e9d85f49e6
Based on the discussion at https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/for.2C.20unexpected.20need.20for.20type.20ascription/near/269083574 The consensus seemed to be that "auto pure" is more confusing than its worth.
91 lines
2.8 KiB
Text
91 lines
2.8 KiB
Text
structure ParamType where
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/-- Name of the type, used when displaying the help. -/
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name : String
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/-- Function to check whether a value conforms to the type. -/
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isValid : String → Bool
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structure Flag where
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/-- Designates `x` in `-x`. -/
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shortName? : Option String := none
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/-- Designates `x` in `--x`. -/
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longName : String
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/-- Description that is displayed in the help. -/
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description : String
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/--
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Type according to which the parameter is validated.
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`Unit` is used to designate flags without a parameter.
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-/
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type : ParamType
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structure InputFlag where
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/-- Flag name input by the user. -/
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name : String
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/-- Whether the flag input by the user was a short one. -/
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isShort : Bool
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instance : ToString InputFlag where
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toString f :=
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let pre := if f.isShort then "-" else "--"
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s!"{pre}{f.name}"
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structure Arg where
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/- Name that is displayed in the help. -/
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name : String
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/- Description that is displayed in the help. -/
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description : String
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/- Description that is displayed in the help. -/
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type : ParamType
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-- (deterministic) timeout at 'whnf', maximum number of heartbeats (50000) has been reached (use 'set_option maxHeartbeats <num>' to set the limit)
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inductive Kind
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| unknownFlag
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(inputFlag : InputFlag)
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(msg : String :=
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s!"Unknown flag `{inputFlag}`.")
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| missingFlagArg
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(flag : Flag)
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(inputFlag : InputFlag)
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(msg : String :=
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s!"Missing argument for flag `{inputFlag}`.")
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| duplicateFlag
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(flag : Flag)
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(inputFlag : InputFlag)
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(msg : String :=
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let complementaryName? : Option String := OptionM.run do
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if inputFlag.isShort then
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pure s!" (`--{flag.longName}`)"
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else
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pure s!" (`-{← flag.shortName?}`)"
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s!"Duplicate flag `{inputFlag}`.")
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| redundantFlagArg
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(flag : Flag)
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(inputFlag : InputFlag)
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(inputValue : String)
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(msg : String :=
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s!"Redundant argument `{inputValue}` for flag `{inputFlag}` that takes no arguments.")
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| invalidFlagType
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(flag : Flag)
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(inputFlag : InputFlag)
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(inputValue : String)
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(msg : String :=
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s!"Invalid type of argument `{inputValue}` for flag `{inputFlag} : {flag.type.name}`.")
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| missingPositionalArg
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(arg : Arg)
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(msg : String :=
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s!"Missing positional argument `<{arg.name}>.`")
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| invalidPositionalArgType
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(arg : Arg)
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(inputArg : String)
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(msg : String :=
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s!"Invalid type of argument `{inputArg}` for positional argument `<{arg.name} : {arg.type.name}>`.")
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| redundantPositionalArg
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(inputArg : String)
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(msg : String :=
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s!"Redundant positional argument `{inputArg}`.")
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| invalidVariableArgType
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(arg : Arg)
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(inputArg : String)
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(msg : String :=
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s!"Invalid type of argument `{inputArg}` for variable argument `<{arg.name} : {arg.type.name}>...`.")
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#check @Kind.missingFlagArg.inj
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