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type.go
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type.go
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// Copyright © 2018 Xavier Basty <xbasty@gmail.com>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package vm
// Type is the common interface for all supported types
type Type interface {
// Compat returns whether this type is compatible with another type.
// If conv is false, this is normal compatibility, where two named types are compatible only if they are the same named type.
// If conv if true, this is conversion compatibility, where two named types are conversion compatible if their definitions are conversion compatible.
Compat(t Type, conv bool) bool // TODO: Deal with recursive types
// Lit returns this type's literal.
// If this is a named type, this is the unnamed underlying type.
// Otherwise, this is an identity operation.
Lit() Type
// IsBoolean returns true if this is a boolean type.
IsBoolean() bool
// IsInteger returns true if this is an integer type.
IsInteger() bool
// IsFloat returns true if this is a floating type.
IsFloat() bool
// IsIdeal returns true if this represents an ideal value.
IsIdeal() bool
// Zero returns a new zero value of this type.
Zero() Value
// String returns the string representation of this type.
String() string
}