96 行
2.5 KiB
Go
96 行
2.5 KiB
Go
package codegen
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import (
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"github.com/dave/jennifer/jen"
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"sort"
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"unicode"
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)
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// Typedef defines a non-struct-based type, its functions, and its methods for
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// Go code generation.
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type Typedef struct {
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comment string
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name string
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concreteType jen.Code
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methods map[string]*Method
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constructors map[string]*Function
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}
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// NewTypedef creates a new commented Typedef.
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func NewTypedef(comment string,
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name string,
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concreteType jen.Code,
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methods []*Method,
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constructors []*Function) *Typedef {
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t := &Typedef{
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comment: comment,
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name: name,
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concreteType: concreteType,
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methods: make(map[string]*Method, len(methods)),
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constructors: make(map[string]*Function, len(constructors)),
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}
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for _, m := range methods {
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t.methods[m.Name()] = m
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}
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for _, c := range constructors {
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t.constructors[c.Name()] = c
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}
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return t
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}
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// Definition generates the Go code required to define and implement this type,
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// its methods, and its functions.
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func (t *Typedef) Definition() jen.Code {
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def := jen.Empty()
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if len(t.comment) > 0 {
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def = jen.Commentf(insertNewlines(t.comment)).Line()
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}
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def = def.Type().Id(
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t.name,
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).Add(
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t.concreteType,
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)
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// Sort the functions and methods
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fs := make([]string, 0, len(t.constructors))
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for _, c := range t.constructors {
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fs = append(fs, c.Name())
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}
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ms := make([]string, 0, len(t.methods))
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for _, m := range t.methods {
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ms = append(ms, m.Name())
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}
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sort.Sort(sort.StringSlice(fs))
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sort.Sort(sort.StringSlice(ms))
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// Add the functions and methods in order
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for _, c := range fs {
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def = def.Line().Line().Add(t.constructors[c].Definition())
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}
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for _, m := range ms {
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def = def.Line().Line().Add(t.methods[m].Definition())
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}
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return def
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}
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// Method obtains the Go code to be generated for the method with a specific
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// name. Panics if no such method exists.
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func (t *Typedef) Method(name string) *Method {
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return t.methods[name]
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}
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// Constructors obtains the Go code to be generated for the function with a
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// specific name. Panics if no such function exists.
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func (t *Typedef) Constructors(name string) *Function {
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return t.constructors[name]
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}
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// ToInterface creates an interface version of this typedef.
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func (t *Typedef) ToInterface(pkg, name, comment string) *Interface {
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fns := make([]FunctionSignature, 0, len(t.methods))
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for _, m := range t.methods {
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if unicode.IsUpper([]rune(m.Name())[0]) {
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fns = append(fns, m.ToFunctionSignature())
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}
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}
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return NewInterface(pkg, name, fns, comment)
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}
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