diff options
| -rw-r--r-- | ChangeLog | 1 | ||||
| -rw-r--r-- | doc/expr.n | 16 |
2 files changed, 15 insertions, 2 deletions
@@ -2,6 +2,7 @@ * tests/chan.test: Clean up unwanted eofchar side-effect of chan-4.6 leading to a spurious "'" at end of chan.test under certain conditions (see [Bug 3389289] and [Bug 3389251]). + * doc/expr.n: [Bug 3594188] Clarifications about commas. 2012-12-08 Alexandre Ferrieux <ferrieux@users.sourceforge.net> * generic/tclIO.c: Fix busyloop at exit under TCL_FINALIZE_ON_EXIT @@ -39,9 +39,9 @@ additional operators not found in C. .SS OPERANDS .PP A Tcl expression consists of a combination of operands, operators, -and parentheses. +parentheses and commas. White space may be used between the operands and operators and -parentheses; it is ignored by the expression's instructions. +parentheses (or commas); it is ignored by the expression's instructions. Where possible, operands are interpreted as integer values. Integer values may be specified in decimal (the normal case), in binary (if the first two characters of the operand are \fB0b\fR), in octal @@ -283,6 +283,18 @@ rules for resolving functions in namespaces. Either current]::tcl::mathfunc::sin\fR will satisfy the request, and others may as well (depending on the current \fBnamespace path\fR setting). .PP +Some mathematical functions have several arguments, separated by commas like in C. Thus: +.PP +.CS +\fBexpr\fR {hypot($x,$y)} +.CE +.PP +ends up as +.PP +.CS +tcl::mathfunc::hypot $x $y +.CE +.PP See the \fBmathfunc\fR(n) manual page for the math functions that are available by default. .SS "TYPES, OVERFLOW, AND PRECISION" |