typelists.go

     1  // Code generated by "go test -run=Generate -write=all"; DO NOT EDIT.
     2  // Source: ../../cmd/compile/internal/types2/typelists.go
     3  
     4  // Copyright 2021 The Go Authors. All rights reserved.
     5  // Use of this source code is governed by a BSD-style
     6  // license that can be found in the LICENSE file.
     7  
     8  package types
     9  
    10  // TypeParamList holds a list of type parameters.
    11  type TypeParamList struct{ tparams []*TypeParam }
    12  
    13  // Len returns the number of type parameters in the list.
    14  // It is safe to call on a nil receiver.
    15  func (l *TypeParamList) Len() int { return len(l.list()) }
    16  
    17  // At returns the i'th type parameter in the list.
    18  func (l *TypeParamList) At(i int) *TypeParam { return l.tparams[i] }
    19  
    20  // list is for internal use where we expect a []*TypeParam.
    21  // TODO(rfindley): list should probably be eliminated: we can pass around a
    22  // TypeParamList instead.
    23  func (l *TypeParamList) list() []*TypeParam {
    24  	if l == nil {
    25  		return nil
    26  	}
    27  	return l.tparams
    28  }
    29  
    30  // TypeList holds a list of types.
    31  type TypeList struct{ types []Type }
    32  
    33  // newTypeList returns a new TypeList with the types in list.
    34  func newTypeList(list []Type) *TypeList {
    35  	if len(list) == 0 {
    36  		return nil
    37  	}
    38  	return &TypeList{list}
    39  }
    40  
    41  // Len returns the number of types in the list.
    42  // It is safe to call on a nil receiver.
    43  func (l *TypeList) Len() int { return len(l.list()) }
    44  
    45  // At returns the i'th type in the list.
    46  func (l *TypeList) At(i int) Type { return l.types[i] }
    47  
    48  // list is for internal use where we expect a []Type.
    49  // TODO(rfindley): list should probably be eliminated: we can pass around a
    50  // TypeList instead.
    51  func (l *TypeList) list() []Type {
    52  	if l == nil {
    53  		return nil
    54  	}
    55  	return l.types
    56  }
    57  
    58  // ----------------------------------------------------------------------------
    59  // Implementation
    60  
    61  func bindTParams(list []*TypeParam) *TypeParamList {
    62  	if len(list) == 0 {
    63  		return nil
    64  	}
    65  	for i, typ := range list {
    66  		if typ.index >= 0 {
    67  			panic("type parameter bound more than once")
    68  		}
    69  		typ.index = i
    70  	}
    71  	return &TypeParamList{tparams: list}
    72  }
    73
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