编译选项编译指示

此处列出的编译指示可用于覆盖proc/method/converter的代码生成选项。

该实现目前提供以下可能的选项（稍后可以添加各种其他选项）。

pragma	allowed values	description
checks	on\|off	Turns the code generation for all runtime checks on or off.
boundChecks	on\|off	Turns the code generation for array bound checks on or off.
overflowChecks	on\|off	Turns the code generation for over- or underflow checks on or off.
nilChecks	on\|off	Turns the code generation for nil pointer checks on or off.
assertions	on\|off	Turns the code generation for assertions on or off.
warnings	on\|off	Turns the warning messages of the compiler on or off.
hints	on\|off	Turns the hint messages of the compiler on or off.
optimization	none\|speed\|size	Optimize the code for speed or size, or disable optimization.
patterns	on\|off	Turns the term rewriting templates/macros on or off.
callconv	cdecl\|…	Specifies the default calling convention for all procedures (and procedure types) that follow.

示例：

{.checks: off, optimization: speed.}
# 编译时没有运行时检查并优化速度