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package main
import (
"fmt"
"strings"
. "github.com/dave/jennifer/jen"
)
//go:generate sh -c "go run . > ../zz_generated.go"
var toFuncs = []struct {
name string
returnType *Statement
}{
{"ToBool", Bool()},
{"ToString", String()},
{"ToTime", Qual("time", "Time")},
{"ToTimeInDefaultLocation", Qual("time", "Time")},
{"ToDuration", Qual("time", "Duration")},
{"ToInt", Int()},
{"ToInt8", Int8()},
{"ToInt16", Int16()},
{"ToInt32", Int32()},
{"ToInt64", Int64()},
{"ToUint", Uint()},
{"ToUint8", Uint8()},
{"ToUint16", Uint16()},
{"ToUint32", Uint32()},
{"ToUint64", Uint64()},
{"ToFloat32", Float32()},
{"ToFloat64", Float64()},
{"ToStringMapString", Map(String()).String()},
{"ToStringMapStringSlice", Map(String()).Index().String()},
{"ToStringMapBool", Map(String()).Bool()},
{"ToStringMapInt", Map(String()).Int()},
{"ToStringMapInt64", Map(String()).Int64()},
{"ToStringMap", Map(String()).Any()},
{"ToSlice", Index().Any()},
{"ToBoolSlice", Index().Bool()},
{"ToStringSlice", Index().String()},
{"ToIntSlice", Index().Int()},
{"ToInt64Slice", Index().Int64()},
{"ToUintSlice", Index().Uint()},
{"ToFloat64Slice", Index().Float64()},
{"ToDurationSlice", Index().Qual("time", "Duration")},
}
var toSliceFuncs = []struct {
typeName string
returnType *Statement
}{
{"bool", Bool()},
// {"time", Qual("time", "Time")},
{"duration", Qual("time", "Duration")},
{"int", Int()},
{"int8", Int8()},
{"int16", Int16()},
{"int32", Int32()},
{"int64", Int64()},
{"uint", Uint()},
{"uint8", Uint8()},
{"uint16", Uint16()},
{"uint32", Uint32()},
{"uint64", Uint64()},
{"float32", Float32()},
{"float64", Float64()},
}
func main() {
file := NewFile("cast")
file.HeaderComment("Code generated by cast generator. DO NOT EDIT.")
for _, fn := range toFuncs {
if fn.name == "ToTimeInDefaultLocation" {
toFuncWithParams(file, fn.name, fn.returnType, Id("location").Op("*").Qual("time", "Location"))
} else {
toFunc(file, fn.name, fn.returnType)
}
}
for _, fn := range toSliceFuncs {
toSliceEFunc(file, fn.typeName, fn.returnType)
}
fmt.Printf("%#v", file)
}
func toFunc(file *File, funcName string, returnType *Statement) {
toFuncWithParams(file, funcName, returnType)
}
func toFuncWithParams(file *File, funcName string, returnType *Statement, args ...*Statement) {
file.Comment(fmt.Sprintf("%s casts any value to a(n) %s type.", funcName, returnType.GoString()))
varI := Id("i")
arguments := []Code{varI.Clone().Any()}
for _, arg := range args {
arguments = append(arguments, arg)
}
file.Func().
Id(funcName).Params(arguments...).Params(returnType).
BlockFunc(func(g *Group) {
varV := Id("v")
arguments := []Code{varI}
for _, arg := range args {
arguments = append(arguments, (*arg)[0])
}
g.List(varV, Id("_")).Op(":=").Id(funcName + "E").Call(arguments...)
g.Return(varV)
})
}
func toSliceEFunc(file *File, typeName string, returnType *Statement) {
funcName := "To" + strings.ToUpper(typeName[:1]) + typeName[1:] + "SliceE"
sliceReturnType := Index().Add(returnType)
file.Comment(fmt.Sprintf("%s casts any value to a(n) %s type.", funcName, sliceReturnType.GoString()))
varI := Id("i")
file.Func().
Id(funcName).Params(varI.Clone().Any()).Params(sliceReturnType, Error()).
BlockFunc(func(g *Group) {
g.Return(Id("toSliceE").Types(returnType).Call(varI))
})
}
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