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fostr/syntax/fostr.sdf3

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init: SDF3/Statix project as initialized by Spoofax
2021-01-30 20:27:10 +00:00
module fostr
imports
Common
context-free start-symbols
feat: Allow indented continuation lines Resolves #2.
2021-02-01 08:29:00 +00:00
Start
init: SDF3/Statix project as initialized by Spoofax
2021-01-30 20:27:10 +00:00
feat: Add syntax for string literals Also rudimentary code generation. The difficulty is that for Haskell generation, we need to know whether an expression is a string or in to send it to standard output. So we will need to begin implementation of a type system for fostr.
2021-02-11 18:02:43 +00:00
lexical sorts
STRING_LITERAL
lexical syntax
feat: Type-dependent Haskell code generation Caveat: type is still not being assigned for the Sequence() constructor. Also fixes the parsing of literal strings (whitespace just after the opening quote was being ignored, and was ambiguous just before the opening quote).
2021-02-16 17:46:12 +00:00
STRING_LITERAL = "'"~[\']*"'"
feat: Add syntax for string literals Also rudimentary code generation. The difficulty is that for Haskell generation, we need to know whether an expression is a string or in to send it to standard output. So we will need to begin implementation of a type system for fostr.
2021-02-11 18:02:43 +00:00
init: SDF3/Statix project as initialized by Spoofax
2021-01-30 20:27:10 +00:00
context-free sorts
feat: Allow expressions to be terminated/sequenced by ; Note that ultimately a terminated sequence may have a slightly different semantics (applying streams to `_|_`, most likely) but for now they don't.
2021-02-10 20:47:34 +00:00
Start LineSeq Line OptTermEx TermExLst TermEx Ex
init: SDF3/Statix project as initialized by Spoofax
2021-01-30 20:27:10 +00:00
context-free syntax
feat: sequencing of expressions with newline to same indent (#11) feat: sequencing of expressions with newline to same indent Also revised README to reflect greater emphasis on streams. Haskell code generation unsurprisingly required a fairly significant rework. Resolves #3. Co-authored-by: Glen Whitney <glen@studioinfinity.org> Reviewed-on: https://code.studioinfinity.org/glen/fostr/pulls/11 Co-Authored-By: Glen Whitney <glen@nobody@nowhere.net> Co-Committed-By: Glen Whitney <glen@nobody@nowhere.net>
2021-02-06 05:11:41 +00:00
Start.TopLevel = LineSeq
feat: Allow expressions to be terminated/sequenced by ; Note that ultimately a terminated sequence may have a slightly different semantics (applying streams to `_|_`, most likely) but for now they don't.
2021-02-10 20:47:34 +00:00
LineSeq = Line
LineSeq.Sequence = sq:Line+ {layout(align-list sq)}
feat: sequencing of expressions with newline to same indent (#11) feat: sequencing of expressions with newline to same indent Also revised README to reflect greater emphasis on streams. Haskell code generation unsurprisingly required a fairly significant rework. Resolves #3. Co-authored-by: Glen Whitney <glen@studioinfinity.org> Reviewed-on: https://code.studioinfinity.org/glen/fostr/pulls/11 Co-Authored-By: Glen Whitney <glen@nobody@nowhere.net> Co-Committed-By: Glen Whitney <glen@nobody@nowhere.net>
2021-02-06 05:11:41 +00:00
feat: Allow expressions to be terminated/sequenced by ; Note that ultimately a terminated sequence may have a slightly different semantics (applying streams to `_|_`, most likely) but for now they don't.
2021-02-10 20:47:34 +00:00
Line = OptTermEx
Line.ISequence = TermExLst OptTermEx {layout(0.first.line == 1.first.line)}
TermExLst.Prior = TermEx+
OptTermEx = ex:Ex {layout(offside ex)}
OptTermEx = te:TermEx {layout(offside te)}
TermEx.Terminate = <<Ex>;>
feat: Allow indented continuation lines Resolves #2.
2021-02-01 08:29:00 +00:00
feat: Add syntax for string literals Also rudimentary code generation. The difficulty is that for Haskell generation, we need to know whether an expression is a string or in to send it to standard output. So we will need to begin implementation of a type system for fostr.
2021-02-11 18:02:43 +00:00
Ex.Int = INT
feat: Type-dependent Haskell code generation Caveat: type is still not being assigned for the Sequence() constructor. Also fixes the parsing of literal strings (whitespace just after the opening quote was being ignored, and was ambiguous just before the opening quote).
2021-02-16 17:46:12 +00:00
Ex.LitString = STRING_LITERAL
feat: Add syntax for string literals Also rudimentary code generation. The difficulty is that for Haskell generation, we need to know whether an expression is a string or in to send it to standard output. So we will need to begin implementation of a type system for fostr.
2021-02-11 18:02:43 +00:00
Ex.Stream = <stream>
Ex.Sum = <<Ex> + <Ex>> {left}
Ex.Gets = [[Ex] << [Ex]] {left}
Ex.To = [[Ex] >> [Ex]] {left}
feat: sequencing of expressions with newline to same indent (#11) feat: sequencing of expressions with newline to same indent Also revised README to reflect greater emphasis on streams. Haskell code generation unsurprisingly required a fairly significant rework. Resolves #3. Co-authored-by: Glen Whitney <glen@studioinfinity.org> Reviewed-on: https://code.studioinfinity.org/glen/fostr/pulls/11 Co-Authored-By: Glen Whitney <glen@nobody@nowhere.net> Co-Committed-By: Glen Whitney <glen@nobody@nowhere.net>
2021-02-06 05:11:41 +00:00
feat: Add syntax for string literals Also rudimentary code generation. The difficulty is that for Haskell generation, we need to know whether an expression is a string or in to send it to standard output. So we will need to begin implementation of a type system for fostr.
2021-02-11 18:02:43 +00:00
Ex = <(<Ex>)> {bracket}
chore: Switch to this repository from predecessor
2021-01-30 23:37:53 +00:00
context-free priorities
feat: sequencing of expressions with newline to same indent (#11) feat: sequencing of expressions with newline to same indent Also revised README to reflect greater emphasis on streams. Haskell code generation unsurprisingly required a fairly significant rework. Resolves #3. Co-authored-by: Glen Whitney <glen@studioinfinity.org> Reviewed-on: https://code.studioinfinity.org/glen/fostr/pulls/11 Co-Authored-By: Glen Whitney <glen@nobody@nowhere.net> Co-Committed-By: Glen Whitney <glen@nobody@nowhere.net>
2021-02-06 05:11:41 +00:00
Ex.To
feat: Implement enters operator >> (#8) Also adds parenthesization of fostr expressions. Recasts code generation in terms of bottomup processing of a local strategy. Resolves #1. Co-authored-by: Glen Whitney <glen@studioinfinity.org> Reviewed-on: https://code.studioinfinity.org/glen/fostr/pulls/8 Co-Authored-By: Glen Whitney <glen@nobody@nowhere.net> Co-Committed-By: Glen Whitney <glen@nobody@nowhere.net>
2021-02-01 01:46:31 +00:00
> Ex.Sum
feat: sequencing of expressions with newline to same indent (#11) feat: sequencing of expressions with newline to same indent Also revised README to reflect greater emphasis on streams. Haskell code generation unsurprisingly required a fairly significant rework. Resolves #3. Co-authored-by: Glen Whitney <glen@studioinfinity.org> Reviewed-on: https://code.studioinfinity.org/glen/fostr/pulls/11 Co-Authored-By: Glen Whitney <glen@nobody@nowhere.net> Co-Committed-By: Glen Whitney <glen@nobody@nowhere.net>
2021-02-06 05:11:41 +00:00
> Ex.Gets,
chore: Switch to this repository from predecessor
2021-01-30 23:37:53 +00:00
// prevent cycle: no singletons
feat: Allow expressions to be terminated/sequenced by ; Note that ultimately a terminated sequence may have a slightly different semantics (applying streams to `_|_`, most likely) but for now they don't.
2021-02-10 20:47:34 +00:00
LineSeq.Sequence <0> .> Line+ = Line
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