diff options
author | pooryorick <com.digitalsmarties@pooryorick.com> | 2016-10-05 04:53:49 (GMT) |
---|---|---|
committer | pooryorick <com.digitalsmarties@pooryorick.com> | 2016-10-05 04:53:49 (GMT) |
commit | 69e7f1b52d7d59ea5b1b6cb027c8fbdc88b9d38d (patch) | |
tree | d65b7e1d01b9ac06a8d98a038da23b397a612a65 | |
parent | 2655e9896fe938d39815b319a328f7dcfe1651bc (diff) | |
download | tcl-69e7f1b52d7d59ea5b1b6cb027c8fbdc88b9d38d.zip tcl-69e7f1b52d7d59ea5b1b6cb027c8fbdc88b9d38d.tar.gz tcl-69e7f1b52d7d59ea5b1b6cb027c8fbdc88b9d38d.tar.bz2 |
Fix typos in expr documentation.
-rw-r--r-- | doc/expr.n | 22 |
1 files changed, 11 insertions, 11 deletions
@@ -17,13 +17,13 @@ expr \- Evaluate an expression .BE .SH DESCRIPTION .PP -Concatenates \fIarg\fRs, separated by a space, into an expresion, and evaluates +Concatenates \fIarg\fRs, separated by a space, into an expression, and evaluates that expression, 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 expressions is often a numeric result, either an integer or a +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 @@ -33,7 +33,7 @@ For example, the expression .PP evaluates to 14.2. Expressions differ from C expressions in the way that -operands are specified. Also, expressions support +operands are specified. Expressions also support non-numeric operands, string comparisons, and some additional operators not found in C. .PP @@ -199,10 +199,10 @@ Logical OR. If both operands are false, the result is 0, or 1 otherwise. If-then-else, as in C. If \fIx\fR is false , the result is the value of \fIy\fR. Otherwise the result is the value of \fIz\fR. .PP -The exponentiation operator promotes types in the same way as the multiply -and divide operators, and the result is is the same as the result of +The exponentiation operator promotes types in the same way that the multiply +and divide operators do, and the result is is the same as the result of \fBpow\fR. -exponentiation groups right-to-left within a precedence level. Other binary +Exponentiation groups right-to-left within a precedence level. Other binary operators group left-to-right. For example, the value of .PP .CS @@ -217,9 +217,9 @@ is 0, while the value of .PP is 512. .PP -\fB&&\fR, \fB||\fR, and \fB?:\fR feature +As in C, \fB&&\fR, \fB||\fR, and \fB?:\fR feature .QW "lazy evaluation" , -just as in C, which means that operands are not evaluated if they are +which means that operands are not evaluated if they are not needed to determine the outcome. For example, in .PP .CS @@ -258,7 +258,7 @@ tcl::mathfunc::sin [\fBexpr\fR {$x+$y}] .CE .PP \fBtcl::mathfunc::sin\fR is resolved as described in -\fBNAMESPACE RESOLUTION\fR in the \fBnamespace\fR documentation. Given the +\fBNAMESPACE RESOLUTION\fR in the \fBnamespace\fR(n) documentation. Given the default value of \fBnamespace path\fR, \fB[namespace current]::tcl::mathfunc::sin\fR or \fB::tcl::mathfunc::sin\fR are the typical resolutions. @@ -288,8 +288,8 @@ Any code that relied on these implicit truncations should instead call \fBint()\fR or \fBwide()\fR, which do truncate. .PP Internal floating-point computations are -performed using the C type \fIdouble\fR. -When converting a string to floating-point, exponent overflow is +performed using the \fIdouble\fR C type. +When converting a string to floating-point value, exponent overflow is detected and results in the \fIdouble\fR value of \fBInf\fR or \fB\-Inf\fR as appropriate. Floating-point overflow and underflow are detected to the degree supported by the hardware, which is generally |