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Phase 8.2.4: Lifetime syntax ('a) support

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- Lexer tokenizes 'a as tkLifetime
- Parser accepts lifetimes in type params <'a> and reference types &'a T / &'a mut T
- AST TypeExpr has refLifetime field for tekRef/tekMutRef
- TypeParam gains isLifetime flag for generic monomorphization
- Sema infers lifetime params as no-op dummy values; unwraps pointee types for params inside refs
- HIR lower skips lifetime params when generating mangled names and substitution tables
- &mut expr syntax supported in parser (consumed as part of unary &)
This commit is contained in:
dimgigov
2026-06-01 11:32:40 +03:00
parent 5830548d54
commit bf9e73d56e
6 changed files with 114 additions and 29 deletions
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src/hir_lower.nim
+43 -15
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@@ -564,13 +564,30 @@ proc lowerExpr(ctx: var LowerCtx, expr: Expr): HirNode =
else: discard
if calleeName != "":
var typeSuffix = ""
for i, targ in expr.exprCallInferredTypeArgs:
if i > 0:
typeSuffix.add("_")
if targ.kind == tekNamed:
typeSuffix.add(targ.typeName)
else:
typeSuffix.add("unknown")
var typeArgIdx = 0
if ctx.genericFuncs.hasKey(calleeName):
let genericDecl = ctx.genericFuncs[calleeName]
for j, tp in genericDecl.declFuncTypeParams:
if tp.isLifetime: continue
if typeArgIdx > 0:
typeSuffix.add("_")
if j < expr.exprCallInferredTypeArgs.len:
let targ = expr.exprCallInferredTypeArgs[j]
if targ.kind == tekNamed:
typeSuffix.add(targ.typeName)
else:
typeSuffix.add("unknown")
else:
typeSuffix.add("unknown")
inc(typeArgIdx)
else:
for i, targ in expr.exprCallInferredTypeArgs:
if i > 0:
typeSuffix.add("_")
if targ.kind == tekNamed:
typeSuffix.add(targ.typeName)
else:
typeSuffix.add("unknown")
let mangledName = calleeName & "_" & typeSuffix
let args = ctx.lowerCallArgs(expr.exprCallCallee, expr.exprCallArgs)
return hirCall(mangledName, args, typ, loc)
@@ -1072,14 +1089,17 @@ proc generateMethodInstance(ctx: var LowerCtx, baseMethodName: string, typeArgs:
return baseMethodName
var subst = initTable[string, Type]()
var typeSuffix = ""
var typeArgIdx = 0
for i, tp in genericDecl.declFuncTypeParams:
if i > 0: typeSuffix.add("_")
if i < typeArgs.len:
let argType = ctx.resolveTypeExpr(typeArgs[i])
if tp.isLifetime: continue
if typeArgIdx > 0: typeSuffix.add("_")
if typeArgIdx < typeArgs.len:
let argType = ctx.resolveTypeExpr(typeArgs[typeArgIdx])
subst[tp.name] = argType
typeSuffix.add(argType.toString)
else:
typeSuffix.add("unknown")
inc(typeArgIdx)
let mangledName = baseMethodName & "_" & typeSuffix
if not ctx.generatedFuncInsts.hasKey(mangledName):
var specDecl = Decl(
@@ -1225,21 +1245,29 @@ proc lowerModule*(module: Module, sema: Sema): HirModule =
for inst in instantiations:
let baseName = inst.name
if ctx.genericFuncs.hasKey(baseName):
let genericDecl = ctx.genericFuncs[baseName]
var typeSuffix = ""
for i, targ in inst.typeArgs:
if i > 0: typeSuffix.add("_")
if targ.kind == tekNamed:
typeSuffix.add(targ.typeName)
var nonLifetimeIdx = 0
for j, tp in genericDecl.declFuncTypeParams:
if tp.isLifetime: continue
if nonLifetimeIdx > 0: typeSuffix.add("_")
if j < inst.typeArgs.len:
let targ = inst.typeArgs[j]
if targ.kind == tekNamed:
typeSuffix.add(targ.typeName)
else:
typeSuffix.add("unknown")
else:
typeSuffix.add("unknown")
inc(nonLifetimeIdx)
let mangledName = baseName & "_" & typeSuffix
if not generated.hasKey(mangledName):
# Generate specialized version
let genericDecl = ctx.genericFuncs[baseName]
# Build type substitution table
var subst = initTable[string, Type]()
for j, tp in genericDecl.declFuncTypeParams:
if tp.isLifetime: continue
if j < inst.typeArgs.len:
let targ = inst.typeArgs[j]
if targ.kind == tekNamed: