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sort out terminology/add explanations, add shortcut to C++, fix #6491

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2022-12-13 16:17:38 -08:00
parent 2d7a38e95e
commit cd3d38caf7
3 changed files with 26 additions and 3 deletions
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8
src/api/z3_api.h
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@ -4051,7 +4051,10 @@ extern "C" {
Z3_pattern Z3_API Z3_mk_pattern(Z3_context c, unsigned num_patterns, Z3_ast const terms[]);
/**
\brief Create a bound variable.
\brief Create a variable.
Variables are intended to be bound by a scope created by a quantifier. So we call them bound variables
even if they appear as free variables in the expression produced by \c Z3_mk_bound.
Bound variables are indexed by de-Bruijn indices. It is perhaps easiest to explain
the meaning of de-Bruijn indices by indicating the compilation process from
@ -5318,8 +5321,9 @@ extern "C" {
Z3_ast const to[]);
/**
\brief Substitute the free variables in \c a with the expressions in \c to.
\brief Substitute the variables in \c a with the expressions in \c to.
For every \c i smaller than \c num_exprs, the variable with de-Bruijn index \c i is replaced with term \ccode{to[i]}.
Note that a variable is created using the function \ref Z3_mk_bound.
def_API('Z3_substitute_vars', AST, (_in(CONTEXT), _in(AST), _in(UINT), _in_array(2, AST)))
*/