Go 语言规范Blocks
A block is a possibly empty sequence of declarations and statements within matching brace brackets.
Block = "{" StatementList "}" .
StatementList = { Statement ";" } .In addition to explicit blocks in the source code, there are implicit blocks:
- The universe block encompasses all Go source text.
- Each package has a package block containing all Go source text for that package.
- Each file has a file block containing all Go source text in that file.
- Each "if", "for", and "switch" statement is considered to be in its own implicit block.
- Each clause in a "switch" or "select" statement acts as an implicit block.
Blocks nest and influence scoping.
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