79 lines
2.5 KiB
Scheme
79 lines
2.5 KiB
Scheme
#lang scheme/base
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(require syntax/parse
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"unit-compiletime.ss"
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"unit-keywords.ss"
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(for-template "unit-keywords.ss"))
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(provide import-clause/contract export-clause/contract dep-clause
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import-clause/c export-clause/c)
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(define-syntax-class sig-id
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#:attributes ()
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(pattern x
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#:declare x (static (λ (x)
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(signature? (set!-trans-extract x)))
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'signature)))
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(define-syntax-class sig-spec #:literals (prefix rename only except)
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#:attributes ((name 0))
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#:transparent
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(pattern name:sig-id)
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(pattern (prefix i:identifier s:sig-spec)
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#:with name #'s.name)
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(pattern (rename s:sig-spec [int:identifier ext:identifier] ...)
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#:with name #'s.name)
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(pattern (only s:sig-spec i:identifier ...)
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#:with name #'s.name)
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(pattern (except s:sig-spec i:identifier ...)
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#:with name #'s.name))
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(define-syntax-class tagged-sig-spec #:literals (tag)
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#:auto-nested-attributes
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#:transparent
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(pattern s:sig-spec
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#:with i #f)
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(pattern (tag i:identifier s:sig-spec)))
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(define-syntax-class tagged-sig-id #:literals (tag)
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#:attributes ()
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#:transparent
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(pattern s:sig-id)
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(pattern (tag i:identifier s:sig-id)))
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(define-syntax-class unit/c-clause
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#:auto-nested-attributes
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#:transparent
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(pattern (s:tagged-sig-id [x:identifier c:expr] ...))
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(pattern s:tagged-sig-id ;; allow a non-wrapped sig, which is the same as (sig)
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#:with (x ...) null
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#:with (c ...) null))
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(define-syntax-class import-clause/c #:literals (import)
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#:auto-nested-attributes
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#:transparent
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(pattern (import i:unit/c-clause ...)))
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(define-syntax-class export-clause/c #:literals (export)
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#:auto-nested-attributes
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#:transparent
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(pattern (export e:unit/c-clause ...)))
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(define-syntax-class unit/contract-clause
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#:auto-nested-attributes
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#:transparent
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(pattern (s:tagged-sig-spec [x:identifier c:expr] ...))
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(pattern s:tagged-sig-spec ;; allow a non-wrapped sig, which is the same as (sig)
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#:with (x ...) null
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#:with (c ...) null))
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(define-syntax-class import-clause/contract #:literals (import)
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#:auto-nested-attributes
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#:transparent
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(pattern (import i:unit/contract-clause ...)))
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(define-syntax-class export-clause/contract #:literals (export)
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#:auto-nested-attributes
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#:transparent
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(pattern (export e:unit/contract-clause ...)))
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(define-syntax-class dep-clause #:literals (init-depend)
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#:auto-nested-attributes
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#:transparent
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(pattern (init-depend s:tagged-sig-id ...)))
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