github.com/tetratelabs/wazero@v1.7.3-0.20240513003603-48f702e154b5/examples/import-go/testdata/age_calculator.wat (about)

     1  (module $age-calculator
     2  
     3    ;; In WebAssembly, you don't import an entire module, rather each function.
     4    ;; This imports the functions and gives them names which are easier to read
     5    ;; than the alternative (zero-based index).
     6    ;;
     7    ;; Note: Importing unused functions is not an error in WebAssembly.
     8    (import "env" "log_i32" (func $log (param i32)))
     9    (import "env" "current_year" (func $year (result i32)))
    10  
    11    ;; get_age looks up the current year and subtracts the input from it.
    12    (func $get_age (export "get_age") (param $year_born i32) (result i32)
    13      call $year            ;; stack: [$year.result]
    14      local.get $year_born  ;; stack: [$year.result, $year_born]
    15      i32.sub               ;; stack: [$year.result-$year_born]
    16    )
    17  
    18    ;; log_age calls $log with the result of $get_age
    19    (func (export "log_age") (param $year_born i32)
    20  	                       ;; stack: []
    21      local.get $year_born   ;; stack: [$year_born]
    22      call $get_age          ;; stack: [$get_age.result]
    23      call $log              ;; stack: []
    24    )
    25  )