diff options
27 files changed, 231 insertions, 37 deletions
diff --git a/doc/manual/expressions/builtins.xml b/doc/manual/expressions/builtins.xml index 40d90f78d..eae5f5a02 100644 --- a/doc/manual/expressions/builtins.xml +++ b/doc/manual/expressions/builtins.xml @@ -32,7 +32,7 @@ available as <function>builtins.derivation</function>.</para> <varlistentry><term><function>builtins.add</function> <replaceable>e1</replaceable> <replaceable>e2</replaceable></term> - <listitem><para>Return the sum of the integers + <listitem><para>Return the sum of the numbers <replaceable>e1</replaceable> and <replaceable>e2</replaceable>.</para></listitem> @@ -204,7 +204,7 @@ if builtins ? getEnv then builtins.getEnv "PATH" else ""</programlisting> <varlistentry><term><function>builtins.div</function> <replaceable>e1</replaceable> <replaceable>e2</replaceable></term> - <listitem><para>Return the quotient of the integers + <listitem><para>Return the quotient of the numbers <replaceable>e1</replaceable> and <replaceable>e2</replaceable>.</para></listitem> @@ -620,12 +620,12 @@ x: x + 456</programlisting> <varlistentry><term><function>builtins.lessThan</function> <replaceable>e1</replaceable> <replaceable>e2</replaceable></term> - <listitem><para>Return <literal>true</literal> if the integer - <replaceable>e1</replaceable> is less than the integer + <listitem><para>Return <literal>true</literal> if the number + <replaceable>e1</replaceable> is less than the number <replaceable>e2</replaceable>, and <literal>false</literal> otherwise. Evaluation aborts if either <replaceable>e1</replaceable> or <replaceable>e2</replaceable> - does not evaluate to an integer.</para></listitem> + does not evaluate to a number.</para></listitem> </varlistentry> @@ -676,7 +676,7 @@ map (x: "foo" + x) [ "bar" "bla" "abc" ]</programlisting> <varlistentry><term><function>builtins.mul</function> <replaceable>e1</replaceable> <replaceable>e2</replaceable></term> - <listitem><para>Return the product of the integers + <listitem><para>Return the product of the numbers <replaceable>e1</replaceable> and <replaceable>e2</replaceable>.</para></listitem> @@ -833,7 +833,7 @@ builtins.sort builtins.lessThan [ 483 249 526 147 42 77 ] <varlistentry><term><function>builtins.sub</function> <replaceable>e1</replaceable> <replaceable>e2</replaceable></term> - <listitem><para>Return the difference between the integers + <listitem><para>Return the difference between the numbers <replaceable>e1</replaceable> and <replaceable>e2</replaceable>.</para></listitem> @@ -960,7 +960,7 @@ in foo</programlisting> <varlistentry><term><function>builtins.toJSON</function> <replaceable>e</replaceable></term> <listitem><para>Return a string containing a JSON representation - of <replaceable>e</replaceable>. Strings, integers, booleans, + of <replaceable>e</replaceable>. Strings, integers, floats, booleans, nulls and lists are mapped to their JSON equivalents. Sets (except derivations) are represented as objects. Derivations are translated to a JSON string containing the derivation’s output diff --git a/doc/manual/expressions/derivations.xml b/doc/manual/expressions/derivations.xml index 90e2786fa..f2a73dccf 100644 --- a/doc/manual/expressions/derivations.xml +++ b/doc/manual/expressions/derivations.xml @@ -43,7 +43,7 @@ of which specify the inputs of the build.</para> <itemizedlist> - <listitem><para>Strings and integers are just passed + <listitem><para>Strings and numbers are just passed verbatim.</para></listitem> <listitem><para>A <emphasis>path</emphasis> (e.g., diff --git a/doc/manual/expressions/language-values.xml b/doc/manual/expressions/language-values.xml index 0bf6632d6..f1174ecb5 100644 --- a/doc/manual/expressions/language-values.xml +++ b/doc/manual/expressions/language-values.xml @@ -140,8 +140,13 @@ stdenv.mkDerivation { </listitem> - <listitem><para><emphasis>Integers</emphasis>, e.g., - <literal>123</literal>.</para></listitem> + <listitem><para>Numbers, which can be <emphasis>integers</emphasis> (like + <literal>123</literal>) or <emphasis>floating point</emphasis> (like + <literal>123.43</literal> or <literal>.27e13</literal>).</para> + + <para>Numbers are type-compatible: pure integer operations will always + return integers, whereas any operation involving at least one floating point + number will have a floating point number as a result.</para></listitem> <listitem><para><emphasis>Paths</emphasis>, e.g., <filename>/bin/sh</filename> or <filename>./builder.sh</filename>. diff --git a/doc/manual/release-notes/rl-1.11.xml b/doc/manual/release-notes/rl-1.11.xml index fe422dd1f..efb03d613 100644 --- a/doc/manual/release-notes/rl-1.11.xml +++ b/doc/manual/release-notes/rl-1.11.xml @@ -122,6 +122,13 @@ $ diffoscope /nix/store/11a27shh6n2i…-zlib-1.2.8 /nix/store/11a27shh6n2i…-zl </listitem> <listitem> + <para>The Nix language now supports floating point numbers. They are + based on regular C++ <literal>float</literal> and compatible with + existing integers and number-related operations. Export and import to and + from JSON and XML works, too. + </para> + </listitem> + <listitem> <para>All "chroot"-containing strings got renamed to "sandbox". In particular, some Nix options got renamed, but the old names are still accepted as lower-priority aliases. diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc index de9454422..8ce2f3dfa 100644 --- a/src/libexpr/eval.cc +++ b/src/libexpr/eval.cc @@ -128,6 +128,9 @@ static void printValue(std::ostream & str, std::set<const Value *> & active, con case tExternal: str << *v.external; break; + case tFloat: + str << v.fpoint; + break; default: throw Error("invalid value"); } @@ -161,6 +164,7 @@ string showType(const Value & v) case tPrimOp: return "a built-in function"; case tPrimOpApp: return "a partially applied built-in function"; case tExternal: return v.external->showType(); + case tFloat: return "a float"; } abort(); } @@ -579,6 +583,12 @@ Value * ExprInt::maybeThunk(EvalState & state, Env & env) return &v; } +Value * ExprFloat::maybeThunk(EvalState & state, Env & env) +{ + nrAvoided++; + return &v; +} + Value * ExprPath::maybeThunk(EvalState & state, Env & env) { nrAvoided++; @@ -666,6 +676,11 @@ void ExprInt::eval(EvalState & state, Env & env, Value & v) } +void ExprFloat::eval(EvalState & state, Env & env, Value & v) +{ + v = this->v; +} + void ExprString::eval(EvalState & state, Env & env, Value & v) { v = this->v; @@ -1211,6 +1226,7 @@ void ExprConcatStrings::eval(EvalState & state, Env & env, Value & v) PathSet context; std::ostringstream s; NixInt n = 0; + NixFloat nf = 0; bool first = !forceString; ValueType firstType = tString; @@ -1229,15 +1245,30 @@ void ExprConcatStrings::eval(EvalState & state, Env & env, Value & v) } if (firstType == tInt) { - if (vTmp.type != tInt) + if (vTmp.type == tInt) { + n += vTmp.integer; + } else if (vTmp.type == tFloat) { + // Upgrade the type from int to float; + firstType = tFloat; + nf = n; + nf += vTmp.fpoint; + } else throwEvalError("cannot add %1% to an integer, at %2%", showType(vTmp), pos); - n += vTmp.integer; + } else if (firstType == tFloat) { + if (vTmp.type == tInt) { + nf += vTmp.integer; + } else if (vTmp.type == tFloat) { + nf += vTmp.fpoint; + } else + throwEvalError("cannot add %1% to a float, at %2%", showType(vTmp), pos); } else s << state.coerceToString(pos, vTmp, context, false, firstType == tString); } if (firstType == tInt) mkInt(v, n); + else if (firstType == tFloat) + mkFloat(v, nf); else if (firstType == tPath) { if (!context.empty()) throwEvalError("a string that refers to a store path cannot be appended to a path, at %1%", pos); @@ -1295,6 +1326,17 @@ NixInt EvalState::forceInt(Value & v, const Pos & pos) } +NixFloat EvalState::forceFloat(Value & v, const Pos & pos) +{ + forceValue(v, pos); + if (v.type == tInt) + return v.integer; + else if (v.type != tFloat) + throwTypeError("value is %1% while a float was expected, at %2%", v, pos); + return v.fpoint; +} + + bool EvalState::forceBool(Value & v) { forceValue(v); @@ -1413,6 +1455,7 @@ string EvalState::coerceToString(const Pos & pos, Value & v, PathSet & context, if (v.type == tBool && v.boolean) return "1"; if (v.type == tBool && !v.boolean) return ""; if (v.type == tInt) return std::to_string(v.integer); + if (v.type == tFloat) return std::to_string(v.fpoint); if (v.type == tNull) return ""; if (v.isList()) { @@ -1474,6 +1517,13 @@ bool EvalState::eqValues(Value & v1, Value & v2) uniqList on a list of sets.) Will remove this eventually. */ if (&v1 == &v2) return true; + // Special case type-compatibility between float and int + if (v1.type == tInt && v2.type == tFloat) + return v1.integer == v2.fpoint; + if (v1.type == tFloat && v2.type == tInt) + return v1.fpoint == v2.integer; + + // All other types are not compatible with each other. if (v1.type != v2.type) return false; switch (v1.type) { @@ -1531,6 +1581,9 @@ bool EvalState::eqValues(Value & v1, Value & v2) case tExternal: return *v1.external == *v2.external; + case tFloat: + return v1.fpoint == v2.fpoint; + default: throwEvalError("cannot compare %1% with %2%", showType(v1), showType(v2)); } diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh index cf2d57864..40e05712b 100644 --- a/src/libexpr/eval.hh +++ b/src/libexpr/eval.hh @@ -147,6 +147,7 @@ public: /* Force `v', and then verify that it has the expected type. */ NixInt forceInt(Value & v, const Pos & pos); + NixFloat forceFloat(Value & v, const Pos & pos); bool forceBool(Value & v); inline void forceAttrs(Value & v); inline void forceAttrs(Value & v, const Pos & pos); diff --git a/src/libexpr/get-drvs.cc b/src/libexpr/get-drvs.cc index 1002ee628..996c2c5f4 100644 --- a/src/libexpr/get-drvs.cc +++ b/src/libexpr/get-drvs.cc @@ -106,7 +106,8 @@ bool DrvInfo::checkMeta(Value & v) if (!checkMeta(*i.value)) return false; return true; } - else return v.type == tInt || v.type == tBool || v.type == tString; + else return v.type == tInt || v.type == tBool || v.type == tString || + v.type == tFloat; } @@ -127,7 +128,7 @@ string DrvInfo::queryMetaString(const string & name) } -int DrvInfo::queryMetaInt(const string & name, int def) +NixInt DrvInfo::queryMetaInt(const string & name, NixInt def) { Value * v = queryMeta(name); if (!v) return def; @@ -135,12 +136,26 @@ int DrvInfo::queryMetaInt(const string & name, int def) if (v->type == tString) { /* Backwards compatibility with before we had support for integer meta fields. */ - int n; + NixInt n; if (string2Int(v->string.s, n)) return n; } return def; } +NixFloat DrvInfo::queryMetaFloat(const string & name, NixFloat def) +{ + Value * v = queryMeta(name); + if (!v) return def; + if (v->type == tFloat) return v->fpoint; + if (v->type == tString) { + /* Backwards compatibility with before we had support for + float meta fields. */ + NixFloat n; + if (string2Float(v->string.s, n)) return n; + } + return def; +} + bool DrvInfo::queryMetaBool(const string & name, bool def) { diff --git a/src/libexpr/get-drvs.hh b/src/libexpr/get-drvs.hh index 98f762494..365c66c8d 100644 --- a/src/libexpr/get-drvs.hh +++ b/src/libexpr/get-drvs.hh @@ -47,7 +47,8 @@ public: StringSet queryMetaNames(); Value * queryMeta(const string & name); string queryMetaString(const string & name); - int queryMetaInt(const string & name, int def); + NixInt queryMetaInt(const string & name, NixInt def); + NixFloat queryMetaFloat(const string & name, NixFloat def); bool queryMetaBool(const string & name, bool def); void setMeta(const string & name, Value * v); diff --git a/src/libexpr/json-to-value.cc b/src/libexpr/json-to-value.cc index 0898b5609..7ef2b2c56 100644 --- a/src/libexpr/json-to-value.cc +++ b/src/libexpr/json-to-value.cc @@ -105,17 +105,22 @@ static void parseJSON(EvalState & state, const char * & s, Value & v) mkString(v, parseJSONString(s)); } - else if (isdigit(*s) || *s == '-') { - bool neg = false; - if (*s == '-') { - neg = true; - if (!*++s) throw JSONParseError("unexpected end of JSON number"); + else if (isdigit(*s) || *s == '-' || *s == '.' ) { + // Buffer into a string first, then use built-in C++ conversions + std::string tmp_number; + ValueType number_type = tInt; + + while (isdigit(*s) || *s == '-' || *s == '.' || *s == 'e' || *s == 'E') { + if (*s == '.' || *s == 'e' || *s == 'E') + number_type = tFloat; + tmp_number.append(*s++, 1); + } + + if (number_type == tFloat) { + mkFloat(v, stod(tmp_number)); + } else { + mkInt(v, stoi(tmp_number)); } - NixInt n = 0; - // FIXME: detect overflow - while (isdigit(*s)) n = n * 10 + (*s++ - '0'); - if (*s == '.' || *s == 'e') throw JSONParseError("floating point JSON numbers are not supported"); - mkInt(v, neg ? -n : n); } else if (strncmp(s, "true", 4) == 0) { diff --git a/src/libexpr/lexer.l b/src/libexpr/lexer.l index 478f41641..701c01aff 100644 --- a/src/libexpr/lexer.l +++ b/src/libexpr/lexer.l @@ -86,6 +86,7 @@ static Expr * unescapeStr(SymbolTable & symbols, const char * s) ID [a-zA-Z\_][a-zA-Z0-9\_\'\-]* INT [0-9]+ +FLOAT (([1-9][0-9]*\.[0-9]*)|(0?\.[0-9]+))([Ee][+-]?[0-9]+)? PATH [a-zA-Z0-9\.\_\-\+]*(\/[a-zA-Z0-9\.\_\-\+]+)+ HPATH \~(\/[a-zA-Z0-9\.\_\-\+]+)+ SPATH \<[a-zA-Z0-9\.\_\-\+]+(\/[a-zA-Z0-9\.\_\-\+]+)*\> @@ -126,6 +127,12 @@ or { return OR_KW; } throw ParseError(format("invalid integer ‘%1%’") % yytext); return INT; } +{FLOAT} { errno = 0; + yylval->nf = strtod(yytext, 0); + if (errno != 0) + throw ParseError(format("invalid float ‘%1%’") % yytext); + return FLOAT; + } \$\{ { PUSH_STATE(INSIDE_DOLLAR_CURLY); return DOLLAR_CURLY; } } diff --git a/src/libexpr/nixexpr.cc b/src/libexpr/nixexpr.cc index 5bc8e4202..b2c9f0528 100644 --- a/src/libexpr/nixexpr.cc +++ b/src/libexpr/nixexpr.cc @@ -68,6 +68,11 @@ void ExprInt::show(std::ostream & str) str << n; } +void ExprFloat::show(std::ostream & str) +{ + str << nf; +} + void ExprString::show(std::ostream & str) { showString(str, s); @@ -226,6 +231,10 @@ void ExprInt::bindVars(const StaticEnv & env) { } +void ExprFloat::bindVars(const StaticEnv & env) +{ +} + void ExprString::bindVars(const StaticEnv & env) { } diff --git a/src/libexpr/nixexpr.hh b/src/libexpr/nixexpr.hh index ef07d4557..5e7bc40c8 100644 --- a/src/libexpr/nixexpr.hh +++ b/src/libexpr/nixexpr.hh @@ -98,6 +98,15 @@ struct ExprInt : Expr Value * maybeThunk(EvalState & state, Env & env); }; +struct ExprFloat : Expr +{ + NixFloat nf; + Value v; + ExprFloat(NixFloat nf) : nf(nf) { mkFloat(v, nf); }; + COMMON_METHODS + Value * maybeThunk(EvalState & state, Env & env); +}; + struct ExprString : Expr { Symbol s; diff --git a/src/libexpr/parser.y b/src/libexpr/parser.y index 3e6c6d917..f87aa2619 100644 --- a/src/libexpr/parser.y +++ b/src/libexpr/parser.y @@ -244,6 +244,7 @@ void yyerror(YYLTYPE * loc, yyscan_t scanner, ParseData * data, const char * err nix::Formals * formals; nix::Formal * formal; nix::NixInt n; + nix::NixFloat nf; const char * id; // !!! -> Symbol char * path; char * uri; @@ -264,6 +265,7 @@ void yyerror(YYLTYPE * loc, yyscan_t scanner, ParseData * data, const char * err %token <id> ID ATTRPATH %token <e> STR IND_STR %token <n> INT +%token <nf> FLOAT %token <path> PATH HPATH SPATH %token <uri> URI %token IF THEN ELSE ASSERT WITH LET IN REC INHERIT EQ NEQ AND OR IMPL OR_KW @@ -366,6 +368,7 @@ expr_simple $$ = new ExprVar(CUR_POS, data->symbols.create($1)); } | INT { $$ = new ExprInt($1); } + | FLOAT { $$ = new ExprFloat($1); } | '"' string_parts '"' { $$ = $2; } | IND_STRING_OPEN ind_string_parts IND_STRING_CLOSE { $$ = stripIndentation(CUR_POS, data->symbols, *$2); diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc index 2371ae174..3c899d769 100644 --- a/src/libexpr/primops.cc +++ b/src/libexpr/primops.cc @@ -195,6 +195,7 @@ static void prim_typeOf(EvalState & state, const Pos & pos, Value * * args, Valu case tExternal: t = args[0]->external->typeOf(); break; + case tFloat: t = "float"; break; default: abort(); } mkString(v, state.symbols.create(t)); @@ -224,6 +225,12 @@ static void prim_isInt(EvalState & state, const Pos & pos, Value * * args, Value mkBool(v, args[0]->type == tInt); } +/* Determine whether the argument is a float. */ +static void prim_isFloat(EvalState & state, const Pos & pos, Value * * args, Value & v) +{ + state.forceValue(*args[0]); + mkBool(v, args[0]->type == tFloat); +} /* Determine whether the argument is a string. */ static void prim_isString(EvalState & state, const Pos & pos, Value * * args, Value & v) @@ -245,11 +252,17 @@ struct CompareValues { bool operator () (const Value * v1, const Value * v2) const { + if (v1->type == tFloat && v2->type == tInt) + return v1->fpoint < v2->integer; + if (v1->type == tInt && v2->type == tFloat) + return v1->integer < v2->fpoint; if (v1->type != v2->type) throw EvalError(format("cannot compare %1% with %2%") % showType(*v1) % showType(*v2)); switch (v1->type) { case tInt: return v1->integer < v2->integer; + case tFloat: + return v1->fpoint < v2->fpoint; case tString: return strcmp(v1->string.s, v2->string.s) < 0; case tPath: @@ -1423,27 +1436,40 @@ static void prim_sort(EvalState & state, const Pos & pos, Value * * args, Value static void prim_add(EvalState & state, const Pos & pos, Value * * args, Value & v) { - mkInt(v, state.forceInt(*args[0], pos) + state.forceInt(*args[1], pos)); + if (args[0]->type == tFloat || args[1]->type == tFloat) + mkFloat(v, state.forceFloat(*args[0], pos) + state.forceFloat(*args[1], pos)); + else + mkInt(v, state.forceInt(*args[0], pos) + state.forceInt(*args[1], pos)); } static void prim_sub(EvalState & state, const Pos & pos, Value * * args, Value & v) { - mkInt(v, state.forceInt(*args[0], pos) - state.forceInt(*args[1], pos)); + if (args[0]->type == tFloat || args[1]->type == tFloat) + mkFloat(v, state.forceFloat(*args[0], pos) - state.forceFloat(*args[1], pos)); + else + mkInt(v, state.forceInt(*args[0], pos) - state.forceInt(*args[1], pos)); } static void prim_mul(EvalState & state, const Pos & pos, Value * * args, Value & v) { - mkInt(v, state.forceInt(*args[0], pos) * state.forceInt(*args[1], pos)); + if (args[0]->type == tFloat || args[1]->type == tFloat) + mkFloat(v, state.forceFloat(*args[0], pos) * state.forceFloat(*args[1], pos)); + else + mkInt(v, state.forceInt(*args[0], pos) * state.forceInt(*args[1], pos)); } static void prim_div(EvalState & state, const Pos & pos, Value * * args, Value & v) { - NixInt i2 = state.forceInt(*args[1], pos); - if (i2 == 0) throw EvalError(format("division by zero, at %1%") % pos); - mkInt(v, state.forceInt(*args[0], pos) / i2); + NixFloat f2 = state.forceFloat(*args[1], pos); + if (f2 == 0) throw EvalError(format("division by zero, at %1%") % pos); + + if (args[0]->type == tFloat || args[1]->type == tFloat) + mkFloat(v, state.forceFloat(*args[0], pos) / state.forceFloat(*args[1], pos)); + else + mkInt(v, state.forceInt(*args[0], pos) / state.forceInt(*args[1], pos)); } @@ -1735,7 +1761,7 @@ void EvalState::createBaseEnv() language feature gets added. It's not necessary to increase it when primops get added, because you can just use `builtins ? primOp' to check. */ - mkInt(v, 3); + mkInt(v, 4); addConstant("__langVersion", v); // Miscellaneous @@ -1752,6 +1778,7 @@ void EvalState::createBaseEnv() addPrimOp("__isFunction", 1, prim_isFunction); addPrimOp("__isString", 1, prim_isString); addPrimOp("__isInt", 1, prim_isInt); + addPrimOp("__isFloat", 1, prim_isFloat); addPrimOp("__isBool", 1, prim_isBool); addPrimOp("__genericClosure", 1, prim_genericClosure); addPrimOp("abort", 1, prim_abort); diff --git a/src/libexpr/value-to-json.cc b/src/libexpr/value-to-json.cc index b0cf85e21..47ee324a6 100644 --- a/src/libexpr/value-to-json.cc +++ b/src/libexpr/value-to-json.cc @@ -84,6 +84,10 @@ void printValueAsJSON(EvalState & state, bool strict, v.external->printValueAsJSON(state, strict, str, context); break; + case tFloat: + str << v.fpoint; + break; + default: throw TypeError(format("cannot convert %1% to JSON") % showType(v)); } diff --git a/src/libexpr/value-to-xml.cc b/src/libexpr/value-to-xml.cc index cb52ce1e6..00b1918a8 100644 --- a/src/libexpr/value-to-xml.cc +++ b/src/libexpr/value-to-xml.cc @@ -148,6 +148,10 @@ static void printValueAsXML(EvalState & state, bool strict, bool location, v.external->printValueAsXML(state, strict, location, doc, context, drvsSeen); break; + case tFloat: + doc.writeEmptyElement("float", singletonAttrs("value", (format("%1%") % v.fpoint).str())); + break; + default: doc.writeEmptyElement("unevaluated"); } diff --git a/src/libexpr/value.hh b/src/libexpr/value.hh index e6d1502cb..62bdd9281 100644 --- a/src/libexpr/value.hh +++ b/src/libexpr/value.hh @@ -22,6 +22,7 @@ typedef enum { tPrimOp, tPrimOpApp, tExternal, + tFloat } ValueType; @@ -38,6 +39,7 @@ class XMLWriter; typedef long NixInt; +typedef float NixFloat; /* External values must descend from ExternalValueBase, so that * type-agnostic nix functions (e.g. showType) can be implemented @@ -141,6 +143,7 @@ struct Value Value * left, * right; } primOpApp; ExternalValueBase * external; + NixFloat fpoint; }; bool isList() const @@ -181,6 +184,14 @@ static inline void mkInt(Value & v, NixInt n) } +static inline void mkFloat(Value & v, NixFloat n) +{ + clearValue(v); + v.type = tFloat; + v.fpoint = n; +} + + static inline void mkBool(Value & v, bool b) { clearValue(v); diff --git a/src/libmain/shared.hh b/src/libmain/shared.hh index e4b984f06..3f3f6f723 100644 --- a/src/libmain/shared.hh +++ b/src/libmain/shared.hh @@ -66,6 +66,7 @@ template<class N> N getIntArg(const string & opt, return n * multiplier; } + /* Show the manual page for the specified program. */ void showManPage(const string & name); diff --git a/src/libutil/util.hh b/src/libutil/util.hh index b714cdc64..9eebb67fd 100644 --- a/src/libutil/util.hh +++ b/src/libutil/util.hh @@ -366,6 +366,14 @@ template<class N> bool string2Int(const string & s, N & n) return str && str.get() == EOF; } +/* Parse a string into a float. */ +template<class N> bool string2Float(const string & s, N & n) +{ + std::istringstream str(s); + str >> n; + return str && str.get() == EOF; +} + /* Return true iff `s' ends in `suffix'. */ bool hasSuffix(const string & s, const string & suffix); diff --git a/src/nix-env/nix-env.cc b/src/nix-env/nix-env.cc index 12e19d4af..a9d1ed024 100644 --- a/src/nix-env/nix-env.cc +++ b/src/nix-env/nix-env.cc @@ -1127,6 +1127,10 @@ static void opQuery(Globals & globals, Strings opFlags, Strings opArgs) attrs2["type"] = "int"; attrs2["value"] = (format("%1%") % v->integer).str(); xml.writeEmptyElement("meta", attrs2); + } else if (v->type == tFloat) { + attrs2["type"] = "float"; + attrs2["value"] = (format("%1%") % v->fpoint).str(); + xml.writeEmptyElement("meta", attrs2); } else if (v->type == tBool) { attrs2["type"] = "bool"; attrs2["value"] = v->boolean ? "true" : "false"; diff --git a/tests/lang/eval-okay-fromjson.nix b/tests/lang/eval-okay-fromjson.nix index 5ed0c1c43..2a9ad0cab 100644 --- a/tests/lang/eval-okay-fromjson.nix +++ b/tests/lang/eval-okay-fromjson.nix @@ -12,7 +12,9 @@ builtins.fromJSON "Width": 100 }, "Animated" : false, - "IDs": [116, 943, 234, 38793, true ,false,null, -100] + "IDs": [116, 943, 234, 38793, true ,false,null, -100], + "Latitude": 37.7668, + "Longitude": -122.3959, } } '' @@ -28,5 +30,7 @@ builtins.fromJSON }; Animated = false; IDs = [ 116 943 234 38793 true false null (0-100) ]; + Latitude = 37.7668; + Longitude = -122.3959; }; } diff --git a/tests/lang/eval-okay-tojson.exp b/tests/lang/eval-okay-tojson.exp index e8164af2b..33588493f 100644 --- a/tests/lang/eval-okay-tojson.exp +++ b/tests/lang/eval-okay-tojson.exp @@ -1 +1 @@ -"{\"a\":123,\"b\":-456,\"c\":\"foo\",\"d\":\"foo\\n\\\"bar\\\"\",\"e\":true,\"f\":false,\"g\":[1,2,3],\"h\":[\"a\",[\"b\",{\"foo\\nbar\":{}}]],\"i\":3}" +"{\"a\":123,\"b\":-456,\"c\":\"foo\",\"d\":\"foo\\n\\\"bar\\\"\",\"e\":true,\"f\":false,\"g\":[1,2,3],\"h\":[\"a\",[\"b\",{\"foo\\nbar\":{}}]],\"i\":3,\"j\":1.44}" diff --git a/tests/lang/eval-okay-tojson.nix b/tests/lang/eval-okay-tojson.nix index 0d4e55b3d..c046ba4ae 100644 --- a/tests/lang/eval-okay-tojson.nix +++ b/tests/lang/eval-okay-tojson.nix @@ -8,4 +8,5 @@ builtins.toJSON g = [ 1 2 3 ]; h = [ "a" [ "b" { "foo\nbar" = {}; } ] ]; i = 1 + 2; + j = 1.44; } diff --git a/tests/lang/eval-okay-types.exp b/tests/lang/eval-okay-types.exp index 82487f710..9a8ea0bcb 100644 --- a/tests/lang/eval-okay-types.exp +++ b/tests/lang/eval-okay-types.exp @@ -1 +1 @@ -[ true false true false true false true false true false true false "int" "bool" "string" "null" "set" "list" "lambda" "lambda" "lambda" "lambda" ] +[ true false true false true false true false true true true true true true true true true true true false true false "int" "bool" "string" "null" "set" "list" "lambda" "lambda" "lambda" "lambda" ] diff --git a/tests/lang/eval-okay-types.nix b/tests/lang/eval-okay-types.nix index 8cb225e24..a34775f5e 100644 --- a/tests/lang/eval-okay-types.nix +++ b/tests/lang/eval-okay-types.nix @@ -8,6 +8,16 @@ with builtins; (isString [ "x" ]) (isInt (1 + 2)) (isInt { x = 123; }) + (isInt (1 / 2)) + (isInt (1 + 1)) + (isInt (1 / 2)) + (isInt (1 * 2)) + (isInt (1 - 2)) + (isFloat (1.2)) + (isFloat (1 + 1.0)) + (isFloat (1 / 2.0)) + (isFloat (1 * 2.0)) + (isFloat (1 - 2.0)) (isBool (true && false)) (isBool null) (isAttrs { x = 123; }) diff --git a/tests/lang/eval-okay-xml.exp.xml b/tests/lang/eval-okay-xml.exp.xml index f124f939e..92b75e0b8 100644 --- a/tests/lang/eval-okay-xml.exp.xml +++ b/tests/lang/eval-okay-xml.exp.xml @@ -45,5 +45,8 @@ <attr name="x"> <int value="123" /> </attr> + <attr name="y"> + <float value="567.89" /> + </attr> </attrs> </expr> diff --git a/tests/lang/eval-okay-xml.nix b/tests/lang/eval-okay-xml.nix index b9389bfae..9ee9f8a0b 100644 --- a/tests/lang/eval-okay-xml.nix +++ b/tests/lang/eval-okay-xml.nix @@ -2,6 +2,8 @@ rec { x = 123; + y = 567.890; + a = "foo"; b = "bar"; |