/
gen_type_def.go
240 lines (212 loc) · 6.28 KB
/
gen_type_def.go
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// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package javascript
import (
"fmt"
"v.io/v23/vdl"
"v.io/x/ref/lib/vdl/vdlutil"
)
// makeTypeDefinitionsString generates a string that defines the specified types.
// It consists of the following sections:
// - Definitions. e.g. "var _typeNamedBool = new Type();"
// - Field assignments. e.g. "_typeNamedBool.name = \"NamedBool\";"
// - Type Freezes, e.g. "_typedNamedBool.freeze();"
// - Constructor definitions. e.g. "types.NamedBool = Registry.lookupOrCreateConstructor(_typeNamedBool)"
func makeTypeDefinitionsString(jsnames typeNames) string {
str := ""
sortedDefs := jsnames.SortedList()
for _, def := range sortedDefs {
str += makeDefString(def.Name)
}
for _, def := range sortedDefs {
str += makeTypeFieldAssignmentString(def.Name, def.Type, jsnames)
}
for _, def := range sortedDefs {
str += makeTypeFreezeString(def.Name)
}
for _, def := range sortedDefs {
if def.Type.Name() != "" {
if def.Type.Kind() == vdl.Enum {
str += makeEnumLabelString(def.Type, jsnames)
} else {
str += makeConstructorDefinitionString(def.Type, jsnames)
}
}
}
return str
}
// makeDefString generates a type definition for the specified type name.
// e.g. "var _typeNamedBool = new Type();"
func makeDefString(jsname string) string {
return fmt.Sprintf("var %s = new vdl.Type();\n", jsname)
}
// makeTypeFreezeString calls the type's freeze function to finalize it.
// e.g. "typeNamedBool.freeze();"
func makeTypeFreezeString(jsname string) string {
return fmt.Sprintf("%s.freeze();\n", jsname)
}
// makeTypeFieldAssignmentString generates assignments for type fields.
// e.g. "_typeNamedBool.name = \"NamedBool\";"
func makeTypeFieldAssignmentString(jsname string, t *vdl.Type, jsnames typeNames) string {
// kind
str := fmt.Sprintf("%s.kind = %s;\n", jsname, jsKind(t.Kind()))
// name
str += fmt.Sprintf("%s.name = %q;\n", jsname, t.Name())
// labels
if t.Kind() == vdl.Enum {
str += fmt.Sprintf("%s.labels = [", jsname)
for i := 0; i < t.NumEnumLabel(); i++ {
if i > 0 {
str += ", "
}
str += fmt.Sprintf("%q", t.EnumLabel(i))
}
str += "];\n"
}
// len
if t.Kind() == vdl.Array { // Array is the only type where len is valid.
str += fmt.Sprintf("%s.len = %d;\n", jsname, t.Len())
}
// elem
switch t.Kind() {
case vdl.Optional, vdl.Array, vdl.List, vdl.Map:
str += fmt.Sprintf("%s.elem = %s;\n", jsname, jsnames.LookupType(t.Elem()))
}
// key
switch t.Kind() {
case vdl.Set, vdl.Map:
str += fmt.Sprintf("%s.key = %s;\n", jsname, jsnames.LookupType(t.Key()))
}
// fields
switch t.Kind() {
case vdl.Struct, vdl.Union:
str += fmt.Sprintf("%s.fields = [", jsname)
for i := 0; i < t.NumField(); i++ {
if i > 0 {
str += ", "
}
field := t.Field(i)
str += fmt.Sprintf("{name: %q, type: %s}", field.Name, jsnames.LookupType(field.Type))
}
str += "];\n"
}
return str
}
// makeConstructorDefinitionString creates a string that defines the constructor for the type.
// e.g. "module.exports.NamedBool = Registry.lookupOrCreateConstructor(_typeNamedBool)"
func makeConstructorDefinitionString(t *vdl.Type, jsnames typeNames) string {
_, name := vdl.SplitIdent(t.Name())
ctorName := jsnames.LookupConstructor(t)
return fmt.Sprintf("module.exports.%s = %s;\n", name, ctorName)
}
// makeEnumLabelString creates a string that defines the labels in an enum.
// e.g. `module.Exports.MyEnum = {
// ALabel: (Registry.lookupOrCreateConstructor(_typeMyEnum))("ALabel"),
// BLabel: (Registry.lookupOrCreateConstructor(_typeMyEnum))("BLabel"),
// }`
func makeEnumLabelString(t *vdl.Type, jsnames typeNames) string {
_, name := vdl.SplitIdent(t.Name())
str := fmt.Sprintf("module.exports.%s = {\n", name)
for i := 0; i < t.NumEnumLabel(); i++ {
enumVal := vdl.ZeroValue(t)
enumVal.AssignEnumIndex(i)
str += fmt.Sprintf(" %s: %s,\n", vdlutil.ToConstCase(t.EnumLabel(i)), typedConst(jsnames, enumVal))
}
str += "};\n"
return str
}
func jsKind(k vdl.Kind) string {
switch k {
case vdl.Any:
return "vdl.kind.ANY"
case vdl.Union:
return "vdl.kind.UNION"
case vdl.Optional:
return "vdl.kind.OPTIONAL"
case vdl.Bool:
return "vdl.kind.BOOL"
case vdl.Byte:
return "vdl.kind.BYTE"
case vdl.Uint16:
return "vdl.kind.UINT16"
case vdl.Uint32:
return "vdl.kind.UINT32"
case vdl.Uint64:
return "vdl.kind.UINT64"
case vdl.Int8:
return "vdl.kind.INT8"
case vdl.Int16:
return "vdl.kind.INT16"
case vdl.Int32:
return "vdl.kind.INT32"
case vdl.Int64:
return "vdl.kind.INT64"
case vdl.Float32:
return "vdl.kind.FLOAT32"
case vdl.Float64:
return "vdl.kind.FLOAT64"
case vdl.String:
return "vdl.kind.STRING"
case vdl.Enum:
return "vdl.kind.ENUM"
case vdl.TypeObject:
return "vdl.kind.TYPEOBJECT"
case vdl.Array:
return "vdl.kind.ARRAY"
case vdl.List:
return "vdl.kind.LIST"
case vdl.Set:
return "vdl.kind.SET"
case vdl.Map:
return "vdl.kind.MAP"
case vdl.Struct:
return "vdl.kind.STRUCT"
}
panic(fmt.Errorf("val: unhandled kind: %d", k))
}
// builtinJSType indicates whether a vdl.Type has built-in type definition in vdl.js
// If true, then it returns a pointer to the type definition in javascript/types.js
// It assumes a variable named "vdl.Types" is already pointing to vom.Types
func builtinJSType(t *vdl.Type) (string, bool) {
_, n := vdl.SplitIdent(t.Name())
if t == vdl.ErrorType {
return "vdl.types.ERROR", true
}
// named types are not built-in.
if n != "" {
return "", false
}
// switch on supported types in vdl.js
switch t.Kind() {
case vdl.Any:
return "vdl.types.ANY", true
case vdl.Bool:
return "vdl.types.BOOL", true
case vdl.Byte:
return "vdl.types.BYTE", true
case vdl.Uint16:
return "vdl.types.UINT16", true
case vdl.Uint32:
return "vdl.types.UINT32", true
case vdl.Uint64:
return "vdl.types.UINT64", true
case vdl.Int8:
return "vdl.types.INT8", true
case vdl.Int16:
return "vdl.types.INT16", true
case vdl.Int32:
return "vdl.types.INT32", true
case vdl.Int64:
return "vdl.types.INT64", true
case vdl.Float32:
return "vdl.types.FLOAT32", true
case vdl.Float64:
return "vdl.types.FLOAT64", true
case vdl.String:
return "vdl.types.STRING", true
case vdl.TypeObject:
return "vdl.types.TYPEOBJECT", true
}
return "", false
}