Where Does Go's `make` Function Live in the Compiler's Source Code?

Where Can You Find the Implementation of make in Go's Source Code?

Go's make function, while a central language feature, doesn't have a readily accessible source code location. However, delving into the compiler's inner workings reveals where it resides.

Internal Symbol Transformation

Instead of a dedicated make() function, Go undergoes internal symbol transformations that translate make calls into other symbols, ultimately leading to runtime calls in the pkg/runtime package.

Symbol Substitution and Code Generation

Specifically, the process flow for make() is as follows:

1. Go code: make(chan int)
2. Symbol substitution: OMAKE
3. Symbol typechecking: OMAKECHAN
4. Code generation: runtime·makechan

Path to Discovery

To embark on your own exploration, consider the following steps:

• Identify the compiler stage: Determine which stage (e.g., parsing, type checking, code generation) is most likely to handle the feature.
• Search the compiler stages: Inspect the source code of the relevant stages (e.g., cmd/compile/internal/gc/) and search for the symbols you expect to find (e.g., OMAKE, OMAKECHAN).
• Trace the symbol flow: Follow the symbol transformations through the compiler code to witness the substitutions and ultimate runtime call.

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