mirror of https://github.com/japl-lang/japl.git
60 lines
1.7 KiB
Nim
60 lines
1.7 KiB
Nim
# Copyright 2020 Mattia Giambirtone
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# Implementation for function objects in JAPL.
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# In JAPL, functions (like any other entity) are First Class Objects.
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# Each function owns its chunk object, which makes the implementation
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# easier and opens up for interesting features in the future, like
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# code objects that can be compiled inside the JAPL runtime, pretty much
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# like in Python
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import jstring
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import jobject
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import strformat
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import ../meta/opcode
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type
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FunctionType* = enum
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FUNC, SCRIPT
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proc newFunction*(name: string = "", chunk: Chunk = newChunk(), arity: int = 0): ptr Function =
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result = allocateObj(Function, ObjectType.Function)
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if name.len > 1:
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result.name = newString(name)
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else:
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result.name = nil
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result.arity = arity
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result.chunk = chunk
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proc isFalsey*(fn: ptr Function): bool =
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return false
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proc stringify*(fn: ptr Function): string =
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if fn.name != nil:
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result = &"<function '{stringify(fn.name)}'>"
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else:
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result = &"<code object>"
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proc valuesEqual*(a, b: ptr Function): bool =
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result = a.name.stringify == b.name.stringify
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proc typeName*(self: ptr Function): string =
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result = "function"
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