Tokenizer

Token = (tag, pos)

• State machine
• Token-by-token, not stored in memory

Parser

AST Node = (tag, main_token, data)

tag = type of node main_token = index in token data = (lhs, rhs)

Example:

func decl, has:

• func name
• param list
• return type
• body, etc.

lhs == function prototype node rhs == function body

lhs, rhs points to either nodes or extradata in the parser

extradata == array of Index how many fields = defined by tag

for prototype it's 6 fields, defined as a struct: (start/end of params, alignexpr, addrspaceexpr, sectionexpr, callconvexpr)

Backend

1. main.zig
   1. buildOutputType
   2. Compilation object created
2. ZIR is first generated

Compiler.zig

binfile: link.File

--watch command

Sources:

1. Entry
2. Update
   1. comp.makeBinFileWritable
   2. updateModule
      1. comp.update