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54 lines
1.6 KiB
Nim
54 lines
1.6 KiB
Nim
discard """
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output: '''top level statements are executed!
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2.0
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my secret
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11
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12
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'''
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"""
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## Example program that demonstrates how to use the
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## compiler as an API to embed into your own projects.
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import "../../compiler" / [ast, vmdef, vm, nimeval, llstream]
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import std / [os]
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proc main() =
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let std = findNimStdLibCompileTime()
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var intr = createInterpreter("myscript.nim",[std, parentDir(currentSourcePath)])
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intr.implementRoutine("*", "exposed", "addFloats", proc (a: VmArgs) =
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setResult(a, getFloat(a, 0) + getFloat(a, 1) + getFloat(a, 2))
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)
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intr.evalScript()
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let foreignProc = selectRoutine(intr, "hostProgramRunsThis")
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if foreignProc == nil:
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quit "script does not export a proc of the name: 'hostProgramRunsThis'"
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let res = intr.callRoutine(foreignProc, [newFloatNode(nkFloatLit, 0.9),
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newFloatNode(nkFloatLit, 0.1)])
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doAssert res.kind == nkFloatLit
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echo res.floatVal
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let foreignValue = selectUniqueSymbol(intr, "hostProgramWantsThis")
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if foreignValue == nil:
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quit "script does not export a global of the name: hostProgramWantsThis"
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let val = intr.getGlobalValue(foreignValue)
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doAssert val.kind in {nkStrLit..nkTripleStrLit}
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echo val.strVal
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destroyInterpreter(intr)
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main()
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block issue9180:
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proc evalString(code: string, moduleName = "script.nim") =
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let stream = llStreamOpen(code)
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let std = findNimStdLibCompileTime()
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var intr = createInterpreter(moduleName, [std])
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intr.evalScript(stream)
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destroyInterpreter(intr)
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llStreamClose(stream)
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evalString("echo 10+1")
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evalString("echo 10+2")
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