Handle function calls to integers in model lexer correctly #20330
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r? @pcwalton (rust_highfive has picked a reviewer for you, use r? to override) |
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I've added 2 additional commits. I could submit another pull request for these changes, if that's easier to review/accept? |
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r? @cmr |
alexcrichton
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Dec 31, 2014
This patch resolves the second problem mentioned in rust-lang#15877: function calls to integers, e.g. `3.b()`. It does so, by checking whether the character following the first dot of a FLOAT_LIT is a character or an underscore (these should denote a valid identifier). This does not look like a particularly, but it seems like a lookahead of 1 is needed for this distinction. Another interesting aspect are ranges that start with a integer constant, but end with a function call, e.g. `1..b()`. Rust treats this as a range from 1 to `b()`, but given that `1.` is a valid FLOAT_LIT, `1..b()` could be a function call to a float as well. cc @cmr
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This patch resolves the second problem mentioned in #15877: function calls to integers, e.g.
3.b().It does so, by checking whether the character following the first dot of a FLOAT_LIT is a character or an underscore (these should denote a valid identifier). This does not look like a particularly, but it seems like a lookahead of 1 is needed for this distinction.
Another interesting aspect are ranges that start with a integer constant, but end with a function call, e.g.
1..b(). Rust treats this as a range from 1 tob(), but given that1.is a valid FLOAT_LIT,1..b()could be a function call to a float as well.cc @cmr