RGBCube/uutils-coreutils
1
Fork 0
mirror of https://github.com/RGBCube/uutils-coreutils synced 2025-09-15 11:36:16 +00:00
Code Issues Activity

expr: update help to markdown syntax

Browse source
This commit is contained in:
Terts Diepraam 2022-11-18 16:01:09 +01:00 • committed by Sylvestre Ledru
parent e155a5ea6d
commit bcf3b852c6
1 changed files with 32 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

20
src/uu/expr/expr.md
View file

@ -2,7 +2,7 @@
## About ## About
Print the value of EXPRESSION to standard output Print the value of `EXPRESSION` to standard output
## Usage ## Usage
``` ```
@ -12,8 +12,10 @@ expr [OPTIONS]
## After help ## After help
Print the value of EXPRESSION to standard output. A blank line below Print the value of `EXPRESSION` to standard output. A blank line below
separates increasing precedence groups. EXPRESSION may be: separates increasing precedence groups.
`EXPRESSION` may be:
ARG1 | ARG2 ARG1 if it is neither null nor 0, otherwise ARG2 ARG1 | ARG2 ARG1 if it is neither null nor 0, otherwise ARG2
@ -49,11 +51,11 @@ Comparisons are arithmetic if both ARGs are numbers, else lexicographical.
Pattern matches return the string matched between \( and \) or null; if Pattern matches return the string matched between \( and \) or null; if
\( and \) are not used, they return the number of characters matched or 0. \( and \) are not used, they return the number of characters matched or 0.
Exit status is 0 if EXPRESSION is neither null nor 0, 1 if EXPRESSION is null Exit status is `0` if `EXPRESSION` is neither null nor `0`, `1` if `EXPRESSION` is null
or 0, 2 if EXPRESSION is syntactically invalid, and 3 if an error occurred. or `0`, `2` if `EXPRESSION` is syntactically invalid, and `3` if an error occurred.
Environment variables: Environment variables:
* EXPR_DEBUG_TOKENS=1 dump expression's tokens - `EXPR_DEBUG_TOKENS=1`: dump expression's tokens
* EXPR_DEBUG_RPN=1 dump expression represented in reverse polish notation - `EXPR_DEBUG_RPN=1`: dump expression represented in reverse polish notation
* EXPR_DEBUG_SYA_STEP=1 dump each parser step - `EXPR_DEBUG_SYA_STEP=1`: dump each parser step
* EXPR_DEBUG_AST=1 dump expression represented abstract syntax tree" - `EXPR_DEBUG_AST=1`: dump expression represented abstract syntax tree