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Tokens

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Corey Farwell 2017-02-20 23:10:49 -05:00 committed by Steve Klabnik
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src/doc/reference/src/tokens.md
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@ -2,9 +2,11 @@
Tokens are primitive productions in the grammar defined by regular
(non-recursive) languages. "Simple" tokens are given in [string table
production](#string-table-productions) form, and occur in the rest of the
production] form, and occur in the rest of the
grammar as double-quoted strings. Other tokens have exact rules given.
[string table production]: string-table-productions.html
## Literals
A literal is an expression consisting of a single token, rather than a sequence
@ -254,9 +256,11 @@ Examples of integer literals of various forms:
```
Note that the Rust syntax considers `-1i8` as an application of the [unary minus
operator](#unary-operator-expressions) to an integer literal `1i8`, rather than
operator] to an integer literal `1i8`, rather than
a single integer literal.
[unary minus operator]: expressions.html#unary-operator-expressions
#### Floating-point literals
A _floating-point literal_ has one of two forms:
@ -298,7 +302,9 @@ syntax with a floating point literal ending in a period. `2.f64` would attempt
to call a method named `f64` on `2`.
The representation semantics of floating-point numbers are described in
["Machine Types"](#machine-types).
["Machine Types"].
["Machine Types"]: types.html#machine-types
### Boolean literals
@ -306,11 +312,15 @@ The two values of the boolean type are written `true` and `false`.
## Symbols
Symbols are a general class of printable [tokens](#tokens) that play structural
Symbols are a general class of printable [tokens] that play structural
roles in a variety of grammar productions. They are a
set of remaining miscellaneous printable tokens that do not
otherwise appear as [unary operators](#unary-operator-expressions), [binary
operators](#binary-operator-expressions), or [keywords][keywords].
otherwise appear as [unary operators], [binary
operators], or [keywords].
They are catalogued in [the Symbols section][symbols] of the Grammar document.
[symbols]: grammar.html#symbols
[unary operators]: expressions.html#unary-operator-expressions
[binary operators]: expressions.html#binary-operator-expressions
[tokens]: #tokens
[symbols]: ../grammar.html#symbols
[keywords]: ../grammar.html#keywords