2231d9b488
This PR changes the way that scientific numerals are parsed in order to give better error messages for (invalid) syntax like `32.succ`. Example: ```lean4 #check 32.succ ``` Before, the error message is: ``` unexpected identifier; expected command ``` This is because `32.` parses as a complete float, and `#check 32.` parses as a complete command, so `succ` is being read as the start of a new command. With this change, the error message will move from the `succ` token to the `32` token (which isn't totally ideal from my perspective) but gives a less misleading error message and corresponding suggestion: ``` unexpected identifier after decimal point; consider parenthesizing the number ```
43 lines
2.1 KiB
Text
43 lines
2.1 KiB
Text
2
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31. : Float
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31.0 : Float
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31.000000
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31.000000
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10488.lean:8:10: error: missing exponent digits in scientific literal
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10488.lean:9:10: error: missing exponent digits in scientific literal
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10488.lean:11:7: error: unexpected identifier after decimal point; consider parenthesizing the number
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10488.lean:12:7: error: unexpected identifier after decimal point; consider parenthesizing the number
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10488.lean:14:11: error: missing exponent digits in scientific literal
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313e1 : Float
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10488.lean:16:11: error: missing exponent digits in scientific literal
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31.3 : Float
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10488.lean:18:11-18:12: error: unexpected identifier; expected command
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31.3 : Float
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10488.lean:19:11-19:13: error: unexpected identifier; expected command
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31.3 : Float
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10488.lean:20:11-20:14: error: unexpected identifier; expected command
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10488.lean:22:7: error: unexpected identifier after decimal point; consider parenthesizing the number
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Nat.toDigits 11 13 : List Char
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['1', '2']
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Nat.toDigits 11 : Nat → List Char
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10488.lean:25:20-25:21: error: unexpected token '('; expected command
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Nat.toDigits 11 13 : List Char
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foo.{u_1, u_2} {A : Sort u_1} {B : Sort u_2} : A → B → Unit
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10488.lean:30:11: error: unexpected identifier after decimal point; consider parenthesizing the number
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foo (Nat.succ 31) : ?m → Unit
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foo 31 : ?m → Unit
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10488.lean:32:13-32:14: error: unexpected token '('; expected command
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foo 31 : ?m → Unit
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10488.lean:33:15-33:16: error: unexpected token '('; expected command
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10488.lean:34:14-34:19: error(lean.invalidDottedIdent): Invalid dotted identifier notation: The expected type of `.succ` could not be determined
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foo 31 sorry : Unit
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foo 31. succ : Unit
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11 : Nat
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10488.lean:37:9-37:13: error: unexpected identifier; expected command
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10488.lean:38:7: error: unexpected identifier after decimal point; consider parenthesizing the number
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11.12 : Float
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10488.lean:39:12-39:16: error: unexpected identifier; expected command
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10488.lean:40:8: error: unexpected identifier after decimal point; consider parenthesizing the number
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10488.lean:41:13-41:17: error: unexpected identifier; expected ')', ',' or ':'
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bar.x.snd.snd : Nat
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{ x := (2, 4, 1) }
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