The Go compiler turns fast feedback and early error detection into everyday engineering tools. Its package and type-system constraints reduce build work while rejecting many defects before deployment. section 1.2 section 1.2.1
Go keeps compilation efficient through several structural rules:
- Rejects circular imports, keeping the dependency graph directed and processable. section 1.2
- Requires every declared import to be used, avoiding processing for unused dependencies. section 1.2 section 1.2.1
- Uses selective type inference, combining concise declarations with static type guarantees. section 1.2
- Rejects incompatible assignments as build errors rather than runtime surprises. section 1.2.2
Compile-time type checking
Assigning a string variable to an integer variable stops the program from building: `number = str` produces an error instead of failing during execution. section 1.2.2
The compiler does not specially reject every invalid floating-point result. Overflow, division by zero, and invalid operations can produce +Inf, -Inf, or NaN; use math.IsInf and math.IsNaN to check them. section 3.2.1
