the map with all the bindings of <code>m</code> whose key is strictly less than <code>x</code>; <code>r</code> is the map with all the bindings of <code>m</code> whose key is strictly greater than <code>x</code>; <code>data</code> is <code>None</code> if <code>m</code> contains no binding for <code>x</code>, or <code>Some v</code> if <code>m</code> binds <code>v</code> to <code>x</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.12.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-find"><a href="#val-find" class="anchor"></a><code><span><span class="keyword">val</span> find : <span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span class="type-var">'a</span></span></code></div><div class="spec-doc"><p><code>find x m</code> returns the current value of <code>x</code> in <code>m</code>, or raises <code>Not_found</code> if no binding for <code>x</code> exists.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-find_last"><a href="#val-find_last" class="anchor"></a><code><span><span class="keyword">val</span> find_last : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> bool)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <a href="#type-key">key</a> * <span class="type-var">'a</span></span></code></div><div class="spec-doc"><p><code>find_last f m</code>, where <code>f</code> is a monotonically decreasing function, returns the binding of <code>m</code> with the highest key <code>k</code> such that <code>f k</code>, or raises <code>Not_found</code> if no such key exists.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 4.05</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-find_last_opt"><a href="#val-find_last_opt" class="anchor"></a><code><span><span class="keyword">val</span> find_last_opt : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> bool)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> option</span></span></code></div><div class="spec-doc"><p><code>find_last_opt f m</code>, where <code>f</code> is a monotonically decreasing function, returns an option containing the binding of <code>m</code> with the highest key <code>k</code> such that <code>f k</code>, or <code>None</code> if no such key exists.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 4.05</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-map"><a href="#val-map" class="anchor"></a><code><span><span class="keyword">val</span> map : <span><span>(<span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span class="type-var">'b</span>)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'b</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>map f m</code> returns a map with same domain as <code>m</code>, where the associated value <code>a</code> of all bindings of <code>m</code> has been replaced by the result of the application of <code>f</code> to <code>a</code>. The bindings are passed to <code>f</code> in increasing order with respect to the ordering over the type of the keys.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-mapi"><a href="#val-mapi" class="anchor"></a><code><span><span class="keyword">val</span> mapi : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span class="type-var">'b</span>)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'b</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p>Same as <a href="#val-map"><code>map</code></a>, but the function receives as arguments both the key and the associated value for each binding of the map.</p></div></div><h2 id="maps-and-sequences"><a href="#maps-and-sequences" class="anchor"></a>Maps and Sequences</h2><div class="odoc-spec"><div class="spec value anchored" id="val-to_seq"><a href="#val-to_seq" class="anchor"></a><code><span><span class="keyword">val</span> to_seq : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../../../ocaml/Stdlib/Seq/index.html#type-t">Stdlib.Seq.t</a></span></span></code></div><div class="spec-doc"><p>Iterate on the whole map, in ascending order of keys</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 4.07</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-to_rev_seq"><a href="#val-to_rev_seq" class="anchor"></a><code><span><span class="keyword">val</span> to_rev_seq : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../../../ocaml/Stdlib/Seq/index.html#type-t">Stdlib.Seq.t</a></span></span></code></div><div class="spec-doc"><p>Iterate on the whole map, in descending order of keys</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 4.12</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-to_seq_from"><a href="#val-to_seq_from" class="anchor"></a><code><span><span class="keyword">val</span> to_seq_from : <span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../../../ocaml/Stdlib/Seq/index.html#type-t">Stdlib.Seq.t</a></span></span></code></div><div class="spec-doc"><p><code>to_seq_from k m</code> iterates on a subset of the bindings of <code>m</code>, in ascending order of keys, from key <code>k</code> or above.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 4.07</li></ul></div></div></details></div><div class="odoc-spec"><div class="spec value anchored" id="val-get"><a href="#val-get" class="anchor"></a><code><span><span class="keyword">val</span> get : <span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> option</span></span></code></div><div class="spec-doc"><p><code>get k m</code> returns <code>Some v</code> if the current binding of <code>k</code> in <code>m</code> is <code>v</code>, or <code>None</code> if the key <code>k</code> is not present. Safe version of <a href="#val-find"><code>find</code></a>.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-get_or"><a href="#val-get_or" class="anchor"></a><code><span><span class="keyword">val</span> get_or : <span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="label">default</span>:<span class="type-var">'a</span> <span class="arrow">-></span></span> <span class="type-var">'a</span></span></code></div><div class="spec-doc"><p><code>get_or k m ~default</code> returns the value associated to <code>k</code> if present, and returns <code>default</code> otherwise (if <code>k</code> doesn't belong in <code>m</code>).</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 0.16</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-update"><a href="#val-update" class="anchor"></a><code><span><span class="keyword">val</span> update : <span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span>(<span><span><span class="type-var">'a</span> option</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> option</span>)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>update k f m</code> calls <code>f (Some v)</code> if <code>find k m = v</code>, otherwise it calls <code>f None</code>. In any case, if the result is <code>None</code> <code>k</code> is removed from <code>m</code>, and if the result is <code>Some v'</code> then <code>add k v' m</code> is returned.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-choose_opt"><a href="#val-choose_opt" class="anchor"></a><code><span><span class="keyword">val</span> choose_opt : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> option</span></span></code></div><div class="spec-doc"><p><code>choose_opt m</code> returns one binding of the given map <code>m</code>, or <code>None</code> if <code>m</code> is empty. Safe version of <a href="#val-choose"><code>choose</code></a>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 1.5</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-min_binding_opt"><a href="#val-min_binding_opt" class="anchor"></a><code><span><span class="keyword">val</span> min_binding_opt : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> option</span></span></code></div><div class="spec-doc"><p><code>min_binding_opt m</code> returns the smallest binding of the given map <code>m</code>, or <code>None</code> if <code>m</code> is empty. Safe version of <a href="#val-min_binding"><code>min_binding</code></a>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 1.5</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-max_binding_opt"><a href="#val-max_binding_opt" class="anchor"></a><code><span><span class="keyword">val</span> max_binding_opt : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> option</span></span></code></div><div class="spec-doc"><p><code>max_binding_opt m</code> returns the largest binding of the given map <code>m</code>, or <code>None</code> if <code>m</code> is empty. Safe version of <a href="#val-max_binding"><code>max_binding</code></a>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 1.5</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-find_opt"><a href="#val-find_opt" class="anchor"></a><code><span><span class="keyword">val</span> find_opt : <span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> option</span></span></code></div><div class="spec-doc"><p><code>find_opt k m</code> returns <code>Some v</code> if the current binding of <code>k</code> in <code>m</code> is <code>v</code>, or <code>None</code> if the key <code>k</code> is not present. Safe version of <a href="#val-find"><code>find</code></a>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 1.5</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-find_first"><a href="#val-find_first" class="anchor"></a><code><span><span class="keyword">val</span> find_first : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> bool)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <a href="#type-key">key</a> * <span class="type-var">'a</span></span></code></div><div class="spec-doc"><p><code>find_first f m</code> where <code>f</code> is a monotonically increasing function, returns the binding of <code>m</code> with the lowest key <code>k</code> such that <code>f k</code>, or raises <code>Not_found</code> if no such key exists. See <code>Map.S.find_first</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 1.5</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-find_first_opt"><a href="#val-find_first_opt" class="anchor"></a><code><span><span class="keyword">val</span> find_first_opt : <span><span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> bool)</span> <span class="arrow">-></span></span> <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> option</span></span></code></div><div class="spec-doc"><p><code>find_first_opt f m</code> where <code>f</code> is a monotonically increasing function, returns an option containing the binding of <code>m</code> with the lowest key <code>k</code> such that <code>f k</code>, or <code>None</code> if no such key exists. Safe version of <a href="#val-find_first"><code>find_first</code></a>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 1.5</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-merge_safe"><a href="#val-merge_safe" class="anchor"></a><code><span><span class="keyword">val</span> merge_safe :
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||
<span><span class="label">f</span>:<span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span>[ <span>`Left of <span class="type-var">'a</span></span> <span><span>| `Right</span> of <span class="type-var">'b</span></span> <span><span>| `Both</span> of <span class="type-var">'a</span> * <span class="type-var">'b</span></span> ]</span> <span class="arrow">-></span></span> <span><span class="type-var">'c</span> option</span>)</span> <span class="arrow">-></span></span>
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||
<span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span>
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||
<span><span><span class="type-var">'b</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span>
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||
<span><span class="type-var">'c</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>merge_safe ~f a b</code> merges the maps <code>a</code> and <code>b</code> together.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 0.17</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-add_seq"><a href="#val-add_seq" class="anchor"></a><code><span><span class="keyword">val</span> add_seq : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../../../ocaml/Stdlib/Seq/index.html#type-t">Stdlib.Seq.t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>add_seq m seq</code> adds the given <code>Seq.t</code> of bindings to the map <code>m</code>. Like <a href="#val-add_list"><code>add_list</code></a>. Renamed from <code>add_std_seq</code> since 3.0.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-add_seq_with"><a href="#val-add_seq_with" class="anchor"></a><code><span><span class="keyword">val</span> add_seq_with :
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||
<span><span class="label">f</span>:<span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span class="type-var">'a</span>)</span> <span class="arrow">-></span></span>
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||
<span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span>
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<span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../../../ocaml/Stdlib/Seq/index.html#type-t">Stdlib.Seq.t</a></span> <span class="arrow">-></span></span>
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<span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>add_seq ~f m l</code> adds the given seq <code>l</code> of bindings to the map <code>m</code>, using <code>f</code> to combine values that have the same key. If a key occurs several times, all its bindings are combined using the function <code>f</code>, with <code>f key v1 v2</code> being called with <code>v1</code> occurring later in the seq than <code>v2</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.3</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-of_seq"><a href="#val-of_seq" class="anchor"></a><code><span><span class="keyword">val</span> of_seq : <span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../../../ocaml/Stdlib/Seq/index.html#type-t">Stdlib.Seq.t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>of_seq seq</code> builds a map from the given <code>Seq.t</code> of bindings. Like <a href="#val-of_list"><code>of_list</code></a>. Renamed from <code>of_std_seq</code> since 3.0.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.0</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-of_seq_with"><a href="#val-of_seq_with" class="anchor"></a><code><span><span class="keyword">val</span> of_seq_with : <span><span class="label">f</span>:<span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span class="type-var">'a</span>)</span> <span class="arrow">-></span></span> <span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../../../ocaml/Stdlib/Seq/index.html#type-t">Stdlib.Seq.t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>of_seq_with ~f l</code> builds a map from the given seq <code>l</code> of bindings <code>k_i -> v_i</code>, added in order using <a href="#val-add"><code>add</code></a>. If a key occurs several times, all its bindings are combined using the function <code>f</code>, with <code>f key v1 v2</code> being called with <code>v1</code> occurring later in the seq than <code>v2</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.3</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-add_iter"><a href="#val-add_iter" class="anchor"></a><code><span><span class="keyword">val</span> add_iter : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../index.html#type-iter">iter</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>add_iter m iter</code> adds the given <code>iter</code> of bindings to the map <code>m</code>. Like <a href="#val-add_list"><code>add_list</code></a>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 2.8</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-add_iter_with"><a href="#val-add_iter_with" class="anchor"></a><code><span><span class="keyword">val</span> add_iter_with :
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<span><span class="label">f</span>:<span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span class="type-var">'a</span>)</span> <span class="arrow">-></span></span>
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<span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span>
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<span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../index.html#type-iter">iter</a></span> <span class="arrow">-></span></span>
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<span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>add_iter ~f m l</code> adds the given iter <code>l</code> of bindings to the map <code>m</code>, using <code>f</code> to combine values that have the same key. If a key occurs several times, all its bindings are combined using the function <code>f</code>, with <code>f key v1 v2</code> being called with <code>v1</code> occurring later in the seq than <code>v2</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.3</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-of_iter"><a href="#val-of_iter" class="anchor"></a><code><span><span class="keyword">val</span> of_iter : <span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../index.html#type-iter">iter</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>of_iter iter</code> builds a map from the given <code>iter</code> of bindings. Like <a href="#val-of_list"><code>of_list</code></a>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 2.8</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-of_iter_with"><a href="#val-of_iter_with" class="anchor"></a><code><span><span class="keyword">val</span> of_iter_with : <span><span class="label">f</span>:<span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span class="type-var">'a</span>)</span> <span class="arrow">-></span></span> <span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../index.html#type-iter">iter</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>of_iter_with ~f l</code> builds a map from the given iter <code>l</code> of bindings <code>k_i -> v_i</code>, added in order using <a href="#val-add"><code>add</code></a>. If a key occurs several times, all its bindings are combined using the function <code>f</code>, with <code>f key v1 v2</code> being called with <code>v1</code> occurring later in the iter than <code>v2</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.3</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-to_iter"><a href="#val-to_iter" class="anchor"></a><code><span><span class="keyword">val</span> to_iter : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> <a href="../index.html#type-iter">iter</a></span></span></code></div><div class="spec-doc"><p><code>to_iter m</code> iterates on the whole map <code>m</code>, creating an <code>iter</code> of bindings. Like <a href="#val-to_list"><code>to_list</code></a>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 2.8</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-of_list"><a href="#val-of_list" class="anchor"></a><code><span><span class="keyword">val</span> of_list : <span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> list</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>of_list l</code> builds a map from the given list <code>l</code> of bindings <code>k_i -> v_i</code>, added in order using <a href="#val-add"><code>add</code></a>. If a key occurs several times, only its last binding will be present in the result.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-of_list_with"><a href="#val-of_list_with" class="anchor"></a><code><span><span class="keyword">val</span> of_list_with : <span><span class="label">f</span>:<span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span class="type-var">'a</span>)</span> <span class="arrow">-></span></span> <span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> list</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>of_list_with ~f l</code> builds a map from the given list <code>l</code> of bindings <code>k_i -> v_i</code>, added in order using <a href="#val-add"><code>add</code></a>. If a key occurs several times, all its bindings are combined using the function <code>f</code>, with <code>f key v1 v2</code> being called with <code>v1</code> occurring later in the list than <code>v2</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.3</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-add_list"><a href="#val-add_list" class="anchor"></a><code><span><span class="keyword">val</span> add_list : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> list</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>add_list m l</code> adds the given list <code>l</code> of bindings to the map <code>m</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 0.14</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-add_list_with"><a href="#val-add_list_with" class="anchor"></a><code><span><span class="keyword">val</span> add_list_with :
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<span><span class="label">f</span>:<span>(<span><a href="#type-key">key</a> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <span class="arrow">-></span></span> <span class="type-var">'a</span>)</span> <span class="arrow">-></span></span>
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<span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span>
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<span><span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> list</span> <span class="arrow">-></span></span>
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<span><span class="type-var">'a</span> <a href="#type-t">t</a></span></span></code></div><div class="spec-doc"><p><code>add_list ~f m l</code> adds the given list <code>l</code> of bindings to the map <code>m</code>, using <code>f</code> to combine values that have the same key. If a key occurs several times, all its bindings are combined using the function <code>f</code>, with <code>f key v1 v2</code> being called with <code>v1</code> occurring later in the seq than <code>v2</code>.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 3.3</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-keys"><a href="#val-keys" class="anchor"></a><code><span><span class="keyword">val</span> keys : <span><span><span class="type-var">_</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><a href="#type-key">key</a> <a href="../index.html#type-iter">iter</a></span></span></code></div><div class="spec-doc"><p><code>keys m</code> iterates on the keys of <code>m</code> only, creating an <code>iter</code> of keys.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 0.15</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-values"><a href="#val-values" class="anchor"></a><code><span><span class="keyword">val</span> values : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span class="type-var">'a</span> <a href="../index.html#type-iter">iter</a></span></span></code></div><div class="spec-doc"><p><code>values m</code> iterates on the values of <code>m</code> only, creating an <code>iter</code> of values.</p><ul class="at-tags"><li class="since"><span class="at-tag">since</span> 0.15</li></ul></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-to_list"><a href="#val-to_list" class="anchor"></a><code><span><span class="keyword">val</span> to_list : <span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <span class="arrow">-></span></span> <span><span>(<a href="#type-key">key</a> * <span class="type-var">'a</span>)</span> list</span></span></code></div><div class="spec-doc"><p><code>to_list m</code> builds a list of the bindings of the given map <code>m</code>. The order is unspecified.</p></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-pp"><a href="#val-pp" class="anchor"></a><code><span><span class="keyword">val</span> pp :
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<span><span class="optlabel">?pp_start</span>:<span>unit <a href="../index.html#type-printer">printer</a></span> <span class="arrow">-></span></span>
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<span><span class="optlabel">?pp_stop</span>:<span>unit <a href="../index.html#type-printer">printer</a></span> <span class="arrow">-></span></span>
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<span><span class="optlabel">?pp_arrow</span>:<span>unit <a href="../index.html#type-printer">printer</a></span> <span class="arrow">-></span></span>
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<span><span class="optlabel">?pp_sep</span>:<span>unit <a href="../index.html#type-printer">printer</a></span> <span class="arrow">-></span></span>
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<span><span><a href="#type-key">key</a> <a href="../index.html#type-printer">printer</a></span> <span class="arrow">-></span></span>
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<span><span><span class="type-var">'a</span> <a href="../index.html#type-printer">printer</a></span> <span class="arrow">-></span></span>
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<span><span><span class="type-var">'a</span> <a href="#type-t">t</a></span> <a href="../index.html#type-printer">printer</a></span></span></code></div><div class="spec-doc"><p><code>pp ?pp_start ?pp_stop ?pp_arrow ?pp_sep pp_key pp_v m</code> pretty-prints the contents of the map.</p></div></div></div></body></html>
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