forked from lix-project/lix
60 lines
1.3 KiB
C++
60 lines
1.3 KiB
C++
#pragma once
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#include "eval.hh"
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#define LocalNoInline(f) static f __attribute__((noinline)); f
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#define LocalNoInlineNoReturn(f) static f __attribute__((noinline, noreturn)); f
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namespace nix {
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LocalNoInlineNoReturn(void throwEvalError(const char * s))
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{
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throw EvalError(s);
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}
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LocalNoInlineNoReturn(void throwTypeError(const char * s, const string & s2))
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{
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throw TypeError(format(s) % s2);
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}
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void EvalState::forceValue(Value & v)
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{
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if (v.type == tThunk) {
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Env * env = v.thunk.env;
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Expr * expr = v.thunk.expr;
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try {
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v.type = tBlackhole;
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//checkInterrupt();
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expr->eval(*this, *env, v);
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} catch (Error & e) {
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v.type = tThunk;
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v.thunk.env = env;
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v.thunk.expr = expr;
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throw;
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}
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}
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else if (v.type == tApp)
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callFunction(*v.app.left, *v.app.right, v);
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else if (v.type == tBlackhole)
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throwEvalError("infinite recursion encountered");
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}
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inline void EvalState::forceAttrs(Value & v)
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{
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forceValue(v);
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if (v.type != tAttrs)
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throwTypeError("value is %1% while an attribute set was expected", showType(v));
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}
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inline void EvalState::forceList(Value & v)
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{
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forceValue(v);
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if (v.type != tList)
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throwTypeError("value is %1% while a list was expected", showType(v));
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}
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}
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