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2020-09-06treewide: refactor internal AST structuresJo-Philipp Wich
- unify operand and value tag structures - use a contiguous array for storing opcodes - use relative offsets for next and children ops - defer function creation to runtime - rework "this" context handling by storing context pointer in scope tags Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-02treewide: rename double and null value constructor functionsJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-02eval, lib: add loadable module infrastructureJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-02eval: properly increase/decrease refcounts when dealing with scopesJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-02eval: traverse prototype chain when resolving object propertiesJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-02eval, lib: use tagged JSON objects to register C functionsJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-02eval: treat exception values as falseJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-09-02ast, eval: add tagged object handlingJo-Philipp Wich
In order to implement prototype chains later on, introduce a tagged object value type and use it when processing object declarations. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-25treewide: add proper null value handlingJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-25eval.c: fix segfault when attempting to resolve invalid lhsJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-25treewide: introduce this keywordJo-Philipp Wich
Support a new keyword `this` which allows functions to access the context they're called upon. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-25eval.c: properly propagate exceptions when resolving referencesJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-25treewide: add dedicated T_CFUNC typeJo-Philipp Wich
Tag C function values with a dedicated T_CFUNC type to clearly differentiate them from runtime declared functions. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-25lexer.c, eval.c: move T_EXCEPTION definition to lexer headerJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-24treewide: remove unneeded libubox dependencyJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-24eval.c, lib.c: allow invoking functions with existing scopeJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-23eval.c: fix segfault when invoking a tagged non-function lvalueJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
2020-08-21Initial commitJo-Philipp Wich
Signed-off-by: Jo-Philipp Wich <jo@mein.io>