From 4aa2b717f9e050783b567540d9bb0193d692e3e9 Mon Sep 17 00:00:00 2001 From: Robin Haberkorn Date: Sat, 31 Oct 2026 13:46:11 +0100 Subject: support floating point numbers * Extends the SciTECO type system. A number on the expression stack or in a Q-register can be either an integer or a float. * Floating point constants begin with a digit (like all other numbers), are followed by a `.` and an optional fractional part. Exponents cannot currently be written. E.g. `1.` == `1.0`. But `.0` would still be `.,0`. (!) To push an integer followed by dot, you must now write e.g. `1,.` or `1 .`. * All of the basic arithmetic operators operate like this: If both operands are integers, the result is also an integer (integer arithmetics). If at least one of the operands is a float, the result is also a float (float arithmetics). * All of the binary operators (AND, OR, XOR) always cast all operands to integer and the result is always an integer as well. * You can "cast" integers to float by `*1.` or `/1.`. You can "cast" floats to integers using `#0`. * Most commands still accept only integers. Floats are implicitly casted to integers. Float-aware commands are: =, \, ^W, Qq, Uq, %q and the conditionals. * `%q` will not change the current type of register q. * Numeric part of "lexer.font" is now a float (in points). * You cannot currently print octal and hexadecimal floats. `==` and `===` are identical to `=` on floats. * `===` is now printing hex integers in lower case. This is because SciTECO's coding style for hex constants is also lower case. * `--with-teco-integer` renamed to `--with-teco-number`. --- lib/lexer.tes | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'lib/lexer.tes') diff --git a/lib/lexer.tes b/lib/lexer.tes index f7c1ae4..462996b 100644 --- a/lib/lexer.tes +++ b/lib/lexer.tes @@ -10,13 +10,13 @@ * figures in woman-pages. *! [lexer.font]Monospace -1200U[lexer.font] +12.0U[lexer.font] @[lexer.auto]{ - 0EJ-1"> 32ESSTYLESETFONTQ[lexer.font] - Q[lexer.font],32ESSTYLESETSIZEFRACTIONAL + (Q[lexer.font]*100),32ESSTYLESETSIZEFRACTIONAL ' :M[color.init] :Q*"=  ' -- cgit v1.2.3