TOML: keys starting with digits are not recognized properly

[jaskij]

Name of the lexer TOML

Code sample

aaa = "a:100"
100 = "a:100"
1a = "a:100"

Code sample on rouge.jneen.net.

Additional context

In the above snippet all three lines have valid keys, but only the first one is recognized properly.

From TOML specification (emphasis mine):

Bare keys may only contain ASCII letters, ASCII digits, underscores, and dashes (A-Za-z0-9_-). Note that bare keys are allowed to be composed of only ASCII digits, e.g. 1234, but are always interpreted as strings.

Note that this is handled properly by the INI lexer.

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[tancnle]

Looking into it.