author | Tony Garnock-Jones <tonyg@kcbbs.gen.nz> |
Wed, 31 Aug 2005 10:14:14 +1200 | |
changeset 8 | 7e193a2d4679 |
permissions | -rw-r--r-- |
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
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" |
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Experiments in TNG syntax; skeletal emacs-mode
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
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So, let's assume data constructors for |
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Experiments in TNG syntax; skeletal emacs-mode
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
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- labelled product types |
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- unlabelled product types |
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Experiments in TNG syntax; skeletal emacs-mode
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
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What about sum types? What about lists? |
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Experiments in TNG syntax; skeletal emacs-mode
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
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label: value label: value label: value |
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Experiments in TNG syntax; skeletal emacs-mode
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a, b, c |
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Experiments in TNG syntax; skeletal emacs-mode
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Experiments in TNG syntax; skeletal emacs-mode
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Core lazy lambda: |
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
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Experiments in TNG syntax; skeletal emacs-mode
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- application |
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Experiments in TNG syntax; skeletal emacs-mode
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- abstraction |
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Experiments in TNG syntax; skeletal emacs-mode
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Reinterpreting these in a reflective lambda: |
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Experiments in TNG syntax; skeletal emacs-mode
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Experiments in TNG syntax; skeletal emacs-mode
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- split application up: |
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Experiments in TNG syntax; skeletal emacs-mode
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- substitution |
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- evaluation |
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- abstraction stays. |
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Experiments in TNG syntax; skeletal emacs-mode
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Syntax for lazy lambda: |
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- application: adjacency? |
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Experiments in TNG syntax; skeletal emacs-mode
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Experiments in TNG syntax; skeletal emacs-mode
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writeLine ""Hello, World!"" |
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Experiments in TNG syntax; skeletal emacs-mode
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- abstraction: some kind of block syntax |
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(pattern -> expr) |
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(define (parse-results-next results) |
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(let ((next (parse-results-next* results))) |
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(if (procedure? next) |
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(let ((next-value (next))) |
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(set-parse-results-next! results next-value) |
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Experiments in TNG syntax; skeletal emacs-mode
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next-value) |
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Experiments in TNG syntax; skeletal emacs-mode
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next))) |
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Experiments in TNG syntax; skeletal emacs-mode
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" |
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module packrat |
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( |
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let: next be: (atomic: get: next*: results), |
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if: (procedure?: next) |
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then: (let: next-value be: (apply: next), |
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atomic: set: (next*: results) to: next-value, |
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next-value) |
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else: next |
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) |
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[ |
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tvar <- results next*. |
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[ |
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next <- tvar value. |
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next procedure? |
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ifTrue: [next-value <- next apply. |
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tvar value: next-value. |
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next-value] |
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ifFalse: [next] |
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] atomic |
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] |
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[ |
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results next* -> tvar. |
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[ |
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tvar value -> next. |
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next procedure? |
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ifTrue: [next apply -> next-value. |
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tvar value: next-value. |
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next-value] |
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ifFalse: [next] |
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] atomic |
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] |
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Collection do: Block |
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(-> (c, b). |
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1 to: (c size) do: (-> i. b apply: (c at: i)).) |
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-> results. |
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results next* -> tvar. |
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[ |
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tvar value -> next. |
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next procedure? |
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ifTrue: [$next -> next-value. |
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tvar value: next-value. |
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next-value] |
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ifFalse: [next]. |
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] atomic. |
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-> (list @ Pair car: a cdr: d, block @ -> _ . _). |
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Pair car: ($block a) cdr: (d map: block). |
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-> (Nil, block @ -> _ . _). |
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Nil. |
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myList map: (-> e. e + 3) -> result. |
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-> results. |
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next* results -> tvar. |
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atomic [ |
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value tvar -> next. |
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if: procedure? next |
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then: [$next -> next-value. |
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tvar value: next-value. |
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next-value] |
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else: [next]. |
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
119 |
]. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
120 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
121 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
122 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
123 |
bind (-> over: (list @ Pair car: a cdr: d) map: (block @ -> _ . _). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
124 |
Pair car: ($block a) cdr: (over: d map: block)). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
125 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
126 |
bind (-> over: Nil map: (block @ -> _ . _). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
127 |
Nil). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
128 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
129 |
bind (-> succ (i @ Integer). i + 1). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
130 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
131 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
132 |
bind (-> merge: (e1 @ ParseErrors _) with: e2 . e1). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
133 |
bind (-> merge: e1 with: (e2 @ ParseErrors _) . e2). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
134 |
bind (-> merge: (e1 @ ParseErrors pos: p1 \ _) |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
135 |
with: (e2 @ ParseErrors pos: p2 \ _). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
136 |
cond: ( |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
137 |
[[p1 > p2] || [empty? e2]] => [e1], |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
138 |
[[p2 > p1] || [empty? e1]] => [e2] |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
139 |
) else: [ParseErrors pos: p1 |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
140 |
expected: (union (expected e1, expected e2)) |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
141 |
messages: (append (messages e1, messages e2))]). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
142 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
143 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
144 |
|
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
145 |
|
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
146 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
147 |
|
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
148 |
|
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
149 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
150 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
151 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
152 |
bind (-> over: list @ Pair^(car: a cdr: d) |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
153 |
map: block @ (-> _ . _). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
154 |
Pair^ car: ($block a) cdr: (over: d map: block)). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
155 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
156 |
bind (-> over: list @ Nil^_ |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
157 |
map: block @ (-> _ . _). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
158 |
list). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
159 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
160 |
bind (-> succ (i @ Integer^_). i + 1). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
161 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
162 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
163 |
bind (-> merge: (e1 @ ParseErrors^_) with: e2 . e1). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
164 |
bind (-> merge: e1 with: (e2 @ ParseErrors^_) . e2). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
165 |
bind (-> merge: (e1 @ ParseErrors^ pos: p1 \ _) |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
166 |
with: (e2 @ ParseErrors^ pos: p2 \ _). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
167 |
cond: ( |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
168 |
[[p1 > p2] || [empty? e2]] => [e1], |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
169 |
[[p2 > p1] || [empty? e1]] => [e2] |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
170 |
) else: [ParseErrors^ pos: p1 |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
171 |
expected: expected e1 `union` expected e2 |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
172 |
messages: messages e1 `append` messages e2]). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
173 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
174 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
175 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
176 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
177 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
178 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
179 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
180 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
181 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
182 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
183 |
bind (-> over: list @ Pair{car: a cdr: d} |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
184 |
map: block @ (-> _ . _). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
185 |
Pair{car: ($block a) cdr: (over: d map: block)}. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
186 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
187 |
bind (-> over: list @ Nil{} |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
188 |
map: block @ (-> _ . _). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
189 |
list). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
190 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
191 |
bind (-> succ (i @ Integer{}). i + 1). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
192 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
193 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
194 |
bind (-> merge: e1 @ ParseErrors{} with: e2 . e1). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
195 |
bind (-> merge: e1 with: e2 @ ParseErrors{} . e2). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
196 |
bind (-> merge: e1 @ ParseErrors{pos: p1 expected: x1 messages: m1} |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
197 |
with: e2 @ ParseErrors{pos: p2 expected: x2 messages: m2} |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
198 |
. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
199 |
Cond { |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
200 |
[[p1 > p2] || [empty? e2]] => [e1], |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
201 |
[[p2 > p1] || [empty? e1]] => [e2] |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
202 |
} else: [ParseErrors{pos: p1 |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
203 |
expected: x1 `union` x2 |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
204 |
messages: m1 `append` m2}] |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
205 |
). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
206 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
207 |
bind (-> next results @ ParseResults{next: tvar} . |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
208 |
atomic [ |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
209 |
!tvar -> next. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
210 |
if: procedure? next |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
211 |
then: [$next -> next-value. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
212 |
tvar := next-value. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
213 |
next-value] |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
214 |
else: [next]. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
215 |
]. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
216 |
). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
217 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
218 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
219 |
[ |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
220 |
"This is to parse as 'meta (-> m. ...)'." |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
221 |
meta -> m. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
222 |
dict at: key ifAbsent: [m `return` false] -> val. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
223 |
val |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
224 |
] |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
225 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
226 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
227 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
228 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
229 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
230 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
231 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
232 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
233 |
"Now, experiment without the [] syntax for nullary functions" |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
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234 |
|
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|
235 |
bind (-> merge: e1 @ ParseErrors{} with: e2 . e1). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
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236 |
bind (-> merge: e1 with: e2 @ ParseErrors{} . e2). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
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|
237 |
bind (-> merge: e1 @ ParseErrors{pos: p1 expected: x1 messages: m1} |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
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238 |
with: e2 @ ParseErrors{pos: p2 expected: x2 messages: m2} |
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Experiments in TNG syntax; skeletal emacs-mode
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239 |
. |
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Experiments in TNG syntax; skeletal emacs-mode
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240 |
Cond { |
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Experiments in TNG syntax; skeletal emacs-mode
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241 |
(. (. p1 > p2) || (. empty? e2)) => (. e1), |
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Experiments in TNG syntax; skeletal emacs-mode
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242 |
(. (. p2 > p1) || (. empty? e1)) => (. e2) |
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Experiments in TNG syntax; skeletal emacs-mode
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parents:
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|
243 |
} else: (. ParseErrors{pos: p1 |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
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|
244 |
expected: x1 `union` x2 |
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Experiments in TNG syntax; skeletal emacs-mode
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|
245 |
messages: m1 `append` m2}) |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
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|
246 |
). |
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Experiments in TNG syntax; skeletal emacs-mode
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|
247 |
|
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Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
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|
248 |
bind (-> next results @ ParseResults{next: tvar} . |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
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|
249 |
atomic (. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
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|
250 |
!tvar -> next. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
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|
251 |
if: procedure? next |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
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|
252 |
then: (. $next -> next-value. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
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|
253 |
tvar := next-value. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
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|
254 |
next-value) |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
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|
255 |
else: (. next). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
256 |
). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
257 |
). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
258 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
259 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
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changeset
|
260 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
261 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
262 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
263 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
264 |
"Now, reimagine everything as lazy - so each expression is effectively a nullary thunk." |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
265 |
"Note that pattern-matching is what forces promises!" |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
266 |
"We add syntactic sugar for lists here." |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
267 |
"Spineless, tagless G-machine?..." |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
268 |
"Monad? Is the interpreter the monad? How does polymorphic return work?" |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
269 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
270 |
bind (-> merge: e1 @ ParseErrors{} with: e2 . e1). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
271 |
bind (-> merge: e1 with: e2 @ ParseErrors{} . e2). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
272 |
bind (-> merge: e1 @ ParseErrors{pos: p1 expected: x1 messages: m1} |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
273 |
with: e2 @ ParseErrors{pos: p2 expected: x2 messages: m2} |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
274 |
. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
275 |
Cond [ |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
276 |
((p1 > p2) || (empty? e2)) => e1, |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
277 |
((p2 > p1) || (empty? e1)) => e2 |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
278 |
] else: ParseErrors{pos: p1 |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
279 |
expected: x1 `union` x2 |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
280 |
messages: m1 `append` m2} |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
281 |
). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
282 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
283 |
bind (-> next results @ ParseResults{next: tvar} . |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
284 |
atomic ( |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
285 |
!tvar -> next. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
286 |
if: procedure? next |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
287 |
then: ($next () -> next-value. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
288 |
tvar := next-value. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
289 |
next-value) |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
290 |
else: next. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
291 |
). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
292 |
). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
293 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
294 |
( |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
295 |
"This is to parse as 'meta (-> m. ...)'." |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
296 |
meta -> m. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
297 |
dict at: key ifAbsent: [m `return` false] -> val. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
298 |
val |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
299 |
) |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
300 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
301 |
bind (-> over: list @ Pair{car: a cdr: d} |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
302 |
map: block @ (-> _ . _). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
303 |
Pair{car: ($block a) cdr: (over: d map: block)}. |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
304 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
305 |
bind (-> over: list @ Nil{} |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
306 |
map: block @ (-> _ . _). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
307 |
list). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
308 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
309 |
bind (-> succ (i @ Integer{}). i + 1). |
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
310 |
|
7e193a2d4679
Experiments in TNG syntax; skeletal emacs-mode
Tony Garnock-Jones <tonyg@kcbbs.gen.nz>
parents:
diff
changeset
|
311 |
"The pattern (-> p1 . p2) is sugar for Function{pattern: p1 body: p2}" |