// file      : doc/manual.cli
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license   : MIT; see accompanying LICENSE file

"\name=build2-build-system-manual"
"\subject=build system"
"\title=Build System"

// NOTES
//
// - Maximum <pre> line is 70 characters.
//

"
\h0#preface|Preface|

This is the preface.

\h1#grammar|Grammar|

\
eval:         '(' (eval-comma | eval-qual)? ')'
eval-comma:   eval-ternary (',' eval-ternary)*
eval-ternary: eval-or ('?' eval-ternary ':' eval-ternary)?
eval-or:      eval-and ('||' eval-and)*
eval-and:     eval-comp ('&&' eval-comp)*
eval-comp:    eval-value (('=='|'!='|'<'|'>'|'<='|'>=') eval-value)*
eval-value:   value-attributes? (<value> | eval | '!' eval-value)
eval-qual:    <name> ':' <name>

value-attributes: '[' <key-value-pairs> ']'
\

Note that \c{?:} (ternary operator) and \c{!} (logical not) are
right-associative. Unlike C++, all the comparison operators have the same
precedence. A qualified name cannot be combined with any other operator
(including ternary) unless enclosed in parentheses. The \c{eval} option
in the \c{eval-value} production shall contain single value only (no
commas).

"