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44 lines
2.6 KiB
Scheme
44 lines
2.6 KiB
Scheme
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; This roughly follows the description at: https://github.com/ds26gte/scmindent#how-subforms-are-indented
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; Exclude literals in the first patterns, since different rules apply for them.
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; Similarly, exclude certain keywords (detected by a regular expression).
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; If a list has 2 elements on the first line, it is aligned to the second element.
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(list . (_) @first . (_) @anchor
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(#same-line? @first @anchor)
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(#set! "scope" "tail")
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(#not-kind-eq? @first "boolean") (#not-kind-eq? @first "character") (#not-kind-eq? @first "string") (#not-kind-eq? @first "number")
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(#not-match? @first "def.*|let.*|set!")) @align
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; If the first element in a list is also a list and on a line by itself, the outer list is aligned to it
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(list . (list) @anchor .
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(#set! "scope" "tail")
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(#not-kind-eq? @first "boolean") (#not-kind-eq? @first "character") (#not-kind-eq? @first "string") (#not-kind-eq? @first "number")) @align
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(list . (list) @anchor . (_) @second
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(#not-same-line? @anchor @second)
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(#set! "scope" "tail")
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(#not-kind-eq? @first "boolean") (#not-kind-eq? @first "character") (#not-kind-eq? @first "string") (#not-kind-eq? @first "number")
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(#not-match? @first "def.*|let.*|set!")) @align
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; If the first element in a list is not a list and on a line by itself, the outer list is aligned to
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; it plus 1 additional space. This cannot currently be modelled exactly by our indent queries,
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; but the following is equivalent, assuming that:
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; - the indent width is 2 (the default for scheme)
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; - There is no space between the opening parenthesis of the list and the first element
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(list . (_) @first .
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(#not-kind-eq? @first "boolean") (#not-kind-eq? @first "character") (#not-kind-eq? @first "string") (#not-kind-eq? @first "number")
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(#not-match? @first "def.*|let.*|set!")) @indent
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(list . (_) @first . (_) @second
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(#not-same-line? @first @second)
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(#not-kind-eq? @first "boolean") (#not-kind-eq? @first "character") (#not-kind-eq? @first "string") (#not-kind-eq? @first "number")
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(#not-match? @first "def.*|let.*|set!")) @indent
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; If the first element in a list is a literal, align the list to it
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(list . [(boolean) (character) (string) (number)] @anchor
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(#set! "scope" "tail")) @align
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; If the first element is among a set of predefined keywords, align the list to this element
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; plus 1 space (using the same workaround as above for now). This is a simplification since actually
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; the second line of the list should be indented by 2 spaces more in some cases. Supporting this would
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; be possible but require significantly more patterns.
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(list . (symbol) @first
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(#match? @first "def.*|let.*|set!")) @indent
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