Minor changes in existing modules.

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Pepijn Kokke 2017-03-11 23:00:02 +00:00
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7 changed files with 6114 additions and 6166 deletions

1
.gitignore vendored
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@ -1,2 +1,3 @@
_site/
.sass-cache/
*.agdai

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@ -4,49 +4,35 @@ layout : page
permalink : /Basics
---
<div class="hidden">
<div class="foldable">
<pre class="Agda">{% raw %}
<a name="134" class="Keyword"
>module</a
<a name="136" class="Keyword"
>open</a
><a name="140"
> </a
><a name="141" href="Basics.html#1" class="Module"
>Basics</a
><a name="141" class="Keyword"
>import</a
><a name="147"
> </a
><a name="148" class="Keyword"
>where</a
><a name="153"
>
</a
><a name="157" class="Keyword"
>open</a
><a name="161"
> </a
><a name="162" class="Keyword"
>import</a
><a name="168"
> </a
><a name="169" href="https://agda.github.io/agda-stdlib/Relation.Binary.PropositionalEquality.html#1" class="Module"
><a name="148" href="https://agda.github.io/agda-stdlib/Relation.Binary.PropositionalEquality.html#1" class="Module"
>Relation.Binary.PropositionalEquality</a
><a name="206"
><a name="185"
> </a
><a name="207" class="Keyword"
><a name="186" class="Keyword"
>using</a
><a name="212"
><a name="191"
> </a
><a name="213" class="Symbol"
><a name="192" class="Symbol"
>(</a
><a name="214" href="Agda.Builtin.Equality.html#83" class="Datatype Operator"
><a name="193" href="Agda.Builtin.Equality.html#83" class="Datatype Operator"
>_&#8801;_</a
><a name="217" class="Symbol"
><a name="196" class="Symbol"
>;</a
><a name="218"
><a name="197"
> </a
><a name="219" href="Agda.Builtin.Equality.html#140" class="InductiveConstructor"
><a name="198" href="Agda.Builtin.Equality.html#140" class="InductiveConstructor"
>refl</a
><a name="223" class="Symbol"
><a name="202" class="Symbol"
>)</a
>
{% endraw %}</pre>
@ -106,114 +92,114 @@ The following declaration tells Agda that we are defining
a new set of data values -- a *type*.
<pre class="Agda">{% raw %}
<a name="2564" class="Keyword"
<a name="2541" class="Keyword"
>data</a
><a name="2568"
><a name="2545"
> </a
><a name="2569" href="Basics.html#2569" class="Datatype"
><a name="2546" href="Basics.html#2546" class="Datatype"
>Day</a
><a name="2572"
><a name="2549"
> </a
><a name="2573" class="Symbol"
><a name="2550" class="Symbol"
>:</a
><a name="2574"
><a name="2551"
> </a
><a name="2575" class="PrimitiveType"
><a name="2552" class="PrimitiveType"
>Set</a
><a name="2578"
><a name="2555"
> </a
><a name="2579" class="Keyword"
><a name="2556" class="Keyword"
>where</a
><a name="2584"
><a name="2561"
>
</a
><a name="2589" href="Basics.html#2589" class="InductiveConstructor"
</a
><a name="2564" href="Basics.html#2564" class="InductiveConstructor"
>monday</a
><a name="2595"
><a name="2570"
> </a
><a name="2599" class="Symbol"
><a name="2574" class="Symbol"
>:</a
><a name="2600"
><a name="2575"
> </a
><a name="2601" href="Basics.html#2569" class="Datatype"
><a name="2576" href="Basics.html#2546" class="Datatype"
>Day</a
><a name="2604"
><a name="2579"
>
</a
><a name="2609" href="Basics.html#2609" class="InductiveConstructor"
</a
><a name="2582" href="Basics.html#2582" class="InductiveConstructor"
>tuesday</a
><a name="2616"
><a name="2589"
> </a
><a name="2619" class="Symbol"
><a name="2592" class="Symbol"
>:</a
><a name="2620"
><a name="2593"
> </a
><a name="2621" href="Basics.html#2569" class="Datatype"
><a name="2594" href="Basics.html#2546" class="Datatype"
>Day</a
><a name="2624"
><a name="2597"
>
</a
><a name="2629" href="Basics.html#2629" class="InductiveConstructor"
</a
><a name="2600" href="Basics.html#2600" class="InductiveConstructor"
>wednesday</a
><a name="2638"
><a name="2609"
> </a
><a name="2639" class="Symbol"
><a name="2610" class="Symbol"
>:</a
><a name="2640"
><a name="2611"
> </a
><a name="2641" href="Basics.html#2569" class="Datatype"
><a name="2612" href="Basics.html#2546" class="Datatype"
>Day</a
><a name="2644"
><a name="2615"
>
</a
><a name="2649" href="Basics.html#2649" class="InductiveConstructor"
</a
><a name="2618" href="Basics.html#2618" class="InductiveConstructor"
>thursday</a
><a name="2657"
><a name="2626"
> </a
><a name="2659" class="Symbol"
><a name="2628" class="Symbol"
>:</a
><a name="2660"
><a name="2629"
> </a
><a name="2661" href="Basics.html#2569" class="Datatype"
><a name="2630" href="Basics.html#2546" class="Datatype"
>Day</a
><a name="2664"
><a name="2633"
>
</a
><a name="2669" href="Basics.html#2669" class="InductiveConstructor"
</a
><a name="2636" href="Basics.html#2636" class="InductiveConstructor"
>friday</a
><a name="2675"
><a name="2642"
> </a
><a name="2679" class="Symbol"
><a name="2646" class="Symbol"
>:</a
><a name="2680"
><a name="2647"
> </a
><a name="2681" href="Basics.html#2569" class="Datatype"
><a name="2648" href="Basics.html#2546" class="Datatype"
>Day</a
><a name="2684"
><a name="2651"
>
</a
><a name="2689" href="Basics.html#2689" class="InductiveConstructor"
</a
><a name="2654" href="Basics.html#2654" class="InductiveConstructor"
>saturday</a
><a name="2697"
><a name="2662"
> </a
><a name="2699" class="Symbol"
><a name="2664" class="Symbol"
>:</a
><a name="2700"
><a name="2665"
> </a
><a name="2701" href="Basics.html#2569" class="Datatype"
><a name="2666" href="Basics.html#2546" class="Datatype"
>Day</a
><a name="2704"
><a name="2669"
>
</a
><a name="2709" href="Basics.html#2709" class="InductiveConstructor"
</a
><a name="2672" href="Basics.html#2672" class="InductiveConstructor"
>sunday</a
><a name="2715"
><a name="2678"
> </a
><a name="2719" class="Symbol"
><a name="2682" class="Symbol"
>:</a
><a name="2720"
><a name="2683"
> </a
><a name="2721" href="Basics.html#2569" class="Datatype"
><a name="2684" href="Basics.html#2546" class="Datatype"
>Day</a
>
{% endraw %}</pre>
@ -226,142 +212,142 @@ Having defined `day`, we can write functions that operate on
days.
<pre class="Agda">{% raw %}
<a name="3005" href="Basics.html#3005" class="Function"
<a name="2966" href="Basics.html#2966" class="Function"
>nextWeekday</a
><a name="3016"
><a name="2977"
> </a
><a name="3017" class="Symbol"
><a name="2978" class="Symbol"
>:</a
><a name="3018"
><a name="2979"
> </a
><a name="3019" href="Basics.html#2569" class="Datatype"
><a name="2980" href="Basics.html#2546" class="Datatype"
>Day</a
><a name="3022"
><a name="2983"
> </a
><a name="3023" class="Symbol"
><a name="2984" class="Symbol"
>-&gt;</a
><a name="3025"
><a name="2986"
> </a
><a name="3026" href="Basics.html#2569" class="Datatype"
><a name="2987" href="Basics.html#2546" class="Datatype"
>Day</a
><a name="3029"
><a name="2990"
>
</a
><a name="3032" href="Basics.html#3005" class="Function"
</a
><a name="2991" href="Basics.html#2966" class="Function"
>nextWeekday</a
><a name="3043"
><a name="3002"
> </a
><a name="3044" href="Basics.html#2589" class="InductiveConstructor"
><a name="3003" href="Basics.html#2564" class="InductiveConstructor"
>monday</a
><a name="3050"
><a name="3009"
> </a
><a name="3054" class="Symbol"
><a name="3013" class="Symbol"
>=</a
><a name="3055"
><a name="3014"
> </a
><a name="3056" href="Basics.html#2609" class="InductiveConstructor"
><a name="3015" href="Basics.html#2582" class="InductiveConstructor"
>tuesday</a
><a name="3063"
><a name="3022"
>
</a
><a name="3066" href="Basics.html#3005" class="Function"
</a
><a name="3023" href="Basics.html#2966" class="Function"
>nextWeekday</a
><a name="3077"
><a name="3034"
> </a
><a name="3078" href="Basics.html#2609" class="InductiveConstructor"
><a name="3035" href="Basics.html#2582" class="InductiveConstructor"
>tuesday</a
><a name="3085"
><a name="3042"
> </a
><a name="3088" class="Symbol"
><a name="3045" class="Symbol"
>=</a
><a name="3089"
><a name="3046"
> </a
><a name="3090" href="Basics.html#2629" class="InductiveConstructor"
><a name="3047" href="Basics.html#2600" class="InductiveConstructor"
>wednesday</a
><a name="3099"
><a name="3056"
>
</a
><a name="3102" href="Basics.html#3005" class="Function"
</a
><a name="3057" href="Basics.html#2966" class="Function"
>nextWeekday</a
><a name="3068"
> </a
><a name="3069" href="Basics.html#2600" class="InductiveConstructor"
>wednesday</a
><a name="3078"
> </a
><a name="3079" class="Symbol"
>=</a
><a name="3080"
> </a
><a name="3081" href="Basics.html#2618" class="InductiveConstructor"
>thursday</a
><a name="3089"
>
</a
><a name="3090" href="Basics.html#2966" class="Function"
>nextWeekday</a
><a name="3101"
> </a
><a name="3102" href="Basics.html#2618" class="InductiveConstructor"
>thursday</a
><a name="3110"
> </a
><a name="3112" class="Symbol"
>=</a
><a name="3113"
> </a
><a name="3114" href="Basics.html#2629" class="InductiveConstructor"
>wednesday</a
><a name="3123"
> </a
><a name="3124" class="Symbol"
>=</a
><a name="3125"
> </a
><a name="3126" href="Basics.html#2649" class="InductiveConstructor"
>thursday</a
><a name="3134"
>
</a
><a name="3137" href="Basics.html#3005" class="Function"
>nextWeekday</a
><a name="3148"
> </a
><a name="3149" href="Basics.html#2649" class="InductiveConstructor"
>thursday</a
><a name="3157"
> </a
><a name="3159" class="Symbol"
>=</a
><a name="3160"
> </a
><a name="3161" href="Basics.html#2669" class="InductiveConstructor"
><a name="3114" href="Basics.html#2636" class="InductiveConstructor"
>friday</a
><a name="3167"
><a name="3120"
>
</a
><a name="3170" href="Basics.html#3005" class="Function"
</a
><a name="3121" href="Basics.html#2966" class="Function"
>nextWeekday</a
><a name="3181"
><a name="3132"
> </a
><a name="3182" href="Basics.html#2669" class="InductiveConstructor"
><a name="3133" href="Basics.html#2636" class="InductiveConstructor"
>friday</a
><a name="3188"
><a name="3139"
> </a
><a name="3192" class="Symbol"
><a name="3143" class="Symbol"
>=</a
><a name="3193"
><a name="3144"
> </a
><a name="3194" href="Basics.html#2589" class="InductiveConstructor"
><a name="3145" href="Basics.html#2564" class="InductiveConstructor"
>monday</a
><a name="3200"
><a name="3151"
>
</a
><a name="3203" href="Basics.html#3005" class="Function"
</a
><a name="3152" href="Basics.html#2966" class="Function"
>nextWeekday</a
><a name="3214"
><a name="3163"
> </a
><a name="3215" href="Basics.html#2689" class="InductiveConstructor"
><a name="3164" href="Basics.html#2654" class="InductiveConstructor"
>saturday</a
><a name="3223"
><a name="3172"
> </a
><a name="3225" class="Symbol"
><a name="3174" class="Symbol"
>=</a
><a name="3226"
><a name="3175"
> </a
><a name="3227" href="Basics.html#2589" class="InductiveConstructor"
><a name="3176" href="Basics.html#2564" class="InductiveConstructor"
>monday</a
><a name="3233"
><a name="3182"
>
</a
><a name="3236" href="Basics.html#3005" class="Function"
</a
><a name="3183" href="Basics.html#2966" class="Function"
>nextWeekday</a
><a name="3247"
><a name="3194"
> </a
><a name="3248" href="Basics.html#2709" class="InductiveConstructor"
><a name="3195" href="Basics.html#2672" class="InductiveConstructor"
>sunday</a
><a name="3254"
><a name="3201"
> </a
><a name="3258" class="Symbol"
><a name="3205" class="Symbol"
>=</a
><a name="3259"
><a name="3206"
> </a
><a name="3260" href="Basics.html#2589" class="InductiveConstructor"
><a name="3207" href="Basics.html#2564" class="InductiveConstructor"
>monday</a
>
{% endraw %}</pre>
@ -388,35 +374,35 @@ Second, we can record what we *expect* the result to be in the
form of an Agda type:
<pre class="Agda">{% raw %}
<a name="4224" href="Basics.html#4224" class="Function Operator"
<a name="4169" href="Basics.html#4169" class="Function Operator"
>test_nextWeekday</a
><a name="4240"
><a name="4185"
> </a
><a name="4241" class="Symbol"
><a name="4186" class="Symbol"
>:</a
><a name="4242"
><a name="4187"
> </a
><a name="4243" href="Basics.html#3005" class="Function"
><a name="4188" href="Basics.html#2966" class="Function"
>nextWeekday</a
><a name="4254"
><a name="4199"
> </a
><a name="4255" class="Symbol"
><a name="4200" class="Symbol"
>(</a
><a name="4256" href="Basics.html#3005" class="Function"
><a name="4201" href="Basics.html#2966" class="Function"
>nextWeekday</a
><a name="4267"
><a name="4212"
> </a
><a name="4268" href="Basics.html#2689" class="InductiveConstructor"
><a name="4213" href="Basics.html#2654" class="InductiveConstructor"
>saturday</a
><a name="4276" class="Symbol"
><a name="4221" class="Symbol"
>)</a
><a name="4277"
><a name="4222"
> </a
><a name="4278" href="Agda.Builtin.Equality.html#83" class="Datatype Operator"
><a name="4223" href="Agda.Builtin.Equality.html#83" class="Datatype Operator"
>&#8801;</a
><a name="4279"
><a name="4224"
> </a
><a name="4280" href="Basics.html#2609" class="InductiveConstructor"
><a name="4225" href="Basics.html#2582" class="InductiveConstructor"
>tuesday</a
>
{% endraw %}</pre>
@ -429,15 +415,15 @@ Having made the assertion, we must also verify it. We do this by giving
a term of the above type:
<pre class="Agda">{% raw %}
<a name="4601" href="Basics.html#4224" class="Function Operator"
<a name="4544" href="Basics.html#4169" class="Function Operator"
>test_nextWeekday</a
><a name="4617"
><a name="4560"
> </a
><a name="4618" class="Symbol"
><a name="4561" class="Symbol"
>=</a
><a name="4619"
><a name="4562"
> </a
><a name="4620" href="Agda.Builtin.Equality.html#140" class="InductiveConstructor"
><a name="4563" href="Agda.Builtin.Equality.html#140" class="InductiveConstructor"
>refl</a
>
{% endraw %}</pre>

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@ -4,11 +4,9 @@ layout : page
permalink : /Basics
---
<div class="hidden">
<div class="foldable">
\begin{code}
module Basics where
open import Relation.Binary.PropositionalEquality using (_≡_; refl)
open import Relation.Binary.PropositionalEquality using (_≡_; refl)
\end{code}
</div>
@ -66,14 +64,14 @@ The following declaration tells Agda that we are defining
a new set of data values -- a *type*.
\begin{code}
data Day : Set where
monday : Day
tuesday : Day
wednesday : Day
thursday : Day
friday : Day
saturday : Day
sunday : Day
data Day : Set where
monday : Day
tuesday : Day
wednesday : Day
thursday : Day
friday : Day
saturday : Day
sunday : Day
\end{code}
The type is called `day`, and its members are `monday`,
@ -84,14 +82,14 @@ Having defined `day`, we can write functions that operate on
days.
\begin{code}
nextWeekday : Day -> Day
nextWeekday monday = tuesday
nextWeekday tuesday = wednesday
nextWeekday wednesday = thursday
nextWeekday thursday = friday
nextWeekday friday = monday
nextWeekday saturday = monday
nextWeekday sunday = monday
nextWeekday : Day -> Day
nextWeekday monday = tuesday
nextWeekday tuesday = wednesday
nextWeekday wednesday = thursday
nextWeekday thursday = friday
nextWeekday friday = monday
nextWeekday saturday = monday
nextWeekday sunday = monday
\end{code}
One thing to note is that the argument and return types of
@ -116,7 +114,7 @@ Second, we can record what we *expect* the result to be in the
form of an Agda type:
\begin{code}
test_nextWeekday : nextWeekday (nextWeekday saturday) ≡ tuesday
test_nextWeekday : nextWeekday (nextWeekday saturday) ≡ tuesday
\end{code}
This declaration does two things: it makes an assertion (that the second
@ -127,7 +125,7 @@ Having made the assertion, we must also verify it. We do this by giving
a term of the above type:
\begin{code}
test_nextWeekday = refl
test_nextWeekday = refl
\end{code}
There is no essential difference between the definition for

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@ -4,10 +4,7 @@ layout : page
permalink : /Stlc
---
\begin{code}
module Stlc where
\end{code}
<div class="foldable">
\begin{code}
open import Maps using (Id; id; _≟_; PartialMap; module PartialMap)
open import Data.Empty using (⊥; ⊥-elim)
@ -18,6 +15,7 @@ open import Function using (_∘_; _$_)
open import Relation.Nullary using (Dec; yes; no)
open import Relation.Binary.PropositionalEquality using (_≡_; _≢_; refl)
\end{code}
</div>
# Stlc: The Simply Typed Lambda-Calculus

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@ -4,11 +4,13 @@ layout : page
permalink : /StlcProp
---
\begin{code}
module StlcProp where
\end{code}
# Properties of STLC
<div class="hidden">
In this chapter, we develop the fundamental theory of the Simply
Typed Lambda Calculus -- in particular, the type safety
theorem.
<div class="foldable">
\begin{code}
open import Function using (_∘_)
open import Data.Empty using (⊥; ⊥-elim)
@ -22,13 +24,6 @@ open import Stlc
\end{code}
</div>
# Properties of STLC
In this chapter, we develop the fundamental theory of the Simply
Typed Lambda Calculus -- in particular, the type safety
theorem.
## Canonical Forms
As we saw for the simple calculus in the [Stlc](Stlc.html) chapter, the