32 lines
942 B
Plaintext
32 lines
942 B
Plaintext
module javascript
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imports libstrategolib signatures/-
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signature
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constructors
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TopLevel: Ex -> Ex
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rules
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js: TopLevel(x) -> $[const Stdio = {
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receives: v => { process.stdout.write(String(v)); return Stdio; }
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}
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[<js>x]]
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js: Stdio() -> $[Stdio]
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js: Int(x) -> x
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js: Sum(x) -> $[[<js>x].reduce((v,w) => v+w)]
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js: Receives(x, y) -> $[[<js>x].receives([<js>y])]
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js: [] -> $<[]>
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js: [x | xs] -> $<[<<js>x><<jstail>xs>]>
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strategies
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// wrap expression in a toplevel and then apply code generation
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javascript = !TopLevel(<id>); js
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// translate each element of a list, prepending each with ',', and concatenate
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jstail = foldr(!"", \ (x,y) -> $<, <<js>x><y>> \)
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// Interface javascript code generation with editor services and file system
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to-javascript: (selected, _, _, path, project-path) -> (filename, result)
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with filename := <guarantee-extension(|"js")> path
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; result := <javascript> selected
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