79 lines
3.4 KiB
Text
79 lines
3.4 KiB
Text
/-
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Copyright (c) 2021 Mac Malone. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Authors: Mac Malone
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-/
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import Lake.Config.Package
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import Lake.DSL.Attributes
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import Lake.DSL.DeclUtil
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namespace Lake.DSL
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open Lean Parser Command
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syntax packageDeclWithBinders :=
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(ppSpace "(" Term.simpleBinder ")")? -- dir
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(ppSpace "(" Term.simpleBinder ")")? -- args
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(declValSimple <|> declValStruct <|> declValDo)
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syntax packageDeclSpec :=
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ident (Command.whereStructInst <|> declValTyped <|> packageDeclWithBinders)?
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def expandPackageBinders
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: (dir? : Option Syntax) → (args? : Option Syntax) → MacroM (Bool × Syntax × Syntax)
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| none, none => do let hole ← `(_); return (false, hole, hole)
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| some dir, none => return (true, dir, ← `(_))
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| none, some args => return (true, ← `(_), args)
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| some dir, some args => return (true, dir, args)
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def mkSimplePackageDecl
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(doc? : Option Syntax) (attrs : Array Syntax) (id : Syntax) (defn : Syntax)
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(dir? : Option Syntax) (args? : Option Syntax) (wds? : Option Syntax) : MacroM Syntax := do
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let (hasBinders, dir, args) ← expandPackageBinders dir? args?
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if hasBinders then
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`($[$doc?:docComment]? @[$attrs,*] def $id : Packager :=
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(fun $dir $args => $defn) $[$wds?]?)
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else
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`($[$doc?:docComment]? @[$attrs,*] def $id : PackageConfig := $defn $[$wds?]?)
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/-- The name given to the definition created by the `package` syntax. -/
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def packageDeclName := `_package
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def mkPackageDecl (doc? : Option Syntax) (attrs : Array Syntax) : Macro
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| `(packageDeclSpec| $id:ident) =>
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`($[$doc?:docComment]? @[$attrs,*] def $(mkIdentFrom id packageDeclName) : PackageConfig :=
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{name := $(quote id.getId)})
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| `(packageDeclSpec| $id:ident where $ds;* $[$wds?]?) =>
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`($[$doc?:docComment]? @[$attrs,*] def $(mkIdentFrom id packageDeclName) : PackageConfig where
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name := $(quote id.getId); $ds;* $[$wds?]?)
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| `(packageDeclSpec| $id:ident : $ty := $defn $[$wds?]?) =>
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`($[$doc?:docComment]? @[$attrs,*] def $(mkIdentFrom id packageDeclName) : $ty := $defn $[$wds?]?)
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| `(packageDeclSpec| $id:ident $[($dir?)]? $[($args?)]? := $defn $[$wds?]?) =>
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mkSimplePackageDecl doc? attrs (mkIdentFrom id packageDeclName) defn dir? args? wds?
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| `(packageDeclSpec| $id:ident $[($dir?)]? $[($args?)]? { $[$fs $[,]?]* } $[$wds?]?) => do
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let defn ← `({ name := $(quote id.getId), $fs,* })
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mkSimplePackageDecl doc? attrs (mkIdentFrom id packageDeclName) defn dir? args? wds?
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| `(packageDeclSpec| $id:ident $[($dir?)]? $[($args?)]? do $seq $[$wds?]?) => do
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let (_, dir, args) ← expandPackageBinders dir? args?
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`($[$doc?:docComment]? @[$attrs,*] def $(mkIdentFrom id packageDeclName) : IOPackager :=
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(fun $dir $args => do $seq) $[$wds?]?)
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| stx => Macro.throwErrorAt stx "ill-formed package declaration"
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/--
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Command that declares the configuration of a Lake package. Has many forms:
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```lean
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package «pkg-name»
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package «pkg-name» { /- config opts -/ }
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package «pkg-name» where /- config opts -/
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package «pkg-name» : PackageConfig := /- config -/
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```
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There can only be one package configuration per lakefile.
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The defined package configuration will be available for reference as `_package`.
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-/
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scoped macro (name := packageDecl)
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doc?:optional(docComment) attrs?:optional(Term.attributes)
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"package " spec:packageDeclSpec : command => do
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let attr ← `(Term.attrInstance| «package»)
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let attrs := #[attr] ++ expandAttrs attrs?
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mkPackageDecl doc? attrs spec
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