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Better error messages for invalid operands in numeric 'for'

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"Better" and similar to error messages for invalid function arguments.
  *old message: 'for' limit must be a number
  *new message: bad 'for' limit (number expected, got table)
This commit is contained in:
Roberto Ierusalimschy
2018-10-30 15:46:56 -03:00
parent 2316ec4c24
commit e073cbc2e5
4 changed files with 22 additions and 4 deletions
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10
testes/errors.lua
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@@ -154,6 +154,16 @@ checkmessage("a = 24 // 0", "divide by zero")
checkmessage("a = 1 % 0", "'n%0'")
-- numeric for loops
checkmessage("for i = {}, 10 do end", "table")
checkmessage("for i = io.stdin, 10 do end", "FILE")
checkmessage("for i = {}, 10 do end", "initial value")
checkmessage("for i = 1, 'x', 10 do end", "string")
checkmessage("for i = 1, {}, 10 do end", "limit")
checkmessage("for i = 1, {} do end", "limit")
checkmessage("for i = 1, 10, print do end", "step")
checkmessage("for i = 1, 10, print do end", "function")
-- passing light userdata instead of full userdata
_G.D = debug
checkmessage([[