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4034 lines (3629 loc) · 115 KB
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//go:build !glj_aot_runtime
package runtime
import (
"bytes"
"encoding/hex"
"fmt"
"go/format"
"go/token"
"io"
"math"
"net/http"
"os"
"path/filepath"
"reflect"
"regexp"
goruntime "runtime"
"sort"
"strings"
"time"
"github.com/glojurelang/glojure/pkg/ast"
"github.com/glojurelang/glojure/pkg/lang"
"github.com/glojurelang/glojure/pkg/pkgmap"
)
// TODO
// - handle namespace requires/uses/etc.
// - handle let bindings that are shared across multiple vars
// - test repeated let bindings of the same name, where previous bindings are shadowed
// varScope represents a variable allocation scope
type varScope struct {
nextNum int
names map[string]string // maps Clojure names to Go variable names
localAtoms map[string]bool // local atoms proven not to escape
}
// recurContext represents the context for a loop/recur form
type recurContext struct {
loopID *lang.Symbol // The loop ID to match recur with its loop
bindings []string // Go variable names for loop bindings (in order)
useGoto bool // Whether to use Go's "goto" for recur
}
// liftedKey is a composite key for deduplicating lifted values
type liftedKey struct {
isPointer bool
pointer uintptr // For reference types
value any // For primitive types (used in equality check)
}
// liftedValue represents a value that has been lifted to package scope
type liftedValue struct {
value any
varName string
}
type varInfo struct {
ns string
sym string
}
type namedVar struct {
name *lang.Symbol
vr *lang.Var
}
type aotReferredVar struct {
symName string
srcNS string
srcSym string
}
type valueInit struct {
name string // Name of the variable or var being initialized
buf bytes.Buffer // Buffer holding the initialization code
deps map[string]struct{} // Set of var/value names this value depends on
}
type aotSpecializationTarget struct {
vr *lang.Var
fn *Fn
arity int
arityDispatch bool
directLinked bool
directArities [21]bool
directFnVar string
directArityVars [21]string
int64FnVar string
int64Analysis *int64AOTAnalysis
float64FnVar string
float64Analysis *float64AOTAnalysis
rootVersionVar string
}
type aotExternalCallTarget struct {
vr *lang.Var
arity int
fnVar string
intrinsic string
directLinked bool
defaultVar string
rootVersionVar string
}
type aotExternalCallKey struct {
vr *lang.Var
arity int
intrinsic string
}
type aotKeywordLookupHelper struct {
name string
keyword string
}
type aotKeywordAssocHelper struct {
name string
keywords []string
}
type aotRecordType struct {
index int
descriptor *lang.RecordType
descriptorGo string
typeName string
constructor string
mapFactory string
fieldNames []string
}
type aotRecordCallTarget struct {
record *aotRecordType
fromMap bool
}
// Generator handles the conversion of AST nodes to Go code
type Generator struct {
originalWriter io.Writer
currentWriter io.Writer
currentValueInit *valueInit // current value initialization being generated
varScopes []varScope // stack of variable scopes
recurStack []recurContext // stack of recur contexts for nested loops
imports map[string]string // set of imported packages with their aliases
varVariables map[varInfo]string // map of vars to their Go variable names
symbolVariables map[string]string // set of all generated symbols to minimize allocations
kwVariables map[string]string // set of all generated keywords to minimize allocations
builtinVariables map[string]string // Go builtins hoisted out of the call sites
keywordMapConstructors map[string]string // co-allocating constructors for those layouts
plainConstantMaps bool // var metadata keeps plain maps, it is read once
keywordLookupHelpers map[string]*aotKeywordLookupHelper
keywordSites int
keywordAssocHelpers map[string]*aotKeywordAssocHelper
aotRecordTypes map[*lang.RecordType]*aotRecordType
valueInits []*valueInit // map of value initializations
aotDeclarations bytes.Buffer
aotCallTargets map[*lang.Var]*aotSpecializationTarget
// metaFnRaw maps the variable holding a metadata-carrying function
// wrapper (see lang.MetaFn) back to the raw FnFuncN variable, so
// direct call targets keep linking to the unwrapped closure.
metaFnRaw map[string]string
aotExternalCallTargets map[aotExternalCallKey]*aotExternalCallTarget
aotNamespace *lang.Namespace
directLink bool
// Fields for handling closures
liftedValues map[liftedKey]*liftedValue // Dedupe by composite key
liftedCounter int // Counter for closed0, closed1...
currentFnEnv lang.Environment // Current function's captured env
// specializationTarget is non-nil only while generating the root function
// value for a Var. Nested function literals retain the generic code path.
specializationTarget *aotSpecializationTarget
}
var (
omittedVars = map[string]bool{
// initialized by the runtime
"#'clojure.core/*in*": true,
"#'clojure.core/*out*": true,
"#'clojure.core/*compile-files*": true,
"#'clojure.core/load-file": true,
"#'clojure.core/add-load-path": true,
"#'clojure.core/shuffle": true,
"#'clojure.core/promise": true,
}
runtimeStateInitializers = map[string]string{
// Loaded namespaces are process-local state. Serializing the compiler
// process's set makes a fresh AOT process skip namespaces it has not
// actually loaded.
"#'clojure.core/*loaded-libs*": "lang.NewRef(lang.NewSet())",
}
)
// NewGenerator creates a new code generator
func NewGenerator(w io.Writer) *Generator {
return newGenerator(w, true)
}
func newGenerator(w io.Writer, directLink bool) *Generator {
return &Generator{
originalWriter: w,
currentWriter: w,
varScopes: []varScope{{nextNum: 0, names: make(map[string]string)}},
recurStack: []recurContext{},
imports: make(map[string]string),
varVariables: make(map[varInfo]string),
symbolVariables: make(map[string]string),
kwVariables: make(map[string]string),
builtinVariables: make(map[string]string),
keywordMapConstructors: make(map[string]string),
keywordLookupHelpers: make(map[string]*aotKeywordLookupHelper),
keywordAssocHelpers: make(map[string]*aotKeywordAssocHelper),
aotRecordTypes: make(map[*lang.RecordType]*aotRecordType),
liftedValues: make(map[liftedKey]*liftedValue),
liftedCounter: 0,
aotCallTargets: make(map[*lang.Var]*aotSpecializationTarget),
metaFnRaw: make(map[string]string),
aotExternalCallTargets: make(map[aotExternalCallKey]*aotExternalCallTarget),
directLink: directLink,
}
}
func runtimeStateInitializer(vr *lang.Var) (string, bool) {
initializer, ok := runtimeStateInitializers[vr.String()]
return initializer, ok
}
// Generate takes a namespace and generates Go code that populates the same namespace
func (g *Generator) Generate(ns *lang.Namespace) error {
g.aotNamespace = ns
// add lang import
g.addImport("github.com/glojurelang/glojure/pkg/lang")
g.addImport("github.com/glojurelang/glojure/pkg/runtime")
g.addImport("fmt") // for error formatting
g.addImport("reflect") // for reflect.TypeOf
var nsBuf bytes.Buffer
g.currentWriter = &nsBuf
g.writef("// reference fmt to avoid unused import error\n")
g.writef("_ = fmt.Printf\n")
g.writef("// reference reflect to avoid unused import error\n")
g.writef("_ = reflect.TypeOf\n")
g.writef(" ns := lang.FindOrCreateNamespace(%s)\n", g.allocSymVar(ns.Name().String()))
g.writef(" _ = ns\n")
// 1. Iterate through ns.Mappings()
// 2. Generate Go code for each var (this discovers lifted values)
mappings := ns.Mappings()
// Collect exact referred vars from compile-time mappings.
var referredVars []aotReferredVar
for seq := mappings.Seq(); seq != nil; seq = seq.Next() {
entry := seq.First()
name, ok := lang.First(entry).(*lang.Symbol)
if !ok {
continue
}
second, _ := lang.Nth(entry, 1)
vr, ok := second.(*lang.Var)
if !ok {
continue
}
// Non-interned = referred from another namespace
if !(vr.Namespace() == ns && lang.Equals(vr.Symbol(), name)) {
referredVars = append(referredVars, aotReferredVar{
symName: name.String(),
srcNS: vr.Namespace().Name().String(),
srcSym: vr.Symbol().String(),
})
}
}
// Emit one batch per source namespace so generated loaders do not build a
// complete persistent mapping snapshot or lock the source for every Var.
referredByNamespace := make(map[string][]aotReferredVar)
var referredNamespaces []string
for _, rv := range referredVars {
if _, ok := referredByNamespace[rv.srcNS]; !ok {
referredNamespaces = append(referredNamespaces, rv.srcNS)
}
referredByNamespace[rv.srcNS] = append(referredByNamespace[rv.srcNS], rv)
}
sort.Strings(referredNamespaces)
for _, srcNS := range referredNamespaces {
refs := referredByNamespace[srcNS]
sort.Slice(refs, func(i, j int) bool {
if refs[i].symName == refs[j].symName {
return refs[i].srcSym < refs[j].srcSym
}
return refs[i].symName < refs[j].symName
})
snapshot, exclusions := snapshotAOTReferences(srcNS, refs)
explicit := refs
if snapshot {
explicit = make([]aotReferredVar, 0, len(refs))
for _, ref := range refs {
if ref.symName != ref.srcSym {
explicit = append(explicit, ref)
}
}
}
srcNSSym := g.allocSymVar(srcNS)
g.writef("{ // refer vars from %s\n", srcNS)
g.writef(" srcNS := lang.FindOrCreateNamespace(%s)\n", srcNSSym)
if snapshot {
g.writef(" ns.ReferAllSnapshot(srcNS, []string{\n")
for _, exclusion := range exclusions {
g.writef(" %q,\n", exclusion)
}
g.writef(" })\n")
}
if len(explicit) != 0 {
g.writef(" ns.ReferAll(srcNS, []lang.NamespaceReference{\n")
for _, rv := range explicit {
symSym := g.allocSymVar(rv.symName)
srcSymSym := g.allocSymVar(rv.srcSym)
g.writef(" {Alias: %s, Source: %s},\n", symSym, srcSymSym)
}
g.writef(" })\n")
}
g.writef("}\n")
}
// Generate alias setup
aliases := ns.Aliases()
for seq := aliases.Seq(); seq != nil; seq = seq.Next() {
entry := seq.First()
aliasSym := lang.First(entry).(*lang.Symbol)
targetNS, _ := lang.Nth(entry, 1)
g.writef("ns.AddAlias(%s, lang.FindOrCreateNamespace(%s))\n",
g.allocSymVar(aliasSym.String()),
g.allocSymVar(targetNS.(*lang.Namespace).Name().String()))
}
var internedVars []namedVar
for seq := mappings.Seq(); seq != nil; seq = seq.Next() {
entry := seq.First()
name, ok := lang.First(entry).(*lang.Symbol)
if !ok {
panic(fmt.Sprintf("expected symbol, got %T", entry))
}
second, _ := lang.Nth(entry, 1)
vr, ok := second.(*lang.Var)
if !ok {
continue // skip non-var mappings
// TODO: handle non-var mappings like direct references to functions or values
// panic(fmt.Sprintf("can't codegen %v: expected var, got %T (%v)", name, second, second))
}
if !(vr.Namespace() == ns && lang.Equals(vr.Symbol(), name)) {
continue // Skip non-interned mappings
}
internedVars = append(internedVars, namedVar{name: name, vr: vr})
}
// Sort internedVars by name for deterministic output
sort.Slice(internedVars, func(i, j int) bool {
return internedVars[i].name.String() < internedVars[j].name.String()
})
g.prepareAOTRecordTypes(internedVars)
g.prepareAOTCallTargets(internedVars)
for _, nv := range internedVars {
if isRuntimeOwnedVar(nv.vr) {
// Skip runtime-owned vars
continue
}
if err := g.generateVar("ns", nv.name, nv.vr); err != nil {
return fmt.Errorf("failed to generate code for var %s: %w", nv.name, err)
}
}
////////////////////////////////////////////////////////////////////////////////
// Generate lifted values at the beginning of init() if any
if len(g.liftedValues) > 0 {
generated := make(map[*liftedValue]bool)
for {
// Generating a lifted closure can discover more captured values.
// Drain them all, sorting each batch for deterministic output.
var sortedLifted []*liftedValue
for _, lifted := range g.liftedValues {
if !generated[lifted] {
sortedLifted = append(sortedLifted, lifted)
}
}
if len(sortedLifted) == 0 {
break
}
sort.Slice(sortedLifted, func(i, j int) bool {
return sortedLifted[i].varName < sortedLifted[j].varName
})
for _, lifted := range sortedLifted {
generated[lifted] = true
g.startNewValueInit(lifted.varName)
g.pushVarScope()
g.writef("{\n")
valueCode := g.generateValue(lifted.value)
// Declare the lifted variable with the final value
g.writef("%s = %s\n", lifted.varName, valueCode)
g.writef("}\n")
g.popVarScope()
}
}
// Declare every captured value before any initializer. Nested closures
// can introduce forward references and cycles while they are generated.
var names []string
for _, lifted := range g.liftedValues {
names = append(names, lifted.varName)
}
sort.Strings(names)
for _, name := range names {
nsBuf.WriteString(fmt.Sprintf("var %s any\n", name))
}
}
////////////////////////////////////////////////////////////////////////////////
// Now construct the complete init function
var initBuf bytes.Buffer
{
// Reproduce the behavior of root-resource function
rootResourceName := nsToPath(ns.Name().String())
initBuf.WriteString(`func init() {
runtime.RegisterNSLoader(` + fmt.Sprintf("%q", rootResourceName) + `, LoadNS)
}
`)
}
initBuf.WriteString(`func checkDerefVar (v *lang.Var) any {
if v.IsMacro() {
panic(lang.NewIllegalArgumentError(fmt.Sprintf("can't take value of macro: %v", v)))
}
return v.Get()
}
`)
initBuf.WriteString(`func checkArity(args []any, expected int) {
if len(args) != expected {
panic(lang.NewIllegalArgumentError("wrong number of arguments (" + fmt.Sprint(len(args)) + ")"))
}
}
`)
initBuf.WriteString(`func checkArityGTE(args []any, min int) {
if len(args) < min {
panic(lang.NewIllegalArgumentError("wrong number of arguments (" + fmt.Sprint(len(args)) + ")"))
}
}
`)
initBuf.WriteString(fmt.Sprintf("// LoadNS initializes the namespace %q\n", ns.Name().String()))
initBuf.WriteString("func LoadNS() {\n")
//////////////////////////
// Symbols
var symbolNames []string
for sym := range g.symbolVariables {
symbolNames = append(symbolNames, sym)
}
sort.Strings(symbolNames) // Sort for deterministic output
for _, sym := range symbolNames {
varName := g.symbolVariables[sym]
initBuf.WriteString(fmt.Sprintf("%s := lang.NewSymbolUnchecked(%q)\n", varName, sym))
}
//////////////////////////
// Keywords
var kwNames []string
for kw := range g.kwVariables {
kwNames = append(kwNames, kw)
}
sort.Strings(kwNames) // Sort for deterministic output
for _, kw := range kwNames {
varName := g.kwVariables[kw]
initBuf.WriteString(fmt.Sprintf("%s := lang.NewKeyword(%q)\n", varName, kw))
}
//////////////////////////
// Go builtins
// Looking a builtin up in lang.Builtins hashes its name, so each one
// is read once here and the call sites use the local.
var builtinNames []string
for name := range g.builtinVariables {
builtinNames = append(builtinNames, name)
}
sort.Strings(builtinNames)
for _, name := range builtinNames {
varName := g.builtinVariables[name]
initBuf.WriteString(fmt.Sprintf("%s := lang.Builtins[%q]\n", varName, name))
}
//////////////////////////
// Vars initialization
var varNames []string
var inverseVarMap = make(map[string]varInfo)
for vi, varName := range g.varVariables {
varNames = append(varNames, varName)
inverseVarMap[varName] = vi
}
sort.Strings(varNames) // Sort for deterministic output
for _, varName := range varNames {
vi := inverseVarMap[varName]
initBuf.WriteString(fmt.Sprintf("// var %s/%s\n", vi.ns, vi.sym))
// NB: the variables will already have been allocated
initBuf.WriteString(fmt.Sprintf("%s := lang.InternVarName(%s, %s)\n", varName, g.allocSymVar(vi.ns), g.allocSymVar(vi.sym)))
}
/////////////////////////////
// Roots of statically resolved calls to other namespaces
externalTargets := make([]*aotExternalCallTarget, 0, len(g.aotExternalCallTargets))
for _, target := range g.aotExternalCallTargets {
externalTargets = append(externalTargets, target)
}
sort.Slice(externalTargets, func(i, j int) bool {
return externalTargets[i].fnVar < externalTargets[j].fnVar
})
for _, target := range externalTargets {
if target.intrinsic != "" && target.directLinked {
continue
}
varName := g.allocVarVar(
target.vr.Namespace().Name().String(),
target.vr.Symbol().String(),
)
if target.intrinsic != "" {
initBuf.WriteString(fmt.Sprintf(
"%s := runtime.IsDefaultCoreVar(%s)\n%s := %s.RootVersion()\n",
target.defaultVar,
varName,
target.rootVersionVar,
varName,
))
continue
}
adapter := "Cache"
if target.directLinked {
adapter = "Link"
}
initBuf.WriteString(fmt.Sprintf(
"%s := aot%sFn%d(%s)\n",
target.fnVar, adapter, target.arity, varName,
))
}
/////////////////////////////
// Var and closed-over value inits
// NS boilerplate
initBuf.Write(nsBuf.Bytes())
{
sort.Slice(g.valueInits, func(i, j int) bool {
return g.valueInits[i].name < g.valueInits[j].name
})
dependents := make(map[string][]*valueInit)
for _, vi := range g.valueInits {
for dep := range vi.deps {
if dep == vi.name {
continue // skip self-dependency
}
dependents[dep] = append(dependents[dep], vi)
}
}
// // print dependencies for debugging
// for _, vi := range g.valueInits {
// fmt.Printf("# %s\n", vi.name)
// for dep := range vi.deps {
// fmt.Printf(" -> %s\n", dep)
// }
// fmt.Println()
// }
// Simple dependency resolution: repeatedly emit value inits that have no remaining deps
emitted := make(map[string]bool)
for len(emitted) < len(g.valueInits) {
progress := false
for _, vi := range g.valueInits {
if emitted[vi.name] {
continue // already emitted
}
// Check if all dependencies have been emitted
allDepsEmitted := true
for dep := range vi.deps {
if !emitted[dep] {
allDepsEmitted = false
break
}
}
if allDepsEmitted {
// Emit this value init
initBuf.WriteString(vi.buf.String())
emitted[vi.name] = true
progress = true
// Remove this from dependents
for _, depVi := range dependents[vi.name] {
delete(depVi.deps, vi.name)
}
}
}
if !progress {
// Circular dependency detected; break the cycle by emitting one of the remaining inits
for _, vi := range g.valueInits {
if !emitted[vi.name] {
initBuf.WriteString(vi.buf.String())
emitted[vi.name] = true
break
}
}
}
}
}
// Closing brace for LoadNS
initBuf.WriteString("}\n")
g.generateAOTKeywordHelpers()
g.generateAOTExternalAdapters()
////////////////////////////////////////////////////////////////////////////////
// Prepare the final source
sourceBytes := []byte(g.header(mungePackageName(getLastNSPart(ns.Name().String())))) // File header with package and imports
sourceBytes = append(sourceBytes, g.aotDeclarations.Bytes()...) // Package-level AOT call caches
sourceBytes = append(sourceBytes, initBuf.Bytes()...) // The complete init function
// Format the generated code
formatted, err := format.Source(sourceBytes)
if err != nil {
// If formatting fails, write the unformatted code with the error
g.originalWriter.Write(sourceBytes)
return fmt.Errorf("formatting failed: %w\n", err)
}
// Write formatted code to the original writer
_, err = g.originalWriter.Write(formatted)
return err
}
func snapshotAOTReferences(
sourceName string,
refs []aotReferredVar,
) (bool, []string) {
source := lang.FindNamespace(lang.NewSymbol(sourceName))
if source == nil {
return false, nil
}
direct := make(map[string]struct{}, len(refs))
for _, ref := range refs {
if ref.symName == ref.srcSym {
direct[ref.symName] = struct{}{}
}
}
if len(direct) == 0 {
return false, nil
}
var exclusions []string
for seq := source.Mappings().Seq(); seq != nil; seq = seq.Next() {
entry := seq.First()
name, ok := lang.First(entry).(*lang.Symbol)
if !ok {
continue
}
value, _ := lang.Nth(entry, 1)
vr, ok := value.(*lang.Var)
if !ok || vr.Namespace() != source ||
vr.Symbol().String() != name.String() {
continue
}
if _, included := direct[name.String()]; !included {
exclusions = append(exclusions, name.String())
}
}
if len(exclusions) >= len(direct) {
return false, nil
}
sort.Strings(exclusions)
return true, exclusions
}
////////////////////////////////////////////////////////////////////////////////
// generateVar generates Go code for a single Var
func (g *Generator) generateVar(nsVariableName string, name *lang.Symbol, vr *lang.Var) error {
if omittedVars[vr.String()] {
// Skip omitted vars like *in* and *out*, which are initialized by the runtime
return nil
}
// Generate code for the var
varVar := g.allocVarVar(vr.Namespace().Name().String(), name.String())
g.startNewValueInit(varVar)
g.pushVarScope()
defer g.popVarScope()
defer func() { g.specializationTarget = nil }()
g.writef("// %s\n", name.String())
g.writef("{\n")
defer g.writef("}\n")
meta := vr.Meta()
varSym := g.allocateTempVar()
var isDynamic bool
g.writef("%s := %s\n", varSym, g.allocSymVar(name.String()))
if !lang.IsNil(meta) && RT.BooleanCast(lang.Get(meta, lang.KWDynamic)) {
isDynamic = true
}
// check if the var has a value
if initializer, ok := runtimeStateInitializer(vr); ok {
g.writef("%s = %s.InternWithValue(%s, %s, true)\n", varVar, nsVariableName, varSym, initializer)
} else if vr.IsBound() {
// we call Get() on a new goroutine to ensure we get the root value in the case
// of dynamic vars
valChan := make(chan any)
go func() {
valChan <- vr.Get()
}()
v := <-valChan
if target := g.aotCallTargets[vr]; target != nil {
g.specializationTarget = target
}
valueExpr := g.generateValue(v)
if target := g.specializationTarget; target != nil {
direct := valueExpr
if raw, ok := g.metaFnRaw[valueExpr]; ok {
direct = raw
}
g.writef("%s = %s\n", target.directFnVar, direct)
}
g.writef("%s = %s.InternWithValue(%s, %s, true)\n", varVar, nsVariableName, varSym, valueExpr)
if target := g.specializationTarget; target != nil && target.rootVersionVar != "" {
g.writef("%s = %s.RootVersion()\n", target.rootVersionVar, varVar)
}
} else {
g.writef("%s = %s.Intern(%s)\n", varVar, nsVariableName, varSym)
}
// Set metadata on the var if the symbol has metadata
if meta != nil {
isMacro := RT.BooleanCast(lang.Get(meta, lang.KWMacro))
g.writef("%s.SetMetaLazyMacro(func() lang.IPersistentMap {\n", varVar)
g.pushVarScope()
g.plainConstantMaps = true
metaVariable := g.generateValue(meta)
g.plainConstantMaps = false
g.writef("\treturn %s\n", metaVariable)
g.popVarScope()
g.writef("}, %t)\n", isMacro)
}
if isDynamic {
g.writef("%s.SetDynamic()\n", varVar)
}
return nil
}
////////////////////////////////////////////////////////////////////////////////
// Value Generation
// returns the variable name or constant expression for the value
func (g *Generator) generateValue(value any) string {
switch v := value.(type) {
case *lang.RecordType:
return g.allocAOTRecordType(v).descriptorGo
case *lang.RecordConstructor:
return g.generateRecordConstructorValue(v)
case *lang.Class:
return g.generateClassValue(v)
case reflect.Type:
return g.generateTypeValue(v)
case *lang.Atom:
return g.generateAtomValue(v)
case *lang.Ref:
return g.generateRefValue(v)
case *lang.Var:
// Generate a reference to a Var
ns := v.Namespace()
sym := v.Symbol()
return fmt.Sprintf("lang.FindOrCreateNamespace(%s).FindInternedVar(%s)", g.allocSymVar(ns.Name().String()), g.allocSymVar(sym.String()))
case *lang.Namespace:
return fmt.Sprintf("lang.FindOrCreateNamespace(%s)", g.allocSymVar(v.Name().String()))
case *lang.NumberMethods:
// Numbers is a stateless, package-level host-method receiver.
return "lang.Numbers"
case *lang.LockingTransactor:
return "lang.LockingTransaction"
case *http.Client:
if v == http.DefaultClient {
return g.addImportWithAlias("net/http") + ".DefaultClient"
}
panic("cannot generate a non-default HTTP client")
case *os.File:
alias := g.addImportWithAlias("os")
switch v {
case os.Stdin:
return alias + ".Stdin"
case os.Stdout:
return alias + ".Stdout"
case os.Stderr:
return alias + ".Stderr"
default:
panic("cannot generate a non-standard file handle")
}
case *RTMethods:
// RT is the package-level host-method receiver used by core forms.
return "runtime.RT"
case *evalCompiler:
return "runtime.Compiler"
case *Fn:
return g.generateFn(v)
case lang.FnFunc:
return g.generateFnFunc(v)
case lang.IPersistentMap:
return g.generateMapValue(v)
case lang.IPersistentVector:
return g.generateVectorValue(v)
case lang.IPersistentSet:
return g.generateSetValue(v)
case *lang.MultiFn:
return g.generateMultiFn(v)
case *lang.Volatile:
return fmt.Sprintf("lang.NewVolatile(%s)", g.generateValue(v.Deref()))
case *lang.Delay:
fn := v.PendingFn()
if fn == nil {
panic("cannot generate an already-realized delay")
}
return fmt.Sprintf("lang.NewDelay(%s)", g.generateValue(fn))
case lang.Keyword:
if ns := v.Namespace(); ns != nil {
return g.allocKWVar(fmt.Sprintf("%s/%s", ns, v.Name()))
} else {
return g.allocKWVar(v.Name())
}
case *lang.Symbol:
return g.allocSymVar(v.String())
case lang.Char:
return fmt.Sprintf("lang.NewChar(%#v)", rune(v))
case string:
// just return the string as a Go string literal
return fmt.Sprintf("%#v", v)
case int:
return fmt.Sprintf("int(%d)", v)
case int64:
return fmt.Sprintf("int64(%d)", v)
case float64:
return fmt.Sprintf("float64(%s)", g.generateFloatLiteral(v, 64))
case float32:
return fmt.Sprintf("float32(%s)", g.generateFloatLiteral(float64(v), 32))
case time.Duration:
alias := g.addImportWithAlias("time")
return fmt.Sprintf("%s.Duration(%d)", alias, int64(v))
case *regexp.Regexp:
return fmt.Sprintf("%s.MustCompile(%#v)", g.addImportWithAlias("regexp"), v.String())
case *lang.BigDecimal:
return g.generateBigDecimalValue(v)
case *lang.BigInt:
return generateBigIntValue(v)
case *lang.Ratio:
return generateRatioValue(v)
case bool:
// return the boolean as a Go boolean literal
if v {
return "true"
}
return "false"
case nil:
return "nil"
default:
if lang.IsSeq(v) {
var vals []string
for seq := lang.Seq(v); seq != nil; seq = seq.Next() {
first := seq.First()
vals = append(vals, g.generateValue(first))
}
return fmt.Sprintf("lang.NewList(%s)", strings.Join(vals, ", "))
}
if fname, ok := getWellKnownFunctionName(v); ok {
if fname == "math.IsNaN" {
return g.addImportWithAlias("math") + ".IsNaN"
}
return fname
}
rv := reflect.ValueOf(v)
if scalar, ok := g.generateNamedScalarValue(rv); ok {
return scalar
}
if rv.IsValid() && rv.Kind() == reflect.Func {
if fn := goruntime.FuncForPC(rv.Pointer()); fn != nil {
const langPrefix = "github.com/glojurelang/glojure/pkg/lang."
if name := strings.TrimPrefix(fn.Name(), langPrefix); name != fn.Name() && token.IsIdentifier(name) {
return "lang." + name
}
if name := strings.TrimPrefix(fn.Name(), "math."); name != fn.Name() && token.IsIdentifier(name) {
return g.addImportWithAlias("math") + "." + name
}
if pkgName, name, ok := strings.Cut(fn.Name(), "."); ok &&
token.IsIdentifier(name) &&
map[string]bool{
"errors": true,
"fmt": true,
"sort": true,
"strings": true,
}[pkgName] {
return g.addImportWithAlias(pkgName) + "." + name
}
if dot := strings.LastIndexByte(fn.Name(), '.'); dot > 0 {
pkgPath, name := fn.Name()[:dot], fn.Name()[dot+1:]
pkgBase := pkgPath[strings.LastIndexByte(pkgPath, '/')+1:]
if !strings.ContainsRune(pkgBase, '.') && token.IsIdentifier(name) {
return g.addImportWithAlias(pkgPath) + "." + name
}
}
panic(fmt.Sprintf("unsupported function value %T (%s)", v, fn.Name()))
}
}
panic(fmt.Sprintf("unsupported value type %T: %v", v, v))
}
}
// generateNamedScalarValue emits constants whose Go type has a name, such as
// fs.FileMode or uuid.UUID. Host symbols resolve to their exact Go values
// during analysis, so AOT generation must preserve both the value and its
// named type.
func (g *Generator) generateNamedScalarValue(v reflect.Value) (string, bool) {
if !v.IsValid() || v.Type().Name() == "" {
return "", false
}
typeName := g.getTypeString(v.Type())
switch v.Kind() {
case reflect.Bool:
return fmt.Sprintf("%s(%t)", typeName, v.Bool()), true
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return fmt.Sprintf("%s(%d)", typeName, v.Int()), true
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return fmt.Sprintf("%s(%d)", typeName, v.Uint()), true
case reflect.Float32, reflect.Float64:
return fmt.Sprintf("%s(%s)", typeName, g.generateFloatLiteral(v.Float(), v.Type().Bits())), true
case reflect.Complex64, reflect.Complex128:
bits := v.Type().Bits() / 2
value := v.Complex()
return fmt.Sprintf(
"%s(complex(%s, %s))",
typeName,
g.generateFloatLiteral(real(value), bits),
g.generateFloatLiteral(imag(value), bits),
), true
case reflect.String:
return fmt.Sprintf("%s(%q)", typeName, v.String()), true
case reflect.Array:
elements := make([]string, v.Len())
for i := range elements {
element, ok := g.generateScalarLiteral(v.Index(i))
if !ok {
return "", false
}
elements[i] = element
}
return fmt.Sprintf("%s{%s}", typeName, strings.Join(elements, ", ")), true
default:
return "", false
}
}
func (g *Generator) generateScalarLiteral(v reflect.Value) (string, bool) {
switch v.Kind() {
case reflect.Bool:
return fmt.Sprintf("%t", v.Bool()), true
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return fmt.Sprintf("%d", v.Int()), true
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
return fmt.Sprintf("%d", v.Uint()), true
case reflect.Float32, reflect.Float64:
return g.generateFloatLiteral(v.Float(), v.Type().Bits()), true
case reflect.Complex64, reflect.Complex128:
bits := v.Type().Bits() / 2