64 lines
1.5 KiB
Plaintext
64 lines
1.5 KiB
Plaintext
local ds = require("DataStructures")
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local Dictionary, Stack, WordInfo, State = ds.Dictionary, ds.Stack, ds.WordInfo, ds.State
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local CoreHelpers = {}
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function CoreHelpers.defineWord(dict: Dictionary, str: string, func: function(State, ...: any): any..., imm: boolean)
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local info = WordInfo:new(func, imm)
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dict:define(str, info)
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end
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function CoreHelpers.areNumbers(a: any, b: any): boolean
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return a is number and b is number
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end
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function CoreHelpers.getActiveDataStack(state: State): Stack
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return state.activeDataStack
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end
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function CoreHelpers.isNumber(token: string): boolean
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if tonumber(token) ~= nil then
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return true
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else
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return false
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end
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end
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function CoreHelpers.isWhitespace(chr: string): boolean
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return (chr == " " or
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chr == "\t" or
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chr == "\r" or
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chr == "\n" or
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chr == "\v" or
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chr == "\f")
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end
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function CoreHelpers.skipWhitespace(state: State)
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local chr = state.activeInputStream:readCurrentCharacter()
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while (CoreHelpers.isWhitespace(chr)) do
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chr = state.activeInputStream:advanceOffset()
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end
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end
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function CoreHelpers.popTwoOperands(state: State): any, any
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local stack = CoreHelpers.getActiveDataStack(state)
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local b: any = stack:pop()
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local a: any = stack:pop()
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return a, b
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end
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function CoreHelpers.parseToken(state: State): string
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local chr = state.activeInputStream:readCurrentCharacter()
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local token = ""
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while(not CoreHelpers.isWhitespace(chr)) do
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token = token..chr
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chr = state.activeInputStream:advanceOffset()
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end
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return token
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end
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return CoreHelpers
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