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opt / golang / 1.19.4 / src / cmd / compile / internal / noder /

📁 ..
📄 codes.go(1.27 KB)
📄 decl.go(10.83 KB)
📄 export.go(800 B)
📄 expr.go(14.16 KB)
📄 func.go(1.9 KB)
📄 helpers.go(5.96 KB)
📄 import.go(10.31 KB)
📄 irgen.go(11.3 KB)
📄 lex.go(5.06 KB)
📄 lex_test.go(3.64 KB)
📄 linker.go(7.05 KB)
📄 noder.go(13.33 KB)
📄 object.go(5.56 KB)
📄 posmap.go(2.02 KB)
📄 quirks.go(1.8 KB)
📄 reader.go(58.09 KB)
📄 scopes.go(1.49 KB)
📄 sizes.go(4.04 KB)
📄 stencil.go(79.07 KB)
📄 stmt.go(8.67 KB)
📄 transform.go(28.22 KB)
📄 types.go(16.72 KB)
📄 unified.go(9.09 KB)
📄 validate.go(3.09 KB)
📄 writer.go(41.38 KB)

Editing: quirks.go

// UNREVIEWED

// Copyright 2021 The Go 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 noder

import (
	"fmt"

"cmd/compile/internal/syntax"
)

// This file defines helper functions useful for satisfying toolstash
// -cmp when compared against the legacy frontend behavior, but can be
// removed after that's no longer a concern.

// typeExprEndPos returns the position that noder would leave base.Pos
// after parsing the given type expression.
func typeExprEndPos(expr0 syntax.Expr) syntax.Pos {
	for {
		switch expr := expr0.(type) {
		case *syntax.Name:
			return expr.Pos()
		case *syntax.SelectorExpr:
			return expr.X.Pos()

case *syntax.ParenExpr:
			expr0 = expr.X

case *syntax.Operation:
			assert(expr.Op == syntax.Mul)
			assert(expr.Y == nil)
			expr0 = expr.X

case *syntax.ArrayType:
			expr0 = expr.Elem
		case *syntax.ChanType:
			expr0 = expr.Elem
		case *syntax.DotsType:
			expr0 = expr.Elem
		case *syntax.MapType:
			expr0 = expr.Value
		case *syntax.SliceType:
			expr0 = expr.Elem

case *syntax.StructType:
			return expr.Pos()

case *syntax.InterfaceType:
			expr0 = lastFieldType(expr.MethodList)
			if expr0 == nil {
				return expr.Pos()
			}

case *syntax.FuncType:
			expr0 = lastFieldType(expr.ResultList)
			if expr0 == nil {
				expr0 = lastFieldType(expr.ParamList)
				if expr0 == nil {
					return expr.Pos()
				}
			}

case *syntax.IndexExpr: // explicit type instantiation
			targs := unpackListExpr(expr.Index)
			expr0 = targs[len(targs)-1]

default:
			panic(fmt.Sprintf("%s: unexpected type expression %v", expr.Pos(), syntax.String(expr)))
		}
	}
}

func lastFieldType(fields []*syntax.Field) syntax.Expr {
	if len(fields) == 0 {
		return nil
	}
	return fields[len(fields)-1].Type
}

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Editing: quirks.go

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