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go_spec.html: document const type propagation

R=ken
OCL=26223
CL=26225
This commit is contained in:
Russ Cox 2009-03-12 19:04:56 -07:00
parent 8f194bf5ff
commit f8ba0f4511
1 changed files with 2 additions and 3 deletions
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doc/go_spec.html
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@ -1441,7 +1441,7 @@ right.
<pre class="grammar">
ConstDecl = "const" ( ConstSpec | "(" [ ConstSpecList ] ")" ) .
ConstSpecList = ConstSpec { ";" ConstSpec } [ ";" ] .
ConstSpec = IdentifierList [ CompleteType ] [ "=" ExpressionList ] .
ConstSpec = IdentifierList [ [ CompleteType ] "=" ExpressionList ] .
IdentifierList = identifier { "," identifier } .
ExpressionList = Expression { "," Expression } .
@ -1473,8 +1473,7 @@ const u, v float = 0, 3 // u = 0.0, v = 3.0
Within a parenthesized <code>const</code> declaration list the
expression list may be omitted from any but the first declaration.
Such an empty list is equivalent to the textual substitution of the
first preceding non-empty expression list.
(TODO: Substitute type from that declaration too?)
first preceding non-empty expression list, and its type if any.
Omitting the list of expressions is therefore equivalent to
repeating the previous list. The number of identifiers must be equal
to the number of expressions in the previous list.