Tcl Source Code

.TH expr n 8.5 Tcl "Tcl Built-In Commands"
.so man.macros
.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME
expr \- Evaluate an expression
.SH SYNOPSIS
\fBexpr \fIarg \fR?\fIarg arg ...\fR?
\fBexpr \fIexpression\fR
.BE
.SH DESCRIPTION
.PP
Concatenates \fIarg\fRs, separated by a space, into an expression, and evaluates
that expression, returning its value.
Evaluates the expression, \fIexpression\fR, returning its value.
The operators permitted in an expression include a subset of
the operators permitted in C expressions.  For those operators
common to both Tcl and C, Tcl applies the same meaning and precedence
as the corresponding C operators.
The value of an expression is often a numeric result, either an integer or a
floating-point value, but may also be a non-numeric value.
For example, the expression
.PP
.CS
\fBexpr\fR 8.2 + 6
\fBexpr\fR {8.2 + 6}
.CE
.PP
evaluates to 14.2.
Expressions differ from C expressions in the way that
operands are specified.  Expressions also support
non-numeric operands, string comparisons, and some
additional operators not found in C.
.PP
When the result of expression is an integer, it is in decimal form, and when
the result is a floating-point number, it is in the form produced by the
\fB%g\fR format specifier of \fBformat\fR.
.PP
.VS "9.0, TIP 526"
Unlike with prior versions of Tcl, from Tcl 9.0 onwards, the \fBexpr\fR
command only accepts a single argument instead of concatenating an arbitrary
number of arguments to form an expression.
See \fBCOMPATIBILITY WITH TCL 8.*\fR below for details.
.VE "9.0, TIP 526"
.VS "TIP 582"
At any point in the expression except within double quotes or braces, \fB#\fR
is the beginning of a comment, which lasts to the end of the line or
the end of the expression, whichever comes first.
.VE "TIP 582"
.SS OPERANDS
.PP

\fBexpr\fR {$v?[a]:[b]}
.CE
.PP
only one of \fB[a]\fR or \fB[b]\fR is evaluated,
depending on the value of \fB$v\fR.  This is not true of the normal Tcl parser,
so it is normally recommended to enclose the arguments to \fBexpr\fR in braces.
Without braces, as in
\fBexpr\fR $v ? [a] : [b]
\fBexpr\fR $v?[a]:[b]
both \fB[a]\fR and \fB[b]\fR are evaluated before \fBexpr\fR is even called.
.PP
For more details on the results
produced by each operator, see the documentation for C.
.SS "MATH FUNCTIONS"
.PP
A mathematical function such as \fBsin($x)\fR is replaced with a call to an ordinary

.CE
.PP
both return 1.25.
A floating-point result can be distinguished from an integer result by the
presence of either
.QW \fB.\fR
or
.QW \fBe\fR
.QW \fBe\fR .
.PP
. For example,
For example,
.PP
.CS
\fBexpr\fR {20.0/5.0}
.CE
.PP
returns \fB4.0\fR, not \fB4\fR.
.SH "PERFORMANCE CONSIDERATIONS"
.SH "PERFORMANCE AND COMPATIBILITY"
.PP
Where an expression contains syntax that Tcl would otherwise perform
substitutions on, enclosing an expression in braces or otherwise quoting it
so that it's a static value allows the Tcl compiler to generate bytecode for
the expression, resulting in better speed and smaller storage requirements.
This also avoids issues that can arise if Tcl is allowed to perform
substitution on the value before \fBexpr\fR is called.
.PP
In the following example, the value of the expression is 11 because the Tcl parser first
substitutes \fB$b\fR and \fBexpr\fR then substitutes \fB$a\fR as part
of evaluating the expression
.QW "$a + 2*4" .
Enclosing the
Simply enclosing the
expression in braces would result in a syntax error as \fB$b\fR does
not evaluate to a numeric value.
.PP
.CS
set a 3
set b {$a + 2}
\fBexpr\fR $b*4

Most expressions are not formed at runtime, but are literal strings or contain
substitutions that don't introduce other substitutions.  To allow the bytecode
compiler to work with an expression as a string literal at compilation time,
ensure that it contains no substitutions or that it is enclosed in braces or
otherwise quoted to prevent Tcl from performing substitutions, allowing
\fBexpr\fR to perform them instead.
.PP
If it is necessary to include a non-constant expression string within the
wider context of an otherwise-constant expression, the most efficient
technique is to put the varying part inside a recursive \fBexpr\fR, as this at
In general, you should enclose your expression in braces wherever possible,
and where not possible, the argument to \fBexpr\fR should be an expression
defined elsewhere as simply as possible. It is usually more efficient and
safer to use other techniques (e.g., the commands in the \fBtcl::mathop\fR
least allows for the compilation of the outer part, though it does mean that
the varying part must itself be evaluated as a separate expression. Thus, in
this example the result is 20 and the outer expression benefits from fully
cached bytecode compilation.
namespace) than it is to do complex expression generation. Storing a
complex expression in a variable and using that with \fBexpr\fR is a
case which the bytecode compiler also supports well, provided that
expression is always evaluated in the same stack context (though the
expression could be conveyed across procedure calls and through
\fBuplevel\fR calls in between).
.SS "COMPATIBILITY WITH TCL 8.*"
.PP
.VS "9.0, TIP 526"
In Tcl 8 and older, the \fBexpr\fR command would concatenate multiple
arguments to form the expression; if this behavior is desired in Tcl 9.0
onwards, explicit use of \fBconcat\fR is required (this is also compatible
with earlier versions of Tcl) or a double-quoted argument could be used (as
whitespace is not generally important in expressions). Note that this style of
programming is often a source of bugs, including security bugs, so it is
\fInot recommended\fR. For example, instead of this version (supported in Tcl
8 and before):
.PP
.CS
set a 3
set b {$a + 2}
\fBexpr\fR $b * 4
.CE
.PP
you might write:
.PP
.CS
# ...
\fBexpr\fR [concat $b * 4]
.CE
.PP
or:
.PP
.CS
# ...
\fBexpr\fR "$b * 4"
.CE
.PP
Both of the above cases substitute \fB$b\fR prior to evaluating the
expression, and do the building of the expression dynamically making it
difficult to avoid compiling the expression on every call to \fBexpr\fR.
.PP
However, some use cases that \fIare\fR supported may be preferable, such as
embedding the use of \fBexpr\fR with a variable argument inside an otherwise
constant expression:
.PP
.CS
# ...
\fBexpr\fR {[\fBexpr\fR $b] * 4}
.CE
.PP
This changes what value is calculated (in this case, producing \fB20\fR rather
In general, you should enclose your expression in braces wherever possible,
and where not possible, the argument to \fBexpr\fR should be an expression
than \fB11\fR) because they force the inner expression to be evaluated
independently of the outer one; such changes may actually fix more bugs than
they cause! Note that this allows the outer expression to be fully compiled,
defined elsewhere as simply as possible. It is usually more efficient and
safer to use other techniques (e.g., the commands in the \fBtcl::mathop\fR
namespace) than it is to do complex expression generation.
and enables compilation of the inner expression too (which can be cached in
some cases).
.VE "9.0, TIP 526"
.SH EXAMPLES
.PP
A numeric comparison whose result is 1:
.PP
.CS
\fBexpr\fR {"0x03" > "2"}
.CE

    TCL_UNUSED(void *),
    Tcl_Interp *interp,		/* Current interpreter. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const objv[])	/* Argument objects. */
{
    Tcl_Obj *resultPtr, *objPtr;

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "arg ?arg ...?");
    if (objc != 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "expression");
	return TCL_ERROR;
    }

    TclNewObj(resultPtr);
    Tcl_IncrRefCount(resultPtr);
    if (objc == 2) {
	objPtr = objv[1];
	TclNRAddCallback(interp, ExprCallback, resultPtr, NULL, NULL, NULL);
    objPtr = objv[1];
    TclNRAddCallback(interp, ExprCallback, resultPtr, NULL, NULL, NULL);
    } else {
	objPtr = Tcl_ConcatObj(objc-1, objv+1);
	TclNRAddCallback(interp, ExprCallback, resultPtr, objPtr, NULL, NULL);
    }

    return Tcl_NRExprObj(interp, objPtr, resultPtr);
}

static int
ExprCallback(
    void *data[],
    Tcl_Interp *interp,
    int result)
{
    Tcl_Obj *resultPtr = (Tcl_Obj *)data[0];
    Tcl_Obj *objPtr = (Tcl_Obj *)data[1];

    if (objPtr != NULL) {
	Tcl_DecrRefCount(objPtr);
    }

    if (result == TCL_OK) {
	Tcl_SetObjResult(interp, resultPtr);
    }
    Tcl_DecrRefCount(resultPtr);
    return result;
}

    Tcl_Parse *parsePtr,	/* Points to a parse structure for the command
				 * created by Tcl_ParseCommand. */
    TCL_UNUSED(Command *),
    CompileEnv *envPtr)		/* Holds resulting instructions. */
{
    Tcl_Token *firstWordPtr;

    if (parsePtr->numWords == 1) {
    if (parsePtr->numWords != 2) {
	return TCL_ERROR;
    }

    /*
     * TIP #280: Use the per-word line information of the current command.
     */

# start of tests

catch {unset a b i x}

test compExpr-old-1.1 {TclCompileExprCmd: no expression} {
    list [catch {expr  } msg] $msg
} {1 {wrong # args: should be "expr arg ?arg ...?"}}
} {1 {wrong # args: should be "expr expression"}}
test compExpr-old-1.2 {TclCompileExprCmd: one expression word} {
    expr -25
} -25
test compExpr-old-1.3 {TclCompileExprCmd: two expression words} {
    expr -8.2   -6
} -14.2
test compExpr-old-1.4 {TclCompileExprCmd: five expression words} {
    expr 20 - 5 +10 -7
} 18
# 1.3 and 1.4 no longer apply
test compExpr-old-1.5 {TclCompileExprCmd: quoted expression word} {
    expr "0005"
} 5
test compExpr-old-1.6 {TclCompileExprCmd: quoted expression word} {
    catch {expr "0005"zxy} msg
    set msg
} {extra characters after close-quote}

test compExpr-old-1.13 {TclCompileExprCmd: second level of substitutions in expr not in braces with single var reference} {
    set a xxx
    set x 27;  set bool {$x};  if $bool {set a foo}
    set a
} foo
test compExpr-old-1.14 {TclCompileExprCmd: second level of substitutions in expr with comparison as top-level operator} {
    set a xxx
    set x 2;  set b {$x};  set a [expr $b == 2]
    set x 2;  set b {$x};  set a [expr $b==2]
    set a
} 1

test compExpr-old-2.1 {TclCompileExpr: are builtin functions registered?} {
    expr double(5*[llength "6 2"])
} 10.0
test compExpr-old-2.2 {TclCompileExpr: error in expr} -body {

	}
    }
}
testConstraint ieeeFloatingPoint [testIEEE]

# First, test all of the integer operators individually.

test expr-old-1.1 {integer operators} {expr -4} -4
test expr-old-1.2 {integer operators} {expr -(1+4)} -5
test expr-old-1.3 {integer operators} {expr ~3} -4
test expr-old-1.4 {integer operators} {expr !2} 0
test expr-old-1.5 {integer operators} {expr !0} 1
test expr-old-1.6 {integer operators} {expr 4*6} 24
test expr-old-1.7 {integer operators} {expr 36/12} 3
test expr-old-1.8 {integer operators} {expr 27/4} 6
test expr-old-1.9 {integer operators} {expr 27%4} 3
test expr-old-1.10 {integer operators} {expr 2+2} 4
test expr-old-1.11 {integer operators} {expr 2-6} -4
test expr-old-1.12 {integer operators} {expr 1<<3} 8
test expr-old-1.13 {integer operators} {expr 0xff>>2} 63
test expr-old-1.14 {integer operators} {expr -1>>2} -1
test expr-old-1.15 {integer operators} {expr 3>2} 1
test expr-old-1.16 {integer operators} {expr 2>2} 0
test expr-old-1.17 {integer operators} {expr 1>2} 0
test expr-old-1.18 {integer operators} {expr 3<2} 0
test expr-old-1.19 {integer operators} {expr 2<2} 0
test expr-old-1.20 {integer operators} {expr 1<2} 1
test expr-old-1.21 {integer operators} {expr 3>=2} 1
test expr-old-1.22 {integer operators} {expr 2>=2} 1
test expr-old-1.23 {integer operators} {expr 1>=2} 0
test expr-old-1.24 {integer operators} {expr 3<=2} 0
test expr-old-1.25 {integer operators} {expr 2<=2} 1
test expr-old-1.26 {integer operators} {expr 1<=2} 1
test expr-old-1.27 {integer operators} {expr 3==2} 0
test expr-old-1.28 {integer operators} {expr 2==2} 1
test expr-old-1.29 {integer operators} {expr 3!=2} 1
test expr-old-1.30 {integer operators} {expr 2!=2} 0
test expr-old-1.31 {integer operators} {expr 7&0x13} 3
test expr-old-1.32 {integer operators} {expr 7^0x13} 20
test expr-old-1.33 {integer operators} {expr 7|0x13} 23
test expr-old-1.34 {integer operators} {expr 0&&1} 0
test expr-old-1.35 {integer operators} {expr 0&&0} 0
test expr-old-1.36 {integer operators} {expr 1&&3} 1
test expr-old-1.37 {integer operators} {expr 0||1} 1
test expr-old-1.38 {integer operators} {expr 3||0} 1
test expr-old-1.39 {integer operators} {expr 0||0} 0
test expr-old-1.40 {integer operators} {expr 3>2?44:66} 44
test expr-old-1.41 {integer operators} {expr 2>3?44:66} 66
test expr-old-1.42 {integer operators} {expr 36/5} 7
test expr-old-1.43 {integer operators} {expr 36%5} 1
test expr-old-1.44 {integer operators} {expr -36/5} -8
test expr-old-1.45 {integer operators} {expr -36%5} 4
test expr-old-1.46 {integer operators} {expr 36/-5} -8
test expr-old-1.47 {integer operators} {expr 36%-5} -4
test expr-old-1.48 {integer operators} {expr -36/-5} 7
test expr-old-1.49 {integer operators} {expr -36%-5} -1
test expr-old-1.50 {integer operators} {expr +36} 36
test expr-old-1.51 {integer operators} {expr +--++36} 36
test expr-old-1.52 {integer operators} {expr +36%+5} 1
test expr-old-1.53 {integer operators} {
test expr-old-1.1 {integer operators} {expr {-4}} -4
test expr-old-1.2 {integer operators} {expr {-(1 + 4)}} -5
test expr-old-1.3 {integer operators} {expr {~3}} -4
test expr-old-1.4 {integer operators} {expr {!2}} 0
test expr-old-1.5 {integer operators} {expr {!0}} 1
test expr-old-1.6 {integer operators} {expr {4 * 6}} 24
test expr-old-1.7 {integer operators} {expr {36 / 12}} 3
test expr-old-1.8 {integer operators} {expr {27 / 4}} 6
test expr-old-1.9 {integer operators} {expr {27 % 4}} 3
test expr-old-1.10 {integer operators} {expr {2 + 2}} 4
test expr-old-1.11 {integer operators} {expr {2 - 6}} -4
test expr-old-1.12 {integer operators} {expr {1 << 3}} 8
test expr-old-1.13 {integer operators} {expr {0xff >> 2}} 63
test expr-old-1.14 {integer operators} {expr {-1 >> 2}} -1
test expr-old-1.15 {integer operators} {expr {3 > 2}} 1
test expr-old-1.16 {integer operators} {expr {2 > 2}} 0
test expr-old-1.17 {integer operators} {expr {1 > 2}} 0
test expr-old-1.18 {integer operators} {expr {3 < 2}} 0
test expr-old-1.19 {integer operators} {expr {2 < 2}} 0
test expr-old-1.20 {integer operators} {expr {1 < 2}} 1
test expr-old-1.21 {integer operators} {expr {3 >= 2}} 1
test expr-old-1.22 {integer operators} {expr {2 >= 2}} 1
test expr-old-1.23 {integer operators} {expr {1 >= 2}} 0
test expr-old-1.24 {integer operators} {expr {3 <= 2}} 0
test expr-old-1.25 {integer operators} {expr {2 <= 2}} 1
test expr-old-1.26 {integer operators} {expr {1 <= 2}} 1
test expr-old-1.27 {integer operators} {expr {3 == 2}} 0
test expr-old-1.28 {integer operators} {expr {2 == 2}} 1
test expr-old-1.29 {integer operators} {expr {3 != 2}} 1
test expr-old-1.30 {integer operators} {expr {2 != 2}} 0
test expr-old-1.31 {integer operators} {expr {7 & 0x13}} 3
test expr-old-1.32 {integer operators} {expr {7 ^ 0x13}} 20
test expr-old-1.33 {integer operators} {expr {7 | 0x13}} 23
test expr-old-1.34 {integer operators} {expr {0 && 1}} 0
test expr-old-1.35 {integer operators} {expr {0 && 0}} 0
test expr-old-1.36 {integer operators} {expr {1 && 3}} 1
test expr-old-1.37 {integer operators} {expr {0 || 1}} 1
test expr-old-1.38 {integer operators} {expr {3 || 0}} 1
test expr-old-1.39 {integer operators} {expr {0 || 0}} 0
test expr-old-1.40 {integer operators} {expr {3>2 ? 44 : 66}} 44
test expr-old-1.41 {integer operators} {expr {2>3 ? 44 : 66}} 66
test expr-old-1.42 {integer operators} {expr {36 / 5}} 7
test expr-old-1.43 {integer operators} {expr {36 % 5}} 1
test expr-old-1.44 {integer operators} {expr {-36 / 5}} -8
test expr-old-1.45 {integer operators} {expr {-36 % 5}} 4
test expr-old-1.46 {integer operators} {expr {36 / -5}} -8
test expr-old-1.47 {integer operators} {expr {36 % -5}} -4
test expr-old-1.48 {integer operators} {expr {-36 / -5}} 7
test expr-old-1.49 {integer operators} {expr {-36 % -5}} -1
test expr-old-1.50 {integer operators} {expr {+36}} 36
test expr-old-1.51 {integer operators} {expr {+--++36}} 36
test expr-old-1.52 {integer operators} {expr {+36%+5}} 1
test expr-old-1.53 {integer operators} -setup {
    unset -nocomplain x
} -body {
    set x yes
    list [expr {1 && $x}] [expr {$x && 1}] \
         [expr {0 || $x}] [expr {$x || 0}]
} {1 1 1 1}
} -result {1 1 1 1}

# Check the floating-point operators individually, along with
# automatic conversion to integers where needed.

test expr-old-2.1 {floating-point operators} {expr -4.2} -4.2
test expr-old-2.2 {floating-point operators} {expr -(1.125+4.25)} -5.375
test expr-old-2.3 {floating-point operators} {expr +5.7} 5.7
test expr-old-2.4 {floating-point operators} {expr +--+-62.0} -62.0
test expr-old-2.5 {floating-point operators} {expr !2.1} 0
test expr-old-2.6 {floating-point operators} {expr !0.0} 1
test expr-old-2.7 {floating-point operators} {expr 4.2*6.3} 26.46
test expr-old-2.8 {floating-point operators} {expr 36.0/12.0} 3.0
test expr-old-2.9 {floating-point operators} {expr 27/4.0} 6.75
test expr-old-2.10 {floating-point operators} {expr 2.3+2.1} 4.4
test expr-old-2.11 {floating-point operators} {expr 2.3-6.5} -4.2
test expr-old-2.12 {floating-point operators} {expr 3.1>2.1} 1
test expr-old-2.1 {floating-point operators} {expr {-4.2}} -4.2
test expr-old-2.2 {floating-point operators} {expr {-(1.125 + 4.25)}} -5.375
test expr-old-2.3 {floating-point operators} {expr {+5.7}} 5.7
test expr-old-2.4 {floating-point operators} {expr {+--+-62.0}} -62.0
test expr-old-2.5 {floating-point operators} {expr {!2.1}} 0
test expr-old-2.6 {floating-point operators} {expr {!0.0}} 1
test expr-old-2.7 {floating-point operators} {expr {4.2 * 6.3}} 26.46
test expr-old-2.8 {floating-point operators} {expr {36.0 / 12.0}} 3.0
test expr-old-2.9 {floating-point operators} {expr {27 / 4.0}} 6.75
test expr-old-2.10 {floating-point operators} {expr {2.3 + 2.1}} 4.4
test expr-old-2.11 {floating-point operators} {expr {2.3 - 6.5}} -4.2
test expr-old-2.12 {floating-point operators} {expr {3.1 > 2.1}} 1
test expr-old-2.13 {floating-point operators} {expr {2.1 > 2.1}} 0
test expr-old-2.14 {floating-point operators} {expr 1.23>2.34e+1} 0
test expr-old-2.15 {floating-point operators} {expr 3.45<2.34} 0
test expr-old-2.16 {floating-point operators} {expr 0.002e3<--200e-2} 0
test expr-old-2.17 {floating-point operators} {expr 1.1<2.1} 1
test expr-old-2.18 {floating-point operators} {expr 3.1>=2.2} 1
test expr-old-2.19 {floating-point operators} {expr 2.345>=2.345} 1
test expr-old-2.20 {floating-point operators} {expr 1.1>=2.2} 0
test expr-old-2.21 {floating-point operators} {expr 3.0<=2.0} 0
test expr-old-2.22 {floating-point operators} {expr 2.2<=2.2} 1
test expr-old-2.23 {floating-point operators} {expr 2.2<=2.2001} 1
test expr-old-2.24 {floating-point operators} {expr 3.2==2.2} 0
test expr-old-2.25 {floating-point operators} {expr 2.2==2.2} 1
test expr-old-2.26 {floating-point operators} {expr 3.2!=2.2} 1
test expr-old-2.27 {floating-point operators} {expr 2.2!=2.2} 0
test expr-old-2.28 {floating-point operators} {expr 0.0&&0.0} 0
test expr-old-2.29 {floating-point operators} {expr 0.0&&1.3} 0
test expr-old-2.30 {floating-point operators} {expr 1.3&&0.0} 0
test expr-old-2.31 {floating-point operators} {expr 1.3&&3.3} 1
test expr-old-2.32 {floating-point operators} {expr 0.0||0.0} 0
test expr-old-2.33 {floating-point operators} {expr 0.0||1.3} 1
test expr-old-2.34 {floating-point operators} {expr 1.3||0.0} 1
test expr-old-2.35 {floating-point operators} {expr 3.3||0.0} 1
test expr-old-2.36 {floating-point operators} {expr 3.3>2.3?44.3:66.3} 44.3
test expr-old-2.37 {floating-point operators} {expr 2.3>3.3?44.3:66.3} 66.3
test expr-old-2.14 {floating-point operators} {expr {1.23 > 2.34e+1}} 0
test expr-old-2.15 {floating-point operators} {expr {3.45 < 2.34}} 0
test expr-old-2.16 {floating-point operators} {expr {0.002e3<--200e-2}} 0
test expr-old-2.17 {floating-point operators} {expr {1.1 < 2.1}} 1
test expr-old-2.18 {floating-point operators} {expr {3.1 >= 2.2}} 1
test expr-old-2.19 {floating-point operators} {expr {2.345 >= 2.345}} 1
test expr-old-2.20 {floating-point operators} {expr {1.1 >= 2.2}} 0
test expr-old-2.21 {floating-point operators} {expr {3.0 <= 2.0}} 0
test expr-old-2.22 {floating-point operators} {expr {2.2 <= 2.2}} 1
test expr-old-2.23 {floating-point operators} {expr {2.2 <= 2.2001}} 1
test expr-old-2.24 {floating-point operators} {expr {3.2 == 2.2}} 0
test expr-old-2.25 {floating-point operators} {expr {2.2 == 2.2}} 1
test expr-old-2.26 {floating-point operators} {expr {3.2 != 2.2}} 1
test expr-old-2.27 {floating-point operators} {expr {2.2 != 2.2}} 0
test expr-old-2.28 {floating-point operators} {expr {0.0 && 0.0}} 0
test expr-old-2.29 {floating-point operators} {expr {0.0 && 1.3}} 0
test expr-old-2.30 {floating-point operators} {expr {1.3 && 0.0}} 0
test expr-old-2.31 {floating-point operators} {expr {1.3 && 3.3}} 1
test expr-old-2.32 {floating-point operators} {expr {0.0 || 0.0}} 0
test expr-old-2.33 {floating-point operators} {expr {0.0 || 1.3}} 1
test expr-old-2.34 {floating-point operators} {expr {1.3 || 0.0}} 1
test expr-old-2.35 {floating-point operators} {expr {3.3 || 0.0}} 1
test expr-old-2.36 {floating-point operators} {expr {3.3>2.3 ? 44.3 : 66.3}} 44.3
test expr-old-2.37 {floating-point operators} {expr {2.3>3.3 ? 44.3 : 66.3}} 66.3
test expr-old-2.38 {floating-point operators} {
    list [catch {expr 028.1 + 09.2} msg] $msg
    list [catch {expr {028.1 + 09.2}} msg] $msg
} {0 37.3}

# Operators that aren't legal on floating-point numbers

test expr-old-3.1 {illegal floating-point operations} {
    list [catch {expr ~4.0} msg] $msg
} {1 {can't use floating-point value "4.0" as operand of "~"}}
test expr-old-3.2 {illegal floating-point operations} {
    list [catch {expr 27%4.0} msg] $msg
} {1 {can't use floating-point value "4.0" as operand of "%"}}
test expr-old-3.3 {illegal floating-point operations} {
    list [catch {expr 27.0%4} msg] $msg
} {1 {can't use floating-point value "27.0" as operand of "%"}}
test expr-old-3.4 {illegal floating-point operations} {
    list [catch {expr 1.0<<3} msg] $msg
} {1 {can't use floating-point value "1.0" as operand of "<<"}}
test expr-old-3.5 {illegal floating-point operations} {
    list [catch {expr 3<<1.0} msg] $msg
} {1 {can't use floating-point value "1.0" as operand of "<<"}}
test expr-old-3.6 {illegal floating-point operations} {
    list [catch {expr 24.0>>3} msg] $msg
} {1 {can't use floating-point value "24.0" as operand of ">>"}}
test expr-old-3.7 {illegal floating-point operations} {
    list [catch {expr 24>>3.0} msg] $msg
} {1 {can't use floating-point value "3.0" as operand of ">>"}}
test expr-old-3.8 {illegal floating-point operations} {
    list [catch {expr 24&3.0} msg] $msg
} {1 {can't use floating-point value "3.0" as operand of "&"}}
test expr-old-3.9 {illegal floating-point operations} {
    list [catch {expr 24.0|3} msg] $msg
} {1 {can't use floating-point value "24.0" as operand of "|"}}
test expr-old-3.10 {illegal floating-point operations} {
    list [catch {expr 24.0^3} msg] $msg
} {1 {can't use floating-point value "24.0" as operand of "^"}}
test expr-old-3.1 {illegal floating-point operations} -returnCodes error -body {
    expr {~4.0}
} -result {can't use floating-point value "4.0" as operand of "~"}
test expr-old-3.2 {illegal floating-point operations} -returnCodes error -body {
    expr {27 % 4.0}
} -result {can't use floating-point value "4.0" as operand of "%"}
test expr-old-3.3 {illegal floating-point operations} -returnCodes error -body {
    expr {27.0 % 4}
} -result {can't use floating-point value "27.0" as operand of "%"}
test expr-old-3.4 {illegal floating-point operations} -returnCodes error -body {
    expr {1.0 << 3}
} -result {can't use floating-point value "1.0" as operand of "<<"}
test expr-old-3.5 {illegal floating-point operations} -returnCodes error -body {
    expr {3 << 1.0}
} -result {can't use floating-point value "1.0" as operand of "<<"}
test expr-old-3.6 {illegal floating-point operations} -returnCodes error -body {
    expr {24.0 >> 3}
} -result {can't use floating-point value "24.0" as operand of ">>"}
test expr-old-3.7 {illegal floating-point operations} -returnCodes error -body {
    expr {24 >> 3.0}
} -result {can't use floating-point value "3.0" as operand of ">>"}
test expr-old-3.8 {illegal floating-point operations} -returnCodes error -body {
    expr {24 & 3.0}
} -result {can't use floating-point value "3.0" as operand of "&"}
test expr-old-3.9 {illegal floating-point operations} -returnCodes error -body {
    expr {24.0 | 3}
} -result {can't use floating-point value "24.0" as operand of "|"}
test expr-old-3.10 {illegal floating-point operations} -returnCodes error -body {
    expr {24.0 ^ 3}
} -result {can't use floating-point value "24.0" as operand of "^"}

# Check the string operators individually.

test expr-old-4.1 {string operators} {expr {"abc" > "def"}} 0
test expr-old-4.2 {string operators} {expr {"def" > "def"}} 0
test expr-old-4.3 {string operators} {expr {"g" > "def"}} 1
test expr-old-4.4 {string operators} {expr {"abc" < "abd"}} 1

test expr-old-4.29 {string operators} {expr {"0" == "+"}} 0
test expr-old-4.30 {string operators} {expr {"0" == "-"}} 0
test expr-old-4.31 {string operators} {expr {1?"foo":"bar"}} foo
test expr-old-4.32 {string operators} {expr {0?"foo":"bar"}} bar

# Operators that aren't legal on string operands.

test expr-old-5.1 {illegal string operations} {
    list [catch {expr {-"a"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "-"}}
test expr-old-5.2 {illegal string operations} {
    list [catch {expr {+"a"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "+"}}
test expr-old-5.3 {illegal string operations} {
    list [catch {expr {~"a"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "~"}}
test expr-old-5.4 {illegal string operations} {
    list [catch {expr {!"a"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "!"}}
test expr-old-5.5 {illegal string operations} {
    list [catch {expr {"a"*"b"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "*"}}
test expr-old-5.6 {illegal string operations} {
    list [catch {expr {"a"/"b"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "/"}}
test expr-old-5.7 {illegal string operations} {
    list [catch {expr {"a"%"b"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "%"}}
test expr-old-5.8 {illegal string operations} {
    list [catch {expr {"a"+"b"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "+"}}
test expr-old-5.9 {illegal string operations} {
    list [catch {expr {"a"-"b"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "-"}}
test expr-old-5.10 {illegal string operations} {
    list [catch {expr {"a"<<"b"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "<<"}}
test expr-old-5.11 {illegal string operations} {
    list [catch {expr {"a">>"b"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of ">>"}}
test expr-old-5.12 {illegal string operations} {
    list [catch {expr {"a"&"b"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "&"}}
test expr-old-5.13 {illegal string operations} {
    list [catch {expr {"a"^"b"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "^"}}
test expr-old-5.14 {illegal string operations} {
    list [catch {expr {"a"|"b"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "|"}}
test expr-old-5.15 {illegal string operations} {
    list [catch {expr {"a"&&"b"}} msg] $msg
} {1 {expected boolean value but got "a"}}
test expr-old-5.16 {illegal string operations} {
    list [catch {expr {"a"||"b"}} msg] $msg
} {1 {expected boolean value but got "a"}}
test expr-old-5.17 {illegal string operations} {
    list [catch {expr {"a"?4:2}} msg] $msg
} {1 {expected boolean value but got "a"}}
test expr-old-5.1 {illegal string operations} -returnCodes error -body {
    expr {-"a"}
} -result {can't use non-numeric string "a" as operand of "-"}
test expr-old-5.2 {illegal string operations} -returnCodes error -body {
    expr {+"a"}
} -result {can't use non-numeric string "a" as operand of "+"}
test expr-old-5.3 {illegal string operations} -returnCodes error -body {
    expr {~"a"}
} -result {can't use non-numeric string "a" as operand of "~"}
test expr-old-5.4 {illegal string operations} -returnCodes error -body {
    expr {!"a"}
} -result {can't use non-numeric string "a" as operand of "!"}
test expr-old-5.5 {illegal string operations} -returnCodes error -body {
    expr {"a" * "b"}
} -result {can't use non-numeric string "a" as operand of "*"}
test expr-old-5.6 {illegal string operations} -returnCodes error -body {
    expr {"a" / "b"}
} -result {can't use non-numeric string "a" as operand of "/"}
test expr-old-5.7 {illegal string operations} -returnCodes error -body {
    expr {"a" % "b"}
} -result {can't use non-numeric string "a" as operand of "%"}
test expr-old-5.8 {illegal string operations} -returnCodes error -body {
    expr {"a" + "b"}
} -result {can't use non-numeric string "a" as operand of "+"}
test expr-old-5.9 {illegal string operations} -returnCodes error -body {
    expr {"a" - "b"}
} -result {can't use non-numeric string "a" as operand of "-"}
test expr-old-5.10 {illegal string operations} -returnCodes error -body {
    expr {"a" << "b"}
} -result {can't use non-numeric string "a" as operand of "<<"}
test expr-old-5.11 {illegal string operations} -returnCodes error -body {
    expr {"a" >> "b"}
} -result {can't use non-numeric string "a" as operand of ">>"}
test expr-old-5.12 {illegal string operations} -returnCodes error -body {
    expr {"a" & "b"}
} -result {can't use non-numeric string "a" as operand of "&"}
test expr-old-5.13 {illegal string operations} -returnCodes error -body {
    expr {"a" ^ "b"}
} -result {can't use non-numeric string "a" as operand of "^"}
test expr-old-5.14 {illegal string operations} -returnCodes error -body {
    expr {"a" | "b"}
} -result {can't use non-numeric string "a" as operand of "|"}
test expr-old-5.15 {illegal string operations} -returnCodes error -body {
    expr {"a" && "b"}
} -result {expected boolean value but got "a"}
test expr-old-5.16 {illegal string operations} -returnCodes error -body {
    expr {"a" || "b"}
} -result {expected boolean value but got "a"}
test expr-old-5.17 {illegal string operations} -returnCodes error -body {
    expr {"a" ? 4 : 2}
} -result {expected boolean value but got "a"}

# Check precedence pairwise.

test expr-old-6.1 {precedence checks} {expr -~3} 4
test expr-old-6.2 {precedence checks} {expr -!3} 0
test expr-old-6.3 {precedence checks} {expr -~0} 1
test expr-old-6.1 {precedence checks} {expr {-~3}} 4
test expr-old-6.2 {precedence checks} {expr {-!3}} 0
test expr-old-6.3 {precedence checks} {expr {-~0}} 1

test expr-old-7.1 {precedence checks} {expr 2*4/6} 1
test expr-old-7.2 {precedence checks} {expr 24/6*3} 12
test expr-old-7.3 {precedence checks} {expr 24/6/2} 2
test expr-old-7.1 {precedence checks} {expr {2 * 4 / 6}} 1
test expr-old-7.2 {precedence checks} {expr {24 / 6 * 3}} 12
test expr-old-7.3 {precedence checks} {expr {24 / 6 / 2}} 2

test expr-old-8.1 {precedence checks} {expr -2+4} 2
test expr-old-8.2 {precedence checks} {expr -2-4} -6
test expr-old-8.3 {precedence checks} {expr +2-4} -2
test expr-old-8.1 {precedence checks} {expr {-2+4}} 2
test expr-old-8.2 {precedence checks} {expr {-2-4}} -6
test expr-old-8.3 {precedence checks} {expr {+2-4}} -2

test expr-old-9.1 {precedence checks} {expr 2*3+4} 10
test expr-old-9.2 {precedence checks} {expr 8/2+4} 8
test expr-old-9.3 {precedence checks} {expr 8%3+4} 6
test expr-old-9.4 {precedence checks} {expr 2*3-1} 5
test expr-old-9.5 {precedence checks} {expr 8/2-1} 3
test expr-old-9.6 {precedence checks} {expr 8%3-1} 1
test expr-old-9.1 {precedence checks} {expr {2*3+4}} 10
test expr-old-9.2 {precedence checks} {expr {8/2+4}} 8
test expr-old-9.3 {precedence checks} {expr {8%3+4}} 6
test expr-old-9.4 {precedence checks} {expr {2*3-1}} 5
test expr-old-9.5 {precedence checks} {expr {8/2-1}} 3
test expr-old-9.6 {precedence checks} {expr {8%3-1}} 1

test expr-old-10.1 {precedence checks} {expr 6-3-2} 1
test expr-old-10.1 {precedence checks} {expr {6-3-2}} 1

test expr-old-11.1 {precedence checks} {expr 7+1>>2} 2
test expr-old-11.2 {precedence checks} {expr 7+1<<2} 32
test expr-old-11.3 {precedence checks} {expr 7>>3-2} 3
test expr-old-11.4 {precedence checks} {expr 7<<3-2} 14
test expr-old-11.1 {precedence checks} {expr {7+1>>2}} 2
test expr-old-11.2 {precedence checks} {expr {7+1<<2}} 32
test expr-old-11.3 {precedence checks} {expr {7>>3-2}} 3
test expr-old-11.4 {precedence checks} {expr {7<<3-2}} 14

test expr-old-12.1 {precedence checks} {expr 6>>1>4} 0
test expr-old-12.2 {precedence checks} {expr 6>>1<2} 0
test expr-old-12.3 {precedence checks} {expr 6>>1>=3} 1
test expr-old-12.4 {precedence checks} {expr 6>>1<=2} 0
test expr-old-12.5 {precedence checks} {expr 6<<1>5} 1
test expr-old-12.6 {precedence checks} {expr 6<<1<5} 0
test expr-old-12.7 {precedence checks} {expr 5<=6<<1} 1
test expr-old-12.8 {precedence checks} {expr 5>=6<<1} 0
test expr-old-12.1 {precedence checks} {expr {6>>1>4}} 0
test expr-old-12.2 {precedence checks} {expr {6>>1<2}} 0
test expr-old-12.3 {precedence checks} {expr {6>>1>=3}} 1
test expr-old-12.4 {precedence checks} {expr {6>>1<=2}} 0
test expr-old-12.5 {precedence checks} {expr {6<<1>5}} 1
test expr-old-12.6 {precedence checks} {expr {6<<1<5}} 0
test expr-old-12.7 {precedence checks} {expr {5<=6<<1}} 1
test expr-old-12.8 {precedence checks} {expr {5>=6<<1}} 0

test expr-old-13.1 {precedence checks} {expr 2<3<4} 1
test expr-old-13.2 {precedence checks} {expr 0<4>2} 0
test expr-old-13.3 {precedence checks} {expr 4>2<1} 0
test expr-old-13.4 {precedence checks} {expr 4>3>2} 0
test expr-old-13.5 {precedence checks} {expr 4>3>=2} 0
test expr-old-13.6 {precedence checks} {expr 4>=3>2} 0
test expr-old-13.7 {precedence checks} {expr 4>=3>=2} 0
test expr-old-13.8 {precedence checks} {expr 0<=4>=2} 0
test expr-old-13.9 {precedence checks} {expr 4>=2<=0} 0
test expr-old-13.10 {precedence checks} {expr 2<=3<=4} 1
test expr-old-13.1 {precedence checks} {expr {2<3<4}} 1
test expr-old-13.2 {precedence checks} {expr {0<4>2}} 0
test expr-old-13.3 {precedence checks} {expr {4>2<1}} 0
test expr-old-13.4 {precedence checks} {expr {4>3>2}} 0
test expr-old-13.5 {precedence checks} {expr {4>3>=2}} 0
test expr-old-13.6 {precedence checks} {expr {4>=3>2}} 0
test expr-old-13.7 {precedence checks} {expr {4>=3>=2}} 0
test expr-old-13.8 {precedence checks} {expr {0<=4>=2}} 0
test expr-old-13.9 {precedence checks} {expr {4>=2<=0}} 0
test expr-old-13.10 {precedence checks} {expr {2<=3<=4}} 1

test expr-old-14.1 {precedence checks} {expr 1==4>3} 1
test expr-old-14.2 {precedence checks} {expr 0!=4>3} 1
test expr-old-14.3 {precedence checks} {expr 1==3<4} 1
test expr-old-14.4 {precedence checks} {expr 0!=3<4} 1
test expr-old-14.5 {precedence checks} {expr 1==4>=3} 1
test expr-old-14.6 {precedence checks} {expr 0!=4>=3} 1
test expr-old-14.7 {precedence checks} {expr 1==3<=4} 1
test expr-old-14.8 {precedence checks} {expr 0!=3<=4} 1
test expr-old-14.9 {precedence checks} {expr 1eq4>3} 1
test expr-old-14.10 {precedence checks} {expr 0ne4>3} 1
test expr-old-14.11 {precedence checks} {expr 1eq3<4} 1
test expr-old-14.12 {precedence checks} {expr 0ne3<4} 1
test expr-old-14.13 {precedence checks} {expr 1eq4>=3} 1
test expr-old-14.14 {precedence checks} {expr 0ne4>=3} 1
test expr-old-14.15 {precedence checks} {expr 1eq3<=4} 1
test expr-old-14.16 {precedence checks} {expr 0ne3<=4} 1
test expr-old-14.1 {precedence checks} {expr {1==4>3}} 1
test expr-old-14.2 {precedence checks} {expr {0!=4>3}} 1
test expr-old-14.3 {precedence checks} {expr {1==3<4}} 1
test expr-old-14.4 {precedence checks} {expr {0!=3<4}} 1
test expr-old-14.5 {precedence checks} {expr {1==4>=3}} 1
test expr-old-14.6 {precedence checks} {expr {0!=4>=3}} 1
test expr-old-14.7 {precedence checks} {expr {1==3<=4}} 1
test expr-old-14.8 {precedence checks} {expr {0!=3<=4}} 1
test expr-old-14.9 {precedence checks} {expr {1eq4>3}} 1
test expr-old-14.10 {precedence checks} {expr {0ne4>3}} 1
test expr-old-14.11 {precedence checks} {expr {1eq3<4}} 1
test expr-old-14.12 {precedence checks} {expr {0ne3<4}} 1
test expr-old-14.13 {precedence checks} {expr {1eq4>=3}} 1
test expr-old-14.14 {precedence checks} {expr {0ne4>=3}} 1
test expr-old-14.15 {precedence checks} {expr {1eq3<=4}} 1
test expr-old-14.16 {precedence checks} {expr {0ne3<=4}} 1

test expr-old-15.1 {precedence checks} {expr 1==3==3} 0
test expr-old-15.2 {precedence checks} {expr 3==3!=2} 1
test expr-old-15.3 {precedence checks} {expr 2!=3==3} 0
test expr-old-15.4 {precedence checks} {expr 2!=1!=1} 0
test expr-old-15.5 {precedence checks} {expr 1eq3eq3} 0
test expr-old-15.6 {precedence checks} {expr 3eq3ne2} 1
test expr-old-15.7 {precedence checks} {expr 2ne3eq3} 0
test expr-old-15.8 {precedence checks} {expr 2ne1ne1} 0
test expr-old-15.1 {precedence checks} {expr {1==3==3}} 0
test expr-old-15.2 {precedence checks} {expr {3==3!=2}} 1
test expr-old-15.3 {precedence checks} {expr {2!=3==3}} 0
test expr-old-15.4 {precedence checks} {expr {2!=1!=1}} 0
test expr-old-15.5 {precedence checks} {expr {1eq3eq3}} 0
test expr-old-15.6 {precedence checks} {expr {3eq3ne2}} 1
test expr-old-15.7 {precedence checks} {expr {2ne3eq3}} 0
test expr-old-15.8 {precedence checks} {expr {2ne1ne1}} 0

test expr-old-16.1 {precedence checks} {expr 2&3eq2} 0
test expr-old-16.2 {precedence checks} {expr 1&3ne3} 0
test expr-old-16.3 {precedence checks} {expr 2&3eq2} 0
test expr-old-16.4 {precedence checks} {expr 1&3ne3} 0
test expr-old-16.1 {precedence checks} {expr {2&3eq2}} 0
test expr-old-16.2 {precedence checks} {expr {1&3ne3}} 0
test expr-old-16.3 {precedence checks} {expr {2&3eq2}} 0
test expr-old-16.4 {precedence checks} {expr {1&3ne3}} 0

test expr-old-17.1 {precedence checks} {expr 7&3^0x10} 19
test expr-old-17.2 {precedence checks} {expr 7^0x10&3} 7
test expr-old-17.1 {precedence checks} {expr {7&3^0x10}} 19
test expr-old-17.2 {precedence checks} {expr {7^0x10&3}} 7

test expr-old-18.1 {precedence checks} {expr 7^0x10|3} 23
test expr-old-18.2 {precedence checks} {expr 7|0x10^3} 23
test expr-old-18.1 {precedence checks} {expr {7^0x10|3}} 23
test expr-old-18.2 {precedence checks} {expr {7|0x10^3}} 23

test expr-old-19.1 {precedence checks} {expr 7|3&&1} 1
test expr-old-19.2 {precedence checks} {expr 1&&3|7} 1
test expr-old-19.3 {precedence checks} {expr 0&&1||1} 1
test expr-old-19.4 {precedence checks} {expr 1||1&&0} 1
test expr-old-19.1 {precedence checks} {expr {7|3&&1}} 1
test expr-old-19.2 {precedence checks} {expr {1&&3|7}} 1
test expr-old-19.3 {precedence checks} {expr {0&&1||1}} 1
test expr-old-19.4 {precedence checks} {expr {1||1&&0}} 1

test expr-old-20.1 {precedence checks} {expr 1||0?3:4} 3
test expr-old-20.2 {precedence checks} {expr 1?0:4||1} 0
test expr-old-20.3 {precedence checks} {expr 1?2:0?3:4} 2
test expr-old-20.4 {precedence checks} {expr 0?2:0?3:4} 4
test expr-old-20.5 {precedence checks} {expr 1?2?3:4:0} 3
test expr-old-20.6 {precedence checks} {expr 0?2?3:4:0} 0
test expr-old-20.1 {precedence checks} {expr {1||0?3:4}} 3
test expr-old-20.2 {precedence checks} {expr {1?0:4||1}} 0
test expr-old-20.3 {precedence checks} {expr {1?2:0?3:4}} 2
test expr-old-20.4 {precedence checks} {expr {0?2:0?3:4}} 4
test expr-old-20.5 {precedence checks} {expr {1?2?3:4:0}} 3
test expr-old-20.6 {precedence checks} {expr {0?2?3:4:0}} 0

# Parentheses.

test expr-old-21.1 {parenthesization} {expr (2+4)*6} 36
test expr-old-21.2 {parenthesization} {expr (1?0:4)||1} 1
test expr-old-21.3 {parenthesization} {expr +(3-4)} -1
test expr-old-21.1 {parenthesization} {expr {(2+4)*6}} 36
test expr-old-21.2 {parenthesization} {expr {(1?0:4)||1}} 1
test expr-old-21.3 {parenthesization} {expr {+(3-4)}} -1

# Embedded commands and variable names.

set a 16
test expr-old-22.1 {embedded variables} {expr {2*$a}} 32
test expr-old-22.2 {embedded variables} {
    set x -5
    set y 10
    expr {$x + $y}
} {5}
test expr-old-22.3 {embedded variables} {
    set x "  -5"
    set y "  +10"
    expr {$x + $y}
} {5}
test expr-old-22.4 {embedded commands and variables} {expr {[set a] - 14}} 2
test expr-old-22.5 {embedded commands and variables} {
    list [catch {expr {12 - [bad_command_name]}} msg] $msg
} {1 {invalid command name "bad_command_name"}}
test expr-old-22.5 {embedded commands and variables} -returnCodes error -body {
    expr {12 - [bad_command_name]}
} -result {invalid command name "bad_command_name"}

# Double-quotes and things inside them.

test expr-old-23.1 {double quotes} {expr {"abc"}} abc
test expr-old-23.2 {double quotes} {
    set a 189
    expr {"$a.bc"}

} {1 Testing}
test expr-old-23.8 {double quotes} {
    list [catch {expr {"12398712938788234-1298379" != ""}} msg] $msg
} {0 1}

# Numbers in various bases.

test expr-old-24.1 {numbers in different bases} {expr 0x20} 32
test expr-old-24.2 {numbers in different bases} {expr 0o15} 13
test expr-old-24.1 {numbers in different bases} {expr {0x20}} 32
test expr-old-24.2 {numbers in different bases} {expr {0o15}} 13

# Conversions between various data types.

test expr-old-25.1 {type conversions} {expr 2+2.5} 4.5
test expr-old-25.2 {type conversions} {expr 2.5+2} 4.5
test expr-old-25.3 {type conversions} {expr 2-2.5} -0.5
test expr-old-25.4 {type conversions} {expr 2/2.5} 0.8
test expr-old-25.5 {type conversions} {expr 2>2.5} 0
test expr-old-25.6 {type conversions} {expr 2.5>2} 1
test expr-old-25.7 {type conversions} {expr 2<2.5} 1
test expr-old-25.8 {type conversions} {expr 2>=2.5} 0
test expr-old-25.9 {type conversions} {expr 2<=2.5} 1
test expr-old-25.10 {type conversions} {expr 2==2.5} 0
test expr-old-25.11 {type conversions} {expr 2!=2.5} 1
test expr-old-25.12 {type conversions} {expr 2>"ab"} 0
test expr-old-25.1 {type conversions} {expr {2+2.5}} 4.5
test expr-old-25.2 {type conversions} {expr {2.5+2}} 4.5
test expr-old-25.3 {type conversions} {expr {2-2.5}} -0.5
test expr-old-25.4 {type conversions} {expr {2/2.5}} 0.8
test expr-old-25.5 {type conversions} {expr {2>2.5}} 0
test expr-old-25.6 {type conversions} {expr {2.5>2}} 1
test expr-old-25.7 {type conversions} {expr {2<2.5}} 1
test expr-old-25.8 {type conversions} {expr {2>=2.5}} 0
test expr-old-25.9 {type conversions} {expr {2<=2.5}} 1
test expr-old-25.10 {type conversions} {expr {2==2.5}} 0
test expr-old-25.11 {type conversions} {expr {2!=2.5}} 1
test expr-old-25.12 {type conversions} {expr {2>"ab"}} 0
test expr-old-25.13 {type conversions} {expr {2>" "}} 1
test expr-old-25.14 {type conversions} {expr {"24.1a" > 24.1}} 1
test expr-old-25.15 {type conversions} {expr {24.1 > "24.1a"}} 0
test expr-old-25.16 {type conversions} {expr 2+2.5} 4.5
test expr-old-25.17 {type conversions} {expr 2+2.5} 4.5
test expr-old-25.18 {type conversions} {expr 2.0e2} 200.0
test expr-old-25.19 {type conversions} {expr 2.0e15} 2000000000000000.0
test expr-old-25.20 {type conversions} {expr 10.0} 10.0
test expr-old-25.16 {type conversions} {expr {2+2.5}} 4.5
test expr-old-25.17 {type conversions} {expr {2+2.5}} 4.5
test expr-old-25.18 {type conversions} {expr {2.0e2}} 200.0
test expr-old-25.19 {type conversions} {expr {2.0e15}} 2000000000000000.0
test expr-old-25.20 {type conversions} {expr {10.0}} 10.0

# Various error conditions.

test expr-old-26.1 {error conditions} {
    list [catch {expr 2+"a"} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "+"}}
test expr-old-26.1 {error conditions} -returnCodes error -body {
    expr {2 + "a"}
} -result {can't use non-numeric string "a" as operand of "+"}
test expr-old-26.2 {error conditions} -body {
    expr 2+4*
    expr {2 + 4 *}
} -returnCodes error -match glob -result *
test expr-old-26.3 {error conditions} -body {
    expr 2+4*(
    expr {2 + 4 * (}
} -returnCodes error -match glob -result *
unset -nocomplain _non_existent_
test expr-old-26.4 {error conditions} {
    list [catch {expr 2+$_non_existent_} msg] $msg
} {1 {can't read "_non_existent_": no such variable}}
test expr-old-26.4 {error conditions} -returnCodes error -body {
    expr {2 + $_non_existent_}
} -result {can't read "_non_existent_": no such variable}
set a xx
test expr-old-26.5 {error conditions} {
    list [catch {expr {2+$a}} msg] $msg
} {1 {can't use non-numeric string "xx" as operand of "+"}}
test expr-old-26.6 {error conditions} {
    list [catch {expr {2+[set a]}} msg] $msg
} {1 {can't use non-numeric string "xx" as operand of "+"}}
test expr-old-26.5 {error conditions} -returnCodes error -body {
    expr {2+$a}
} -result {can't use non-numeric string "xx" as operand of "+"}
test expr-old-26.6 {error conditions} -returnCodes error -body {
    expr {2+[set a]}
} -result {can't use non-numeric string "xx" as operand of "+"}
test expr-old-26.7 {error conditions} -body {
    expr {2+(4}
} -returnCodes error -match glob -result *
test expr-old-26.8 {error conditions} {
    list [catch {expr 2/0} msg] $msg $errorCode
    list [catch {expr {2 / 0}} msg] $msg $errorCode
} {1 {divide by zero} {ARITH DIVZERO {divide by zero}}}
test expr-old-26.9 {error conditions} {
    list [catch {expr 2%0} msg] $msg $errorCode
    list [catch {expr {2 % 0}} msg] $msg $errorCode
} {1 {divide by zero} {ARITH DIVZERO {divide by zero}}}
test expr-old-26.10a {error conditions} !ieeeFloatingPoint {
    list [catch {expr 2.0/0.0} msg] $msg $errorCode
    list [catch {expr {2.0 / 0.0}} msg] $msg $errorCode
} {1 {divide by zero} {ARITH DIVZERO {divide by zero}}}
test expr-old-26.10b {error conditions} ieeeFloatingPoint {
    list [catch {expr 2.0/0.0} msg] $msg
    list [catch {expr {2.0 / 0.0}} msg] $msg
} {0 Inf}
test expr-old-26.11 {error conditions} -body {
    expr 2`
} -returnCodes error -match glob -result *
test expr-old-26.12 {error conditions} -body {
    expr a.b
    expr {a.b}
} -returnCodes error -match glob -result *
test expr-old-26.13 {error conditions} {
    list [catch {expr {"a"/"b"}} msg] $msg
} {1 {can't use non-numeric string "a" as operand of "/"}}
test expr-old-26.13 {error conditions} -returnCodes error -body {
    expr {"a"/"b"}
} -result {can't use non-numeric string "a" as operand of "/"}
test expr-old-26.14 {error conditions} -body {
    expr 2:3
    expr {2:3}
} -returnCodes error -match glob -result *
test expr-old-26.15 {error conditions} -body {
    expr a@b
    expr {a@b}
} -returnCodes error -match glob -result *
test expr-old-26.16 {error conditions} {
    list [catch {expr a[b} msg] $msg
} {1 {missing close-bracket}}
test expr-old-26.16 {error conditions} -returnCodes error -body {
    expr "\$a+\[b"
} -match glob -result {missing close-bracket*}
test expr-old-26.17 {error conditions} -body {
    expr a`b
    expr {a`b}
} -returnCodes error -match glob -result *
test expr-old-26.18 {error conditions} -body {
    expr \"a\"\{b
} -returnCodes error -match glob -result *
test expr-old-26.19 {error conditions} -body {
    expr a
} -returnCodes error -match glob -result *
test expr-old-26.20 {error conditions} {
    list [catch expr msg] $msg
} {1 {wrong # args: should be "expr arg ?arg ...?"}}
test expr-old-26.20 {error conditions} -returnCodes error -body {
    expr
} -result {wrong # args: should be "expr expression"}
test expr-old-26.21 {error conditions} -returnCodes error -body {
    expr +1 +2
} -result {wrong # args: should be "expr expression"}

# Cancelled evaluation.

test expr-old-27.1 {cancelled evaluation} {
    set a 1
    expr {0&&[set a 2]}
    set a

test expr-old-30.2 {long values} {
    set a "000000000000000000000000000000"
    set a "$a$a$a$a$a$a$a$a$a$a$a$a$a$a$a$a${a}5"
    expr $a
} 5

# Expressions spanning multiple arguments

# TIP 526: expr-old-31.* now irrelevant
test expr-old-31.1 {multiple arguments to expr command} {
    expr 4 + ( 6 *12) -3
} 73
test expr-old-31.2 {multiple arguments to expr command} -body {
    expr 2 + (3 + 4
} -returnCodes error -match glob -result *
test expr-old-31.3 {multiple arguments to expr command} -body {
    expr 2 + 3 +
} -returnCodes error -match glob -result *
test expr-old-31.4 {multiple arguments to expr command} -body {
    expr 2 + 3 )
} -returnCodes error -match glob -result *

# Math functions

test expr-old-32.1 {math functions in expressions} {
    format %.6g [expr acos(0.5)]
    format %.6g [expr {acos(0.5)}]
} {1.0472}
test expr-old-32.2 {math functions in expressions} {
    format %.6g [expr asin(0.5)]
    format %.6g [expr {asin(0.5)}]
} {0.523599}
test expr-old-32.3 {math functions in expressions} {
    format %.6g [expr atan(1.0)]
    format %.6g [expr {atan(1.0)}]
} {0.785398}
test expr-old-32.4 {math functions in expressions} {
    format %.6g [expr atan2(2.0, 2.0)]
    format %.6g [expr {atan2(2.0, 2.0)}]
} {0.785398}
test expr-old-32.5 {math functions in expressions} {
    format %.6g [expr ceil(1.999)]
    format %.6g [expr {ceil(1.999)}]
} {2}
test expr-old-32.6 {math functions in expressions} {
    format %.6g [expr cos(.1)]
    format %.6g [expr {cos(.1)}]
} {0.995004}
test expr-old-32.7 {math functions in expressions} {
    format %.6g [expr cosh(.1)]
    format %.6g [expr {cosh(.1)}]
} {1.005}
test expr-old-32.8 {math functions in expressions} {
    format %.6g [expr exp(1.0)]
    format %.6g [expr {exp(1.0)}]
} {2.71828}
test expr-old-32.9 {math functions in expressions} {
    format %.6g [expr floor(2.000)]
    format %.6g [expr {floor(2.000)}]
} {2}
test expr-old-32.10 {math functions in expressions} {
    format %.6g [expr floor(2.001)]
    format %.6g [expr {floor(2.001)}]
} {2}
test expr-old-32.11 {math functions in expressions} {
    format %.6g [expr fmod(7.3, 3.2)]
    format %.6g [expr {fmod(7.3, 3.2)}]
} {0.9}
test expr-old-32.12 {math functions in expressions} {
    format %.6g [expr hypot(3.0, 4.0)]
    format %.6g [expr {hypot(3.0, 4.0)}]
} {5}
test expr-old-32.13 {math functions in expressions} {
    format %.6g [expr log(2.8)]
    format %.6g [expr {log(2.8)}]
} {1.02962}
test expr-old-32.14 {math functions in expressions} {
    format %.6g [expr log10(2.8)]
    format %.6g [expr {log10(2.8)}]
} {0.447158}
test expr-old-32.15 {math functions in expressions} {
    format %.6g [expr pow(2.1, 3.1)]
    format %.6g [expr {pow(2.1, 3.1)}]
} {9.97424}
test expr-old-32.16 {math functions in expressions} {
    format %.6g [expr sin(.1)]
    format %.6g [expr {sin(.1)}]
} {0.0998334}
test expr-old-32.17 {math functions in expressions} {
    format %.6g [expr sinh(.1)]
    format %.6g [expr {sinh(.1)}]
} {0.100167}
test expr-old-32.18 {math functions in expressions} {
    format %.6g [expr sqrt(2.0)]
    format %.6g [expr {sqrt(2.0)}]
} {1.41421}
test expr-old-32.19 {math functions in expressions} {
    format %.6g [expr tan(0.8)]
    format %.6g [expr {tan(0.8)}]
} {1.02964}
test expr-old-32.20 {math functions in expressions} {
    format %.6g [expr tanh(0.8)]
    format %.6g [expr {tanh(0.8)}]
} {0.664037}
test expr-old-32.21 {math functions in expressions} {
    format %.6g [expr abs(-1.8)]
    format %.6g [expr {abs(-1.8)}]
} {1.8}
test expr-old-32.22 {math functions in expressions} {
    expr abs(10.0)
    expr {abs(10.0)}
} {10.0}
test expr-old-32.23 {math functions in expressions} {
    format %.6g [expr abs(-4)]
    format %.6g [expr {abs(-4)}]
} {4}
test expr-old-32.24 {math functions in expressions} {
    format %.6g [expr abs(66)]
    format %.6g [expr {abs(66)}]
} {66}

test expr-old-32.25a {math functions in expressions} {
    expr abs(0x8000000000000000)
} [expr 1<<63]
    expr {abs(0x8000000000000000)}
} [expr {1 << 63}]

test expr-old-32.25b {math functions in expressions} {
    expr abs(0x80000000)
    expr {abs(0x80000000)}
} 2147483648

test expr-old-32.26 {math functions in expressions} {
    expr double(1)
    expr {double(1)}
} {1.0}
test expr-old-32.27 {math functions in expressions} {
    expr double(1.1)
    expr {double(1.1)}
} {1.1}
test expr-old-32.28 {math functions in expressions} {
    expr int(1)
    expr {int(1)}
} {1}
test expr-old-32.29 {math functions in expressions} {
    expr int(1.4)
    expr {int(1.4)}
} {1}
test expr-old-32.30 {math functions in expressions} {
    expr int(1.6)
    expr {int(1.6)}
} {1}
test expr-old-32.31 {math functions in expressions} {
    expr int(-1.4)
    expr {int(-1.4)}
} {-1}
test expr-old-32.32 {math functions in expressions} {
    expr int(-1.6)
    expr {int(-1.6)}
} {-1}
test expr-old-32.33 {math functions in expressions} {
    expr int(1e60)
    expr {int(1e60)}
} 999999999999999949387135297074018866963645011013410073083904
test expr-old-32.34 {math functions in expressions} {
    expr int(-1e60)
    expr {int(-1e60)}
} -999999999999999949387135297074018866963645011013410073083904
test expr-old-32.35 {math functions in expressions} {
    expr round(1.49)
    expr {round(1.49)}
} {1}
test expr-old-32.36 {math functions in expressions} {
    expr round(1.51)
    expr {round(1.51)}
} {2}
test expr-old-32.37 {math functions in expressions} {
    expr round(-1.49)
    expr {round(-1.49)}
} {-1}
test expr-old-32.38 {math functions in expressions} {
    expr round(-1.51)
    expr {round(-1.51)}
} {-2}
test expr-old-32.39 {math functions in expressions} {
    expr round(1e60)
    expr {round(1e60)}
} 999999999999999949387135297074018866963645011013410073083904
test expr-old-32.40 {math functions in expressions} {
    expr round(-1e60)
    expr {round(-1e60)}
} -999999999999999949387135297074018866963645011013410073083904
test expr-old-32.41 {math functions in expressions} {
    list [catch {expr pow(1.0 + 3.0 - 2, .8 * 5)} msg] $msg
    list [catch {expr {pow(1.0 + 3.0 - 2, .8 * 5)}} msg] $msg
} {0 16.0}
test expr-old-32.42 {math functions in expressions} {
    list [catch {expr hypot(5*.8,3)} msg] $msg
    list [catch {expr {hypot(5*.8, 3)}} msg] $msg
} {0 5.0}
test expr-old-32.45 {math functions in expressions} {
    expr (0 <= rand()) && (rand() < 1)
    expr {(0 <= rand()) && (rand() < 1)}
} {1}
test expr-old-32.46 {math functions in expressions} -body {
    list [catch {expr rand(24)} msg] $msg
} -match glob -result {1 {too many arguments for math function*}}
test expr-old-32.47 {math functions in expressions} -body {
    list [catch {expr srand()} msg] $msg
} -match glob -result {1 {not enough arguments for math function*}}
test expr-old-32.48 {math functions in expressions} -body {
    expr srand(3.79)
    expr {srand(3.79)}
} -returnCodes error -match glob -result *
test expr-old-32.49 {math functions in expressions} -body {
    expr srand("")
    expr {srand("")}
} -returnCodes error -match glob -result *
test expr-old-32.50 {math functions in expressions} {
    set result [expr round(srand(12345) * 1000)]
    set result [expr {round(srand(12345) * 1000)}]
    for {set i 0} {$i < 10} {incr i} {
	lappend result [expr round(rand() * 1000)]
	lappend result [expr {round(rand() * 1000)}]
    }
    set result
} {97 834 948 36 12 51 766 585 914 784 333}
test expr-old-32.51 {math functions in expressions} -body {
    expr {srand([lindex "6ty" 0])}
} -returnCodes error -match glob -result *
test expr-old-32.52 {math functions in expressions} {
    expr {srand(int(1<<37)) < 1}
} {1}
test expr-old-32.53 {math functions in expressions} {
    expr {srand((1<<31) - 1) > 0}
} {1}

test expr-old-33.1 {conversions and fancy args to math functions} {
    expr hypot ( 3 , 4 )
    expr {hypot ( 3 , 4 )}
} 5.0
test expr-old-33.2 {conversions and fancy args to math functions} {
    expr hypot ( (2.0+1.0) , 4 )
    expr {hypot ( (2.0+1.0) , 4 )}
} 5.0
test expr-old-33.3 {conversions and fancy args to math functions} {
    expr hypot ( 3 , (3.0 + 1.0) )
    expr {hypot ( 3 , (3.0 + 1.0) )}
} 5.0
test expr-old-33.4 {conversions and fancy args to math functions} {
    format %.6g [expr cos(acos(0.1))]
    format %.6g [expr {cos(acos(0.1))}]
} 0.1

test expr-old-34.1 {errors in math functions} -body {
    list [catch {expr func_2(1.0)} msg] $msg
} -match glob -result {1 {* "*func_2"}}
test expr-old-34.1 {errors in math functions} -returnCodes error -body {
    expr {func_2(1.0)}
} -match glob -result {* "*func_2"}
test expr-old-34.2 {errors in math functions} -body {
    expr func|(1.0)
    expr {func|(1.0)}
} -returnCodes error -match glob -result *
test expr-old-34.3 {errors in math functions} {
    list [catch {expr {hypot("a b", 2.0)}} msg] $msg
} {1 {expected floating-point number but got "a b"}}
test expr-old-34.3 {errors in math functions} -returnCodes error -body {
    expr {hypot("a b", 2.0)}
} -result {expected floating-point number but got "a b"}
test expr-old-34.4 {errors in math functions} -body {
    expr hypot(1.0 2.0)
    expr {hypot(1.0 2.0)}
} -returnCodes error -match glob -result *
test expr-old-34.5 {errors in math functions} -body {
    expr hypot(1.0, 2.0
    expr {hypot(1.0, 2.0}
} -returnCodes error -match glob -result *
test expr-old-34.6 {errors in math functions} -body {
    expr hypot(1.0 ,
    expr {hypot(1.0 ,}
} -returnCodes error -match glob -result *
test expr-old-34.7 {errors in math functions} -body {
    list [catch {expr hypot(1.0)} msg] $msg
} -match glob -result {1 {not enough arguments for math function*}}
test expr-old-34.8 {errors in math functions} -body {
    list [catch {expr hypot(1.0, 2.0, 3.0)} msg] $msg
    list [catch {expr {hypot(1.0, 2.0, 3.0)}} msg] $msg
} -match glob -result {1 {too many arguments for math function*}}
test expr-old-34.9 {errors in math functions} {
    list [catch {expr acos(-2.0)} msg] $msg $errorCode
    list [catch {expr {acos(-2.0)}} msg] $msg $errorCode
} {1 {domain error: argument not in valid range} {ARITH DOMAIN {domain error: argument not in valid range}}}
test expr-old-34.10 {errors in math functions} {
    list [catch {expr pow(-3, 1000001)} msg] $msg
    list [catch {expr {pow(-3, 1000001)}} msg] $msg
} {0 -Inf}
test expr-old-34.11a {errors in math functions} !ieeeFloatingPoint {
    list [catch {expr pow(3, 1000001)} msg] $msg $errorCode
    list [catch {expr {pow(3, 1000001)}} msg] $msg $errorCode
} {1 {floating-point value too large to represent} {ARITH OVERFLOW {floating-point value too large to represent}}}
test expr-old-34.11b {errors in math functions} ieeeFloatingPoint {
    list [catch {expr pow(3, 1000001)} msg] $msg
    list [catch {expr {pow(3, 1000001)}} msg] $msg
} {0 Inf}
test expr-old-34.12a {errors in math functions} !ieeeFloatingPoint {
    list [catch {expr -14.0*exp(100000)} msg] $msg $errorCode
    list [catch {expr {-14.0 * exp(100000)}} msg] $msg $errorCode
} {1 {floating-point value too large to represent} {ARITH OVERFLOW {floating-point value too large to represent}}}
test expr-old-34.12b {errors in math functions} ieeeFloatingPoint {
    list [catch {expr -14.0*exp(100000)} msg] $msg
    list [catch {expr {-14.0 * exp(100000)}} msg] $msg
} {0 -Inf}
test expr-old-34.13 {errors in math functions} {
    expr wide(1.0e30)
    expr {wide(1.0e30)}
} 5076964154930102272
test expr-old-34.14 {errors in math functions} {
    expr wide(-1.0e30)
    expr {wide(-1.0e30)}
} -5076964154930102272
test expr-old-34.15 {errors in math functions} {
    expr round(1.0e30)
    expr {round(1.0e30)}
} 1000000000000000019884624838656
test expr-old-34.16 {errors in math functions} {
    expr round(-1.0e30)
    expr {round(-1.0e30)}
} -1000000000000000019884624838656

test expr-old-36.1 {ExprLooksLikeInt procedure} -body {
    expr 0o289
    expr {0o289}
} -returnCodes error -match glob -result {*invalid octal number*}
test expr-old-36.2 {ExprLooksLikeInt procedure} {
test expr-old-36.2 {ExprLooksLikeInt procedure} -returnCodes error -body {
    set x 0o289
    list [catch {expr {$x+1}} msg] $msg
} {1 {can't use non-numeric string "0o289" as operand of "+"}}
    expr {$x + 1}
} -result {can't use non-numeric string "0o289" as operand of "+"}
test expr-old-36.3 {ExprLooksLikeInt procedure} {
    list [catch {expr 0289.1} msg] $msg
} {0 289.1}
    expr {0289.1}
} 289.1
test expr-old-36.4 {ExprLooksLikeInt procedure} {
    set x 0289.1
    list [catch {expr {$x+1}} msg] $msg
} {0 290.1}
    expr {$x + 1}
} 290.1
test expr-old-36.5 {ExprLooksLikeInt procedure} {
    set x {  +22}
    list [catch {expr {$x+1}} msg] $msg
} {0 23}
    expr {$x+1}
} 23
test expr-old-36.6 {ExprLooksLikeInt procedure} {
    set x {	-22}
    list [catch {expr {$x+1}} msg] $msg
} {0 -21}
test expr-old-36.7 {ExprLooksLikeInt procedure} {
    list [catch {expr nan} msg] $msg
} {1 {domain error: argument not in valid range}}
    expr {$x + 1}
} -21
test expr-old-36.7 {ExprLooksLikeInt procedure} -returnCodes error -body {
    expr {nan}
} -result {domain error: argument not in valid range}
test expr-old-36.8 {ExprLooksLikeInt procedure} {
    list [catch {expr 78e1} msg] $msg
} {0 780.0}
    expr {78e1}
} 780.0
test expr-old-36.9 {ExprLooksLikeInt procedure} {
    list [catch {expr 24E1} msg] $msg
} {0 240.0}
    expr {24E1}
} 240.0
test expr-old-36.10 {ExprLooksLikeInt procedure} -body {
    expr 78e
    expr {78e}
} -returnCodes error -match glob -result *

# test for [Bug #542588]
test expr-old-36.11 {ExprLooksLikeInt procedure} {
    # define a "too large integer"; this one works also for 64bit arith
    set x 665802003400000000000000
    expr {$x+1}
} 665802003400000000000001

# tests for [Bug #587140]
test expr-old-36.12 {ExprLooksLikeInt procedure} {
test expr-old-36.12 {ExprLooksLikeInt procedure} -returnCodes error -body {
    set x "10;"
    list [catch {expr {$x+1}} msg] $msg
} {1 {can't use non-numeric string "10;" as operand of "+"}}
test expr-old-36.13 {ExprLooksLikeInt procedure} {
    expr {$x + 1}
} -result {can't use non-numeric string "10;" as operand of "+"}
test expr-old-36.13 {ExprLooksLikeInt procedure} -returnCodes error -body {
    set x " +"
    list [catch {expr {$x+1}} msg] $msg
} {1 {can't use non-numeric string " +" as operand of "+"}}
    expr {$x + 1}
} -result {can't use non-numeric string " +" as operand of "+"}
test expr-old-36.14 {ExprLooksLikeInt procedure} {
    set x "123456789012345678901234567890 "
    expr {$x+1}
    expr {$x + 1}
} 123456789012345678901234567891
test expr-old-36.15 {ExprLooksLikeInt procedure} {
test expr-old-36.15 {ExprLooksLikeInt procedure} -returnCodes error -body {
    set x "0o99 "
    list [catch {expr {$x+1}} msg] $msg
} {1 {can't use non-numeric string "0o99 " as operand of "+"}}
    expr {$x + 1}
} -result {can't use non-numeric string "0o99 " as operand of "+"}
test expr-old-36.16 {ExprLooksLikeInt procedure} {
    set x " 0xffffffffffffffffffffffffffffffffffffff  "
    expr {$x+1}
} [expr 0x100000000000000000000000000000000000000]
    expr {$x + 1}
} [expr {0x100000000000000000000000000000000000000}]

test expr-old-37.1 {Check that Tcl_ExprLong doesn't modify interpreter result if no error} testexprlong {
    testexprlong 4+1
} {This is a result: 5}
#Check for [Bug 1109484]
test expr-old-37.2 {Tcl_ExprLong handles wide ints gracefully} testexprlong {
    testexprlong wide(1)+2

#
# Test for bug #908375: rounding numbers that do not fit in a
# long but do fit in a wide
#

test expr-old-39.1 {Rounding with wide result} {
    set x 1.0e10
    set y [expr $x + 0.1]
    set y [expr {$x + 0.1}]
    catch {
	set x [list [expr {$x == round($y)}] [expr $x == -round(-$y)]]
	set x [list [expr {$x == round($y)}] [expr {$x == -round(-$y)}]]
    }
    set x
} {1 1}
unset -nocomplain x y

#
# TIP #255 min and max math functions

test expr-old-40.5 {min math function} -body {
    expr {min("a", 0)}
} -returnCodes error -match glob -result *
test expr-old-40.6 {min math function} -body {
    expr {min(300, "0xFF")}
} -result 255
test expr-old-40.7 {min math function} -body {
    expr min(1[string repeat 0 10000], 1e300)
    expr {min("1[string repeat 0 10000]", 1e300)}
} -result 1e+300
test expr-old-40.8 {min math function} -body {
    expr {min(0, "a")}
} -returnCodes error -match glob -result *

test expr-old-41.1 {max math function} -body {
    expr {max(0)}

test expr-old-41.5 {max math function} -body {
    expr {max("a", 0)}
} -returnCodes error -match glob -result *
test expr-old-41.6 {max math function} -body {
    expr {max(200, "0xFF")}
} -result 255
test expr-old-41.7 {max math function} -body {
    expr max(1[string repeat 0 10000], 1e300)
    expr {max("1[string repeat 0 10000]", 1e300)}
} -result 1[string repeat 0 10000]
test expr-old-41.8 {max math function} -body {
    expr {max(0, "a")}
} -returnCodes error -match glob -result *

# Special test for Pentium arithmetic bug of 1994:

    return $result
}

# start of tests

catch {unset a b i x}

test expr-1.1 {TclCompileExprCmd: no expression} {
    list [catch {expr  } msg] $msg
} {1 {wrong # args: should be "expr arg ?arg ...?"}}
test expr-1.1 {TclCompileExprCmd: no expression} -body {
    expr
} -returnCodes error -result {wrong # args: should be "expr expression"}
test expr-1.2 {TclCompileExprCmd: one expression word} {
    expr -25
} -25
test expr-1.3 {TclCompileExprCmd: two expression words} {
    expr -8.2   -6
    expr +25
} 25
test expr-1.3 {TclCompileExprCmd: two arguments} -body {
    expr +1 +2
} -14.2
test expr-1.4 {TclCompileExprCmd: five expression words} {
} -returnCodes error -result {wrong # args: should be "expr expression"}
    expr 20 - 5 +10 -7
} 18
# 1.4 no longer applies
test expr-1.5 {TclCompileExprCmd: quoted expression word} {
    expr "0005"
} 5
test expr-1.6 {TclCompileExprCmd: quoted expression word} {
    catch {expr "0005"zxy} msg
    set msg
} {extra characters after close-quote}

test expr-1.13 {TclCompileExprCmd: second level of substitutions in expr not in braces with single var reference} {
    set a xxx
    set x 27;  set bool {$x};  if $bool {set a foo}
    set a
} foo
test expr-1.14 {TclCompileExprCmd: second level of substitutions in expr with comparison as top-level operator} {
    set a xxx
    set x 2;  set b {$x};  set a [expr $b == 2]
    set x 2;  set b {$x};  set a [expr $b==2]
    set a
} 1
test expr-1.15 {TclCompileExprCmd: second level of substitutions in expr with comparison as top-level operator} {
    set a xxx
    set x 2;  set b {$x};  set a [expr $b eq 2]
    set x 2;  set b {$x};  set a [expr "$b eq 2"]
    set a
} 1

test expr-2.1 {TclCompileExpr: are builtin functions registered?} {
    expr double(5*[llength "6 2"])
} 10.0
test expr-2.2 {TclCompileExpr: error in expr} -body {

    list [catch {expr 1?{$a}:0} msg] $msg
} {1 {can't read "a": no such variable}}
test expr-20.5 {proper double evaluation compilation, working case} {
    set a yellow
    expr 1?{$a}:0
} yellow
test expr-20.6 {handling of compile error in trial compile} {
    list [catch {expr + {[incr]}} msg] $msg
    list [catch {expr {+[incr]}} msg] $msg
} {1 {wrong # args: should be "incr varName ?increment?"}}
test expr-20.7 {handling of compile error in runtime case} {
    list [catch {expr + {[error foo]}} msg] $msg
    list [catch {expr {+[error foo]}} msg] $msg
} {1 foo}

# Test for non-numeric boolean literal handling
test expr-21.1 	{non-numeric boolean literals} {expr false } false
test expr-21.2 	{non-numeric boolean literals} {expr true  } true
test expr-21.3 	{non-numeric boolean literals} {expr off   } off
test expr-21.4 	{non-numeric boolean literals} {expr on    } on

	test expr-31.$i.5.$j {boolean conversion} {
	    expr bool("[string range $s 0 $j]")
	} 0
	incr j
    }
    incr i
}
test expr-31.3.4.0 {boolean conversion} {expr bool(n)} 0
test expr-31.3.5.0 {boolean conversion} {expr bool("n")} 0
test expr-31.4.4.0 {boolean conversion} {expr bool(f)} 0
test expr-31.4.5.0 {boolean conversion} {expr bool("f")} 0
test expr-31.6  {boolean conversion} {expr bool(-1 + 1)} 0
test expr-31.7  {boolean conversion} {expr bool(0 + 1)} 1
test expr-31.8  {boolean conversion} {expr bool(0.0)} 0
test expr-31.9  {boolean conversion} {expr bool(0x0)} 0
test expr-31.10 {boolean conversion} {expr bool(wide(0))} 0
test expr-31.11 {boolean conversion} {expr bool(5.0)} 1
test expr-31.12 {boolean conversion} {expr bool(5)} 1
test expr-31.13 {boolean conversion} {expr bool(0x5)} 1
test expr-31.14 {boolean conversion} {expr bool(wide(5))} 1
test expr-31.3.4.0 {boolean conversion} {expr {bool(n)}} 0
test expr-31.3.5.0 {boolean conversion} {expr {bool("n")}} 0
test expr-31.4.4.0 {boolean conversion} {expr {bool(f)}} 0
test expr-31.4.5.0 {boolean conversion} {expr {bool("f")}} 0
test expr-31.6  {boolean conversion} {expr {bool(-1 + 1)}} 0
test expr-31.7  {boolean conversion} {expr {bool(0 + 1)}} 1
test expr-31.8  {boolean conversion} {expr {bool(0.0)}} 0
test expr-31.9  {boolean conversion} {expr {bool(0x0)}} 0
test expr-31.10 {boolean conversion} {expr {bool(wide(0))}} 0
test expr-31.11 {boolean conversion} {expr {bool(5.0)}} 1
test expr-31.12 {boolean conversion} {expr {bool(5)}} 1
test expr-31.13 {boolean conversion} {expr {bool(0x5)}} 1
test expr-31.14 {boolean conversion} {expr {bool(wide(5))}} 1
test expr-31.15 {boolean conversion} -body {
    expr bool("fred")
    expr {bool("fred")}
} -returnCodes error -match glob -result *

test expr-32.1 {expr mod basics} {
    set mod_nums [list \
        {-3 1} {-3 2} {-3 3} {-3 4} {-3 5} \
        {-3 -1} {-3 -2} {-3 -3} {-3 -4} {-3 -5} \
        {-2 1} {-2 2} {-2 3} {-2 4} {-2 5} \