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Generialize showType

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This commit is contained in:
John Ericson 2023-06-21 16:06:16 -04:00
parent 559fd7ffe7
commit e8067daf09
2 changed files with 16 additions and 12 deletions
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23
src/libexpr/eval.cc
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@ -211,20 +211,21 @@ const Value * getPrimOp(const Value &v) {
return primOp; return primOp;
} }
std::string_view showType(ValueType type) std::string_view showType(ValueType type, bool withArticle)
{ {
#define WA(a, w) withArticle ? a " " w : w
switch (type) { switch (type) {
case nInt: return "an integer"; case nInt: return WA("an", "integer");
case nBool: return "a Boolean"; case nBool: return WA("a", "Boolean");
case nString: return "a string"; case nString: return WA("a", "string");
case nPath: return "a path"; case nPath: return WA("a", "path");
case nNull: return "null"; case nNull: return "null";
case nAttrs: return "a set"; case nAttrs: return WA("a", "set");
case nList: return "a list"; case nList: return WA("a", "list");
case nFunction: return "a function"; case nFunction: return WA("a", "function");
case nExternal: return "an external value"; case nExternal: return WA("an", "external value");
case nFloat: return "a float"; case nFloat: return WA("a", "float");
case nThunk: return "a thunk"; case nThunk: return WA("a", "thunk");
} }
abort(); abort();
} }

5
src/libexpr/eval.hh
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@ -704,8 +704,11 @@ struct DebugTraceStacker {
/** /**
* @return A string representing the type of the value `v`. * @return A string representing the type of the value `v`.
*
* @param withArticle Whether to begin with an english article, e.g. "an
* integer" vs "integer".
*/ */
std::string_view showType(ValueType type); std::string_view showType(ValueType type, bool withArticle = true);
std::string showType(const Value & v); std::string showType(const Value & v);
/** /**